A green and facile synthesis of TiO2/graphene nanocomposites and their photocatalytic activity for hydrogen evolution |
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| Authors: | Xiaoyan ZhangYujun Sun Xiaoli Cui Zhiyu Jiang |
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| Affiliation: | a Department of Materials Science, Fudan University, Shanghai 200433, PR China
b Department of Chemistry, Fudan University, Shanghai 200433, PR China |
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| Abstract: | This work reports a green and facile approach to synthesize chemically bonded TiO2/graphene sheets (GS) nanocomposites using a one-step hydrothermal method. The as-prepared composites were characterized by X-ray diffraction, transmission electron microscopy, Raman spectroscopy and ultraviolet visible (UV-Vis) diffuse reflectance spectra. The photocatalytic activity was evaluated by hydrogen evolution from water splitting under UV-Vis light illumination. An enhancement of photocatalytic hydrogen evolution was observed over the TiO2/GS composite photocatalysts, as 1.6 times larger for TiO2/2.0 wt%GS than that of Degussa P25. This fabrication process features the reduction of graphene oxide and formation of TiO2 simultaneously leading to the well dispersion of generated TiO2 nanoparticles on the surface of GS. |
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| Keywords: | Graphene sheets TiO2 Nanocomposites Hydrothermal method Hydrogen evolution |
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