酪氨酸在电还原氧化石墨烯修饰电极上的电化学行为及其在食品中的测定
作者：
邓培红;宋玲
期刊：
衡阳师范学院学报 ,2024年45(03):47-53 ISSN：1673-0313
作者机构：
衡阳师范学院 化学与材料科学学院,湖南 衡阳 421008;[宋玲] 衡阳市第九中学,湖南 衡阳 421008;[邓培红] 衡阳师范学院
关键词：
氧化石墨烯;电还原;酪氨酸;伏安法测定
摘要：
基于电还原氧化石墨烯修饰玻碳电极(ERGO/GCE)构建了一种灵敏的酪氨酸(Tyr)伏安传感器,研究了Tyr在该传感器上的电化学行为.在0.1 mol/L硫酸溶液中,与裸GCE相比,Tyr的氧化峰电流在ERGO/GCE上显著增加,表明ERGO对Tyr具有较强的电催化活性.对实验条件进行了优化,并对氧化机理进行了探讨.在最佳实验条件下,Tyr的校准曲线在0.2-100 μmol/L范围内呈良好的线性关系(R2=0.9989),检测限(LOD)为0.06 μmol/L(S/N=3).此外,ERGO/GCE对Tyr的测定具有良好的重现性、稳定性、选择性和较高的灵敏度,可应用于食品中Tyr的测定.
语种：
中文
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High-sensitivity electrochemical sensing platform for acetaminophen based on MnS/Co3S4 hybrids doped electrochemically reduced graphene oxide nanocomposite
作者：
Zhou, Chuanqin;Shi, Shuting;Wei, Yanping;Chen, Aiting;Tang, Nana;...
期刊：
Inorganic Chemistry Communications ,2023年155:111123 ISSN：1387-7003
通讯作者：
He, QG;Deng, PH
作者机构：
[He, Quanguo; Zhou, Chuanqin; Chen, Aiting; Zuo, Jingsong; Tang, Nana; Shi, Shuting; Wei, Yanping; He, QG] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[Deng, Peihong; Deng, PH] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Organometall New Mat, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.
通讯机构：
[Deng, PH ; He, QG ] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Organometall New Mat, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.
关键词：
Acetaminophen;Electrochemical reduction;Graphene oxide;MnS/Co3S4 hybrids;Voltammetric sensor
摘要：
In this work, hollow tubular manganese-cobalt sulfide (MnS/Co3S4) hybrids were synthesized using a hydrothermal method and anchored on graphene oxide (GO) by simple ultrasonic dispersion. The nanocomposites were modified onto glassy carbon electrode (GCE) surface by a drop-coating method. After potentiostatic reduction, GO was converted into electrochemically reduced graphene oxide (ERGO), and a sensitive sensor, denoted as MnS/Co3S4-electrochemically reduced graphene oxide modified glassy carbon electrode (MnS/Co3S4-ERGO/GCE), was constructed for acetaminophen (AC) detection. The electrochemical sensing performance of MnS/Co3S4-ERGO/GCE was evaluated in detail. The experimental results show that MnS/Co3S4-ERGO/GCE has excellent electrocatalytic activity for the oxidation of AC. The kinetic process for the electrooxidation of AC on the MnS/Co3S4-ERGO/GCE was studied and the measurement parameters optimized. Under optimal conditions, the oxidation peak current is linear with the concentration of AC in the range of 0.01–20 μM and 20–80 μM, with a detection limit of 6.0 nM. Based on the high sensitivity and excellent selectivity of MnS/Co3S4-ERGO/GCE, the method has been applied for the determination of AC in commercial tablets and human serum samples, with satisfactory recoveries of 98.8%–101.5% and 98.6%–102.8%, indicating high accuracy of the proposed method. © 2023 Elsevier B.V.
语种：
英文
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Ultrasensitive and selective electrochemical sensor for nanomolar dopamine determination based on MnS/Co3S4 hybrids embedded on electrochemically reduced graphene oxide
作者：
Shi, Shuting;Zhou, Chuanqin;Wei, Yanping;Chen, Aiting;Tang, Nana;...
期刊：
Microchemical Journal ,2023年194:109310 ISSN：0026-265X
通讯作者：
He, QG;Deng, PH
作者机构：
[He, Quanguo; Zhou, Chuanqin; Chen, Aiting; Tang, Nana; Shi, Shuting; Wei, Yanping; He, QG] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[Deng, Peihong; Deng, PH] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Organometall New Mat, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China.
通讯机构：
[Deng, PH ; He, QG ] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Organometall New Mat, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China.
