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Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO

Herein, step-scheme (S-scheme) CuBi(2)O(4)/CuO (CBO/CuO) composite films were successfully synthesized on glass substrates by the ultra-fast spraying-calcination method. The photocatalytic activities of the obtained materials for CO(2) reduction in the presence of H(2)O vapor were evaluated under vi...

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Autores principales: Shi, Weina, Qiao, Xiu, Wang, Jichao, Zhao, Miao, Ge, Hongling, Ma, Jingjing, Liu, Shanqin, Zhang, Wanqing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504175/
https://www.ncbi.nlm.nih.gov/pubmed/36145034
http://dx.doi.org/10.3390/nano12183247
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author Shi, Weina
Qiao, Xiu
Wang, Jichao
Zhao, Miao
Ge, Hongling
Ma, Jingjing
Liu, Shanqin
Zhang, Wanqing
author_facet Shi, Weina
Qiao, Xiu
Wang, Jichao
Zhao, Miao
Ge, Hongling
Ma, Jingjing
Liu, Shanqin
Zhang, Wanqing
author_sort Shi, Weina
collection PubMed
description Herein, step-scheme (S-scheme) CuBi(2)O(4)/CuO (CBO/CuO) composite films were successfully synthesized on glass substrates by the ultra-fast spraying-calcination method. The photocatalytic activities of the obtained materials for CO(2) reduction in the presence of H(2)O vapor were evaluated under visible light irradiation (λ > 400 nm). Benefiting from the construction of S-scheme heterojunction, the CO, CH(4) and O(2) yields of the optimal CBO/CuO composite reached 1599.1, 5.1 and 682.2 μmol/m(2) after irradiation for 9 h, and the selectivity of the CO product was notably enhanced from below 18.5% to above 98.5% compared with those of the bare samples. In the sixth cycling experiment, the yields of main products decreased by less than 15%, and a high CO selectivity was still kept. The enhanced photocatalytic performance of CO(2) reduction was attributed to the efficient separation of photogenerated charge carriers. Based on the photocatalytic activity, band structure and in situ-XPS results, the S-scheme charge transfer mechanism was conformed. The study provides an insight into the design of S-scheme photocatalysts for selective CO(2) conversion.
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spelling pubmed-95041752022-09-24 Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO Shi, Weina Qiao, Xiu Wang, Jichao Zhao, Miao Ge, Hongling Ma, Jingjing Liu, Shanqin Zhang, Wanqing Nanomaterials (Basel) Article Herein, step-scheme (S-scheme) CuBi(2)O(4)/CuO (CBO/CuO) composite films were successfully synthesized on glass substrates by the ultra-fast spraying-calcination method. The photocatalytic activities of the obtained materials for CO(2) reduction in the presence of H(2)O vapor were evaluated under visible light irradiation (λ > 400 nm). Benefiting from the construction of S-scheme heterojunction, the CO, CH(4) and O(2) yields of the optimal CBO/CuO composite reached 1599.1, 5.1 and 682.2 μmol/m(2) after irradiation for 9 h, and the selectivity of the CO product was notably enhanced from below 18.5% to above 98.5% compared with those of the bare samples. In the sixth cycling experiment, the yields of main products decreased by less than 15%, and a high CO selectivity was still kept. The enhanced photocatalytic performance of CO(2) reduction was attributed to the efficient separation of photogenerated charge carriers. Based on the photocatalytic activity, band structure and in situ-XPS results, the S-scheme charge transfer mechanism was conformed. The study provides an insight into the design of S-scheme photocatalysts for selective CO(2) conversion. MDPI 2022-09-19 /pmc/articles/PMC9504175/ /pubmed/36145034 http://dx.doi.org/10.3390/nano12183247 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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/).
spellingShingle Article
Shi, Weina
Qiao, Xiu
Wang, Jichao
Zhao, Miao
Ge, Hongling
Ma, Jingjing
Liu, Shanqin
Zhang, Wanqing
Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO
title Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO
title_full Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO
title_fullStr Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO
title_full_unstemmed Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO
title_short Ultra-Fast Construction of Novel S-Scheme CuBi(2)O(4)/CuO Heterojunction for Selectively Photocatalytic CO(2) Conversion to CO
title_sort ultra-fast construction of novel s-scheme cubi(2)o(4)/cuo heterojunction for selectively photocatalytic co(2) conversion to co
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504175/
https://www.ncbi.nlm.nih.gov/pubmed/36145034
http://dx.doi.org/10.3390/nano12183247
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