A facile and low-cost synthesis of MnOx /Mn2 N–N–C nanohybrid as an advanced oxygen reduction electrocatalyst
作者：
Liu, Kun;Li, Jun;Li, Junhua;Wang, Jin;Zhao, Dan;...
期刊：
Materials Research Bulletin ,2018年104:60-64 ISSN：0025-5408
通讯作者：
Qian, Dong
作者机构：
[Li, Jun; Liu, Kun; Li, Junhua; Wang, Jin; Zhao, Dan; Jiang, Jianbo; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.;[Liu, Kun; Qian, Dong] Cent S Univ, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.
通讯机构：
[Qian, Dong] C;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.
关键词：
A. Nitrides;A. Oxides;A. Nanostructures;D. Catalytic properties;D. Electrochemical properties
摘要：
We demonstrate a one-step, low-cost and easily scalable pyrolysis route to fabricate a novel MnO<inf>x</inf>/Mn<inf>2</inf>N–N–C nanohybrid with MnO<inf>x</inf>/Mn<inf>2</inf>N nanoparticles (20–30 nm) anchored on the wrinkled N-doped carbon nanosheets (denoted as N–C). MnO<inf>x</inf>/Mn<inf>2</inf>N–N–C displays a remarkably higher ORR activity than that of N–C, suggesting that the MnO<inf>x</inf>/Mn<inf>2</inf>N nanoparticles play an important role in enhancing the ORR activity. Furthermore, MnO<inf>x</inf>/Mn<inf>2</inf>N–N–C exhibits overwhelmingly better durability than commercial 20 wt% Pt/C, to be specific, 93.7% current retention after continuous operation for 24,000 s, while 59.7% for 20 wt% Pt/C.<br/> ©2018 Elsevier Ltd
语种：
英文
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A systematically comparative study on LiNO3 and Li2 SO4 aqueous electrolytes for electrochemical double-layer capacitors
作者：
Jiang, Jianbo;Liu, Beibei;Liu, Guiyu;Qian, Dong* ;Yang, Chunming;...
期刊：
Electrochimica Acta ,2018年274:121-130 ISSN：0013-4686
通讯作者：
Qian, Dong;Li, Junhua
作者机构：
[Jiang, Jianbo; Liu, Beibei; Qian, Dong; Liu, Guiyu] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Qian, Dong] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.;[Yang, Chunming] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Qian, Dong] C;[Li, Junhua] H;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.;Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.
关键词：
Conductivity;Li 2 SO 4 aqueous electrolyte;LiNO 3 aqueous electrolyte;Supercapacitive performance;Viscosity
摘要：
In this work, highly soluble LiNO<inf>3</inf>was adopted as the neutrally aqueous electrolyte for active carbon (AC)-based electrochemical double-layer capacitors (EDLCs), of which the electrochemical performances were evaluated. Simultaneously, the physicochemical properties such as the ionic conductivity and viscosity of the LiNO<inf>3</inf>aqueous solution were investigated. As compared with the most studied Li<inf>2</inf>SO<inf>4</inf>aqueous solution, the LiNO<inf>3</inf>aqueous solution displays more favorable physicochemical properties and electrochemical performances as the neutral electrolytes for EDLCs. To be specific, the conductivity of the 5.0 M LiNO<inf>3</inf>aqueous solution can reach up to 154.8 mS cm<sup>−1</sup>at 25 °C, which is nearly two times of the maximum conductivity of 77.6 mS cm<sup>−1</sup>for the 2.0 M Li<inf>2</inf>SO<inf>4</inf>aqueous solution under the identical testing conditions. Even at a concentration as high as 9.0 M, the absolute viscosity of the LiNO<inf>3</inf>aqueous solution is only 2.4, while that of the Li<inf>2</inf>SO<inf>4</inf>aqueous solution achieves 3.0 at the maximum concentration of 2.5 M. Additionally, 5.0 M LiNO<inf>3</inf>aqueous solution exhibits a wide electrochemical potential stability window from −0.9 to 0.9 V (vs. SCE) at the AC electrode, giving rise to an operating cell voltage of 1.8 V, which is comparable to that of 2.0 M Li<inf>2</inf>SO<inf>4</inf>aqueous solution. Further, with the 5.0 M LiNO<inf>3</inf>aqueous solution as the electrolyte, the as-fabricated EDLC delivers an energy density up to 21.16 Wh Kg<sup>−1</sup>at a power density of 100.09 W kg<sup>−1</sup>, which is higher than 18.43 Wh Kg<sup>−1</sup>for the EDLC with the 2.0 M Li<inf>2</inf>SO<inf>4</inf>aqueous electrolyte at the identical power density. Even though the power density reaches as high as 5970 W kg<sup>−1</sup>, the energy density of the EDLC with the 5.0 M LiNO<inf>3</inf>aqueous electrolyte can still remain at 13.1 Wh Kg<sup>−1</sup>, substantially higher than 8.71 Wh Kg<sup>−1</sup>of the EDLC with the 2.0 M Li<inf>2</inf>SO<inf>4</inf>aqueous electrolyte at the same power density. Moreover, the EDLC with the 5.0 M LiNO<inf>3</inf>aqueous electrolyte also holds good cyclic stability. After 10000 charge–discharge cycles at a current density of 1 A g<sup>−1</sup>and a cut-off voltage of 1.8 V, the capacity retention of this EDLC retains more than 90%. These results can render an insight to explore safe, eco-friendly, inexpensive and neutrally aqueous electrolytes for supercapacitors.<br/> ©2018 Elsevier Ltd
语种：
英文
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PREPARATION OF CU2O-REDUCED GRAPHENE NANOCOMPOSITE MODIFIED ELECTRODES TOWARDS ULTRASENSITIVE DOPAMINE DETECTION
作者：
He, Quanguo;Liu, Jun;Liu, Xiaopeng;Li, Guangli* ;Deng, Peihong* ;...
