AgBiS2/Bi2S3分子印迹光电化学传感器用于测定残杀威

引用本文: 石小雪, 李秀琪, 魏小平, 李建平. AgBiS₂/Bi₂S₃分子印迹光电化学传感器用于测定残杀威[J]. 分析化学, 2020, 48(3): 396-404. doi: 10.19756/j.issn.0253-3820.191608 shu

Citation: SHI Xiao-Xue, LI Xiu-Qi, WEI Xiao-Ping, LI Jian-Ping. Molecularly Imprinted Photoelectrochemical Sensor Based on AgBiS₂/Bi₂S₃ for Determination of Propoxur[J]. Chinese Journal of Analytical Chemistry, 2020, 48(3): 396-404. doi: 10.19756/j.issn.0253-3820.191608 shu

AgBiS₂/Bi₂S₃分子印迹光电化学传感器用于测定残杀威

桂林理工大学化学与生物工程学院, 广西电磁化学功能物质重点实验室, 桂林 541004
基金项目:
本文系国家自然科学基金项目（No.21765006）、广西自然科学基金项目（Nos.2015GXNSFFA139005，2018GXNSFAA138145）和广西岩溶地区水污染控制与用水安全保障协同创新中心项目资助

摘要: 构建了一种基于AgBiS₂/Bi₂S₃的分子印迹光电化学传感器，用于杀虫剂残杀威的检测。采用溶剂热法，在钛片基底上合成AgBiS₂/Bi₂S₃复合材料。以残杀威为模板分子，邻苯二胺为功能单体，通过电聚合在修饰AgBiS₂/Bi₂S₃复合材料的钛片上电沉积形成分子印迹聚合物膜，可对残杀威产生特异性识别。残杀威与印迹孔穴特异性结合后，阻碍电子供体穿过孔穴到达电极表面，导致光电流降低，据此进行残杀威的检测。残杀威浓度的对数值与光电流在1.0×10^-12~5.0×10^-10 mol/L范围内呈线性关系，检出限为2.3×10^-13 mol/L。将此传感器用于水果等实际样品中残杀威残留的检测，加标回收率介于101.0%~103.1%之间。

关键词:

English

Molecularly Imprinted Photoelectrochemical Sensor Based on AgBiS₂/Bi₂S₃ for Determination of Propoxur

Guangxi Key Laboratory of Electrochemical and Magnetochemacal Function Materials, College of Chemical and Bioengineering, Guilin University of Technology, Guilin 541004, China
Received Date: 16 October 2019
Revised Date: 20 December 2019
Fund Project:
This work was supported by the National Natural Science Foundation of China (No. 21765006) and the Guangxi Natural Science Foundation, China (Nos. 015GXNSFFA139005, 2018GXNSFAA138145).

Abstract: A molecularly imprinted photoelectrochemical sensor based on AgBiS₂/Bi₂S₃ was constructed for detection of insecticide propoxur. AgBiS₂/Bi₂S₃ composites were synthesized on Ti substrate by solvothermal method. Using propoxur as a template molecule and o-phenylenediamine as a functional monomer, a molecularly imprinted polymer film was formed by electropolymerization on Ti modified with AgBiS₂/Bi₂S₃ composite material, which could be used for the specifically recognition of propoxur. The specific binding of propoxur to the imprinted cavity hinders the electron donor from passing through the cavity to the surface of the electrode, resulting in a decrease in photocurrent, and based on this, the detection of propoxur was performed. The logarithm of the concentration of propoxur was linear with the photocurrent in the range of 1.0×10^-12-5.0×10^-10 mol/L, and the detection limit was 2.3×10^-13 mol/L. The sensor was applied to the detection of propoxur residues in actual fruit sample, and the recoveries were 101.0%-103.1%.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

AgBiS₂/Bi₂S₃分子印迹光电化学传感器用于测定残杀威

English

Molecularly Imprinted Photoelectrochemical Sensor Based on AgBiS₂/Bi₂S₃ for Determination of Propoxur

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