A cost-saving preparation of nickel nanoparticles/nitrogen-carbon nanohybrid as effective advanced electrode materials for highly sensitive tryptophan sensor
作者：
Deng, Peihong;Nie, Xue;Wu, Yiyong;Tian, Yaling;Li, Junhua;...
期刊：
Microchemical Journal ,2021年160(Pt.B):105744 ISSN：0026-265X
通讯作者：
He, Quanguo
作者机构：
[He, Quanguo; Deng, Peihong; Nie, Xue; Li, Junhua] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Wu, Yiyong] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.
通讯机构：
[He, Quanguo] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.
关键词：
Nickel nanoparticles;Nitrogen-doped carbon;Formamide;Tryptophan;Electrochemical sensor
摘要：
Here we report a facile and cost-effective preparation of nickel nanoparticle S/Nitrogen-carbon nanohybrid (Ni NPS/N-C) based on formamide condensation and carbonization, used for highly sensitive and selective electrochemical determination of tryptophan (Trp) in practical samples. The crystallographic phase, surface morphology, elemental distribution, and chemical state of the Ni NPS/N-C nanohybrid were analyzed by XRD, SEM, TEM, EDS, XPS, FTIR, TGA and Raman spectra. The results show that high content of Ni NPs (6.62 wt%) were distributed in the nanohybrid, and a large number of bamboo-like nanotubes were formed during pyrolysis, which dramatically increases the specific surface area, and remarkably promotes the electrical conductivity as well as the catalytic activity of the nanohybrid. The electrochemical behavior of Trp was investigated on the nanohybrid modified carbon paste electrode (Ni NPS/N-C/CPE) and the measurement parameters were optimized. As expected, the modified electrode can remarkably enhance the electrochemical oxidation signal of Trp. Under the optimal experimental conditions, a linear relationship in the range of 0.01–20 μM and 20–80 μM for Trp was established with detection limit of 5.7 nM (S/N = 3). Finally, the proposed sensor was practically applied by evaluation and determination of Trp from various sourcing samples including human serum and pharmaceutical samples. © 2020 Elsevier B.V.
语种：
英文
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Highly sensitive electrochemical sensor for tyrosine detection using a sub-millimeter electrode
作者：
Deng, Peihong;Xiao, Jingyun;Feng, Jinxia;Tian, Yaling;Wu, Yiyong;...
期刊：
Microchemical Journal ,2021年165:106106 ISSN：0026-265X
通讯作者：
Peihong Deng<&wdkj&>Quanguo He
作者机构：
[Deng, Peihong; Li, Junhua] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Wu, Yiyong; Xiao, Jingyun; Feng, Jinxia] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.
通讯机构：
[Peihong Deng] D;[Quanguo He] S;School of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China<&wdkj&>Department of Chemistry and Material Science, Hengyang Normal University, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials of Hunan Provincial Universities, Hengyang 421008, China
关键词：
Acetylene black;Submillimeter electrode;Electrochemical oxidation;Tyrosine sensor;Reduced graphene oxide
摘要：
In recent years, small-sized electrodes have drawn widespread attraction in electroanalysis due to high sensitivity, rapid response and low cost. Hereby, a sub-millimeter paste electrode with inner diameter of 0.8 mm was prepared by combining the excellent properties of reduced graphene oxide (rGO) and acetylene black (AB), and the electrochemical behavior of tyrosine (Tyr) on the modified electrode (denoted as rGO/ABPE) was investigated in detail. The electrochemical responses obtained on the sub-millimeter rGO/ABPE were compared with that obtained on a conventional size electrode with diameter of 3 mm. The results showed that the 0.8 mm one has better performance than that of 3 mm. Compared with the paste electrode made of graphite powder, the oxidation peak current of Tyr increased significantly due to the synergistic effect of rGO and AB. Under the optimized experimental conditions, the calibration curve of Tyr showed a linear relationship between 0.1 and 100 μM (R = 0.9995) with good sensitivity of 3.314 μA μM−1 cm−2, and the detection limit was 0.06 μM. By comparison with conventional size electrode, the detection of Tyr on the sub-millimeter electrode shows higher sensitivity, wider linear range and lower detection limit. In addition, the excellent reproducibility, stability and selectivity of the sub-millimeter rGO/ABPE make it suitable for Tyr analysis in both food and biological samples. © 2021 Elsevier B.V.
