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Cui-Feng Jiang,Zhuojian Li,Yinxing Wu,Jinshan Wang,Qiong Jiang 대한화학회 2018 Bulletin of the Korean Chemical Society Vol.39 No.5
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??M. 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.