关键词：
Dopamine;Electrochemical sensor;Nanomolar level;Reduced graphene oxide;MnS/Co 3 S 4 hybrids
摘要：
An ultrasensitive and selective electrochemical sensor has been constructed for the quantitative assay of dopamine (DA) based on hollow tubular manganese-cobalt sulfide (MnS/Co3S4) hybrids embedded on electrochemically reduced graphene oxide (ErGO). The MnS/Co3S4 heterostructures were created by two-step ion exchange method, of which Co9S8 with hollow tubular structures was fabricated by solvothermal method using the self-made cobalt chloride carbonate hydroxide (CO(CO3)0.35Cl0.20(OH)1.10) as precursor and sodium disulfide monohydrate as sulfur source and manganese chloride as manganese source. The MnS/Co3S4-ErGO/GCE could exhibit strong catalytic ability for the redox reaction of DA. Under the optimal conditions, the developed sensor exhibits a wide linear response for DA ranging from 6.0 nM to 20.0 μM by second-order derivative linear sweep voltammetry (SDLSV), with a detection limit of 2.0 nM. In addition, the developed method exhibited high sensitivity and selectivity, good reproducibility and low-cost. It is a very promising analytical method for the determination of DA in pharmaceutical and biological samples. © 2023 Elsevier B.V.
语种：
英文
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基于课程思政的分析化学混合式教学探索
作者：
代聪;刘梦琴;唐斯萍;邓培红
期刊：
广东化工 ,2022年49(18):215-216,227 ISSN：1007-1865
作者机构：
衡阳师范学院 化学与材料科学学院,湖南 衡阳 421008;[刘梦琴; 邓培红; 唐斯萍; 代聪] 衡阳师范学院
关键词：
分析化学;课程思政;混合式教学;教学设计;教学反思
摘要：
专业知识与思想政治理论同向同行，课程思政贯穿专业教育全过程是教学改革的必然趋势。本文以分析化学教学为载体，结合分析化学的课程特点和学生特点，深入挖掘其中蕴含的思政元素。基于知识逻辑、实际应用和课程思政，重构教学过程，在混合式教学中实现知识和思政并行。通过对教学结果的分析反思，反馈并完善教学设计，达成分析化学中课程思政的目标。
语种：
中文
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非酶纳米电化学传感器用于有机磷农药残留物检测综述
作者：
冯金霞;田亚玲;邓培红;巫祎咏;刘军;...
期刊：
湖南工业大学学报 ,2021年(6):81-94 ISSN：1673-9833
作者机构：
湖南工业大学生命科学与化学学院;衡阳师范学院化学与材料科学学院
关键词：
非酶;纳米材料;电化学传感器;有机磷农药
摘要：
近年来,非酶纳米电化学传感器检测有机磷农药的研究受到广泛关注。非酶纳米电化学传感器具有检测成本低、操作方便、灵敏度高、响应快速等优点。碳纳米材料、纳米金属颗粒、纳米金属氧化物和纳米导电聚合物及其复合材料的出现,大大提高了有机磷农药电化学传感器的性能。随着纳米技术的出现,在合成纳米材料用于分析物特异性检测方面取得了进展,这些材料可用于构建高特异性、强选择性和经济有效的电化学传感器,以取代其他分析技术。鉴于各类纳米材料新结构的重要性,对非酶纳米电化学传感器领域的最新研究进展进行综述,并重点介绍纳米复合材料在有机磷农药检测中的应用。
语种：
中文
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基于还原氧化石墨烯和乙炔炭黑的新型电化学传感器灵敏测定食品色素日落黄
作者：
邓培红;王淳之;唐清;曾珺;朱青青;...
期刊：
衡阳师范学院学报 ,2020年41(03):70-75 ISSN：1673-0313
作者机构：
衡阳师范学院化学与材料科学学院,湖南衡阳 421008;衡阳市第八中学,湖南衡阳 421001;衡阳市成章实验中学,湖南衡阳 421007;[曾珺; 朱青青; 舒晶; 唐清] 衡阳市成章实验中学;[邓培红] 衡阳师范学院
关键词：
日落黄;还原氧化石墨烯;可控电位还原;伏安测定
摘要：
采用可控的恒电位还原法制备了电化学还原氧化石墨烯修饰乙炔炭黑糊电极(简称ERGO/ABPE).用扫描电子显微镜(SEM)和循环伏安法(CV)对其进行了表征.与传统碳糊电极(CPE)相比,在ERGO/ABPE上观察到一个峰形良好的日落黄(SY)氧化峰,这是由于电极表面的电化学还原氧化石墨烯具有良好的电催化活性和乙炔炭黑具有良好的导电性和吸附性所致.详细优化了SY检测的实验参数.在最佳的实验条件下,采用二阶导数线性扫描伏安法,ERGO/ABPE对SY浓度在4.0×10-8～2.0×10-6 mol/L和2.0× 10-6～1.0× 10-5 mol/L范围内具有良好的线性响应,检测限为1.0× 10-8 mol/L (S/N=3).该方法用于软饮料中SY的检测,结果满意.
语种：
中文
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MnO2纳米棒—石墨烯复合物修饰乙炔黑电极灵敏检测饮料中的喹啉黄
作者：
邓培红;王淳之;唐清;曾珺;朱青青;...
