• 文献标题:   Mesoporous anatase TiO2/reduced graphene oxide nanocomposites: A simple template-free synthesis and their high photocatalytic performance
  • 文献类型:   Article
  • 作  者:   ZHOU Q, ZHONG YH, CHEN X, HUANG XJ, WU YC
  • 作者关键词:   semiconductor, composite, nanostructure, solvothermal, catalytic propertie
  • 出版物名称:   MATERIALS RESEARCH BULLETIN
  • ISSN:   0025-5408 EI 1873-4227
  • 通讯作者地址:   Hefei Univ Technol
  • 被引频次:   17
  • DOI:   10.1016/j.materresbull.2013.12.034
  • 出版年:   2014

▎ 摘  要

Mesoporous anatase phase TiO2 was assembled on reduced graphene oxide (rGO) using a template-free one-step hydrothermal process. The nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron, spectroscopy (XPS), Raman spectroscopy, and Brunauer-Emmett-Teller (BET) surface area. Morphology of TiO2 was related to the content of graphene oxide. TiO2/rGO nanocomposites exhibited excellent photocatalytic activity for the photo-degradation of methyl orange. The degradation rate was 4.5 times greater than that of pure TiO2 nanoparticles. This difference was attributed to the thin two-dimensional graphene sheet. The graphene sheet had a large surface area, high adsorption capacity, and acted as a good electron acceptor for the transfer of photo-generated electrons from the conduction band of TiO2. The enhanced surface adsorption characteristics and excellent charge transport separation were independent properties of the photocatalytic degradation process. (C) 2014 Elsevier Ltd. All rights reserved.