一种基于碳载铋锡纳米粒子的新型传感器，用于灵敏地电化学测定镉（II）离子。

A carbon-supported BiSn nanoparticles based novel sensor for sensitive electrochemical determination of Cd (II) ions.

作者信息

Chen Yongjia, Zhang Dongtang, Wang Dumei, Lu Liping, Wang Xiayan, Guo Guangsheng

机构信息

Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, PR China.

出版信息

Talanta. 2019 Sep 1;202:27-33. doi: 10.1016/j.talanta.2019.04.066. Epub 2019 Apr 24.

DOI:10.1016/j.talanta.2019.04.066

PMID:31171181

Abstract

A novel sensor based on carbon supported BiSn alloy nanoparticles (BiSn@C) was prepared for the sensitive detection of Cd. The BiSn@C and Nafion modified glassy carbon electrode (GCE) exhibited improved electrochemical performance in Cd detection, because of its large specific surface area, abundance of active sites, good electrical conductivity, and strong cation exchange ability. Under the optimum conditions, the fabricated sensor showed good linearity of its response from 0.01 μmol/L to 30 μmol/L for the detection of Cd and a limit of detection (LOD) of 3 nmol/L, which is considerably lower than the limit specified for safe drinking water as guided by the World Health Organization. The Nafion/BiSn@C/GCE was successfully applied for determination for trace Cd in river samples with satisfying recoveries using the standard addition method.

摘要

制备了一种基于碳载铋锡合金纳米颗粒（BiSn@C）的新型传感器，用于镉的灵敏检测。BiSn@C和Nafion修饰的玻碳电极（GCE）在镉检测中表现出改善的电化学性能，这归因于其大的比表面积、丰富的活性位点、良好的导电性和强的阳离子交换能力。在最佳条件下，所制备的传感器对镉检测的响应在0.01 μmol/L至30 μmol/L范围内表现出良好的线性，检测限（LOD）为3 nmol/L，这大大低于世界卫生组织指导的安全饮用水规定限值。采用标准加入法，Nafion/BiSn@C/GCE成功应用于河水样品中痕量镉的测定，回收率令人满意。