Synthesis and photocatalytic application of Au/Ag nanoparticle-sensitized ZnO films

被引:82
作者
Chen, Lan [1 ]
Tran, ThanhThuy T. [1 ,2 ]
Huang, Chen'an [1 ]
Li, Jiezhen [1 ]
Yuan, Lijuan [1 ]
Cai, Qingyun [1 ]
机构
[1] Hunan Univ, Dept Chem, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[2] Ind Univ Ho Chi Minh City, Dept Chem, Ho Chi Minh City, Vietnam
基金
美国国家科学基金会;
关键词
ZnO; Nanosheets; Au; Ag; Photocatalytic; Methyl orange (MO); SURFACE-PLASMON RESONANCE; THIN-FILMS; OPTICAL-PROPERTIES; AZO-DYE; TIO2; DEGRADATION; SILVER; LIGHT; SPECTROSCOPY; GROWTH;
D O I
10.1016/j.apsusc.2013.01.184
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Here it is demonstrated that the Au-Ag-ZnO architecture can be immobilized on indium tin oxide (ITO) substrate through a facile three-step synthesis approach. A series of ZnO films with different modifications of Au and Ag were applied to study the effect of Ag and Au nanoparticles on the morphology, optical properties and photocatalytic activity. An annealing treatment of the ZnO nanosheets before Ag-Au deposition is found to play an important role in the properties of the Au-Ag-deposited ZnO nanosheet (Au-Ag-ZnO). The annealing treatment results in a significant increase in the surface area of ZnO, and consequently an increase in the depositing amount of Ag nanoparticles. The Au-Ag-ZnO film shows nearly twice the photocatalytic efficiency than pure ZnO, and much higher efficiency comparing with the Ag-ZnO film in the photocatalytic degradation of methyl orange (MO) under UV illumination in aqueous solutions. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码:82 / 88
页数:7
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