期刊：
衡阳师范学院学报 ,2019年40(06):46-51 ISSN：1673-0313
作者机构：
衡阳师范学院 化学与材料科学学院,湖南 衡阳,421008;衡阳市第八中学,湖南 衡阳,421001;衡阳市成章实验中学,湖南 衡阳,421007;[曾珺; 朱青青; 舒晶; 唐清] 衡阳市成章实验中学;[邓培红] 衡阳师范学院
关键词：
二氧化锰纳米棒;石墨烯;喹啉黄;修饰电极;测定
摘要：
在乙炔黑电极(ABPE)表面用滴涂法修饰了二氧化锰纳米棒(MnO2 NRs)—氧化石墨烯(GO)复合物,用控制电位法对氧化石墨烯进行电化学还原得到石墨烯(GR).用扫描电子显微镜(SEM)和X射线衍射(XRD)对复合材料进行了表征,并通过循环伏安法和二阶导数线性扫描伏安法研究了喹啉黄(QY)在MnO2 NRs-GR/ABPE上的电化学响应.结果表明,与裸ABPE相比,MnO2 NRs-GR/ABPE对QY具有良好的电催化活性,在该修饰电极上可观察到QY灵敏的氧化峰.对QY检测的实验参数进行了优化,在最佳实验条件下,QY在MnO2 NRs-GR/ABPE上的氧化峰电流与其浓度在2.0×10-7～8.0×10-6 mol/L和8.0×10-6～8.0×10-5 mol/L范围内有良好的线性关系,检测限为8.0×10-8 mol/L.将该方法应用于饮料中QY的检测,结果满意.
语种：
中文
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Facile preparation of cu2o nanoparticles and reduced graphene oxide nanocomposite for electrochemical sensing of rhodamine b
作者：
He, Quanguo;Liu, Jun;Tian, Yaling;Wu, Yiyong;Magesa, Felista;...
期刊：
Nanomaterials ,2019年9(7):958 ISSN：2079-4991
通讯作者：
Li, Guangli;Deng, Peihong
作者机构：
[Magesa, Felista; He, Quanguo; Li, Guangli; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Quanguo; Deng, Peihong] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[He, Quanguo; Deng, Peihong] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Magesa, Felista] Nelson Mandela African Inst Sci & Technol, Sch Life Sci & Bioengn, POB 447, Arusha, Tanzania.
通讯机构：
[Li, Guangli; Deng, Peihong] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Cu2O nanoparticles;Electroanalysis;Reduced graphene oxide;Rhodamine B
摘要：
In this paper, the preparation, characterization, and electrochemical application of Cu2O nanoparticles and an electrochemical reduced graphene oxide nanohybrid modified glassy carbon electrode (denoted as Cu2O NPs-ERGO/GCE) are described. This modified electrode was used as an electrochemical sensor for the catalytic oxidation of rhodamine B (RhB), and it exhibited an excellent electrochemical performance for RhB. The oxidation potential of RhB was decreased greatly, and the sensitivity to detect RhB was improved significantly. Under optimum conditions, a linear dynamic range of 0.01–20.0 µM and a low detection limit of 0.006 µM were obtained with the Cu2O NPs-ERGO/GCE by using second-order derivative linear sweep voltammetry. In addition, the selectivity of the prepared modified electrode was analyzed for the determination of RhB. The practical application of this sensor was investigated for the determination of RhB in food samples, and satisfactory results were obtained. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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A Novel Modified Electrode for Detection of the Food Colorant Sunset Yellow Based on Nanohybrid of MnO2 Nanorods-Decorated Electrochemically Reduced Graphene Oxide
作者：
Ding, Ziyu;Deng, Peihong* ;Wu, Yiyong;Tian, Yaling;Li, Guangli;...
期刊：
Molecules ,2019年24(6):24061178-1-24061178-15 ISSN：1420-3049
通讯作者：
He, Quanguo;Deng, Peihong
作者机构：
[Li, Guangli; He, Quanguo; Tian, Yaling; Ding, Ziyu; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[Tian, Yaling; Ding, Ziyu; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[He, Quanguo; Deng, Peihong] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
colorant analysis;sunset yellow;MnO2 nanorods;electrochemical reduced graphene oxide;voltammetric determination
摘要：
The nanohybrid of electrochemically-reduced graphene oxide (ERGO) nanosheets decorated with MnO2 nanorods (MnO2 NRs) was modified on the surface of a glassy carbon electrode (GCE). Controlled potential reduction was applied for the reduction of graphene oxide (GO). The characterization was performed by scanning electron microscopy, X-ray diffraction and cyclic voltammetry. Compared with the poor electrochemical response at bare GCE, a well-defined oxidation peak of sunset yellow (SY) was observed at the MnO2 NRs-ERGO/GCE, which was attributed to the high accumulation efficiency as well as considerable electrocatalytic activity of ERGO and MnO2 NRs on the electrode surface. The experimental parameters for SY detection were optimized in detail. Under the optimized experiment conditions, the MnO2 NRs-ERGO/GCE showed good linear response to SY in concentration range of 0.01–2.0 µM, 2.0–10.0 µM and 10.0–100.0 µM with a detection limit of 2.0 nM. This developed method was applied for SY detection in soft drinks with satisfied detected results. © 2019 by the authors.
