Hydrothermal Synthesis and Photocatalytic Properties of Cu-doped BiVO4 Microsheets

doi:10.3724/SP.J.1077.2013.12204

Abstract

Abstract: Using Bi(NO₃)₃·5H₂O, NaVO₃ and Cu(NO₃)₂·3H₂O as raw materials, Cu-doped BiVO₄ microsheets were synthesized by ultrasonic-hydrothermal process with cetyltrimethyl ammonium bromide (CTAB) as template. The as-prepared samples were investigated by XRD, XPS, SEM, HRTEM, UV-Vis and BET tests. The results reveal that uniform and well crystallized Cu/BiVO₄ microsheets in monoclinic crystal structure, with length of 1.0–2.0 μm, width of 0.5–2.0 μm and thickness of 200–300 nm, could be obtained via an ultrasonic-hydrothermal route assisted by 2.0 g CTAB. Compared with BiVO₄ particles, Cu/BiVO₄ nanosheets show a little red shift in the absorption band, resulting in a narrowed band gap (<2.4 eV). For 5.0wt% Cu/ BiVO₄ microsheet, its photodegradation rate constant K is 5.89 ×10^–2 /min and the best photocatalytic activity is found with a 100% degradation of methylene blue (MB) with 10 mg/L concentration under visible-light irradiation for 60 min.

Key words: hydrothermal method, Cu/BiVO₄, microsheets, photocatalysis

CLC Number:

O643

LIU Guo-Cong, JING Zhen, ZHANG Xi-Bing, LI Xian-Feng, LIU Hong. Hydrothermal Synthesis and Photocatalytic Properties of Cu-doped BiVO₄ Microsheets[J]. Journal of Inorganic Materials, 2013, 28(3): 287-292.

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Hydrothermal Synthesis and Photocatalytic Properties of Cu-doped BiVO₄ Microsheets

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