Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes

Abstract The creation of composite structures is a commonly employed approach towards enhanced photocatalytic performance, with one of the key rationales for doing this being to separate photoexcited charges, affording them longer lifetimes in which to react with adsorbed species. Here we examine th...

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Autores principales:	Kanlaya Pingmuang, Jun Chen, Wiyong Kangwansupamonkon, Gordon G. Wallace, Sukon Phanichphant, Andrew Nattestad
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e6beac16563c4635a1a28076acfe5f3e
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spelling	oai:doaj.org-article:e6beac16563c4635a1a28076acfe5f3e2021-12-02T16:06:28ZComposite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes10.1038/s41598-017-09514-52045-2322https://doaj.org/article/e6beac16563c4635a1a28076acfe5f3e2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09514-5https://doaj.org/toc/2045-2322Abstract The creation of composite structures is a commonly employed approach towards enhanced photocatalytic performance, with one of the key rationales for doing this being to separate photoexcited charges, affording them longer lifetimes in which to react with adsorbed species. Here we examine three composite photocatalysts using either WO3, TiO2 or CeO2 with BiVO4 for the degradation of model dyes Methylene Blue and Rhodamine B. Each of these materials (WO3, TiO2 or CeO2) has a different band edge energy offset with respect to BiVO4, allowing for a systematic comparison of these different arrangements. It is seen that while these offsets can afford beneficial charge transfer (CT) processes, they can also result in the deactivation of certain reactions. We also observed the importance of localized dye concentrations, resulting from a strong affinity between it and the surface, in attaining high overall photocatalytic performance, a factor not often acknowledged. It is hoped in the future that these observations will assist in the judicious selection of semiconductors for use as composite photocatalysts.Kanlaya PingmuangJun ChenWiyong KangwansupamonkonGordon G. WallaceSukon PhanichphantAndrew NattestadNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kanlaya Pingmuang Jun Chen Wiyong Kangwansupamonkon Gordon G. Wallace Sukon Phanichphant Andrew Nattestad Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes
description	Abstract The creation of composite structures is a commonly employed approach towards enhanced photocatalytic performance, with one of the key rationales for doing this being to separate photoexcited charges, affording them longer lifetimes in which to react with adsorbed species. Here we examine three composite photocatalysts using either WO3, TiO2 or CeO2 with BiVO4 for the degradation of model dyes Methylene Blue and Rhodamine B. Each of these materials (WO3, TiO2 or CeO2) has a different band edge energy offset with respect to BiVO4, allowing for a systematic comparison of these different arrangements. It is seen that while these offsets can afford beneficial charge transfer (CT) processes, they can also result in the deactivation of certain reactions. We also observed the importance of localized dye concentrations, resulting from a strong affinity between it and the surface, in attaining high overall photocatalytic performance, a factor not often acknowledged. It is hoped in the future that these observations will assist in the judicious selection of semiconductors for use as composite photocatalysts.
format	article
author	Kanlaya Pingmuang Jun Chen Wiyong Kangwansupamonkon Gordon G. Wallace Sukon Phanichphant Andrew Nattestad
author_facet	Kanlaya Pingmuang Jun Chen Wiyong Kangwansupamonkon Gordon G. Wallace Sukon Phanichphant Andrew Nattestad
author_sort	Kanlaya Pingmuang
title	Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes
title_short	Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes
title_full	Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes
title_fullStr	Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes
title_full_unstemmed	Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes
title_sort	composite photocatalysts containing bivo4 for degradation of cationic dyes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e6beac16563c4635a1a28076acfe5f3e
work_keys_str_mv	AT kanlayapingmuang compositephotocatalystscontainingbivo4fordegradationofcationicdyes AT junchen compositephotocatalystscontainingbivo4fordegradationofcationicdyes AT wiyongkangwansupamonkon compositephotocatalystscontainingbivo4fordegradationofcationicdyes AT gordongwallace compositephotocatalystscontainingbivo4fordegradationofcationicdyes AT sukonphanichphant compositephotocatalystscontainingbivo4fordegradationofcationicdyes AT andrewnattestad compositephotocatalystscontainingbivo4fordegradationofcationicdyes
_version_	1718384997600067584

Composite Photocatalysts Containing BiVO4 for Degradation of Cationic Dyes

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