• 文献标题:   Synergetic adsorption and photocatalytic degradation of pollutants over 3D TiO2-graphene aerogel composites synthesized via a facile one-pot route
  • 文献类型:   Article
  • 作  者:   ZHANG JJ, WU YH, MEI JY, ZHENG GP, YAN TT, ZHENG XC, LIU P, GUAN XX
  • 作者关键词:  
  • 出版物名称:   PHOTOCHEMICAL PHOTOBIOLOGICAL SCIENCES
  • ISSN:   1474-905X EI 1474-9092
  • 通讯作者地址:   Zhengzhou Univ
  • 被引频次:   23
  • DOI:   10.1039/c6pp00133e
  • 出版年:   2016

▎ 摘  要

A series of composites consisting of anatase TiO2 nanocrystals and three-dimensional (3D) graphene aerogel (TiO2-GA) were self-assembled directly from tetrabutyl titanate and graphene oxides via a one-pot hydrothermal process. TiO2 was found to uniformly distribute inside the 3D network of GA in the resulting composites with large surface areas (S-BET > 125 m(2) g(-1)) and high pore volumes (V-p > 0.22 cm(3) g(-1)). In comparison with GA and TiO2, the composites possessed much higher adsorption capacities and visible light photocatalytic activity in the degradation of rhodamine B (RhB). With an initial concentration of 20.0 mg L-1 of RhB, the adsorptive decolourization of RhB was as high as 95.1% and the total decolourization value reached up to 98.7% under visible light irradiation over 5.0 mg of the resulting composites. It was elucidated that the physical and chemical properties of the TiO2-GA composites could be ascribed to their unique 3D nanoporous structure with high surface areas and the synergetic activities of graphene nanosheets and TiO2 nanoparticles.