语种：
英文
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黑老虎果皮中总黄酮提取工艺研究
作者：
贺灵芝;李俊华;梁忠厚
期刊：
衡阳师范学院学报 ,2020年41(03):82-86 ISSN：1673-0313
作者机构：
湖南环境生物职业技术学院医药技术学院,湖南衡阳 421005;衡阳师范学院,功能金属有机化合物湖南省重点实验室,湖南衡阳 421008;[贺灵芝; 梁忠厚] 湖南环境生物职业技术学院;[李俊华] 衡阳师范学院
关键词：
黑老虎;超声提取;总黄酮;药用价值
摘要：
以黑老虎新鲜果皮为原料,采用超声波法提取原料的总黄酮并利用紫外可见分光光度法测定其总黄酮的含量.通过单因素实验分别研究了超声温度、超声时间、乙醇浓度、料液比和超声功率等工艺条件对提取率的影响.在单因素实验的基础上进行正交实验,得出最佳提取工艺条件为超声温度60 ℃、超声时间35 min、乙醇体积分数80％、料液比1∶25和超声功率180 W,此条件下总黄酮提取率为6.69％.进一步比较发现,基于仿生态黑老虎提取的总黄酮含量高于组培黑老虎中所提取的总黄酮含量.该研究有助于开发黑老虎果皮的中药利用价值.
语种：
中文
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复合修饰电极同时测定2,7-萘二酚与双酚A
作者：
贺灵芝;旷文安;李俊华
期刊：
科技创新与生产力 ,2020年(3):51-54 ISSN：1674-9146
作者机构：
湖南环境生物职业技术学院医药技术学院,湖南 衡阳 421005;南华大学附属第一医院,湖南 衡阳 4210012;衡阳师范学院功能金属有机化合物湖南省重点实验室,湖南 衡阳 421008;[贺灵芝] 湖南环境生物职业技术学院;[李俊华] 衡阳师范学院
关键词：
电化学传感器;7-萘二酚;石墨烯;同时测定
摘要：
采用超声波法制备了β-环糊精/石墨烯纳米复合材料(CD-GN),通过红外光谱、紫外-可见分光光度法和扫描电镜分析,表明CD成功地附着在GN上。将CD-GN修饰玻碳电极用于2,7-萘二酚和双酚A的同时电化学测定,结果表明:修饰电极对2,7-萘二酚和双酚A有更强的电催化氧化和富集作用。在优化条件下,2,7-萘二酚和双酚A在3.0×10^-7~2.5×10^-5mol/L和5.0×10^-8~1.0×10^-4mol/L浓度范围内分别与其峰电流成明显线性关系,检出限低。在实际水样检测中回收率为97.0%~102.8%。
语种：
中文
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A Simple Ni-based Metal–organic Framework as Catalyst for Dye-sensitized Photocatalytic H2 Evolution from Water Reduction
作者：
Liu, Xing* ;Lv, Xujiao;Lai, Hua;Peng, Gang;Yi, Zhengji;...
期刊：
Photochemistry and Photobiology ,2020年96(6):1169-1175 ISSN：0031-8655
通讯作者：
Liu, Xing
作者机构：
[Liu, Xing; Lai, Hua; Peng, Gang; Li, Junhua; Lv, Xujiao; Yi, Zhengji] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang, Peoples R China.;[Liu, Xing; Lai, Hua; Peng, Gang; Li, Junhua; Yi, Zhengji] Hengyang Normal Univ, Coll Hunan Prov, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang, Peoples R China.;[Liu, Xing; Lai, Hua; Peng, Gang; Li, Junhua; Yi, Zhengji] Hengyang Normal Univ, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang, Peoples R China.
通讯机构：
[Liu, Xing] H;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang, Peoples R China.;Hengyang Normal Univ, Coll Hunan Prov, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang, Peoples R China.;Hengyang Normal Univ, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang, Peoples R China.
