Synergetic adsorption and photocatalytic degradation of pollutants over 3D TiO2-graphene aerogel composites synthesized: Via a facile one-pot route

Jing Jie Zhang, Yu Hui Wu, Jin Ya Mei, Guangping Zheng, Ting Ting Yan, Xiu Cheng Zheng, Pu Liu, Xin Xin Guan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

A series of composites consisting of anatase TiO2nanocrystals and three-dimensional (3D) graphene aerogel (TiO2-GA) were self-assembled directly from tetrabutyl titanate and graphene oxides via a one-pot hydrothermal process. TiO2was found to uniformly distribute inside the 3D network of GA in the resulting composites with large surface areas (SBET> 125 m2g-1) and high pore volumes (Vp> 0.22 cm3g-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-1of 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 TiO2nanoparticles.
Original languageEnglish
Pages (from-to)1012-1019
Number of pages8
JournalPhotochemical and Photobiological Sciences
Volume15
Issue number8
DOIs
Publication statusPublished - 1 Jan 2016

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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