Understanding the formation of CuS concave superstructures with peroxidase-like activity

Nanoscale
Weiwei HeZhi Zheng

Abstract

Copper sulfide (CuS) concave polyhedral superstructures (CPSs) have been successfully prepared in an ethanolic solution by a simple solvothermal reaction without the use of surfactants or templates. Two typical well defined, high symmetry CuS concave polyhedrons, forming a concave truncated cuboctahedron and icosahedron were prepared. The effect of the reaction time, temperature and different Cu ion and sulfur sources on the formation of CuS CPSs were investigated and a possible formation mechanism was proposed and discussed based on gas chromatography-mass spectrometry. More importantly, we found, for the first time, that the CuS CPSs exhibit intrinsic peroxidase-like activity, as they can quickly catalyze the oxidation of typical horseradish peroxidase (HRP) substrates, 3,3',5,5'-tetramethylbenzidine (TMB) and o-phenylenediamine (OPD), in the presence of hydrogen peroxide. In addition to the recent discoveries regarding peroxidase mimetics on Fe(3)O(4) NPs and carbon nanostructures, our findings suggest a new kind of candidate for peroxidase mimics. This may open up a new application field of CuS micro-nano structures in biodetection, biocatalysis and environmental monitoring.

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Citations

Feb 28, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiaomei ChenMunetaka Oyama
Jul 30, 2014·Nanoscale·Xianhong RuiQingyu Yan
Aug 13, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Guangdi NieCe Wang
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Mar 4, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiao-Ning WangHong-Cai Zhou

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