TiO2 nanoparticles assembled on graphene oxide nanosheets with high photocatalytic activity for removal of pollutants

被引：542

作者：

Jiang, Guodong ^{[1
]}

Lin, Zhifen ^{[2
]}

Chen, Chao ^{[1
]}

Zhu, Lihua ^{[1
,2
]}

Chang, Qing ^{[1
]}

Wang, Nan ^{[1
]}

Wei, Wei ^{[1
]}

Tang, Heqing ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Coll Chem & Chem Engn, Wuhan 430074, Peoples R China

[2] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China

来源：

CARBON | 2011年 / 49卷 / 08期

基金：

中国国家自然科学基金;

关键词：

LIQUID-PHASE DEPOSITION; RAMAN-SPECTRA; METHYL-ORANGE; THIN-FILMS; DEGRADATION; CARBON; REDUCTION; TEMPERATURE; PERFORMANCE; INTERFACE;

D O I：

10.1016/j.carbon.2011.02.059

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：

A novel method was developed to synthesize graphite oxide/TiO2 composites as a highly efficient photocatalyst by in situ depositing TiO2 nanoparticles on graphene oxide nano-sheets by a liquid phase deposition, followed by a calcination treatment at 200 degrees C. The two-dimensional porous graphene oxide/TiO2 composites had specific surface area of 80 m(2) g(-1) being considerably larger than that of P25 and the similarly prepared neat TiO2 particles without using graphene oxide. The composites exhibited excellent photocatalytic activity, being influenced by post-calcination temperature, graphene oxide content and solution pH. Under optimal conditions, the photo-oxidative degradation rate of methyl orange and the photo-reductive conversion rate of Cr(VI) over the composites were as high as 7.4 and 5.4 times that over P25, respectively. The excellent enhancing effect of graphene oxide nano-sheets on the photocatalytic properties of TiO2 was attributed to a thin two-dimensional sheet support, a large surface area and much increased adsorption capacity, and the strong electron transfer ability of the thermally reduced graphene oxide in the composite. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2693 / 2701

页数：9

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