关键词：
Eosin Y;metal-organic frameworks;nickel;photocatalytic H2 evolution
摘要：
Metal–organic frameworks (MOF) are recently developed coordination porous materials, and their unique structures are very conducive to catalytic reactions. In this paper, p-benzenedicarboxylic acid (PBA)-Ni2+ MOF materials (denoted as PBA-Ni-x, where x represents the initial ratio of PBA to Ni2+) were synthesized by a hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and N2 gas adsorption. H2 gas was produced using the synthesized MOF as a photocatalyst and Eosin Y as a photosensitizer. The dependence of the special surface area and thickness of the nanosheets of Ni-MOF on the initial ratio of PBA to Ni2+ (PBA/Ni2+) was investigated. The BET surface areas of PBA-Ni-1 PBA-Ni-2 and PBA-Ni-3 are 11.00, 24.61 and 13.04m2g−1, respectively. And the thicknesses of nanosheets are approximately 600–1000, 200–500 and 300–700nm. Among the three materials, PBA-Ni-2 has the thinnest sheet-like structure and largest surface area. Thus, it displays the highest H2 evolution rate of 20.0μmolh−1. The noble-metal-free hydrogen production system is valuable for the application of MOF materials in photocatalytic water splitting. © 2020 American Society for Photobiology
语种：
英文
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吡啶桥联的双钌乙炔端基化合物及其制备方法和应用
发明/设计人：
欧亚平;庾江喜;朱小明;李俊华
申请/专利权人：
衡阳师范学院
申请/专利号：
CN202010128953.1
申请时间：
2020-02-28
公开号：
CN111205336A
公开时间：
2020-05-29
主申请人地址：
421000 湖南省衡阳市雁峰区黄白路165号
摘要：
吡啶桥联的双钌乙炔端基化合物，涉及光电材料技术领域，其结构通式为：其中，Py为中的一种，R为H或CH3，R’为H、F、CH3、OCH3、CHO、COOEt、CN中的一种。该化合物以吡啶及其衍生物为共轭桥链，以金属钌为氧化还原活性端基，经电化学方法测试，该化合物呈现了两次连续的单电子氧化还原过程，表现出较好的电子相互作用(耦合)，具有较好电荷的传输性能，在分子导线领域具备较好潜在的应用前景。
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CoFe普鲁士蓝类似物修饰电极及其在同时测定多巴胺和5-羟色胺含量中的应用
发明/设计人：
李俊华;吴倩;刘兴;欧亚平;毛祖兴;...
申请/专利权人：
衡阳师范学院
申请/专利号：
CN201911320532.2
申请时间：
2019-12-19
公开号：
CN111060573A
公开时间：
2020-04-24
主申请人地址：
421008 湖南省衡阳市雁峰区黄白路165号
摘要：
本发明涉及电极材料制备和电化学分析技术领域，具体公开了CoFe普鲁士蓝类似物修饰电极及其在同时测定多巴胺和5‑羟色胺含量中的应用。所述的CoFe普鲁士蓝类似物修饰电极通过如下方法制备得到：S1.制备CoFe普鲁士蓝类似物材料；S2.将所述的CoFe普鲁士蓝类似物在有机溶剂中超声分散制成分散液；S3.取分散液滴加在玻碳电极表面，干燥后即得CoFe普鲁士蓝类似物修饰电极。利用CoFe普鲁士蓝类似物修饰电极能够同时测定样品中多巴胺和5‑羟色胺的含量；且具有检测信号区分度大、灵敏度高和抗干扰性强等优点。
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一种双功能催化剂及其制备与应用
发明/设计人：
李俊华;唐潘婷;唐斯萍;许志锋;刘梦琴;...
申请/专利权人：
衡阳师范学院
申请/专利号：
202010119429.8
申请时间：
2020.02.26
公开号：
111277312B
主申请人地址：
湖南省衡阳市雁峰区黄白路165号
摘要：
本发明公开了一种双功能催化剂及其制备方法与应用。所述的双功能催化剂的制备方法包含如下步骤：(1)称取反应物质量：称取0.1～0.2gCo(CH3OO)2·4H2O、0.05～0.1gNi(CH3OO)2·4H2O和0.1～0.2gCH4N2S；(2)反应溶剂的配制：分别移取5～10mL的N,N‑二甲基甲酰胺溶剂和5～10mL的去离子水将步骤(1)中的反应物溶解，得反应混合溶液。(3)反应步骤：将反应混合溶液移至高压反应釜中，密封反应釜放于180～220℃下反应8～16h，然后洗涤分离产物即得所述的双功能催化剂。利用本发明所述的双功能催化剂制备得到的修饰电极具有两种用途，既可在负电位下对过氧化氢进行定量检测，也可以在正电位下对左旋多巴进行定量检测，该催化剂的电化学检测应用具有灵敏度高、选择性好以及检出限低的优势。
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一种纳米球状硫化银高分散负载的氮掺杂石墨烯复合材料、修饰电极及其应用
发明/设计人：
李俊华;陈慧洁;许志锋;刘梦琴;刘兴;...
