TiO2 nanoparticles assembled on graphene oxide nanosheets with high photocatalytic activity for removal of pollutants |
| |
| Authors: | Guodong Jiang Zhifen Lin Chao Chen Lihua Zhu Qing Chang Nan Wang Wei Wei Heqing Tang |
| |
| Affiliation: | aCollege of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;bState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China |
| |
| Abstract: | 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 °C. The two-dimensional porous graphene oxide/TiO2 composites had specific surface area of 80 m2 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. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
