Hierarchical Composite of Ag/AgBr Nanoparticles Supported on Bi2MoO6 Hollow Spheres for Enhanced Visible-Light Photocatalytic Performance

被引:69
作者
Tian, Guohui [1 ,2 ]
Chen, Yajie [1 ]
Meng, Xiangying [1 ]
Zhou, Juan [1 ]
Zhou, Wei [1 ]
Pan, Kai [1 ]
Tian, Chungui [1 ]
Ren, Zhiyu [1 ]
Fu, Honggang [1 ]
机构
[1] Heilongjiang Univ, Key Lab Funct Inorgan Mat Chem, Minist Educ Peoples Republ China, Harbin 150080, Peoples R China
[2] Heilongjiang Univ, Sch Chem & Mat Sci, Coll Heilongjiang Prov, Key Lab Chem Engn Proc & Technol High Efficiency, Harbin 150080, Peoples R China
基金
中国博士后科学基金; 高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词
Bi2MoO6 hollow spheres; charge transfer; composites; host-guest systems; photocatalysis; silver; TIO2; PHOTOCATALYST; HIGH CRYSTALLINITY; TITANIA SPHERES; PHOTOVOLTAGE; HETEROSTRUCTURE; DESTRUCTION; NANOPLATE; SYSTEM;
D O I
10.1002/cplu.201200198
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The fabrication of multicomponent composite systems may provide benefits in terms of charge separation and the retardation of charge pair recombination. For this purpose, a hierarchical Ag/AgBr/Bi2MoO6 composite was fabricated by using prepared hierarchical floriated Bi2MoO6 hollow spheres as a supporting material. The interleaved nanoflakes assembled in the hierarchical floriated Bi2MoO6 hollow spheres contributed to the stable deposition of Ag/AgBr nanoparticles and the formation of effective nanojunctions, which led to the low recombination rates of the photoinduced electronhole pairs. The presence of double visible-light-active components in the Ag/AgBr/Bi2MoO6 nanojunction system further broadened the visible-light photoresponse range. As a result, the hierarchical Ag/AgBr/Bi2MoO6 composite exhibited a higher photocatalytic activity than both photocatalysts containing single visible-light-active components and crushed Ag/AgBr/Bi2MoO6 nanoparticles for the degradation of alizarin red S (ARS) and phenol. X-ray photoelectron spectroscopy (XPS) analyses indicated that both AgBr and Ag0 components coexist in the system, and the as-prepared composite is relatively stable. The improved photoinduced charge-transfer properties of the hierarchical Ag/AgBr/Bi2MoO6 composite were investigated by using the transient photovoltage (TPV) technique.
引用
收藏
页码:117 / 123
页数:7
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