Enhanced photocatalytic degradation of methylene blue under visible irradiation on graphene@TiO2 dyade structure
Enhanced photocatalytic degradation of methylene blue under visible irradiation on graphene@TiO2 dyade structure
复制标题
可见光照射下石墨烯@TiO2二元体结构增强光催化降解亚甲基蓝
DOI：
10.1016/j.apcatb.2011.10.012
复制
发表时间：
2012-01-12
影响因子：
22.1
通讯作者：
Wang, Xiangke
中科院分区：
文献类型：
--
作者：
Zhao, Donglin;Sheng, Guodong;Wang, Xiangke
Electron-hole recombination limits the efficiency of TiO2. We have investigated the efficacy with which the graphene@TiO2 "dyade"-like structure reduced charge recombination and enhanced reactivity. A visible-light photocatalysis of graphene@TiO2 "dyade"-like structure was synthesized, and photocatalytic degradation of organic compounds over the UV and visible-light spectrum regions was investigated. The graphene@TiO2 had anatase phase and was able to absorb a high amount of photo energy in the visible-light region, driving effectively photochemical degradation reactions. There were more (OH)-O-center dot radicals produced by the graphene@TiO2 (1:3) than by pure TiO2 under UV and visible-light irradiation. Graphene can enhance the photocatalytic activity of TiO2 in two aspects, namely, e(-) transportation and adsorption. This work provides new insight into the fabrication of graphene@TiO2 as a high performance visible-light photocatalyst and facilitates its application in photocatalytic degradation of organic compounds. (C) 2011 Elsevier B.V. All rights reserved.
