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Open AccessArticle

The Enzyme-Like Property and Photocatalytic Effect on α, α-Diphenyl-β-Picrylhydrazyl (DPPH) of CuPt Nanocomposite

Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Catalysts 2019, 9(10), 813; https://doi.org/10.3390/catal9100813
Received: 31 August 2019 / Revised: 19 September 2019 / Accepted: 26 September 2019 / Published: 27 September 2019
(This article belongs to the Special Issue State-of-the-Art Photocatalytical Technology in North America)
With co-reduction method, a new nanocomposite consisting of Cu and Pt (CuPt) was prepared in household. The morphology of CuPt alloy was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). The diameter of CuPt was ca. 125 nm measured by dynamic light scattering (DLS). The atom ratio of Cu to Pt was determined to be about 1.2 by energy-dispersive X-ray (EDX). Enzyme-like activities of CuPt, including peroxidase (POD)-like and ascorbic acid oxidase (AAO)-like activities were examined with UV-Vis-NIR spectrometer. The CuPt was found to interact with α, α-diphenyl-β-picrylhydrazyl (DPPH) in the presence or absence of AA. With irradiation by light emitting diode (LED) light, the photocatalysis effect of CuPt on DPPH was investigated. With the addition of histidine, it was proved that singlet oxygen had an important role in the interaction involving CuPt. The new nanocomposite and the properties suggest various potentials of application. View Full-Text
Keywords: CuPt; peroxidase (POD)-like; ascorbic acid oxidase (AAO)-like; DPPH CuPt; peroxidase (POD)-like; ascorbic acid oxidase (AAO)-like; DPPH
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Wen, T.; Yan, D.; Meng, J.; Liu, J.; Xu, H. The Enzyme-Like Property and Photocatalytic Effect on α, α-Diphenyl-β-Picrylhydrazyl (DPPH) of CuPt Nanocomposite. Catalysts 2019, 9, 813.

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