標題: Au@Cu2O core@shell nanocrystals as dual-functional catalysts for sustainable environmental applications
作者: Kuo, Ming-Yu
Hsiao, Chih-Feng
Chiu, Yi-Hsuan
Lai, Ting-Hsuan
Fang, Mei-Jing
Wu, Jhen-Yang
Chen, Jhih-Wei
Wu, Chung-Lin
Wei, Kung-Hwa
Lin, Hsin-Chieh
Hsu, Yung-Jung
交大名義發表
材料科學與工程學系
National Chiao Tung University
Department of Materials Science and Engineering
關鍵字: Au@Cu2O;Peroxidase mimics;Fenton reaction;Photocatalysis;Sustainable environmental applications
公開日期: 1-Mar-2019
摘要: This work reports the synthesis of Au@Cu2O core@shell nanocrystals with controllable shell thicknesses and demonstrates their use as the dual-functional catalyst that can continuously operate under illumination and darkness conditions for efficient E. con inactivation. On account of the peroxidase mimics of the Au core and Fenton reactivity of the Cu2O shell, the Au@Cu2O nanocrystals exhibit intrinsic peroxidase-like property with the reaction kinetics in accordance with the typical Michaelis-Menten mechanism. On the other hand, time resolved photoluminescence spectra suggest the prevalence of pronounced charge separation for Au@Cu2O nanocrystals, an important advantage that is favourable for photocatalysis. By combining the photocatalytic capability with the peroxidase mimics features, Au@Cu2O nanocrystals can perform practical photocatalytic decomposition of E. coil under visible light illumination but still show vital activity towards E. coil inactivation after light illumination was turned off. The current study delivers a new catalyst configuration by exploiting the multiple functionalities of nanosized Au and Cu2O for advanced environmental and energy conversion applications.
URI: http://dx.doi.org/10.1016/j.apcatb.2018.09.075
http://hdl.handle.net/11536/148461
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2018.09.075
期刊: APPLIED CATALYSIS B-ENVIRONMENTAL
Volume: 242
起始頁: 499
結束頁: 506
Appears in Collections:Articles