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Issue 11, 2012
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Understanding the formation of CuS concave superstructures with peroxidase-like activity

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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 Fe3O4 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.

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

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Supplementary files

Article information


Submitted
09 Feb 2012
Accepted
08 Mar 2012
First published
14 Mar 2012

Nanoscale, 2012,4, 3501-3506
Article type
Paper

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

W. He, H. Jia, X. Li, Y. Lei, J. Li, H. Zhao, L. Mi, L. Zhang and Z. Zheng, Nanoscale, 2012, 4, 3501
DOI: 10.1039/C2NR30310H

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