Journal
ELECTROCHIMICA ACTA
Volume 298, Issue -, Pages 663-669Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.12.130
Keywords
Molybdenum diselenide; TiO2 nanotube arrays; Z-scheme; Photocatalysis
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Funding
- National Natural Science Foundation of China [51478214, 51720105001, 51868051]
- Key Project of Research and Development Plan of Jiangxi Province [2016ACG70001]
- Distinguished Young Scholars Program by Jiangxi Province [20162BCB23042]
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Exploring a Z-scheme heterojunction photocatalyst with efficient charge separation and outstanding redox ability is necessary but very challenging. Herein, a novel direct Z-scheme MoSe2 decorating TiO2 nanotube arrays photocatalyst (denoted as MoSe2@TNTs) was prepared by a facile in situ hydrothermal method. Few-layer MoSe2 nanosheets distribute on the surface of the TNTs without shielding the tubular structure. Compared with individual TNTs and MoSe2, the as-prepared MoSe2@TNTs composite displays much better photocatalytic activity for eliminating pollutants (such as 4-nitrophenol and hexavalent chromium). Investigation results reveal that TNTs combined with appropriate amount of MoSe2 as co-catalyst has direct Z-scheme construction instead of traditional type-II heterojunction, which can offer abundant photo-generated active species with high redox capacity. (C) 2018 Elsevier Ltd. All rights reserved.
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