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Chemical state and local structure of V species incorporated in δ-Bi2O3 photocatalysts

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Abstract

Herein, the delta phase bismuth oxide (δ-Bi2O3) with high crystallinity can be obtained at room temperature through a sol–gel route in the presence of VO3 −. The as-synthesized δ-Bi2O3 photocatalysts are characterized using synchrotron-based techniques, including ultraviolet photoelectron spectroscopy, X-ray absorption near edge structure, and extended X-ray absorption fine structure. Results show that V species plays a key role in stabilizing the δ phase of Bi2O3. With increasing V/Bi molar ratio, crystallinity, light absorption ability, and specific surface area increase. The V species predominantly exists in the +5 oxidation state, irrespective of V loading amount, and is tetrahedrally coordinated to four O atoms with a bond length of 1.716 Å. The δ-Bi2O3 photocatalysts show appreciable visible light activity for the decomposition of atenolol, an important β-blocker drug.

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Acknowledgements

This work is supported by Ton Duc Thang University. The Synchrotron Light Research Institute (Public Organization) is acknowledged for providing beamtime at BL3.2a:PES and BL8:XAS. Thanks also go to K. Hirano and S. Kawaguchi of Kyushu University for fruitful discussions and M. Asnal for technical assistance.

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Authors and Affiliations

  1. Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, 70000, Vietnam

    Hanggara Sudrajat

  2. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, 70000, Vietnam

    Hanggara Sudrajat

  3. Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand

    Hanggara Sudrajat

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  1. Hanggara Sudrajat
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Correspondence to Hanggara Sudrajat.

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Sudrajat, H. Chemical state and local structure of V species incorporated in δ-Bi2O3 photocatalysts. J Mater Sci 53, 1088–1096 (2018). https://doi.org/10.1007/s10853-017-1565-9

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  • DOI: https://doi.org/10.1007/s10853-017-1565-9

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