语种：
英文
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Rapid and sensitive voltammetric detection of rhodamine B in chili-containing foodstuffs using MnO2 nanorods/electro-reduced graphene oxide composite
作者：
He, Quanguo;Liu, Jun;Xia, Yonghui;Tuo, Du;Deng, Peihong* ;...
期刊：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY ,2019年166(10):B805-B813 ISSN：0013-4651
通讯作者：
Li, Guangli;Deng, Peihong
作者机构：
[Tuo, Du; He, Quanguo; Li, Guangli; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Quanguo; Li, Guangli; Deng, Peihong; Deng, PH; Li, GL; Liu, Jun] Hengyang Normal Univ, Hunan Prov Key Lab Funct Metal Organ Cpds, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Li, Guangli; Liu, Jun; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.;[Xia, Yonghui] Zhuzhou Inst Food & Drug Control, Zhuzhou 412000, Peoples R China.
通讯机构：
[Li, Guangli; Deng, PH; Li, GL] H;[Li, Guangli] F;Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Hunan Prov Key Lab Funct Metal Organ Cpds, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
关键词：
Electrochemistry;Glass membrane electrodes;Graphene;High performance liquid chromatography;Manganese oxide;Nanorods;Analytical conditions;Electrocatalytic effects;In-situ detections;Limit of detection;Modified glassy carbon electrode;Potentiostatic reduction;Voltammetric detection;Voltammetric sensor;Rhodium compounds
摘要：
A facile voltammetric sensor based on MnO2 nanorods/electro-reduced graphene oxide composite modified glassy carbon electrode (MnO2NRs-ERGO/GCE) was proposed for the detection of Rhodamine B (RhB). The MnO2NRs-ERGO/GCE was fabricated by a facile drop-casting approach followed by a potentiostatic reduction technique. A well-shaped oxidation peak of RhB was observed at the MnO2NRs-ERGO/GCE, and the response peak current was 17-fold and 2-fold higher than that of bare GCE and ERGO/GCE respectively, attributing to the synergistic electrocatalytic effect from ERGO sheets and MnO2NRs. Under the optimal analytical conditions, the response peak currents linearly increased with the RhB concentrations varying from 0.02 μM to 1.0 μM and from 1.0 μM to 20 μM. The limit of detection (LOD, S/N = 3) was 6.0 nM. Furthermore, the MnO2NRs-ERGO/GCE showed good selectivity, repeatability, reproducibility and stability. Finally, the MnO2NRs-ERGO/GCE was successfully employed to detect RhB in different commercial chili-containing foodstuffs, and the results were in good accordance with the values that detected by high-performance liquid chromatography. Combining with low cost and portable electrochemical apparatus, the proposed sensor is especially suitable for the in-situ detection of RhB in actual food samples. © 2019 The Electrochemical Society.
语种：
英文
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A promising sensing platform toward dopamine using MnO2 nanowires/electro-reduced graphene oxide composites
作者：
He, Quanguo;Liu, Jun;Liu, Xiaopeng;Li, Guangli* ;Chen, Dongchu;...
期刊：
Electrochimica Acta ,2019年296:683-692 ISSN：0013-4686
通讯作者：
Deng, Peihong;Li, Guangli
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.;[Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.;[Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, 165 Huangbai Rd, Yanfeng Dist 421008, Hengyang, Peoples R China.;[Li, Guangli] Hunan Univ Technol, Coll Life Sci & Chem, 88 West Taishan Rd, Tianyuan Dist 412007, Zhuzhou, Peoples R China.
通讯机构：
[Deng, Peihong; Li, Guangli] H;Hengyang Normal Univ, Dept Chem & Mat Sci, 165 Huangbai Rd, Yanfeng Dist 421008, Hengyang, Peoples R China.;Hunan Univ Technol, Coll Life Sci & Chem, 88 West Taishan Rd, Tianyuan Dist 412007, Zhuzhou, Peoples R China.
