Photonic crystal coupled porous BiVO sub(4) hybrid for efficient photocatalysis under visible light irradiation

A bilayer TiO sub(2) photonic crystal (PC)/porous BiVO sub(4) was constructed by using liquid-phase deposition (LPD) and spin coating method for the enhancement of visible-light-driven photocatalytic ability by the improvement of light absorbance. Crystal form, morphology, film thickness, and light...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014-09, Vol.2 (41), p.17366-17370
Main Authors: Huo, Tianyu, Zhang, Xiufang, Dong, Xiaoli, Zhang, Xinxin, Ma, Chun, Wang, Guowen, Ma, Hongchao, Xue, Mang
Format: Article
Language:English
Subjects:
Absorbance
Film thickness
Light absorption
Photocatalysis
Photonic crystals
Polycarbonates
Spin coating
Titanium dioxide
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Summary:A bilayer TiO sub(2) photonic crystal (PC)/porous BiVO sub(4) was constructed by using liquid-phase deposition (LPD) and spin coating method for the enhancement of visible-light-driven photocatalytic ability by the improvement of light absorbance. Crystal form, morphology, film thickness, and light absorption performance were investigated. The photocatalytic activity of the bilayer TiO sub(2) PC/porous BiVO sub(4) film was evaluated by the degradation of MB and was compared with that of porous BiVO sub(4) film. The effect of the film thickness of the porous BiVO sub(4) on its photocatalytic ability was determined. It was found that the film thickness significantly affected the light absorption, and therefore its photocatalytic ability. The bilayer film with 1.03 mu m of thickness of porous BiVO sub(4) film exhibited the highest photocatalytic performance. The photocatalytic ability of porous BiVO sub(4) was enhanced by combination with a TiO sub(2) PC layer as the back reflector. This increase could be attributed to the intensified light absorbance produced by reflection from the TiO sub(2) PC layer. The effects of porous structure and the application of photoelectrocatalytic process on the photocatalytic performance were also discussed.
ISSN:2050-7488
2050-7496
DOI:10.1039/c4ta04178j