Understanding Reaction Kinetics by Tailoring Metal Co-catalysts of the BiVO4 Photocatalyst | Zendy

Hye Rin Choe | Zendy; Ji Hyeon Kim | Zendy; Ahyeon Ma | Zendy; Haeun Jung | Zendy; Ha Young Kim | Zendy; Ki Min Nam | Zendy

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Understanding Reaction Kinetics by Tailoring Metal Co-catalysts of the BiVO₄ Photocatalyst

Author(s) -

Hye Rin Choe,

Ji Hyeon Kim,

Ahyeon Ma,

Haeun Jung,

Ha Young Kim,

Ki Min Nam

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.9b02454

Subject(s) - photocatalysis , kinetics , catalysis , metal , chemical kinetics , materials science , chemical engineering , chemistry , nanotechnology , metallurgy , physics , engineering , organic chemistry , quantum mechanics

In this study, the reaction mechanisms of metal-semiconductor composites used as photocatalysts were demonstrated by first preparing bismuth vanadate (BiVO 4 ) and then performing photodeposition of metal nanoparticles. The photocatalytic activity of metal-BiVO 4 (M-BiVO 4 , where M = Pt, Au, Ag) composites were evaluated through dye decomposition under UV-vis irradiation. The photocatalytic efficiency was significantly enhanced after Pt deposition as compared to other M-BiVO 4 composites. The size or shape of BiVO 4 was not the main factor for the efficiency of Pt-BiVO 4 . However, a deposited Pt co-catalyst was essential for the photocatalytic decomposition of dye on the BiVO 4 surface. Radical scavengers were employed to elucidate the reaction mechanism during the photocatalytic reaction with the Pt-BiVO 4 composite. This study provides details on the reaction mechanism of the photocatalytic reaction on Pt at the BiVO 4 surface under solar irradiation.

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