Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO₂/R-TiO₂ Heterojunction Photocatalytic Performance.

Content Provider	Europe PMC
Author	Liu, Changqing Xu, Chenggang Wang, Wanting Chen, Long Li, Xu Wu, Yuanting
Editor	Karazhanov, Smagul Andronic, Luminiţa
Copyright Year	2023
Abstract	Fabrication of Z-scheme heterojunction photocatalysts is an ideal strategy for solving environmental problems by providing inexhaustible solar energy. A direct Z-scheme anatase TiO2/rutile TiO2 heterojunction photocatalyst was prepared using a facile B-doping strategy. The band structure and oxygen-vacancy content can be successfully tailored by controlling the amount of B-dopant. The photocatalytic performance was enhanced via the Z-scheme transfer path formed between the B doped anatase-TiO2 and rutile-TiO2, optimized band structure with markedly positively shifted band potentials, and the synergistically-mediated oxygen vacancy contents. Moreover, the optimization study indicated that 10% B-doping with the R-TiO2 to A-TiO2 weight ratio of 0.04 could achieve the highest photocatalytic performance. This work may provide an effective approach to synthesize nonmetal-doped semiconductor photocatalysts with tunable-energy structures and promote the efficiency of charge separation.
Journal	Nanomaterials (Basel, Switzerland)
Volume Number	13
PubMed Central reference number	PMC10005070
Issue Number	5
PubMed reference number	36903674
e-ISSN	20794991
DOI	10.3390/nano13050794
Language	English
Publisher	MDPI
Publisher Date	2023-02-21
Access Restriction	Open
Rights License	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 (https://creativecommons.org/licenses/by/4.0/). © 2023 by the authors.
Subject Keyword	Z-scheme heterojunction anatase TiO2/rutile TiO2 band structure oxygen vacancy
Content Type	Text
Resource Type	Article
Subject	Chemical Engineering Materials Science