期刊
ADVANCED POWDER TECHNOLOGY
卷 32, 期 12, 页码 4734-4743出版社
ELSEVIER
DOI: 10.1016/j.apt.2021.10.022
关键词
TiO2 nanorods; Bi2WO6; Z-scheme; Photocatalyst; H-2 production
资金
- Ministry of New and Renewable Energy (MNRE) , New Delhi, India [103/239/2015]
- CSIR-India [09/1045 (0035) 2K19 EMR-I]
In this study, a Bi2WO6/TiO2 nanorod heterojunction was prepared, achieving a high photocatalytic hydrogen production rate. The excellent performance was attributed to mechanisms such as reduction of bandgap, quick transport of charge carriers, and efficient charge carrier separation. The Z-scheme band alignment proposed for the heterojunction demonstrated effective utilization for photocatalytic reduction applications.
In this work, Bi2WO6/TiO2 nanorod heterojunction was prepared by sonochemical assisted impregnation method. After loading 2 wt% Bi2WO6 on TiO2 nanorods, the photocatalytic hydrogen production rate of 2026 mmol/h/g was achieved. Compared to commercial P25 and TiO2 nanorods, similar to 13 and similar to 3 folds enhanced activity was observed. The excellent photocatalytic performance of Bi2WO6/TiO2 nanorod pho-tocatalyst was mainly attributed to i) reduction of bandgap due to heterojunction formation, ii) quick transport of photogenerated charge carriers, and iii) efficient charge carrier separation supported by UV-DRS, photocurrent measurement, Impedance study, and photoluminescence spectra analysis. The Z-scheme band alignment for Bi2WO6/TiO2 nanorod heterojunction was proposed based on the Mott-Schottky measurement. This result demonstrated the effective utilization of Z-scheme heterojunction of Bi2WO6/TiO2 for photocatalytic reduction application. (C) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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