申请/专利权人：
衡阳师范学院
申请/专利号：
CN201911320508.9
申请时间：
2019-12-19
公开号：
CN111099651A
公开时间：
2020-05-05
主申请人地址：
421008 湖南省衡阳市雁峰区黄白路165号
摘要：
本发明公开了一种纳米球状硫化银高分散负载的氮掺杂石墨烯复合材料、修饰电极及其应用。所述复合材料的制备方法为：(1)将AgNO3和S粉分别溶于乙二醇，再将AgNO3溶液缓慢滴入S粉溶液中，随后加入聚乙烯吡咯烷酮(PVP)，将混合液置于反应釜中反应得纳米球状硫化银；(2)取纳米球状硫化银和氮掺杂石墨烯分别加入N,N‑二甲基甲酰胺中形成分散液，硫化银分散液和氮掺杂石墨烯分散液按照一定体积比例超声混合、离心干燥后得纳米球状硫化银高分散负载的氮掺杂石墨烯复合材料。由本发明所述的纳米球状硫化银高分散负载的氮掺杂石墨烯复合材料制备的化学修饰电极能用于中药材中异槲皮苷的快速检测，且具有检测范围宽、灵敏度高、操作简便等优点。
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一种Ag-CuS核壳微球负载的氮掺杂石墨烯复合材料及其制备方法与应用
发明/设计人：
李俊华;游汝芝;唐斯萍;许志锋;刘梦琴;...
申请/专利权人：
衡阳师范学院
申请/专利号：
202010108443.8
申请时间：
2020.02.21
公开号：
111293273B
主申请人地址：
湖南省衡阳市雁峰区黄白路165号
摘要：
本发明公开了一种Ag‑CuS核壳微球负载的氮掺杂石墨烯复合材料及其制备方法与应用。所述复合材料的制备方法包含如下步骤：将二水氯化铜和硫脲中加入去离子水和N‑N‑二甲基甲酰胺的混合溶液中，磁力搅拌后在反应釜中反应，即得CuS微球；将CuS微球分散在去离子水中，加入搅拌条件下加葡萄糖得CuS分散液；向CuS分散液中加入配制好的银氨溶液，搅拌、静置后分离并洗涤产物即得Ag‑CuS核壳微球；取Ag‑CuS核壳微球加入到N,N‑二甲基甲酰胺分散的氮掺杂石墨烯中，得Ag‑CuS核壳微球负载的氮掺杂石墨烯复合材料。由本发明所述的Ag‑CuS核壳微球负载的氮掺杂石墨烯复合材料制备的化学修饰电极能用于食品中酪氨酸的快速检测，且具有检出限低、稳定性好、操作简便等优点。
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Carbon nanotubes-intercalated Co-N-C as a robust sulfur host for lithium-sulfur batteries
作者：
Liu, Beibei;Fan, Kaili;Li, Junhua;Liu, Guiyu;Liu, Youcai* ;...
期刊：
Materials Research Bulletin ,2020年121:110625 ISSN：0025-5408
通讯作者：
Liu, Youcai;Han, Kai;Qian, Dong
作者机构：
[Liu, Youcai; Liu, YC; Han, Kai; Qian, Dong; Fan, Kaili; Liu, Beibei; 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.;[Yang, Chunming] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China.;[Tong, Haixia] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Liu, YC; Han, K; Qian, D] C;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Hunan, Peoples R China.
关键词：
Carbon carbon composites;Carbon nanotubes;Decay (organic);Doping (additives);Efficiency;Lithium batteries;Lithium compounds;Zeolites;Battery performance;Coulombic efficiency;Electrochemical performance;Electroconductivity;Imidazolate;Initial discharge capacities;Metallic cobalt;N-doped;Lithium sulfur batteries
摘要：
We design a novel sulfur host composite with carbon nanotubes (CNTs) intercalated to the polyhedrons consisting of metallic cobalt and N-doped carbon derived from zeolite imidazolate framework-67 (Co-N-C/CNTs). As compared with the pristine Co-N-C, the intercalated CNTs can lead to significant enhancements of specific surface area, sulfur loading and electroconductivity, thus pronouncedly improving the overall Li-S battery performance. More specifically, the Co-N-C/CNTs/S cathode delivers an initial discharge capacity of 1440.6 mA h g−1 at 0.1C while 1104.4 mA h g−1 for Co-N-C/S. At 1C, the capacity decay rate of Co-N-C/CNTs/S is 0.09% per cycle after 500 cycles with the coulombic efficiency more than 98.2%, while 0.14% per cycle with the coulombic efficiency of 96.4% for Co-N-C/S. Evidently, the interpenetration of CNTs into the sulfur host materials is a simple and effective strategy to promote the Li-S battery performance. © 2019 Elsevier Ltd
语种：
英文
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一种Cu-MOFs负载的氮掺杂石墨烯复合材料及其制备方法和应用
发明/设计人：
李俊华;舒象翔;刘梦琴;许志锋;唐斯萍;...
