Performance Enhancement of ZnO Photocatalyst via Synergic Effect of Surface Oxygen Defect and Graphene Hybridization

被引：473

作者：

Bai, Xiaojuan ^{[1
]}

Wang, Li ^{[1
]}

Zong, Ruilong ^{[1
]}

Lv, Yanhui ^{[1
]}

Sun, Yiqing ^{[1
]}

Zhu, Yongfa ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

LANGMUIR | 2013年 / 29卷 / 09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：

COMPOSITE; TIO2; NANOCRYSTALS; DEGRADATION; STORAGE; OXIDE; NANOCOMPOSITES; DISPERSIONS; KINETICS; CARBON;

D O I：

10.1021/la4001768

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

ZnO1-x/graphene hybrid photocatalyst was prepared via a facile in-situ reduction of graphene oxide and ZnO1-x surface defect oxide. The hybrid photocatlayst showed enhanced photocatalytic activity for the photodegradation of methylene blue. The photocorrosion of ZnO1-x was successfully inhibited by graphene hybridation. ZnO1-x/graphene hybrid photocatalyst with 1.2 wt % graphene showed the optimized photocatalytic activity. The photocatalytic activity of ZnO1-x/graphene-1.2 wt % under visible and UV light was about 4.6 and 1.2 times that of ZnO1-x sample, respectively. The photocurrent intensity of ZnO1-x under visible and UV light irradiation can be enhanced by 2 and 3.5 times by graphene hybridization. The enhancement of photocatalytic activity and photocurrent intensity in ZnO1-x/graphene was attributed to the synergistic effect between graphene and ZnO1-x for high separation efficiency of photoinduced electron-hole pairs mainly resulting from the promotion of HOMO orbit of graphene and the O-i '' defect level of ZnO1-x in ZnO1-x/graphene.

引用

页码：3097 / 3105

页数：9

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