期刊：
Sensors ,2018年18(1):199 ISSN：1424-3210
通讯作者：
Li, Guangli;Deng, Peihong
作者机构：
[He, Quanguo; Li, Guangli; Liang, Jing; Liu, Xiaopeng; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.;[Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Li, Guangli; Deng, Peihong] H;Hunan Univ Technol, Sch Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Cu2O nanoparticles;dopamine detection;electrochemical oxidation;modified electrode;reduced graphene oxide
摘要：
Cu<inf>2</inf>O-reduced graphene oxide nanocomposite (Cu<inf>2</inf>O-RGO) was used to modify glassy carbon electrodes (GCE), and applied for the determination of dopamine (DA). The microstructure of Cu<inf>2</inf>O-RGO nanocomposite material was characterized by scanning electron microscope. Then the electrochemical reduction condition for preparing Cu<inf>2</inf>O-RGO/GCE and experimental conditions for determining DA were further optimized. The electrochemical behaviors of DA on the bare electrode, RGO- and Cu<inf>2</inf>O-RGO-modified electrodes were also investigated using cyclic voltammetry in phosphate-buffered saline solution (PBS, pH 3.5). The results show that the oxidation peaks of ascorbic acid (AA), dopamine (DA), and uric acid (UA) could be well separated and the peak-to-peak separations are 204 mV (AA-DA) and 144 mV (DA-UA), respectively. Moreover, the linear response ranges for the determination of 1 ×10<sup>-</sup><sup>8</sup>mol/L~1 ×10<sup>-</sup><sup>6</sup>mol/L and 1 ×10<sup>-</sup><sup>6</sup>mol/L~8 ×10<sup>-</sup><sup>5</sup>mol/L with the detection limit 6.0 ×10<sup>-</sup><sup>9</sup>mol/L (S/N = 3). The proposed Cu2O-RGO/GCE was further applied to the determination of DA in dopamine hydrochloride injections with satisfactory results.<br/> ©2018 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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MnO_2纳米棒-还原石墨烯复合修饰玻碳电极用于苋菜红的检测
作者：
贺全国;刘晓鹏;邓培红;刘军;李广利;...
期刊：
复合材料学报 ,2018年35(11):3227-3234 ISSN：1000-3851
通讯作者：
Deng, Peihong(dph1975@163.com)
作者机构：
[贺全国; 刘晓鹏; 刘军; 李广利; 梁静] College of Life Science and Chemistry, Hu'nan University of Technology, Zhuzhou;412007, China;[邓培红] Department of Chemistry and Material Science, Hengyang Normal University, Hengyang;421008, China;[贺全国; 刘晓鹏; 刘军; 李广利; 梁静] 412007, China
通讯机构：
[Deng, P.] D;Department of Chemistry and Material Science, Hengyang Normal University, Hengyang, China
关键词：
MnO2纳米棒;还原石墨烯;修饰电极;苋菜红;电催化氧化
摘要：
利用电化学还原法制备MnO_2纳米棒-还原石墨烯复合修饰电极(MnO_2NRs-ErGO/GCE)用于苋菜红的检测。采用SEM和XRD分别对修饰电极材料进行微观形貌和成分结构表征。通过循环伏安法考察了苋菜红在裸电极、ErGO/GCE和MnO_2NRs-ErGO/GCE上的电化学行为,并对测定条件如pH值、富集电位、富集时间进行了优化。结果表明,MnO_2NRs-ErGO增大了GCE电化学活性面积,提高了苋菜红的电化学氧化响应。在最优的检测条件下,MnO_2NRs-ErGO/GCE线性扫描伏安法检测苋菜红线性范围为2.0×10~(-8)~1.0×10~(-5) mol/L和1.0×10~(-5)~ 4.0×10~(-4) mol/L,检测限为1.0×10~(-8) mol/L。MnO_2NRs-ErGO/GCE用于真实饮料样品检测,获得满意结果。
语种：
中文
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纳米Fe_3O_4-还原氧化石墨烯复合修饰玻碳电极的制备及电化学检测多巴胺
作者：
贺全国;梁静;李广利;刘军;刘晓鹏;...
期刊：
复合材料学报 ,2018年35(9):2542-2550 ISSN：1000-3851
通讯作者：
He, Quanguo(hequanguo@126.com)
作者机构：
[贺全国; 梁静; 李广利; 刘军; 刘晓鹏] College of Life Science and Chemistry, Hu'nan University of Technology, Zhuzhou;412000, China;[邓培红] Department of Chemistry and Material Science, Hengyang Normal University, Hengyang;421008, China;[贺全国; 梁静; 李广利; 刘军; 刘晓鹏] 412000, China
通讯机构：
[He, Q.] C;College of Life Science and Chemistry, Hu'nan University of Technology, Zhuzhou, China
关键词：
纳米Fe3O4;还原氧化石墨烯;修饰电极;多巴胺;电分析
摘要：
通过电化学还原法制备纳米Fe_3O_4-还原氧化石墨烯复合修饰玻碳(Fe_3O_4-rGO/GCE)电极,用于多巴胺(DA)的检测。采用SEM、TEM和循环伏安对纳米Fe_3O_4-rGO复合材料进行表征。在pH为7.0的磷酸盐缓冲液(PBS)中,采用循环伏安法研究了DA在纳米Fe_3O_4-rGO/GC上的电化学行为。实验结果表明,较裸GC电极和rGO修饰(rGO/GC)电极,由于纳米Fe_3O_4与rGO的协同作用,纳米Fe_3O_4-rGO/GC显著增大了Fe_3O_4-rGO/GC复合材料电极电化学活性面积和氧化峰电流强度i_(pa)。DA的浓度在6.0×10~(-8)~2.0×10~(-6) mol/L和2.0×10~(-6)~8.0×10~(-5) mol/L范围内,与氧化峰电流强度i_(pa)呈良好的线性关系,检出限达4.0×10~(-9) mol/L(信噪比S/N=3)。抗坏血酸和尿酸共存物几乎不干扰DA的测定,选择性高。Fe_3O_4-rGO/GC修饰电极用于盐酸DA注射液中的DA含量测定,获得结果较好,回收率为97.1% ~103.9%。
语种：
中文
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A highly selective, colorimetric and ratiometric fluorescent probe for NH2NH2 and its bioimaging
作者：
Xu, Hai;Gu, Biao;Li, Yaqian;Huang, Zhen;Su, Wei;...
