文献类型：期刊文献

英文题名：Synthesis and photocatalytic activity of graphene based doped TiO2 nanocomposites

作者：Gu, Yongji[1,2];Xing, Mingyang[1,2];Zhang, Jinlong[1,2,3]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

年份：2014

卷号：319

期号：1

起止页码：8

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20143600008018);WOS:【SCI-EXPANDED(收录号:WOS:000344616000003)】；

基金：This work has been supported by the National Nature Science Foundation of China (21173077, 21377038, 21203062 and 21237003); the National Basic Research Program of China (973 Program, (2013CB632403), the Project of International Cooperation of the Ministry of Science and Technology of China (No. 2011DFA50530); Science and Technology Commission of Shanghai Municipality (12230705000, 12XD1402200); the Research Fund for the Doctoral Program of Higher Education (20120074130001) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Graphene; N-TiO2-RGO; N,V-TiO2-RGO; Hydrothermal; Photocatalytic activity

摘要：The nanocomposites of reduced graphene oxide based nitrogen doped TiO2 (N-TiO2-RGO) and reduced graphene oxide based nitrogen and vanadium co-doped TiO2 (N, V-TiO2-RGO) were prepared via a facile hydrothermal reaction of graphene oxide and TiO2 in a water solvent. In this hydrothermal treatment, the reduction of graphene oxide and the intimate contact between nitrogen doped TiO2 (N-TiO2) or nitrogen and vanadium co-doped TiO2(N, V-TiO2) and the RGO sheet is achieved simultaneously. Both N-TiO2-RGO and N, V-TiO2-RGO nanocomposites exhibit much higher visible light photocatalytic activity than N-TiO2 and N, V-TiO2, and the order of visible light photocatalytic activity is N,V-TiO2-RGO>N-TiO2-RGO>N,V-TiO2>N-TiO2>TiO2. According to the characterization, the enhanced photocatalytic activity of the nanocomposites is attributed to reasons, such as enhancement of adsorption of pollutants, light absorption intensity, minimizing the recombination of photoinduced electrons and holes and more excited states of these nanocomposites under visible light irradiation. Overall, this work provides a more marked contrast of graphene based semiconductor nanocomposites and a more comprehensive explanation of the mechanism. (C) 2014 Elsevier B. V. All rights reserved.