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Issue 69, 2016, Issue in Progress
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Mechanochemically synthesized CuO/m-BiVO4 composite with enhanced photoelectrochemical and photocatalytic properties

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Abstract

The present work aims to prepare a CuO/monoclinic-BiVO4 (m-BiVO4) composite with large surface area for enhanced photocatalytic performance. Nano-sized m-BiVO4 photocatalysts with a large BET surface area (10 m2 g−1) were first synthesized by a mechanochemical high energy ball milling approach. To further improve the photo-efficiency, 2–10 at% of a p-type CuO co-catalyst was introduced to the surface of BiVO4 by impregnation to constitute the heterostructured composite. The physicochemical properties of the as-prepared composite were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, photoluminescence and surface photovoltage responses. The composite exhibited much higher photocurrents in photoelectrochemical (PEC) tests and faster photocatalytic degradation of rhodamine B upon visible light irradiation in comparison with pristine BiVO4, appearing as a promising visible light active photocatalyst suitable for environmental remediation. The improved PEC and photocatalytic properties can be attributed to the simultaneous enhancement on photon absorption and charge separation. The band structure and possible charge transfer process of the CuO/BiVO4 composite were also elucidated to explain the enhanced photo-activities.

Graphical abstract: Mechanochemically synthesized CuO/m-BiVO4 composite with enhanced photoelectrochemical and photocatalytic properties

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Publication details

The article was received on 24 May 2016, accepted on 03 Jul 2016 and first published on 04 Jul 2016


Article type: Paper
DOI: 10.1039/C6RA13411D
Citation: RSC Adv., 2016,6, 65038-65046
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    Mechanochemically synthesized CuO/m-BiVO4 composite with enhanced photoelectrochemical and photocatalytic properties

    L. Zhang, Q. Luo, X. Chen, M. S. Tse, O. K. Tan, K. H. H. Li, Y. Y. Tay, C. K. Lim, X. Guo and K. C. Leong, RSC Adv., 2016, 6, 65038
    DOI: 10.1039/C6RA13411D

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