期刊：
Talanta ,2018年180:199-205 ISSN：0039-9140
通讯作者：
Yin, Peng;Li, Haitao
作者机构：
[Yin, Peng; Duan, Xiaoli; Gu, Biao; Xu, Hai; Li, Yaqian; Li, Haitao; Yin, P; Su, Wei; Huang, Zhen; Yao, Shouzhuo] Hunan Normal Univ, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.;[Gu, Biao] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Coll Hunan Prov, Hengyang 421008, Peoples R China.
通讯机构：
[Yin, P; Li, HT] H;Hunan Normal Univ, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.
关键词：
Addition-cyclization;Living cells;NH(2)NH(2);Ratiometric;Selectivity
摘要：
In this work, we report a novel approach which employed substrate-triggered intramolecular addition-cyclization cascade to develop a highly selective fluorescent probe E)-3-(4-(1H-phenanthro[9,10-d]imidazol-2-yl)phenyl)-1-(2-hydroxylphenyl) prop-2-en-1-one (P-OH) for NH<inf>2</inf>NH<inf>2</inf>. The new sensing mechanism of P-OH for NH<inf>2</inf>NH<inf>2</inf>was investigated in detail by fluorescence spectroscopy,<sup>1</sup>H NMR titration, mass spectrometry and control experiments. The synthesized probe showed ratiometric fluorescent response to NH<inf>2</inf>NH<inf>2</inf>with naked-eye color changes from yellow to colorless. It's noteworthy that this probe displayed high sensitivity and selectivity to NH<inf>2</inf>NH<inf>2</inf>over other species, including primary amines, Cys, Hcy, GSH, HS<sup>-</sup>and HSO<inf>3</inf><sup>-</sup>. Furthermore, the probe can not only detect NH<inf>2</inf>NH<inf>2</inf>in real water samples but also image NH<inf>2</inf>NH<inf>2</inf>in living cells, indicating its potential utility for NH<inf>2</inf>NH<inf>2</inf>sensing in environmental and biological samples.<br/> ©2017 Elsevier B.V.
语种：
英文
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Fe-doped CoSe2 nanoparticles encapsulated in N-doped bamboo-like carbon nanotubes as an efficient electrocatalyst for oxygen evolution reaction
作者：
Li, Jun;Liu, Guiyu;Liu, Beibei;Min, Ziyan;Qian, Dong* ;...
期刊：
Electrochimica Acta ,2018年265:577-585 ISSN：0013-4686
通讯作者：
Qian, Dong;Li, Junhua
作者机构：
[Li, Jun; Liu, Beibei; Qian, Dong; Min, Ziyan; Liu, Guiyu] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.;[Li, Jun; Qian, Dong] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Qian, Dong] C;[Li, Junhua] H;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Fe-doped CoSe2;N-doped carbon nanotube;Composite;Electrocatalyst;Oxygen evolution reaction
摘要：
The utilization of clean and unlimited hydrogen energy is an attractive avenue to tackle the crises of energy and environmental pollution, and exploring high-active, earth-abundant and stable electro-catalysts for the oxygen evolution reaction (OER) is critical to the practicability for electrochemical water splitting. Herein, a nanohybrid with Fe-doped CoSe2 nanoparticles embedded in N-doped bamboo-like carbon nanotubes (denoted as FCS@N-CT) is prepared through simple pyrolysis followed by the selenization employing easily available raw materials for the first time. The received FCS@N-CT shows excellent electrocatalytic comprehensive properties for OER in 1M KOH solution, comparable to and even surpassing the fresh RuO2. Specifically, it requires an overpotential of only 330 mV to deliver a current density of 10 mAcm(-2), and achieves higher current density than that of RuO2 with elevating the potential over 1.652 V vs. reversible hydrogen electrode. More strikingly, FCS@N-CT exhibits a smaller Tafel slope and much better durability than those of RuO2. The remarkable electrocatalytic performance of FCS@N-CT can be ascribed to the unique nanostructure featuring abundant active sites, the favorable conductive network for rapid charge transfer, the synergistic effect between FCS and N-CT, along with the protection of FCS by carbon layers for strong robustness under catalytic conditions. (C) 2018 Elsevier Ltd. All rights reserved.
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英文
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An extremely facile route to Co2P encased in N,P-codoped carbon layers: Highly efficient bifunctional electrocatalysts for ORR and OER
作者：
Li, Jun;Liu, Guiyu;Liu, Beibei;Min, Ziyan;Qian, Dong* ;...
