准二维杂化铅铯溴钙钛矿-分子印迹光电化学传感器检测蔬菜中氯氰菊酯残留  

Application of Quasi-2D Hybrid Halide Perovskite-Molecularly Imprinting Photoelectrochemical Sensor for Determination of Cypermethrin in Vegetables

作　　者：陈小锋[1] 秦吉 陆国超 李明[1] 何海平[2,3] CHEN Xiao-Feng;QIN Ji;LU Guo-Chao;LI Ming;HE Hai-Ping(School of Environmental Science and Engineering,Yangzhou University,Yangzhou 225127,China;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310030,China;Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030001,China)

机构地区：[1]扬州大学环境科学与工程学院,扬州225127 [2]浙江大学材料科学与工程学院,杭州310030 [3]山西浙大新材料与化工研究院,太原030001

出　　处：《分析化学》2024年第11期1669-1677,共9页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.52072337);山西-浙大新材料与化工研究院项目(No.2022SZ-TD004)资助。

摘　　要：采用液相法在氧化铟锡(ITO)玻璃表面制备出准二维有机杂化铅铯溴型钙钛矿薄膜(OLHP/ITO),并以氯氰菊酯为模板分子、甲基丙烯酸六氟丁酯为单体、二乙烯苯为交联剂、偶氮二异丁腈为光引发剂,通过紫外光聚合获得了可特异性识别氯氰菊酯的钙钛矿-分子印迹修饰电极(MIP/OLHP/ITO)。扫描电子显微镜、X射线衍射和接触角等测试结果表明,所制备的修饰电极表面结构平整、缺陷小、光电效应强、耐湿性能良好,基于此构建了检测氯氰菊酯的光电化学传感器。在1.0×10^(-6)~1.0×10^(-10)mol/L范围内,氯氰菊酯浓度的对数与传感器的光电流差值(ΔI)呈良好的线性关系,线性方程为ΔI=9.911 lgC+102.83(R^(2)=0.997),检出限为5.17×10^(-11)mol/L(S/N=3)。所构建的光电化学传感器具有良好的选择性、重现性和稳定性,并被成功用于实际蔬菜样品中氯氰菊酯的测定。本研究为氯氰菊酯残留的测定提供了一种快速、简便的方法,也为准二维有机杂化铅铯溴钙钛矿材料在污染物分析中的应用提供了新思路。Quasi-2D hybrid lead cesium bromide perovskite thin films were prepared on ITO glass (OLHP/ITO)by liquid-phase method. On this basis, by using cypermethrin as the template molecule, hexafluorobutylmethacrylate as the monomer, divinylbenzene as the crosslinking agent, and 2,2′-azobisisobutyronitrile (AIBN) asphotoinitiators, the perovskite molecularly imprinted modified electrode (MIP/OLHP/ITO) that could specificallyrecognize cypermethrin was obtained through UV polymerization. The results of scanning electron microscopy,X-ray diffraction and other tests indicated that the prepared modified electrode had a flat structure, small defects,strong photoelectric effect, and good moisture resistance. Inthe range of1.0×10^(-6)–1.0×10^(-10) mol/L,the logarithmofthe concentration of cypermethrin exhibited a good linear relationship with the difference between thephotocurrents of the standard samples and the blank (ΔI). The linear equation was ΔI=9.911lgC+102.83(R^(2)=0.997), and the limit of detection was 5.17×10^(-11) mol/L (S/N=3). In addition, the results of interferenceexperiments, repeatability experiments, and spiked recovery experiments indicated that the constructed MIP/OLHP/ITO photoelectrochemical sensor had good selectivity, reproducibility and stability, and could be applied todetermination of cypermethrin in actual vegetable samples. In summary, this study provided a rapid and simplemethod for determination of cypermethrin residual, and offered a new approach for application of quasi-2D organichybrid lead cesium bromide perovskites in pollutant analysis.

关 键 词：钙钛矿 分子印迹 光电化学传感器 氯氰菊酯 

分 类 号：O657.1[理学—分析化学] TS255.7[理学—化学] TP212[轻工技术与工程—农产品加工及贮藏工程]