Colorimetric Detection of Hg2+ Based on Enhancement of Peroxidase‐like Activity of Chitosan‐Gold Nanoparticles

Bulletin of the Korean Chemical Society

Zhuojian Li¹  Cuifeng Jiang² 

[1] Materials Science and Chemical Engineering College Anhui Jianzhu University Hefei 230022 People's Republic of China;School of Materials Science and Engineering Yancheng Institute of Technology Yancheng 224051 China

关键词: Chitosan–;    gold nanoparticles;    Hg2+;    Sensor;    Colorimetric;   

DOI  :  10.1002/bkcs.11441

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Hg2+ is a serious environmental contaminant that can cause severe damage to the immune and nervous systems, and Hg2+ monitoring is critical. Herein, we report a novel, simple, and sensitive Hg2+ sensor based on the enhanced peroxidase‐like activity of chitosan–gold nanoparticles (CS‐AuNPs). The peroxidase‐like activity of the CS‐AuNPs can be markedly enhanced by Hg2+ as seen by the deeper color and increased absorbance at 652 nm. This improved catalytic ability was used to develop a sensitive and selective colorimetric sensor for Hg2+ detection. The limit of detection via the absorption spectra is as low as 0.02 μM. The mechanism underlying the enhanced catalytic ability is discussed. This approach is label‐free, simple, and offers detection with the naked eye. Thus, it has potential applications for the detection of Hg2+ in environmental and food samples.

【 授权许可】

Unknown