期刊：
International Journal of Hydrogen Energy ,2018年43(3):1365-1374 ISSN：0360-3199
通讯作者：
Qian, Dong;Li, Junhua
作者机构：
[Li, Jun; Liu, Beibei; Qian, Dong; Min, Ziyan; Liu, Guiyu] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.;[Li, Jun; Qian, Dong] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Qian, Dong] C;[Li, Junhua] H;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Co2P;Electrocatalyst;N,P-codoped carbon layer;Oxygen evolution reaction;Oxygen reduction reaction
摘要：
Exploring low-cost, efficacious and stable bifunctional electrocatalysts for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial yet highly challenging to the wide perspective practicability for rechargeable metal−air batteries together with fuel cells and electrochemical water splitting. Herein, we have successfully prepared a novel nanohybrid consisting of Co<inf>2</inf>P nanocores encased in N,P-codoped carbon layers (denoted as Co<inf>2</inf>P@NPC) through an extremely facile and effective pyrolysis route utilizing easily available raw materials. The as-prepared Co<inf>2</inf>P@NPC exhibits excellent bifunctional electrocatalytic performances for both ORR and OER in alkaline solution. For ORR, Co<inf>2</inf>P@NPC shows comparable activity to the commercial 20 wt% Pt/C in terms of the half-wave potential and limited current density under the identical linear sweep voltammetry measurement conditions. Moreover, the ORR durability and methanol tolerance of Co<inf>2</inf>P@NPC are much better than those of 20 wt% Pt/C. As regards OER, Co<inf>2</inf>P@NPC affords lower activity but better stability than the fresh RuO<inf>2</inf>. The high electrocatalytic performances originate from the strong interaction between Co<inf>2</inf>P nanocores and N,P-codoped carbon layers, the high BET surface area and the conductive network formed by the crosslinking of carbon coatings.<br/> ©2017 Hydrogen Energy Publications LLC
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英文
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Understanding the energy level matching relationships between semiconductor photocatalysts and organic pollutants for effective photocatalytic degradations
作者：
Tong, Haixia;Zhan, Xiaojun;Tian, Xiong;Li, Junhua;Qian, Dong* ;...
期刊：
Journal of Colloid and Interface Science ,2018年526:384-391 ISSN：0021-9797
通讯作者：
Wu, Daoxin;Qian, Dong
作者机构：
[Tian, Xiong; Wu, Daoxin; Tong, Haixia; Zhan, Xiaojun] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.;[Tong, Haixia; Li, Junhua; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.
通讯机构：
[Wu, Daoxin; Qian, Dong] C;Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Degradation;Energy level matching;Phenol and its derivatives;Photocatalyst
摘要：
In this work, representative semiconductors CdS, V<inf>2</inf>O<inf>5</inf>, WO<inf>3</inf>and P25 (Degussa TiO<inf>2</inf>consisting of 80 wt% anatase and 20 wt% rutile) were chosen as the photocatalysts, and the common phenol along with its derivatives (p-nitrophenol, p-chlorophenol and hydroquinone) were designated as the probe pollutants. The energy levels of the frontier molecular orbitals (E<inf>HOMO</inf>and E<inf>LUMO</inf>) of organics, and the valence band (VB) and conduction band (CB) energy levels (E<inf>VB</inf>and E<inf>CB</inf>) of photocatalysts were obtained through experiments and calculations. By correlating the photocatalytic activities of photocatalysts for the degradations of the organic pollutants under the irradiation of a 300 W xenon lamp with their above-mentioned energy levels, some new findings can be acquired. To be specific, the more positive E<inf>HOMO</inf>of an organic pollutant leads to its easier photodegradation by photocatalysts. Meanwhile, the more negative VB position for a photocatalyst results in the higher photocatalytic activities for the degradations of organic pollutants. Therefore, the matching correlation between the E<inf>HOMO</inf>of an organic pollutant and the E<inf>VB</inf>of a photocatalyst is of great importance to the efficiency of photocatalytic degradation.<br/> ©2018 Elsevier Inc.
语种：
英文
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Sensitive and Selective Detection of Tartrazine Based on TiO2-Electrochemically Reduced Graphene Oxide Composite-Modified Electrodes
作者：
He, Quanguo;Liu, Jun;Liu, Xiaopeng;Li, Guangli;Deng, Peihong* ;...
期刊：
Sensors ,2018年18(6):1911 ISSN：1424-3210
通讯作者：
Chen, Dongchu;Deng, Peihong
作者机构：
[He, Quanguo; Li, Guangli; Liu, Jun; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.;[He, Quanguo; Deng, Peihong; Liang, Jing; Liu, Xiaopeng] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Li, Guangli; Deng, Peihong; Liang, Jing; Liu, Xiaopeng; Liu, Jun] Hunan Univ Technol, Coll Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.
通讯机构：
[Chen, Dongchu] F;[Deng, Peihong] H;Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;Hunan Univ Technol, Coll Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.
关键词：
electrocatalysis;modified electrode;reduced graphene oxide;tartrazine;titanium dioxide
摘要：
TiO<inf>2</inf>-reduced graphene oxide composite-modified glassy carbon electrodes (TiO<inf>2</inf>–ErGO–GCE) for the sensitive detection of tartrazine were prepared by drop casting followed by electrochemical reduction. The as-prepared material was characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Cyclic voltammetry and second-order derivative linear scan voltammetry were performed to analyze the electrochemical sensing of tartrazine on different electrodes. The determination conditions (including pH, accumulation potential, and accumulation time) were optimized systematically. The results showed that the TiO<inf>2</inf>–ErGO composites increased the electrochemical active area of the electrode and enhanced the electrochemical responses to tartrazine significantly. Under the optimum detection conditions, the peak current was found to be linear for tartrazine concentrations in the range of 2.0 ×10<sup>−8</sup>–2.0 ×10<sup>−5</sup>mol/L, with a lower detection limit of 8.0 ×10<sup>−9</sup>mol/L (S/N = 3). Finally, the proposed TiO<inf>2</inf>–ErGO–GCEs were successfully applied for the detection of trace tartrazine in carbonated beverage samples.<br/> ©2018 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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N-doped carbon coated anatase TiO2 nanoparticles as superior Na-ion battery anodes
作者：
Wang, Jin;Liu, Guiyu;Fan, Kaili;Zhao, Dan;Liu, Beibei;...
期刊：
Journal of Colloid and Interface Science ,2018年517:134-143 ISSN：0021-9797
通讯作者：
Qian, Dong;Li, Junhua
作者机构：
[Wang, Jin; Fan, Kaili; Zhao, Dan; Liu, Beibei; Qian, Dong; Liu, Guiyu] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.;[Yang, Chunming] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Qian, Dong] C;[Li, Junhua] H;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.;Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.
