Synthesis of TiO2/Bi2O3 Nanocomposites for Visible Light Driven Photocatalytic H2 Production

doi:10.7517/j.issn.1674-0475.2015.05.426

Abstract

Abstract:

Bi₂O₃ nanoparticles were prepared by one-pot water-organic two-phase separated hydrolysis-solvothermal, and then TiO₂ nanoparticles with different molar ratio were loaded on the surface of Bi₂O₃ with facile wet chemical method to prepare TiO₂/Bi₂O₃ nanocomposites. The result of atmosphere controlled surface photovoltage spectrum (SPS) show that Bi₂O₃ loaded with suitable TiO₂ could improve the photoinduced charge separation. Both of visible light driven photocatalytic H₂ production and degradation of organic pollution efficiency of Bi₂O₃ after loaded with TiO₂ promoted significantly, that sample of 7T-B possess of the highest photocatalytic H₂ production efficiency. This may be attributed to the suitable conduction band of TiO₂ which could accept the high energy photoinduced electrons from Bi₂O₃ so that inhibit the recombination of photogenerate electron-hole pairs and maintain the high reduction of the high energy electrons.

Key words: Bi₂O₃, TiO₂/Bi₂O₃nanocomposites, photogenerated charge separation, visible light driven photocatalysis, hydrogen production

SHI Lina, QU Yang, LI Zhijun, SUN Liqun, JING Liqiang. Synthesis of TiO₂/Bi₂O₃ Nanocomposites for Visible Light Driven Photocatalytic H₂ Production[J]. Imaging Science and Photochemistry, 2015, 33(5): 426-433.

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Synthesis of TiO₂/Bi₂O₃ Nanocomposites for Visible Light Driven Photocatalytic H₂ Production

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