文献类型：期刊文献

英文题名：Intrinsic peroxidase-like activity and the catalytic mechanism of gold@carbon dots nanocomposites

作者：Zheng, Cui[1];Ke, Wenjing[1];Yin, Tianixiang[1];An, Xueqin[1]

机构：[1]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：6

期号：42

起止页码：35280

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20161902367717);WOS:【SCI-EXPANDED(收录号:WOS:000374349600016)】；

基金：This research was supported by the National Natural Science Foundation of China (21473055, and 21273073), the National High-Tech R&D (863) Program of China (2011AA06A107), and the Fundamental Research Funds for the Central Universities (No. WJ1516001).

语种：英文

外文关键词：Gold - Catalyst activity - Electron spin resonance spectroscopy - High resolution transmission electron microscopy - Magnetic moments - Carbon - X ray photoelectron spectroscopy - Cyclic voltammetry - Fluorescence spectroscopy - Fourier transform infrared spectroscopy

摘要：Well-dispersed AuNPs@CDs nanocomposites were successfully synthesized from the reduction of chloroauric acid by carbon dots (CDs) at room temperature. The as-prepared AuNPs@CDs were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), and the results indicate AuNPs@CDs nanocomposites with a core-shell structure. The AuNPs@CDs are found to possess intrinsic peroxidase-like activity, and the catalytic activity is higher than that of AuNPs. The mechanism of peroxidase-like activity of AuNPs@CDs was investigated by fluorescence spectroscopy, electron spin resonance and cyclic voltammetry, and it is found that the mechanism could be ascribed to facilitating the electron transfer between TMB and H2O2.