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Preparation of BiVO4 nanoporous photoanode based on peroxovanadate reduction and conversion for efficient photoelectrochemical performance

Abstract

A unique, controllable and facile method based on peroxovanadate reduction and conversion to prepare BiVO4 nanoporous film was presented. In this method, a slow and controllable reduction of peroxovanadate by ethonal was used, which was the crucial step to ensure the uniform deposition of V2O5 •xH2O on F-doped tin oxide substrate, and subsquently the annealed V2O5 •xH2O film was converted to BiVO4 film by a simple impregnation method with Bi3+ under the oriented effect of polyethylene glycol. The converted BiVO4 film possessed single monoclinic scheelite structure and exhibited the optimal water splitting photocurrent density of 1.10 mA/cm2 at 1.23 V vs RHE in 0.1 M KH2PO4 (pH 7) under AM 1.5G illumination with an incident photon-to-current conversion efficiency of ∼22.4% at 400 nm using annealed V2O5 •xH2O film deposited for 3 hours. The BiVO4 film also showed excellent water splitting performance and degradation efficiency in the PEC degradation of methylene blue and tetracycline hydrochloride with rate constant of 0.63 h-1 and 0.21 h-1, respectively.

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Publication details

The article was received on 11 Oct 2017, accepted on 27 Dec 2017 and first published on 28 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR07566A
Citation: Nanoscale, 2017, Accepted Manuscript
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    Preparation of BiVO4 nanoporous photoanode based on peroxovanadate reduction and conversion for efficient photoelectrochemical performance

    L. Xia, J. Li, J. Bai, L. Li, Q. Zeng and B. Zhou, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07566A

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