Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance
Fabrication of Z-scheme heterojunction photocatalysts is an ideal strategy for solving environmental problems by providing inexhaustible solar energy. A direct Z-scheme anatase TiO<sub>2</sub>/rutile TiO<sub>2</sub> heterojunction photocatalyst was prepared using a facile B-d...
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MDPI AG
2023-02-01
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author | Changqing Liu Chenggang Xu Wanting Wang Long Chen Xu Li Yuanting Wu |
author_facet | Changqing Liu Chenggang Xu Wanting Wang Long Chen Xu Li Yuanting Wu |
author_sort | Changqing Liu |
collection | DOAJ |
description | Fabrication of Z-scheme heterojunction photocatalysts is an ideal strategy for solving environmental problems by providing inexhaustible solar energy. A direct Z-scheme anatase TiO<sub>2</sub>/rutile TiO<sub>2</sub> 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-TiO<sub>2</sub> and rutile-TiO<sub>2</sub>, 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-TiO<sub>2</sub> to A-TiO<sub>2</sub> 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. |
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spelling | doaj.art-c982b2ab5a204498ae47589d71a78ab62023-11-17T08:16:33ZengMDPI AGNanomaterials2079-49912023-02-0113579410.3390/nano13050794Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic PerformanceChangqing Liu0Chenggang Xu1Wanting Wang2Long Chen3Xu Li4Yuanting Wu5School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaFabrication of Z-scheme heterojunction photocatalysts is an ideal strategy for solving environmental problems by providing inexhaustible solar energy. A direct Z-scheme anatase TiO<sub>2</sub>/rutile TiO<sub>2</sub> 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-TiO<sub>2</sub> and rutile-TiO<sub>2</sub>, 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-TiO<sub>2</sub> to A-TiO<sub>2</sub> 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.https://www.mdpi.com/2079-4991/13/5/794Z-scheme heterojunctionanatase TiO<sub>2</sub>/rutile TiO<sub>2</sub>band structureoxygen vacancy |
spellingShingle | Changqing Liu Chenggang Xu Wanting Wang Long Chen Xu Li Yuanting Wu Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance Nanomaterials Z-scheme heterojunction anatase TiO<sub>2</sub>/rutile TiO<sub>2</sub> band structure oxygen vacancy |
title | Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance |
title_full | Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance |
title_fullStr | Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance |
title_full_unstemmed | Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance |
title_short | Oxygen Vacancy Mediated Band-Gap Engineering via B-Doping for Enhancing Z-Scheme A-TiO<sub>2</sub>/R-TiO<sub>2</sub> Heterojunction Photocatalytic Performance |
title_sort | oxygen vacancy mediated band gap engineering via b doping for enhancing z scheme a tio sub 2 sub r tio sub 2 sub heterojunction photocatalytic performance |
topic | Z-scheme heterojunction anatase TiO<sub>2</sub>/rutile TiO<sub>2</sub> band structure oxygen vacancy |
url | https://www.mdpi.com/2079-4991/13/5/794 |
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