关键词：
Coated;Dopamine;N-doped carbon layer;Sodium ion battery;TiO(2)
摘要：
N-doped carbon coated TiO<inf>2</inf>nanoparticles (TiO<inf>2</inf>@NC) were synthesized through a simple two-step route, in which dopamine was simultaneously utilized as both nitrogen and carbon sources. With TiO<inf>2</inf>@NC applied in the Na-ion battery (SIB) anodes, the continuous and uniform N-doped carbon layer can not only enhance the electrical conductivity of TiO<inf>2</inf>and facilitate the surface pseudocapacitive process, but also serve as a buffer layer to accommodate the volume expansion during the sodiation–desodiation processes. The as-prepared TiO<inf>2</inf>@NC exhibits excellent electrochemical performance when utilized as the SIB anodes, which delivers a remarkably high reversible capacity of 250.2 mAh g<sup>−1</sup>at a rate of 0.25C (84 mA g<sup>−1</sup>) after 200 cycles and still retains 122.1 mAh g<sup>−1</sup>at 10C (3.35 A g<sup>−1</sup>) even after 3000 cycles accompanied with a 95.3% retention of the maximum capacity, outperforming most of the reported TiO<inf>2</inf>/C-based composites as SIB anodes. To our best knowledge, the preparation of TiO<inf>2</inf>@NC with dopamine as both nitrogen and carbon sources and its application in the SIB anodes are reported for the first time.<br/> ©2018 Elsevier Inc.
语种：
英文
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Manganese dioxide Nanorods/electrochemically reduced graphene oxide nanocomposites modified electrodes for cost-effective and ultrasensitive detection of Amaranth
作者：
He, Quanguo;Liu, Jun;Liu, Xiaopeng;Li, Guangli* ;Deng, Peihong* ;...
期刊：
Colloids and Surfaces B: Biointerfaces ,2018年172:565-572 ISSN：0927-7765
通讯作者：
Li, Guangli;Deng, Peihong
作者机构：
[He, Quanguo; Li, Guangli; Liang, Jing; Liu, Xiaopeng; Liu, Jun] Hunan Univ Technol, Coll Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.;[Deng, Peihong; Liu, Xiaopeng] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Li, Guangli; Deng, Peihong] H;Hunan Univ Technol, Coll Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Amaranth detection;MnO(2) nanorods;Modified electrode;Reduced graphene oxide;Second-order derivative linear sweep;voltammogram
摘要：
A novel manganese dioxide nanorods-electrochemically graphene oxide nanocomposites modified glassy carbon electrode (MnO 2 NRs-ErGO/GCE) was developed for the rapid and sensitive detection of Amaranth in foodstuffs. The morphology, structure and composition of MnO 2 NRs, ErGO, and MnO 2 /ErGO were characterized by SEM and XRD. The electrochemical behavior of Amaranth on the bare GCE, ErGO/GCE, and MnO 2 NRs-ErGO/GCE were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The voltammetric conditions (including pH, scan rate, accumulation potential as well as time) were optimized systematically. Due to large electrochemical active area and low charge transfer resistance, the MnO 2 NRs-ErGO/GCE exhibited a great enhancement effect on the oxidation of Amaranth, and significant increased the oxidation peak current i pa (approximately 38-fold increase compared to that of bare GCE). Under the optimum voltammetric conditions, the i pa varied linearly with Amaranth concentration in the range of 0.02 μM–10 μM, and 10 μM–400 μM with a low detection limit of 1.0 nM (S/N = 3). Moreover, satisfactory results were obtained in the analysis of real samples. Together with the merits of rapidness, cost-effectivity, high sensitivity and selectivity, the result suggests the proposed MnO 2 NRs-ErGO/GCE have broad application prospects on the sensitive detection of Amaranth in various real samples. © 2018 Elsevier B.V.
语种：
英文
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Facile synthesis of Pd−Cu@Cu2 O/N-RGO hybrid and its application for electrochemical detection of tryptophan
作者：
Li, Junhua;Jiang, Jianbo;Xu, Zhifeng;Liu, Mengqin;Tang, Siping;...