关键词：
MnO2 nanowires;Reduced graphene oxide;Modified electrode;Dopamine sensor;Electrocatalytic oxidation
摘要：
A promising sensing platform for the ultrasensitive detection of dopamine (DA) has been constructed using MnO2 nanowires-electrochemically reduced graphene oxide modified glassy carbon electrode (MnO2 NWs-ErGO/GCE). The proposed MnO2 NWs-ErGO/GCEs had the large electrochemical active area and relative low charge transfer resistant (R-ct). As a result, the response peak current of the MnO2 NWs-ErGO is about 13 times higher than that of the bare GCE, demonstrating the remarkable electrocatalytic activity toward DA. The electrochemical kinetics revealed that DA oxidation is quasi-reversible reaction coupling with one electron and two protons. Three linear ranges (0.01 mu M - 0.10 mu M, 0.10 mu M - 1.0 mu M, and 1.0 mu M - 80 mu M) were obtained on the MnO2 NWs-ErGO/GCE, with a low detection limit of 1.0 nM (S/N = 3). Moreover, the response current was almost unaltered even in the presence of 100-fold ascorbic acid (AA) and uric acid (UA), suggesting MnO2 NWs-ErGO has good selectivity toward DA. Finally, the MnO2 NWs-ErGO/GCEs were successfully applied to detect DA in the injection solutions and human blood serum samples with high accuracy and good recovery. (C) 2018 Elsevier Ltd. All rights reserved.
语种：
英文
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Electrochemical Sensor for Rapid and Sensitive Detection of Tryptophan by a Cu2O Nanoparticles-Coated Reduced Graphene Oxide Nanocomposite
作者：
He, Quanguo;Tian, Yaling;Wu, Yiyong;Liu, Jun;Li, Guangli;...
期刊：
Biomolecules ,2019年9(5):ARTN 176 ISSN：2218-273X
通讯作者：
Deng, Peihong;Chen, Dongchu
作者机构：
[He, Quanguo; Tian, Yaling; Wu, Yiyong; Liu, Jun; Li, Guangli] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China;[He, Quanguo; Tian, Yaling; Wu, Yiyong; Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Univ Hunan Prov, Key Lab Funct Organometall Mat,Key Lab Funct Met, Hengyang 421008, Peoples R China;[He, Quanguo; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China
通讯机构：
[Deng, Peihong] H;[Chen, Dongchu] F;Hengyang Normal Univ, Dept Chem & Mat Sci, Univ Hunan Prov, Key Lab Funct Organometall Mat,Key Lab Funct Met, Hengyang 421008, Peoples R China. Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
关键词：
cuprous oxide;electrochemical reduced graphene oxide;tryptophan;voltammetric detection
摘要：
In this paper, a nanocomposite of cuprous oxide and electrochemically reduced graphene oxide (Cu2O-ERGO) was prepared by a simple and low-cost method; hereby, a new method for the electrochemical determination of tryptophan (Trp) by this composite modified glassy carbon electrode (GCE) is proposed. The prepared materials and modified electrodes were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and cyclic voltammetry (CV). The results showed that Cu2O-ERGO/GCE had good electrocatalytic activity for Trp. The effects of supporting electrolyte, scanning rate, accumulation potential, and accumulation time on the determination of Trp were studied. Under the optimum experimental conditions, Trp was quantitatively analyzed by square-wave voltammetry (SWV). The oxidation peak current of Trp had a good linear relationship with its concentration in the range of 0.02-20 M, and the detection limit was 0.01 M (S/N = 3). In addition, the modified electrode has high sensitivity, good repeatability, and long-term stability. Finally, the proposed method has been successfully applied in the determination of Trp concentration in practical samples.
语种：
英文
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Facile Electrochemical Sensor for Nanomolar Rutin Detection Based on Magnetite Nanoparticles and Reduced Graphene Oxide Decorated Electrode
作者：
He, Quanguo;Wu, Yiyong;Tian, Yaling;Li, Guangli;Liu, Jun;...
期刊：
Nanomaterials ,2019年9(1):115- ISSN：2079-4991
通讯作者：
Deng, Peihong;Chen, Dongchu
作者机构：
[He, Quanguo; Li, Guangli; 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] Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Deng, Peihong; Deng, PH; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
通讯机构：
[Deng, Peihong] H;[Deng, PH; Chen, DC] F;Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, 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：
amine-functionalized Fe3O4 nanoparticles;electrochemically reduced graphene oxide;nanomolar electroanalysis;rutin
摘要：
A new electrochemical sensor for nanomolar rutin detection based on amine-functionalized Fe3O4 nanoparticles and electrochemically reduced graphene oxide nanocomposite modified glassy carbon electrode (NH2-Fe3O4 NPs-ErGO/GCE) was fabricated through a simple method, and the X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and electrochemical technique were used to characterize the modified electrode. The electrochemical behavior of rutin on the Fe3O4 NPs-ErGO/GCE was studied in detail. The electrochemical response of rutin at this modified electrode was remarkably higher than that of the bare GCE or other modified GCE (GO/GCE, Fe3O4 NPs-GO/GCE, and ErGO/GCE). Under the optimum determination conditions, Fe3O4 NPs-ErGO/GCE provided rutin with a broader detection range of 6.0 nM–0.1 µM; 0.1–8.0 µM and 8.0–80 µM, a minimum detectable concentration of 4.0 nM was obtained after 210 s accumulation. This novel method was applied in determination of rutin in pharmaceutical tablets and urine samples with satisfactory results. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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Construction of effective electrochemical sensor for the determination of quinoline yellow based on different morphologies of manganese dioxide functionalized graphene
作者：
Wu, Yiyong;Deng, Peihong* ;Tian, Yaling;Magesa, Felista;Liu, Jun;...
