Visible Photocatalytic Activity Enhancement of ZnWO4 by Graphene Hybridization

被引：257
|
作者：
Bai, Xiaojuan [1 ]
Wang, Li [1 ]
Zhu, Yongfa [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Beijing 10084, Peoples R China
来源：
ACS CATALYSIS | 2012年 / 2卷 / 12期
基金：
国家高技术研究发展计划(863计划); 美国国家科学基金会;
关键词：
photocatalysis; ZnWO4; graphene; hybridization; TIO2-GRAPHENE NANOCOMPOSITES; ORGANIC CONTAMINANTS; CHARGE-TRANSFER; LIGHT; DEGRADATION; OXIDE; TIO2; ZNO; REDUCTION; COMPOSITE;
D O I：
10.1021/cs3005852
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：
ZnWO4/graphene hybride (GZW-X) photocatalysts were synthesized via a facile in situ reduction of graphene oxide and ZnWO4 in water. High efficiency for the degradation of methylene blue (MB) under both UV light and visible light was obtained for the GZW-X photocatalysts. The photocatalytic efficiency of ZnWO4/graphene-0.2 wt % under visible-light and UV-light irradiation was similar to 7.1 and 2.3 times that of pristine ZnWO4, respectively. The visible photocatalytic activity originated from the (OH)-O-center dot and O-2(center dot-), which were formed by. photosensitization of graphene in ZnWO4/graphene. The enhancement of UV photocatalytic light activity in ZnWO4/graphene was attributed to the high separation efficiency of photoinduced electron-hole pairs resulting from the promotion of HOMO orbit of graphene in ZnWO4/graphene.
引用
收藏
页码：2769 / 2778
页数：10
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