Synthesis and Characterization of Highly Visible-light Active Monoclinic Mesoporous BiVO4

doi:10.3724/SP.J.1077.2011.01256

Abstract

Abstract: Ordered nanocrystalline mesoporous BiVO₄ with pure phase was successfully synthesized at 550℃ via nanocasting using cubic MCM-48 molecular sieves as hard template. The long-range ordered mesostructure was characterized by XRD, TEM, BET as well as UV-Vis spectrophotometer. Compared with the BiVO4 synthesized by conventional hydrothermal method, the nanocasting mesoporous BiVO4 has the average pore diameter of 16.8nm, pore volume of 0.1 cm³/g and specific surface area up to 22.9 m²/g. The structure decreases the recombination of optical excitation electrons and holes efficiently, so the mesoporous BiVO₄ has an excellent photocatalytic activity in the visible light region. As a result, the photocatalytic efficiency of mesoporous BiVO₄ for xanthate in 90min reaches 78%.

Key words: nanocasting, BiVO₄, mesoporous, photocatalysis, MCM-48

CLC Number:

O643

XIAO Qi, GAO Lan, ZHANG Xiang. Synthesis and Characterization of Highly Visible-light Active Monoclinic Mesoporous BiVO₄[J]. Journal of Inorganic Materials, 2011, 26(12): 1256-1260.

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Synthesis and Characterization of Highly Visible-light Active Monoclinic Mesoporous BiVO₄

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