申请/专利权人：
衡阳师范学院
申请/专利号：
202010108442.3
申请时间：
2020.02.21
公开号：
111293273B
主申请人地址：
湖南省衡阳市雁峰区黄白路165号
摘要：
本发明公开了一种Cu‑MOFs负载的氮掺杂石墨烯复合材料及其制备方法和应用。所述Cu‑MOFs负载的氮掺杂石墨烯复合材料的制备方法，其包含如下步骤：(1)称取三水硝酸铜分散在混合溶剂中，搅拌后加入均苯三甲酸，倒进反应釜中反应得到Cu‑MOFs粉末；(2)称取氮掺杂石墨烯分散在N,N‑二甲基甲酰胺中得氮掺杂石墨烯分散液；(3)将Cu‑MOFs粉末加入到氮掺杂石墨烯分散液超声均匀后得Cu‑MOFs负载的氮掺杂石墨烯复合材料。由该材料制备得到的修饰电极用于芦丁的检测，具有灵敏度高、检出限低、操作简单和便于快速检测等优点。
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一种Ag-MnO2纳米线复合材料及其制备方法与在检测胸腺嘧啶含量中的应用
发明/设计人：
李俊华;阳钰宁;袁煜林;吴鹭鹰;贺灵芝;...
申请/专利权人：
衡阳师范学院
申请/专利号：
202010808278.7
申请时间：
2020.08.12
公开号：
111962683B
公开时间：
2020.11.24
主申请人地址：
湖南省衡阳市雁峰区黄白路165号
摘要：
本发明公开了一种Ag‑MnO2纳米线复合材料及其制备方法与在检测胸腺嘧啶含量中的应用。所述的Ag‑MnO2纳米线复合材料的制备方法，包含如下步骤：将KMnO4和MnSO4混合，加水搅拌后，在130～150℃下反应10～20h，分离产物得MnO2纳米线；取MnO2纳米线加水搅拌，然后再加入葡萄糖搅拌溶解得溶液A；在氨水中加入AgNO3溶液直至生成的沉淀物又溶解，得溶液B；将溶液B加入溶液A中，搅拌均匀后静置，分离产物即得Ag‑MnO2纳米线复合材料。利用本发明所述的Ag‑MnO2纳米线复合材料制备得到的修饰电极对胸腺嘧啶的检测具有灵敏度高、选择性好和检出限低的优点。
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Oxidant-assisted direct-sulfidization of nickel foam toward a self-supported hierarchical Ni3S2@Ni electrode for asymmetric all-solid-state supercapacitors
作者：
Shen, Miao;Liu, Jinlong;Liu, Tiancheng;Yang, Chunming* ;He, Yaxin;...
期刊：
Journal of Power Sources ,2020年448:227408 ISSN：0378-7753
通讯作者：
Yang, Chunming;Qian, Dong
作者机构：
[Shen, Miao; Liu, Tiancheng; He, Yaxin; Yang, Chunming; Li, Zhouli] Hunan Normal Univ, Coll Chem & Chem Engn, Natl & Local Joint Engn Lab New Petrochem Mat & F, Changsha 410081, Peoples R China.;[Shen, Miao; Liu, Tiancheng; He, Yaxin; Yang, Chunming; Li, Zhouli] Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Peoples R China.;[Liu, Jinlong; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Peoples R China.;[Liu, Jinlong] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England.;[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：
[Yang, Chunming] H;[Qian, Dong] C;Hunan Normal Univ, Coll Chem & Chem Engn, Natl & Local Joint Engn Lab New Petrochem Mat & F, Changsha 410081, Peoples R China.;Hunan Normal Univ, Coll Chem & Chem Engn, Minist Educ China, Key Lab Chem Biol & Tradit Chinese Med Res, Changsha 410081, Peoples R China.;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Peoples R China.