期刊：
Electrochimica Acta ,2018年260:526-535 ISSN：0013-4686
通讯作者：
Qian, Dong
作者机构：
[Tang, Siping; Liu, Mengqin; Xu, Zhifeng; Li, Junhua] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Li, Junhua; Jiang, Jianbo; Qian, Dong] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Hunan Prov Univ Key Lab Funct Organometall Mat, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.;[Yang, Chunming] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Qian, Dong] C;Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Electrochemical sensor;Hybridization;N-doped reduced graphene oxide;Pd−[email protected]2O;Tryptophan
摘要：
<![CDATA[<ce:abstract xmlns:ce="" xmlns="" xml:lang="en" id="abs0010" view="all" class="author"><ce:section-title id="sectitle0010">Abstract</ce:section-title><ce:abstract-sec id="abssec0010" view="all"><ce:simple-para id="abspara0010" view="all">In this work, the N doping together with Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O hybridization for graphene oxide was achieved by a combined process of hydrothermal treatment and chemical reduction, based on which a novel Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O cubes decorated N-doped reduced graphene oxide (Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O/N-RGO) hybrid was obtained. The synthesized Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O/N-RGO was detailedly characterized by various technologies. The results show that the low Pd loading Cu@Cu<ce:inf loc="post">2</ce:inf>O cubes with the sizes of 300–500?nm are well dispersed on N-RGO sheets, thereby avoiding the serious aggregation and maintaining a large electroactive surface area of the attained hybrid. Benefiting from the synergistic effect of the properties of Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O particles and N-RGO sheets, the Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O/N-RGO modified electrode exhibits remarkable electrocatalytic performance on the oxidation of tryptophan with the enhanced oxidation response and the lowered oxidation overpotential. Under the optimal conditions for the electrochemical detection of tryptophan, the constructed sensor displays a wide linear range (0.01–40.0?μM) and a low detection limit (1.9?nM), outperforming most of the reported hybrid-based sensors. The proposed sensor also features good selectivity, stability and reproducibility, which has been successfully applied for the detection of tryptophan in the urine and milk samples with satisfactory recoveries. All these results suggest that the Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O/N-RGO hybrid could be a promising and convenient material for the fabrication of high-performance electrochemical sensors.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="" xmlns="" class="graphical" id="abs0015" view="all"><ce:section-title id="sectitle0015">Graphical abstract</ce:section-title><ce:abstract-sec id="abssec0015" view="all"><ce:simple-para>Display Omitted</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="" xmlns="" class="author-highlights" xml:lang="en" id="abs0020" view="all"><ce:section-title id="sectitle0020">Highlights</ce:section-title><ce:abstract-sec id="abssec0020" view="all"><ce:simple-para id="abspara0020" view="all"><ce:list id="ulist0010"><ce:list-item id="u0010"><ce:label>?</ce:label><ce:para id="p0010" view="all">The Pd?Cu@Cu<ce:inf loc="post">2</ce:inf>O/N-RGO hybrid was synthesized via a facile wet chemical route.</ce:para></ce:list-item><ce:list-item id="u0015"><ce:label>?</ce:label><ce:para id="p0015" view="all">An enhanced electrocatalytic property of the hybrid has been demonstrated.</ce:para></ce:list-item><ce:list-item id="u0020"><ce:label>?</ce:label><ce:para id="p0020" view="all">The constructed sensor displays super performances for the tryptophan detection.</ce:para></ce:list-item><ce:list-item id="u0025"><ce:label>?</ce:label><ce:para id="p0025" view="all">Advantages include excellent practicability with remarkable reliability.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract>]]>
语种：
英文
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Enhanced electrochemical property of graphite felt@Co-2(OH)(2)CO3 via Ni-P elctrodeposition for flexible supercapacitors
作者：
Shen, Ping;Wang, Zhiyu;Yang, Chunming* ;Zhao, Liping;Liu, Tiancheng;...
期刊：
Electrochimica Acta ,2018年283:1568-1577 ISSN：0013-4686
通讯作者：
Yang, Chunming;Qian, Dong
作者机构：
[Shen, Miao; Liu, Tiancheng; Shen, Ping; Zhao, Liping; Yang, Chunming; Wang, Zhiyu] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Natl & Local United Engn Lab New Petrochem Mat, Changsha 410081, Hunan, Peoples R China.;[Shen, Miao; Liu, Tiancheng; Shen, Ping; Zhao, Liping; Yang, Chunming; Wang, Zhiyu] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Hunan, Peoples R China.;[Li, Junhua; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Qian, Dong] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Yang, Chunming] H;[Qian, Dong] C;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Natl & Local United Engn Lab New Petrochem Mat, Changsha 410081, Hunan, Peoples R China.;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Hunan, Peoples R China.;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.
关键词：
Ni-P;Co-2(OH)(2)CO3;Graphite felt;Coating;All-solid-state flexible supercapacitors
摘要：
In this work, we propose a novel and delicate strategy to significantly boost the supercapacitive performance of graphite felt (GF)@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf> hybrid via a facile Ni−P electrodeposition on the pre-hydrothermally generated GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf> (denoted as GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>@Ni−P). Electrochemical measurements show that the areal specific capacitances of the resulting GF@Ni−P, GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf> and GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>@Ni−P are 118, 1022 and 1360 mF cm<sup>−2</sup> at a current density of 1 mA cm<sup>−2</sup>. Besides, 72.8% of specific capacitance can be maintained upon rising the current density from 1 to 20 mA cm<sup>−2</sup> for GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>@Ni−P, far higher than 47.0% for GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>. More strikingly, the assembled all-solid-state flexible symmetric supercapacitor GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>@Ni−P//KOH//GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>@Ni−P delivers high energy densities of 46.8 Wh kg<sup>−1</sup> at a power density of 0.5 kW kg<sup>−1</sup>, and 20.7 Wh kg<sup>−1</sup> at elevated 5.0 kW kg<sup>−1</sup>, surpassing most of the reported analogues. Moreover, the device holds 92.9% capacitance retention after 2500 cycles at a current density of 10 mA cm<sup>−2</sup>. Such substantially enhanced electrochemical performance of GF@Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf>@Ni−P owes to the improvement of the electronic conductivity by the Ni−P coating and the reinforced synergic effect contributing to the capacitance between the active Co<inf>2</inf>(OH)<inf>2</inf>CO<inf>3</inf> and Ni species including Ni−P and Ni−OH species. To the best of our knowledge, this is the first report on the coating of Ni−P onto inorganic metal compounds for energy-storage/conversion systems.<br/> ©2018 Elsevier Ltd
语种：
英文
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Spinel FeCo2S4 nanoflower arrays grown on Ni foam as novel binder-free electrodes for long-cycle-life supercapacitors
作者：
Deng, Cuifen;Yang, Lishan;Yang, Chunming* ;Shen, Ping;Zhao, Liping;...
期刊：
Applied Surface Science ,2018年428:148-153 ISSN：0169-4332
通讯作者：
Yang, Chunming;Qian, Dong
作者机构：
[Deng, Cuifen; Wang, Chunhui; Shen, Ping; Zhao, Liping; Yang, Chunming; Yang, Lishan; Wang, Zhiyu] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Natl & Local United Engn Lab New Petrochem Mat, Changsha 410081, Hunan, Peoples R China.;[Deng, Cuifen; Wang, Chunhui; Shen, Ping; Zhao, Liping; Yang, Chunming; Yang, Lishan; Wang, Zhiyu] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Hunan, Peoples R China.;[Li, Junhua; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.;[Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Yang, Chunming] H;[Qian, Dong] C;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Natl & Local United Engn Lab New Petrochem Mat, Changsha 410081, Hunan, Peoples R China.;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Hunan, Peoples R China.;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.
