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Title: Enhanced Photocatalytic Activity of BiVO4/Bi2S3/SnS2 Heterojunction under Visible Light
Authors: Meng, Sopheak
Ogawa, Takaya  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-8273-964X (unconfirmed)
Okumura, Hideyuki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-2576-7510 (unconfirmed)
Ishihara, Keiichi N.
Author's alias: 小川, 敬也
奥村, 英之
石原, 慶一
Keywords: BiVO4/Bi2S3/SnS2 heterojunction
visible light
Z-scheme
Issue Date: 9-Nov-2020
Publisher: MDPI AG
Journal title: Catalysts
Volume: 10
Issue: 11
Thesis number: 1294
Abstract: Heterojunction photocatalysts have attracted a significant amount of attention due to their advantages over a single photocatalyst and, particularly, their superior spatial charge separation. Herein, the BiVO4/Bi2S3/SnS2 heterojunction was synthesized via solvothermal synthesis with different ratios of BiVO4 to SnS2. The photodegradation rate of the 0.03 BiVO4/SnS2 sample for rhodamine B removal is 2.3 times or 2.9 times greater than that of a single SnS2 or BiVO4, respectively. The chemical bond between photocatalysts is confirmed by X-ray photoelectron spectroscopy (XPS), and the synchronized shift observed in binding energies strongly indicates the electron screening effect at the heterojunction. A Z-scheme model is proposed to explain charge transfer pathway in the system, in which the formation of Bi2S3 plays a crucial role in the enhanced photocatalytic performance of the heterojunction.
Rights: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
URI: http://hdl.handle.net/2433/259222
DOI(Published Version): 10.3390/catal10111294
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