Visible Photocatalytic Activity Enhancement of ZnWO4 by Graphene Hybridization

被引：259

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：

美国国家科学基金会; 国家高技术研究发展计划(863计划);

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

页码：2769 / 2778

页数：10

共 66 条

[61] TiO2-Graphene Nanocomposites for Gas-Phase Photocatalytic Degradation of Volatile Aromatic Pollutant: Is TiO2-Graphene Truly Different from Other TiO2-Carbon Composite Materials? [J].

Zhang, Yanhui ;

Tang, Zi-Rong ;

Fu, Xianzhi ;

Xu, Yi-Jun .

ACS NANO, 2010, 4 (12) :7303-7314

[62] Experimental observation of the quantum Hall effect and Berry's phase in graphene [J].

Zhang, YB ;

Tan, YW ;

Stormer, HL ;

Kim, P .

NATURE, 2005, 438 (7065) :201-204

[63] One-Step Solvothermal Synthesis of a Carbon@TiO2 Dyade Structure Effectively Promoting Visible-Light Photocatalysis [J].

Zhao, Li ;

Chen, Xiufang ;

Wang, Xinchen ;

Zhang, Yuanjian ;

Wei, Wei ;

Sun, Yuhan ;

Antonietti, Markus ;

Titirici, Maria-Magdalena .

ADVANCED MATERIALS, 2010, 22 (30) :3317-+

[64] Synergetic degradation of rhodamine B at a porous ZnWO4 film electrode by combined electro-oxidation and photocatalysis [J].

Zhao, Xu ;

Zhu, Yongfa .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (10) :3367-3372

[65] Study on the effect of EDTA on the photocatalytic reduction of mercury onto nanocrystalline titania using quartz crystal microbalance and differential pulse voltammetry [J].

Zhou, Jianhong ;

Deng, Chunyan ;

Si, Shihui ;

Shi, Yun ;

Zhao, Xueliang .

ELECTROCHIMICA ACTA, 2011, 56 (05) :2062-2067

[66] Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst [J].

Zou, ZG ;

Ye, JH ;

Sayama, K ;

Arakawa, H .

NATURE, 2001, 414 (6864) :625-627

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