关键词：
Array;FeCo 2 S 4;Ni foam;Supercapacitor
摘要：
Spinel FeCo 2 S 4 nanoflower arrays grown on Ni foam (FeCo 2 S 4 @Ni) have been successfully fabricated via a facile hydrothermal sulfurization of the corresponding FeCo 2 O 4 precursor. The results of X-ray diffraction and X-ray photoelectron spectroscopy characterizations affirm that partial Co 2+ /Co 3+ ions in Co 3 S 4 have been substituted by Fe 2+ /Fe 3+ ions to form FeCo 2 S 4 . The obtained FeCo 2 S 4 @Ni exhibits an ultrahigh specific capacitance (1644.07 mF cm −2 at 50 mA cm −2 ) and a supreme cycling stability (∼100% after 10,000 cycles at 50 mA cm −2 ) as binder-free electrodes for supercapacitors. The cycling stability of the fabricated product is the highest among the documented ternary metallic sulfides so far. The excellent supercapacitive performance of FeCo 2 S 4 @Ni emanates from the unique architectures of Fe 2 Co 2 S 4 nanoflower arrays constituted by ultrathin nanoflakes, three-dimensional porous and conductive Ni foam, and solid skeleton of Ni foam for robust connections to the Fe 2 Co 2 S 4 . © 2017 Elsevier B.V.
语种：
英文
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Room-temperature Cu-catalyzed N-arylation of aliphatic amines in neat water
作者：
Wang, Deping* ;Zheng, Yanwen;Yang, Min;Zhang, Fuxing;Mao, Fangfang;...
期刊：
Organic & Biomolecular Chemistry ,2017年15(38):8009-8012 ISSN：1477-0520
通讯作者：
Wang, Deping;Xia, Xiaohong
作者机构：
[Yu, Jiangxi; Zhang, Fuxing; Mao, Fangfang; Wang, Deping; Zheng, Yanwen] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.;[Yang, Min; Xia, Xiaohong] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Wang, Deping; Xia, Xiaohong] H;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.;Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
摘要：
A room-temperature and PTC-free copper-catalyzed N-arylation of aliphatic amines in neat water has been developed. Using a combination of CuI and 6,7-dihydroquinolin-8(5H)-one oxime as the catalyst and KOH as the base, a wide range of aliphatic amines are arylated with various aryl and heteroaryl halides to give the corresponding products in up to 95% yield.
语种：
英文
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Uranium biosorption from aqueous solution by the submerged aquatic plant Hydrilla verticillata
作者：
Yi, Zheng-ji;Yao, Jun* ;Zhu, Mi-jia;Chen, Hui-lun;Wang, Fei;...
期刊：
Water Science and Technology ,2017年75(6):1332-1341 ISSN：0273-1223
通讯作者：
Yao, Jun
作者机构：
[Yao, Jun; Wang, Fei; Yi, Zheng-ji; Zhu, Mi-jia; Chen, Hui-lun] Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Xueyuan Rd 30, Beijing 100083, Peoples R China.;[Yao, Jun; Wang, Fei; Yi, Zheng-ji; Zhu, Mi-jia; Chen, Hui-lun] Univ Sci & Technol Beijing, Natl Int Cooperat Base Environm & Energy, Xueyuan Rd 30, Beijing 100083, Peoples R China.;[Liu, Xing; Yi, Zheng-ji] Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.
通讯机构：
[Yao, Jun] U;Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Xueyuan Rd 30, Beijing 100083, Peoples R China.;Univ Sci & Technol Beijing, Natl Int Cooperat Base Environm & Energy, Xueyuan Rd 30, Beijing 100083, Peoples R China.
关键词：
biosorption;Hydrilla verticillata;isotherm;kinetics;uranium
摘要：
The biosorption characteristics of U(VI) from aqueous solution onto a nonliving aquatic macrophyte, Hydrilla verticillata (dry powder), were investigated under various experimental conditions by using batch methods. Results showed that the adsorption reached equilibrium within 60 min and the experimental data were well fitted by the pseudo-first-order kinetic model. U(VI) adsorption was strongly pH dependent, and the optimum pH for U(VI) removal was 5.5. Isotherm adsorption data displayed good correlation with the Langmuir model, with a maximum monolayer adsorption capacity of 171.52 mg/g. Thermodynamic studies suggested that U(VI) adsorption onto H. verticillata was an exothermic and spontaneous process in nature. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy indicated that the amino and hydroxyl groups on the algal surface played an important role in U(VI) adsorption. The mechanisms responsible for U(VI) adsorption could involve electrostatic attraction and ion exchange. In conclusion, H. verticillata biomass showed good potential as an adsorption material for the removal of uranium contaminants in aqueous solution.
语种：
英文
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Tailoring the porosity of ZnO/ZnFe2O4 composites for photocatalytic applications
作者：
Chen, Mansheng* ;Liu, Dongcheng;Deng, Yifang;Fu, Weiwei;Zou, Huahong;...
期刊：
Ceramics International ,2017年43(17):16027-16031 ISSN：0272-8842
通讯作者：
Chen, Mansheng;Liang, Fupei
作者机构：
[Chen, Mansheng; Deng, Yifang; Fu, Weiwei] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Hengyang 421008, Hunan, Peoples R China.;[Chen, Mansheng; Zou, Huahong; Liang, Fupei; Liu, Dongcheng] Guangxi Normal Univ, Sch Chem & Pharmaceut Sci, Minist Educ China, Key Lab Chem & Mol Engn Med Resources, Guilin 541004, Peoples R China.