期刊：
Journal of Food Composition and Analysis ,2019年84:103280 ISSN：0889-1575
通讯作者：
He, Quanguo;Deng, Peihong
作者机构：
[Magesa, Felista; Li, Guangli; He, Quanguo; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Magesa, Felista] Nelson Mandela African Inst Sci & Technol, Life Sci & Bioengn, Arusha, Tanzania.
通讯机构：
[He, Quanguo; Deng, Peihong] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Determination;Elecctrochemical reduction;Electrochemical sensor;Graphene;Manganese dioxide;Morphology;Quinoline yellow
摘要：
Developing simple and accurate QY detection methods is of great significant importance in ensuring food safety including drinks. Manganese dioxide nanoparticles (MnO2 NPs) with different morphologies were synthesized by hydrothermal method. Manganese dioxide/graphene (MnO2/GR) nanocomposites were directly prepared on the surface of glassy carbon electrode (GCE) by electrochemical reduction. The materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The effects of nano-MnO2 with different morphologies on the performance of quinoline yellow (QY) detection was investigated. The experimental findings revealed that MnO2 nanorods (MnO2 NRs) had better properties than both MnO2 nanowires (MnO2 NWs) and MnO2 nanotubes (MnO2 NTs). Under optimal experimental conditions, a good linear relationship between peak current of QY on GR/MnO2 NRs/GCE and concentrations ranging between 0.1 μM˜6.0 μM and 6.0 μM˜60 μM were observed, and 0.04 μM was the detection limit. The fabricated sensor was successfully tested to detect QY in soft drinks. © 2019 Elsevier Inc.
语种：
英文
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A Simple and Efficient Molecularly Imprinted Electrochemical Sensor for the Selective Determination of Tryptophan
作者：
Tian, Yaling;Deng, Peihong* ;Wu, Yiyong;Ding, Ziyu;Li, Guangli;...
期刊：
Biomolecules ,2019年9(7):ARTN 294 ISSN：2218-273X
通讯作者：
He, Quanguo;Deng, Peihong
作者机构：
[Tian, Yaling; Wu, Yiyong; Ding, Ziyu; Li, Guangli; Liu, Jun; He, Quanguo] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China;[Tian, Yaling; Deng, Peihong; Wu, Yiyong; Ding, Ziyu; Liu, Jun] Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Hunan, Peoples R China;[Tian, Yaling; Deng, Peihong; Wu, Yiyong; Ding, Ziyu; Liu, Jun] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Hunan, Peoples R China;[Tian, Yaling; Deng, Peihong; Wu, Yiyong; Ding, Ziyu; Liu, Jun] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China
通讯机构：
[He, Quanguo; Deng, Peihong] H;Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China. Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Hunan, Peoples R China. Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Hunan, Peoples R China. Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
关键词：
molecularly imprinted chitosan film;electrochemical sensor;tryptophan;selective determination
摘要：
In this paper, a tryptophan (Trp) molecularly imprinted chitosan film was prepared on the surface of an acetylene black paste electrode using chitosan as the functional polymer, Trp as the template molecule and sulfuric acid as the crosslinking agent. The surface morphologies of non-imprinted and imprinted electrodes were characterized by scanning electron microscopy (SEM). The formation of hydrogen bonds between the functional polymer and the template molecule was confirmed by infrared spectroscopy. Some factors affecting the performance of the imprinted electrode such as the concentration of chitosan, the mass ratio of chitosan to Trp, the dropping amount of the chitosan-Trp mixture, the solution pH, and the accumulation potential and time were discussed. The experimental results show that the imprinted electrode exhibit good affinity and selectivity for Trp. The dynamic linear ranges of 0.01-4 mu M, 4-20 mu M and 20-100 mu M were obtained by second derivative linear sweep voltammetry, and the detection limit was calculated to be 8.0 nM. The use of the imprinted electrode provides an effective method for eliminating the interference of potentially interfering substances. In addition, the sensor has high sensitivity, reproducibility and stability, and can be used for the determination of Trp in pharmaceutical preparations and human serum samples.
语种：
英文
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Facile and Ultrasensitive Determination of 4-Nitrophenol Based on Acetylene Black Paste and Graphene Hybrid Electrode.
作者：
He, Quanguo;Tian, Yaling;Wu, Yiyong;Liu, Jun;Li, Guangli;...
