Construction of Z-scheme Bi2O3/CeO2 heterojunction for enhanced photocatalytic capacity of TiO2 NTs

[Display omitted] •Bi2O3-CeO2 cosensitized TiO2 NTs were synthesized.•TiO2 NTs/Bi2O3-CeO2 showed the photocatalytic H2 generation rate of 499.43 μmol·cm−2·h−1.•TiO2 NTs/Bi2O3-CeO2 showed excellent photocatalytic performances toward RhB/MB degradation and Cr(VI) removal.•The high photocatalytic perfo...

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Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2024-01, Vol.304, p.123405, Article 123405
Main Authors: Wang, Qingyao, Zhao, Shengzhan, Zhao, Yuhua, Deng, Yadan, Yang, Wen, Ye, Yizhuang, Wang, Kesheng
Format: Article
Language:English
Subjects:
Bi2O3
CeO2
Photocatalytic performance
TiO2 NTs
Z-scheme heterojunction
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Summary:[Display omitted] •Bi2O3-CeO2 cosensitized TiO2 NTs were synthesized.•TiO2 NTs/Bi2O3-CeO2 showed the photocatalytic H2 generation rate of 499.43 μmol·cm−2·h−1.•TiO2 NTs/Bi2O3-CeO2 showed excellent photocatalytic performances toward RhB/MB degradation and Cr(VI) removal.•The high photocatalytic performance is ascribed to the construction of Z-scheme heterojunction. Photocatalytic technology was recognized to be the effective strategy to overcome the obstacles of environment pollution and energy shortage, and the novel photocatalyst design/construction was the key point for photocatalytic performance improvement. In this paper, the Z-scheme Bi2O3 and CeO2 heterojunction was constructed on TiO2 nanotube arrays (TiO2 NTs) by the hydrothermal deposition method. The Bi2O3-CeO2 cosensitization not only extended the solar absorption region but also accelerated the photoelectron separation and transfer, finally enhanced the photocatalytic property. The photocatalysts exhibited the high RhB/MB photodegradation and Cr(VI) reduction, and the photoelectric conversion and photocatalytic H2 evolution were also preeminent. The Z-scheme heterojunction construction was recognized to be the reason for the high photoactivity, and O2– and OH radicals were formed and investigated as the main active species for the dye photodegradation. The work gives the simple method and idea to construct novel ternary Z-scheme heterojunctions with high photocatalytic capacity for environment remediation and new energy development.
ISSN:1386-1425
DOI:10.1016/j.saa.2023.123405