通讯机构：
[Chen, Mansheng] H;[Liang, Fupei] G;Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Hengyang 421008, Hunan, Peoples R China.;Guangxi Normal Univ, Sch Chem & Pharmaceut Sci, Minist Educ China, Key Lab Chem & Mol Engn Med Resources, Guilin 541004, Peoples R China.
关键词：
Composite materials;Magnetic materials;Microstructure;X-ray techniques;XPS
摘要：
This paper reported a novel method to synthesize porous ZnO/ZnFe2O4 particles by chemically etching ZnO/ZnO2O4/SO2 composite particles in an alkaline solution, and the porosity of the particles could be tailored by controlling the concentration of SO2 in the ZnO/ZnO2O4/SO2 composites. The photocatalytic performance of both solid and porous ZnO/ZnFe2O4 particles was investigated in methylene blue (MB) degradation reaction. The results showed that the particles with higher porosity displayed a higher catalytic performance, which was indicated by a larger first-order reaction constant (κ) and an improved degradation efficiency (η). Moreover, the magnetization of the particles could be used for the magnetic separation of catalysts after reactions. © 2017
语种：
英文
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Syntheses, Crystal Structures and Biological Activity of the 1D Chain Benzyltin Complexes Based on 2-Oxo-Propionic Acid Benzoyl Hydrazone
作者：
Tan, Yu-Xing;Zhang, Zhi-Jian;Feng, Yong-Lan;Yu, Jiang-Xi;Zhu, Xiao-Ming;...
期刊：
Journal of Inorganic and Organometallic Polymers and Materials ,2017年27(1):342-352 ISSN：1574-1443
通讯作者：
Jiang, Wu-Jiu
作者机构：
[Zhang, Fu-Xing; Jiang, Wu-Jiu; Kuang, Dai-Zhi; Tan, Yu-Xing; Feng, Yong-Lan; Zhang, Zhi-Jian; Yu, Jiang-Xi; Zhu, Xiao-Ming] Hengyang Normal Univ, Coll Hunan Prov, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Jiang, Wu-Jiu] H;Hengyang Normal Univ, Coll Hunan Prov, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Hengyang 421008, Hunan, Peoples R China.
关键词：
Organotin;Hydrazone;Synthesis;Crystal structure;Biological activity
摘要：
Two new 1D Chain benzyltin complexes {[C<inf>6</inf>H<inf>4</inf>(O)C=N–N=C(Me)COO](CH<inf>3</inf>OH)(C<inf>6</inf>H<inf>5</inf>CH<inf>2</inf>)<inf>2</inf>Sn}<inf>n</inf>(1), {[C<inf>6</inf>H<inf>4</inf>(O)C–NH–N=C(Me)COO](C<inf>6</inf>H<inf>5</inf>CH<inf>2</inf>)<inf>3</inf>Sn}<inf>n</inf>(2) were synthesized by the reactions of 2-oxo-propionic acid benzoyl hydrazone with dibenzyltin dichloride or tribenzyltin chloride, respectively. The two complexes were characterized by FT-IR,<sup>1</sup>H,<sup>13</sup>C and<sup>119</sup>Sn NMR spectra, elemental analysis, X-ray single crystal diffraction and TGA. In vitro antitumor activities of both complexes were evaluated by the 3-(4,5-dimethylthiazoly-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay against three human cancer cell lines (NCI-H460, HepG2, MCF7) and human cell line (HL7702). The 1 exhibited strong antitumor activity than 2, then it was expected after further chemical optimization of candidate compounds as anti-cancer drugs. The interaction between complexes and calf thymus DNA were studied by EB fluorescent probe, the interaction of 1 and 2 with calf thymus DNA were intercalation and electrostatic attraction. ©2016, Springer Science+Business Media New York.
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英文
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Syntheses, Crystal Structures, and Luminescence Properties of Co(II), Ni(II) and Zn(II) Complexes with 4'-(4-(Imidazol-1-Yl)phenyl)-2,2':6',2aEuro(3)-Terpyridine
作者：
Fu, W. W.* ;Huang, Q.;Liu, S. T.;Wu, W. J.;Shen, J. R.;...
期刊：
Russian Journal of Coordination Chemistry ,2017年43(10):670-678 ISSN：1070-3284
通讯作者：
Fu, W. W.
作者机构：
[Fu, W. W.; Huang, Q.; Shen, J. R.; Li, S. H.; Wu, W. J.; Liu, S. T.] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Hunan Prov Coll, Hengyang 421008, Peoples R China.
通讯机构：
[Fu, W. W.] H;Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat, Hunan Prov Coll, Hengyang 421008, Peoples R China.
关键词：
4'-(4-(imidazol-1-yl)phenyl)-2,2':6',2″-terpyridine;Co(II) complex;Ni(II) complex;Zn(II) complex;crystal structure;luminescence
摘要：
Three coordination complexes [Co(Imphtpy)<inf>2</inf>]Cl<inf>2</inf>·CHCl<inf>3</inf>·3H<inf>2</inf>O (I), [Ni(Imphtpy)<inf>2</inf>]Cl<inf>2</inf>·CHCl<inf>3</inf>·C<inf>2</inf>H<inf>5</inf>OH (II) and [Zn(Imphtpy)]Cl<inf>2</inf>(III) (Imphtpy = 4'-(4-(imidazol-1-yl)phenyl)2,2':6',2″-terpyridine) have been synthesized and characterized by IR, elemental analysis and X-ray single crystal diffraction (СIF files CCDC nos. 1012055 (I), 1011708 (II), 1011709 (III)). Complexes I and II are isomorphism except for some solvent molecules. In the crystal, both face-to-face interactions between pyridyl ring, imidazole rings and phenyl rings and hydrogen bonds facilitate the construction of 3D networks. There are no hydrogen bonds in III and the packing of discrete neutral molecules were ascribed to face-to-face interactions and van der Waals forces. The luminescence properties of three complexes have been investigated in the solid state at room temperature. ©2017, Pleiades Publishing, Ltd.
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英文
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