期刊：
Nanomaterials ,2019年9(3):429 ISSN：2079-4991
通讯作者：
Deng, Peihong;Chen, Dongchu
作者机构：
[He, Quanguo; Li, Guangli; 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] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
通讯机构：
[Deng, Peihong] H;[Chen, Dongchu] F;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：
4-Nitrophenol;acetylene black;graphene;nanomolar detection;voltammetric sensor;water resources protection
摘要：
4-nitrophenol (4-NP) is a hazardous waste and a priority toxic pollutant identified by US Environmental Protection Agency (EPA). Hence, in this paper, a voltammetric sensor was proposed for the direct and sensitive detection of 4-nitrophenol (4-NP) at nanomolar level in complex matrices by using graphene and acetylene black paste hybridized electrode (GR/ABPE). Under optimal conditions, the calibration curve demonstrates a linear relationship for 4-NP in the range from 20 nM to 8.0 µM and 8.0 µM to 0.1 mM separately with the detection limit of 8.0 nM. In addition to it, the performance of the GR/ABPE in practical applications was evaluated by detecting 4-NP in various water samples, and satisfactory recoveries were realized. Therefore, GR/ABPE may have a great potential application for facile and sensitive detection of 4-NP in complex matrices at nanomolar level. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
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英文
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Facile Preparation of Fe3O4/C Nanocomposite and Its Application for Cost-Effective and Sensitive Detection of Tryptophan
作者：
Liu, Jun;Dong, Shuai;He, Quanguo;Yang, Suchun;Xie, Mei;...
期刊：
Biomolecules ,2019年9(6):245- ISSN：2218-273X
通讯作者：
Li, Guangli;Deng, Peihong
作者机构：
[He, Quanguo; Li, Guangli; Xie, Mei; Dong, Shuai; Yang, Suchun; Liu, Jun] Hunan Univ Technol, Coll Life Sci & Chem, Hunan Key Lab Biomed Nanomat & Devices, Zhuzhou 412007, Peoples R China.;[Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[Xia, Yonghui] Zhuzhou Inst Food & Drug Control, Zhuzhou 412000, 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, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.
关键词：
Fe3O4/C composite;Second derivative linear scan voltammetry;Tryptophan;Voltammetric detection
摘要：
In this study, we reported facile synthesis of Fe3O4/C composite and its application for the cost-effective and sensitive determination of tryptophan (Trp) in human serum samples. Fe3O4/C composites were prepared by a simple one-pot hydrothermal method followed by a mild calcination procedure, using FeCl3·6H2O as Fe3O4 precursor, and glucose as reducing agent and carbon source simultaneously. The Fe3O4/C composite modified glassy carbon electrode (Fe3O4/C/GCE) was prepared by drop-casting method. The microstructure and morphology of Fe3O4/C composite was characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Due to large specific surface area and synergistic effect from Fe3O4 nanoparticles and carbon coating, Fe3O4/C composite showed excellent electrocatalytic activity toward the oxidation of Trp. As a result, the proposed Fe3O4/C/GCE displayed superior analytical performances toward Trp determination, with two wide detection ranges (1.0–80 µM and 80–800 µM) and a low detection limit (0.26 µM, S/N = 3). Moreover, successful detection of Trp in human serum samples further validate the practicability of the proposed sensor. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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多壁碳纳米管修饰玻碳电极伏安法测定香草醛
作者：
刘晓鹏;刘国强;邓培红;贺曦;肖裔繁;...
期刊：
分析测试学报 ,2019年38(3):312-317 ISSN：1004-4957
作者机构：
衡阳师范学院化学与材料科学学院功能金属有机化合物湖南省重点实验室,湖南衡阳421008;湖南工业大学生命科学与化学学院,湖南株洲412007;衡阳师范学院化学与材料科学学院功能金属有机化合物湖南省重点实验室,湖南衡阳,421008;[肖裔繁; 邓培红; 贺曦; 刘国强; 刘晓鹏; 姜宏达; 梁贤文] 衡阳师范学院
关键词：
羧基化多壁碳纳米管(c-MWCNTs);香草醛;电化学行为;伏安测定
摘要：
制备了羧基化多壁碳纳米管修饰玻碳电极( c-MWCNTs /GCE),采用循环伏安法在0.5 mol /L HCl中研究了食品添加剂香草醛的电化学行为。结果显示,该修饰电极对香草醛的电化学氧化具有良好的电催化作用,与裸玻碳电极相比电流响应显著增强。香草醛在该修饰电极上的氧化为不可逆的扩散控制过程。在最佳条件下,采用二阶导数线性扫描伏安法进行测定,香草醛的氧化峰电流与其浓度在0.1 ~ 6.0 μmol /L和6.0 ~ 100 μmol /L范围内呈良好的线性关系,检出限( S /N = 3)为0.02 μmol /L。该修饰电极具有良好的重现性(RSD = 4.6%)和稳定性。方法应用于食品中香草醛的测定,回收率为96.3%~ 104%。
语种：
中文