关键词：
Capacitance;Electric discharges;Electrodes;Electrolytes;Nickel;Oxidants;Redox reactions;Supercapacitor;Temperature;All-solid state;All-solid-state supercapacitors;Electrochemical materials;Energy storage applications;High specific capacitances;Nickel foam;Sulfidization;Supercapacitive behavior;Nickel compounds
摘要：
In this work, we demonstrate, for the first time, a low-temperature direct-sulfidization of nickel foam (NF) assisted with oxidant K2S2O8 to fabricate a novel self-supported hierarchical porous Ni3S2@NF electrode for supercapacitors. The resultant Ni3S2@NF electrode exhibits a high specific capacitance of 2519.5 mF cm−2 at a current density of 1.0 mA cm−2, and a rate capability of 68.5% over a current density range of 1–20 mA cm−2. At the same time, the retention of areal specific capacitance amounts to ~100% of its initial capacitance at 20 mA cm−2 after 4000 consecutive charge−discharge cycles. Moreover, an asymmetric all-solid-state supercapacitor device Ni3S2@NF//activated carbon (AC)@NF has been assembled. Remarkably, this device can afford an energy density of 32.0 Wh kg−1 at a power density of 210.8 W kg−1 accompanied with excellent electrochemical cyclic stability. Such outstanding supercapacitive behavior of Ni3S2@NF can be credited to its unique porous interpenetrating architecture and the robust contact of Ni3S2 and NF, which can ensure rapid ion and electron transfers for redox reactions as well as tightly contacts among active component, substrate, and electrolyte. The direct-sulfidization of metals assisted with oxidants can offer a general, scalable, and viable protocol to fabricate high-performance electrochemical materials for energy-storage applications. © 2019 Elsevier B.V.
语种：
英文
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Novel hierarchical sea urchin-like Prussian blue@palladium core–shell heterostructures supported on nitrogen-doped reduced graphene oxide: Facile synthesis and excellent guanine sensing performance
作者：
Li, Junhua;Jiang, Jianbo;Zhao, Dan;Xu, Zhifeng;Liu, Mengqin;...
期刊：
Electrochimica Acta ,2020年330:135196 ISSN：0013-4686
通讯作者：
Qian, Dong
作者机构：
[Liu, Xing; Liu, Mengqin; Xu, Zhifeng; Li, Junhua] Hengyang Normal Univ, Coll Chem & Mat Sci, Hunan Prov Univ Key Lab Funct Organometall Mat, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Li, Junhua; Zhao, Dan; Qian, Dong] Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.;[Jiang, Jianbo] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China.;[Tong, Haixia] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Qian, Dong] C;Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.
关键词：
Prussian blue;Palladium;Morphology-controlled synthesis;Electrochemical detection;Guanine
摘要：
Aiming at substantially improving the electrochemical sensing performance for guanine, we bring out a novel high-efficiency electrocatalyst composed of hierarchical sea urchin-like Prussian blue@palladium core-shell heterostructures supported on nitrogen-doped reduced graphene oxide (PB-U@Pd/N-RGO). The said PB-U@Pd/N-RGO was synthesized by a new and facile wet-chemistry method without using any surfactant and template. More impressively, we demonstrate a new strategy for morphology-controlled synthesis of Prussian blue via simply tuning the ratio of N,N'-dimethyl formamide and H2O in the mixed solvent. In-depth electrochemical characterizations demonstrate the superior electrocatalytic performance of PB-U@Pd/N-RGO toward the oxidation of guanine, which benefits from the synergistic effect of component materials and its unique core-shell heterostructure. Consequently, the constructed PBU@Pd/N-RGO-based electrochemical sensor displays superb comprehensive performance for the guanine assay. To be specifical, the developed sensor exhibits wide detection range (0.01-85.0 mu W), low detection limit (2.6 nM), good reproducibility, long-term stability, high sensitivity and selectivity together with acceptable recovery (97.0-104.0%) for the assay of guanine in biological samples. Such outstanding comprehensive performance is amongst the top of reports for the electrochemical sensing of guanine, promising practical applications in biosensing fields. (C) 2019 Elsevier Ltd. All rights reserved.
语种：
英文
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信息化背景下案例教学在《天然药物化学》中的探究与实践
作者：
贺灵芝;李俊华
期刊：
科技创新导报 ,2020年17(13):216-217 ISSN：1674-098X
作者机构：
湖南环境生物职业技术学院医药技术学院 湖南衡阳 421005;衡阳师范学院 湖南衡阳 421008;[贺灵芝] 湖南环境生物职业技术学院;[李俊华] 衡阳师范学院
关键词：
案例教学;信息化;天然药物化学
摘要：
教师在药学专业课程教学过程中有必要融入教学案例,本文以药学专业课程《天然药物化学》为例,从教学分析、教学设计、教学过程和教学反思四个方面介绍如何在信息化背景下将教学案例融入教学过程,提高课程建设水平、增强学生学习主动性和积极性,实现全程育人、全方位育人。
语种：
中文
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N-doped bamboo-like CNTs combined with CoFe–CoFe2O4 as a highly efficient electrocatalyst towards oxygen evolution
作者：
Xu, Deyao;Liu, Beibei;Liu, Guiyu;Su, Kanda;Yang, Chunming;...
