| 氯离子伏安刻蚀制备高活性多孔银膜及其对三氯乙酸的电化学检测（英文） |
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| 引用本文： | 褚有群,王玲巧,黄章烤,徐颖华,赵峰鸣.氯离子伏安刻蚀制备高活性多孔银膜及其对三氯乙酸的电化学检测（英文）[J].无机化学学报,2020,36(3):555-565. |
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| 作者姓名： | 褚有群 王玲巧 黄章烤 徐颖华 赵峰鸣 |
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| 作者单位： | 浙江工业大学化学工程学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032,浙江工业大学化学工程学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032,浙江工业大学化学工程学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032,浙江工业大学化学工程学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032,浙江工业大学化学工程学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032 |
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| 基金项目： | 浙江省自然科学基金（No.LY17B050006）和国家重点研究开发计划（No.2017YFB0307503）资助项目 |
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| 摘 要： | 采用无机阴离子促进的伏安刻蚀技术在银线表面制备高活性多孔银膜。优选的氯离子在伏安条件下通过微反应刻蚀,促使银丝表面形成自支撑的多孔通道。当在银丝电极上施加连续的正电位后,银电极表面在氯离子作用下快速形成AgCl膜,经施加的电位反向,在电化学还原作用下氯离子剥离,AgCl膜自发转化为自支撑的多孔银膜。研究表明,制备的多孔银膜(p-Ag film)对三氯乙酸具有较高的电催化活性,与原始银丝(r-Ag wire)相比,电化学活性表面积和电催化性能分别提高了174和3.7倍。将其用于三氯乙酸的电化学检测时,在浓度为0.1~518.1μmol·L-1范围内,制备的多孔银膜电极的最低检测限可达70 nmol·L-1(拟合相关性系数R2=0.9983)。
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| 关 键 词： | 银 阴离子 氯离子 多孔结构 电化学 传感器 |
| 收稿时间： | 2019/10/10 0:00:00 |
| 修稿时间： | 2019/12/6 0:00:00 |
Highly Activated Polyporous Silver Film: Preparation by Voltammetric Etching with Chloride Ion Promotion and Electrochemical Determination of Trichloroacetic Acid |
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| CHU You-Qun,WANG Ling-Qiao,HUANG Zhang-Kao,XU Ying-Hua and ZHAO Feng-Ming.Highly Activated Polyporous Silver Film: Preparation by Voltammetric Etching with Chloride Ion Promotion and Electrochemical Determination of Trichloroacetic Acid[J].Chinese Journal of Inorganic Chemistry,2020,36(3):555-565. |
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| Authors: | CHU You-Qun WANG Ling-Qiao HUANG Zhang-Kao XU Ying-Hua and ZHAO Feng-Ming |
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| Institution: | State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China,State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China,State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China,State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China and State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China |
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| Abstract: | A highly activated polyporous silver film was constructed on the outer ring of silver wire by voltammetric etching using halogen anions.In particular,chloride ion etching can promote the formation of self-supported porous channel structure on silver wire surface via microcell reactions.Appling a continuous positive potential to the silver wire electrode contributes to form a thin film of AgCl.After electrochemical reduction,chloride ions are stripped from AgCl and the AgCl spontaneously transformed to self-supported polyporous silver film.The as prepared self-supported polyporous silver film electrode(p-Ag film)reveals substantial electrocatalytic activity for the selective and sensitive sensing of trichloroacetic acid.The p-Ag film electrode displays 174 and 3.7 times enhancement in electrochemical active surface area and the dechlorination reaction,relative to the pristine silver wire electrode(r-Ag wire).The novel electrodes exhibited a low detection limit of 70 nmol·L-1(fitting correlation coefficient R2=0.9983)with the trichloroacetic acid concentration range of 0.1~518.1μmol·L-1. |
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| Keywords: | silver anions chlorine polyporous structure electrochemistry sensors |
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