Constructing TiO2/Gr with Rapid Electrons Transfer for Efficiency Photocatalysis

Cheng Hua Tang; Xiao Li Dong; Chun Ma; Xin Xin Zhang; Hong Chao Ma; Xiu Fang Zhang

doi:10.4028/www.scientific.net/AMR.518-523.705

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 518-523Constructing TiO2/Gr with Rapid Electrons Transfer...

Constructing TiO₂/Gr with Rapid Electrons Transfer for Efficiency Photocatalysis

Abstract:

TiO₂/Gr powders were fabricated by hydrothermal method. Their micro-structure was characterized by transmission electron microscopy (TEM). The results revealed TiO₂ particles anchored on the Gr sheets. DRS analysis indicated there was an obvious red shift of the absorption edge of TiO2/Gr compared to that of TiO₂. The experiment of photocatalytic degradation of Rhodamine B (RhB) showed that the degradation rate with TiO₂/Gr was 2.40 times as much as that with TiO₂. The enhanced photocatalytic performance was firstly attrib_{Subscript text}uted to the rapid transfer of the photogenerated electrons from TiO₂ to Gr, which could increase the charge carrier separation, limit their recombination, and enhance the photocatalytic efficiency. Furthermore, the extended light absorption range may also contribute to the enhanced photocatalytic performance.

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Advanced Materials Research (Volumes 518-523)

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705-708

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https://doi.org/10.4028/www.scientific.net/AMR.518-523.705

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May 2012

Authors:

Cheng Hua Tang, Xiao Li Dong, Chun Ma, Xin Xin Zhang, Hong Chao Ma, Xiu Fang Zhang

Keywords:

Photocatalysis, TiO₂, TiO₂/Gr

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