Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



pH-dependent Photocatalytic Performance of Modified Bismuth Vanadate by Bismuth Ferrite

Abstract

The photoelectrochemical (PEC) performance of bismuth vanadate (BVO) as a promising photocatalysts for water splitting is limited due to the poor charge mobility and significant recombination of electron-hole pairs. Here, we demonstrate that depositing a thin layer of bismuth ferrite (BFO) on the surface of bismuth vanadate (BVO) improved the PEC performance and photocatalytic activity of BVO/BFO over all pH range. The BVO/BFO heterojunction exhibited higher photocurrent density and a 0.3 V cathodic shift of the onset potential compared to pure BVO. Moreover, a pH-dependent PEC performance found for BVO/BFO so that with increasing of the pH for BVO/BFO the photocurrent density decreased, while the PEC performance increased for pure BVO photoelectrode. Interestingly, potential recovery in open current configuration indicated a fast recovery of potential for BVO/BFO compared to BVO, suggesting that the BFO layer in the BVO/BFO heterojunction induces a rapid charge transfer into the electrolyte solution. Electrochemical impedance spectroscopy (EIS) and Mott Schottky measurements indicated that the improved PEC performance of the BVO/BFO heterojunction attributed to the reduced charge-transfer resistance and the increased donor concentration after BFO deposition on the BVO/BFO heterojunction. Furthermore, we measured photocatalytic activity of BVO/BFO catalysts with degradation of tetracycline (TC) under visible light irradiation. The results showed a higher activity for BVO/BFO catalysts compared to BVO or BFO catalysts over all pH range.

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Jan 2019, accepted on 10 May 2019 and first published on 10 May 2019


Article type: Paper
DOI: 10.1039/C9NJ00214F
New J. Chem., 2019, Accepted Manuscript

  •   Request permissions

    pH-dependent Photocatalytic Performance of Modified Bismuth Vanadate by Bismuth Ferrite

    M. Tayebi, A. Tayyebi, T. Soltani and B. Lee, New J. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9NJ00214F

Search articles by author

Spotlight

Advertisements