期刊：
International Journal of Hydrogen Energy ,2020年45(11):6629-6635 ISSN：0360-3199
通讯作者：
Qian, Dong;Li, Junhua
作者机构：
[Liu, Beibei; Su, Kanda; Qian, Dong; Liu, Guiyu; Xu, Deyao] Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Peoples R China.;[Li, Junhua; Xu, Deyao] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Yang, Chunming] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Peoples R China.;[Tong, Haixia] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Peoples R China.
通讯机构：
[Qian, Dong] C;[Li, Junhua] H;Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, 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：
Bamboo;Binary alloys;Carbon nanotubes;Doping (additives);Electrocatalysts;Oxygen;Oxygen evolution reaction;Potassium hydroxide;Slope stability;Bamboo-like carbon nanotubes;CoFe2O4;Electrocatalytic performance;Electrochemical surface area;Long term stability;Overpotential;Oxygen evolution;Synergistic effect;Cobalt
摘要：
In this work, we developed a novel hybrid with N-doped bamboo-like carbon nanotubes combined with the CoFe alloy and its oxide (denoted as CoFe–CoFe2O4/N-CNTs) via an extremely facile one-step pyrolysis method. When applied as an electrocatalyst towards OER in 1.0 M KOH solution, CoFe–CoFe2O4/N-CNTs exhibits a small overpotential of 334 mV to afford a current density of 10 mA cm−2 associated with a low Tafel slope of 80 mV dec−1 and long-term stability. The remarkable OER electrocatalytic performance of CoFe–CoFe2O4/N-CNTs is mainly attributed to the synergistic effect between CoFe and CoFe2O4 as well as the increased active sites resulting from the introduction of N-CNTs. More impressively, the introduction of Fe can significantly cut down the usage of relatively toxic and expensive Co accompanied with the dramatic enhancement of OER electrocatalytic performance originating from the robust synergistic effect between Co and Fe. © 2020 Hydrogen Energy Publications LLC
语种：
英文
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High sensitive voltammetric sensor for nanomolarity vanillin detection in food samples via manganese dioxide nanowires hybridized electrode
作者：
Tian, Yaling;Deng, Peihong* ;Wu, Yiyong;Liu, Jun;Li, Junhua;...
期刊：
Microchemical Journal ,2020年157(Pt.A):104885 ISSN：0026-265X
通讯作者：
He, Quanguo;Deng, Peihong
作者机构：
[Li, Guangli; He, Quanguo; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong; Li, Junhua; Deng, PH; He, QG] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong; Li, Junhua; Deng, PH; He, QG] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong; Li, Junhua; Deng, PH; He, QG] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[He, Quanguo; Deng, PH; He, QG] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Electrochemical sensor;Vanillin;Manganese dioxide nanowires;Graphene;Food sensor
摘要：
Vanillin is widely used as a flavoring and fragrance enhancer in foods. Rapid detection of vanillin is of vital significance and necessity for food safety. In this work, a sensitive voltammetric sensor to detect trace vanillin of nanomolarity in food samples was demonstrated by using manganese dioxide nanowires hybridized electrode. Firstly, a modified glassy carbon electrode was prepared using manganese dioxide nanowires functionalized reduced graphene oxide as a modifier (MnO2 NWs-rGO/GCE). Then the MnO2 NWs-rGO/GCE were characterized by scanning electron microscopy, X-ray diffraction (XRD) and cyclic voltammetry (CV). Vanillin's electrochemical behavior in the solution of 0.1 M H2SO4 was studied in detail. The results showed that the modified electrode had an electrocatalytic activity for vanillin oxidation. The adsorption capacity (Γs) and standard rate constant (ks) on the modified electrode were calculated by chronocoulometry (CC). Subsequently, after systematic investigation of second derivative linear sweep voltammetry (SDLSV) under the optimal conditions, the oxidation peak current was linearly correlated with vanillin concentration in the separate ranges of 0.01–20 μM (R2= 0.9808) and 20–100 μM (R2= 0.9964), yielding the detection limit of 6.0 nM (S/N = 3). In addition, MnO2 NWs-rGO/GCE showed the advantages of surface renewal, excellent reproducibility, good stability, and simple preparation. The method was applied to the nanomolarity determination of vanillin in commercial foods with satisfactory results. © 2020 Elsevier B.V.
