Photocatalytic H2 Evolution from Glycerol Solution over Bi3+-doped TiO2 Nanoparticles

doi:10.3724/SP.J.1077.2012.12142

Abstract

Abstract: TiO₂ and Bi³⁺-doped TiO₂ semiconductors were prepared by using Sol-Gel method. Their pore size distribution, crystal structure, surface composition, photo absorption properties and photocatalytic performance for H₂ evolution from glycerol solution were investigated by techniques of N₂ adsorption-desorption, XRD, FT-Raman, SEM, UV-Vis DRS and photocatalytic reaction. The results show that Bi³⁺-doped TiO₂ appears anatase phase nanoparticles with mesoporous structure and has a much smaller crystallite size and much higher BET surface area than bare TiO₂. These samples exhibit a visible-light absorption capability much higher than bare TiO₂, which mainly originates from the doping process with the formation of new energy level of Bi³⁺ between conduction band and valence band of TiO₂ to reduce the energy gap and the electron–hole recombination rate. The Bi³⁺-doped TiO₂ samples display improved photocatalytic H₂ production from glycerol solution, and 2%Bi-doped TiO₂ shows a maximum H₂ production rate of 3534.8 μmol/(h·gcat) under UV irradiation and 455.7 μmol/(h·gcat) under simulated-solar irradiation, respectively.

Key words: Bi³⁺-dope TiO₂ nanoparticle, photocatalysis, glycerol solution, H₂ production

CLC Number:

O643

SANG Huan-Xin, TIAN Ye, WANG Xi-Tao, TAO Lei. Photocatalytic H2 Evolution from Glycerol Solution over Bi³⁺-doped TiO₂ Nanoparticles[J]. Journal of Inorganic Materials, 2012, 27(12): 1283-1288.

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Photocatalytic H2 Evolution from Glycerol Solution over Bi³⁺-doped TiO₂ Nanoparticles

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