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Modification of mesoporous silica with molecular imprinting technology: A facile strategy for achieving rapid and specific adsorption
作者：
Xu, Zhifeng* ;Deng, Peihong;Li, Junhua;Tang, Siping;Cui, Ying
期刊：
Materials Science and Engineering C: Materials for Biological Applications ,2019年94:684-693 ISSN：0928-4931
通讯作者：
Xu, Zhifeng
作者机构：
[Tang, Siping; Deng, Peihong; Xu, Zhifeng; Li, Junhua; Cui, Ying] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[Xu, Zhifeng] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Xu, Zhifeng] H;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Binding energy;Biosynthesis;Extraction;Fourier transform infrared spectroscopy;Gravimetric analysis;High resolution transmission electron microscopy;Hydrocarbons;Mass transfer;Molecular modeling;Monomers;Organic polymers;Phase separation;Polymerization;Silica;Thermogravimetric analysis;Transmission electron microscopy;2 ,4-dichlorophenoxyacetic acid;Click reaction;Mesoporous Silica;Molecular imprinting;SBA-15;Mesoporous materials;2,4 dichlorophenoxyacetic acid;beta cyclodextrin;beta cyclodextrin derivative;nitrogen;SBA-15;silicon dioxide;adsorption;chemistry;kinetics;molecular imprinting;porosity;procedures;proton nuclear magnetic resonance;solid phase extraction;synthesis;thermogravimetry;ultraviolet spectrophotometry;X ray diffraction;2,4-Dichlorophenoxyacetic Acid;Adsorption;beta-Cyclodextrins;Kinetics;Molecular Imprinting;Nitrogen;Porosity;Proton Magnetic Resonance Spectroscopy;Silicon Dioxide;Solid Phase Extraction;Spectrophotometry, Ultraviolet;Thermogravimetry;X-Ray Diffraction
摘要：
In order to improve the diffusion kinetics of molecularly imprinted materials (MIMs), applying imprinting technology to mesoporous materials is a promising strategy. In the present study, an imprinting approach based on the combination of mesoporous silica materials and molecular imprinting technology is reported. Molecularly imprinted material (MIM) for 2,4-dichlorophenoxyacetic acid (2,4-D) was prepared by using 2,4-D as the template molecule, alkyne-modified β-cyclodextrin and propargyl amine as the combinatorial functional monomers and SBA-15 as the supporter. The functional monomers were anchored to the azide-modified SBA-15 by azide–alkyne Click reaction. The synthesized MIM was characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), elemental analysis (EA), thermal gravimetric analysis (TGA), low-angle X-ray diffraction (XRD) and N2 adsorption–desorption analysis. The interactions between template and functional monomers were studied by proton NMR analysis and UV–vis experiments. The results of the equilibrium binding experiments and selective tests showed that the prepared MIM has binding affinity and specificity for a group of analytes which have similar size and shape to those of template. Binding kinetic experiments demonstrated that the present imprinting approach can effectively enhance the mass transfer rate. The solid phase extraction of 2,4-D using MIM as the adsorbent was investigated. The extraction conditions for the processes of loading, washing and eluting were optimized. The recoveries of the molecularly imprinted solid phase extraction (MISPE) column for 2,4-D were 76.3–88.9% with relative standard deviations (RSD) of 3.48–7.64%. © 2018 Elsevier B.V.
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英文
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基于MnO_2纳米线-还原石墨烯复合修饰电极的多巴胺电化学检测
作者：
He Quan-Guo;Liang Jing;Li Guang-Li* ;Deng Pei-Hong* ;Liu Jun;...
期刊：
分析化学 ,2018年46(3):438-445 ISSN：0253-3820
通讯作者：
Li Guang-Li;Deng Pei-Hong
作者机构：
[He Quan-Guo; Li Guang-Li; Liu Xiao-Peng; Liang Jing; Liu Jun] Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[Deng Pei-Hong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Li Guang-Li; Deng Pei-Hong] H;Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
MnO_2纳米线;还原石墨烯;修饰电极;多巴胺;电催化氧化
摘要：
通过电化学还原法制备MnO_2纳米线/还原石墨烯复合修饰电极(MnO_2-RGO/GCE),用于多巴胺(DA)的检测。采用扫描电镜和X-射线粉末衍射对不同的修饰电极微观形貌进行了表征,优化了电化学还原条件和测定DA实验条件。此外,还研究DA在裸电极及RGO或MnO_2-RGO修饰电极上的循环伏安响应。 MnO_2-RGO/GCE复合修饰电极实现AA、DA和UA氧化峰的有效分离,AA-DA和DA-UA的氧化峰电位差分别为268和128 mV。检测DA的线性范围为0.06~ 1.0 μmol/L和1.0~ 80 μmol/L,检出限为1.0 nmol/L(S/N= 3)。制备的MnO_2-RGO/GCE成功用于人血清样品的多巴胺含量分析。
语种：
中文
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