语种：
英文
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Highly sensitive voltammetric sensor for nanomolar dopamine detection based on facile electrochemical reduction of graphene oxide and ceria nanocomposite
作者：
Deng, Peihong;Feng, Jinxia;Xiao, Jinyun;Liu, Jun* ;Nie, Xue;...
期刊：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY ,2020年167(14):146511 ISSN：0013-4651
通讯作者：
Liu, Jun
作者机构：
[He, Quanguo; Deng, Peihong; Nie, Xue; Li, Junhua] Hengyang Normal Univ, Key Lab Funct Organomet Mat Hunan Prov Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Xiao, Jinyun; Liu, Jun; Feng, Jinxia] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.
通讯机构：
[Liu, Jun] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.
关键词：
Amines;Cerium oxide;Charge transfer;Electrolytic reduction;Glass membrane electrodes;Graphene;Nanocomposites;Nanoparticles;Neurophysiology;Ceria nanoparticles;Dopamine detections;Electrochemical reductions;Electrochemical-reduced graphene oxides;Electrode preparation;Glassy carbon electrodes;Selective determination;Voltammetric sensor;Electrochemical sensors
摘要：
In this study, a new electrochemical sensor was fabricated and characterized based on a glassy carbon electrode (GCE) modified with ceria (CeO2) nanoparticles decorated with electrochemical reduced graphene oxide (denoted as Ceria-ErGO/GCE). The results showed that a large number of spherical ceria nanoparticles with a diameter of 20–200 nm are well wrapped by gossamer like ErGO nanosheets. Compared with ceria and ErGO, ceria-ErGO nanocomposites have a synergistic effect on the charge transfer between the electrode and the solution interface. Ultrasensitive and selective determination of dopamine (DA) can be realized at the Ceria-ErGO/GCE. Under the optimum conditions, the calibration curve for the peak current of DA oxidation vs its concentration showed in three fragmented ranges of 6.0 nM–0.1 μM; 0.1 μM–2.0 μM and 2.0 μM–20 μM, respectively. The limit of detection of 3.0 nM (S/N = 3) was obtained under 90 s accumulation. In addition, the advantages of the sensor are easy regeneration of electrode surface, fast and convenient electrode preparation, low cost, sensitive and reliable determination results. This method is particularly suitable for the fast detection of DA in commercial pharmaceuticals and clinical urine as well as serum samples. © 2020 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.
语种：
英文
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Constructing heterostructured CoSe2/Ni3Se4@N-doped carbon nanosheets/ketjen black carbon as a robust oxygen evolution electrocatalyst
作者：
Liu, Guiyu;Zhang, Zhiliang;Li, Junhua;Liu, Jinlong;Long, Xuanda;...
期刊：
International Journal of Hydrogen Energy ,2020年45(55):30666-30672 ISSN：0360-3199
通讯作者：
Qian, Dong
作者机构：
[Long, Xuanda; Zhang, Zhiliang; Qian, Dong; Liu, Guiyu] Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Peoples R China.;[Li, Junhua; Liu, Guiyu] Hengyang Normal Univ, Hengyang 421008, Peoples R China.;[Liu, Jinlong] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England.;[Chen, Hong] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China.;[Tong, Haixia] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Peoples R China.
通讯机构：
[Qian, Dong] C;Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Resources, Changsha 410083, Peoples R China.
关键词：
Carbon;Doping (additives);Electrocatalysts;Iridium compounds;Nanosheets;Nickel compounds;Oxygen;Ruthenium compounds;Black carbon;Carbon material;Control groups;High conductivity;Hydrothermal methods;Overpotential;Oxygen evolution;Tafel slopes;Selenium compounds
摘要：
We design and construct a novel heterostructured CoSe2/Ni3Se4@N-doped carbon nanosheets/Ketjen black carbon (denoted as CoSe2/Ni3Se4@NC/KB) via the combination of pyrolysis and hydrothermal method. As a result of the exceptional synergism between CoSe2 and Ni3Se4 as well as high conductivity of carbon materials, the obtained CoSe2/Ni3Se4@NC/KB drives an OER current density of 10 mA cm−2 by an overpotential of 260 mV and displays a low Tafel slope of 68 mV dec−1, outmanoeuvring commercial RuO2 and IrO2, control groups (i.e. Ni3Se4@NC/KB, CoSe2@NC/KB, and CoSe2/Ni3Se4@NC), as well as most hybrids of selenides and carbon materials reported recently. © 2020 Hydrogen Energy Publications LLC
语种：
英文
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