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Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light

In this study, composite materials based on nanocrystalline anatase TiO(2) doped with nitrogen and bismuth tungstate are synthesized using a hydrothermal method. All samples are tested in the oxidation of volatile organic compounds under visible light to find the correlations between their physicoch...

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Detalles Bibliográficos
Autores principales: Lyulyukin, Mikhail, Kovalevskiy, Nikita, Bukhtiyarov, Andrey, Kozlov, Denis, Selishchev, Dmitry
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10051460/
https://www.ncbi.nlm.nih.gov/pubmed/36982767
http://dx.doi.org/10.3390/ijms24065693
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author Lyulyukin, Mikhail
Kovalevskiy, Nikita
Bukhtiyarov, Andrey
Kozlov, Denis
Selishchev, Dmitry
author_facet Lyulyukin, Mikhail
Kovalevskiy, Nikita
Bukhtiyarov, Andrey
Kozlov, Denis
Selishchev, Dmitry
author_sort Lyulyukin, Mikhail
collection PubMed
description In this study, composite materials based on nanocrystalline anatase TiO(2) doped with nitrogen and bismuth tungstate are synthesized using a hydrothermal method. All samples are tested in the oxidation of volatile organic compounds under visible light to find the correlations between their physicochemical characteristics and photocatalytic activity. The kinetic aspects are studied both in batch and continuous-flow reactors, using ethanol and benzene as test compounds. The Bi(2)WO(6)/TiO(2)-N heterostructure enhanced with Fe species efficiently utilizes visible light in the blue region and exhibits much higher activity in the degradation of ethanol vapor than pristine TiO(2)-N. However, an increased activity of Fe/Bi(2)WO(6)/TiO(2)-N can have an adverse effect in the degradation of benzene vapor. A temporary deactivation of the photocatalyst can occur at a high concentration of benzene due to the fast accumulation of non-volatile intermediates on its surface. The formed intermediates suppress the adsorption of the initial benzene and substantially increase the time required for its complete removal from the gas phase. An increase in temperature up to 140 °C makes it possible to increase the rate of the overall oxidation process, and the use of the Fe/Bi(2)WO(6)/TiO(2)-N composite improves the selectivity of oxidation compared to pristine TiO(2)-N.
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spelling pubmed-100514602023-03-30 Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light Lyulyukin, Mikhail Kovalevskiy, Nikita Bukhtiyarov, Andrey Kozlov, Denis Selishchev, Dmitry Int J Mol Sci Article In this study, composite materials based on nanocrystalline anatase TiO(2) doped with nitrogen and bismuth tungstate are synthesized using a hydrothermal method. All samples are tested in the oxidation of volatile organic compounds under visible light to find the correlations between their physicochemical characteristics and photocatalytic activity. The kinetic aspects are studied both in batch and continuous-flow reactors, using ethanol and benzene as test compounds. The Bi(2)WO(6)/TiO(2)-N heterostructure enhanced with Fe species efficiently utilizes visible light in the blue region and exhibits much higher activity in the degradation of ethanol vapor than pristine TiO(2)-N. However, an increased activity of Fe/Bi(2)WO(6)/TiO(2)-N can have an adverse effect in the degradation of benzene vapor. A temporary deactivation of the photocatalyst can occur at a high concentration of benzene due to the fast accumulation of non-volatile intermediates on its surface. The formed intermediates suppress the adsorption of the initial benzene and substantially increase the time required for its complete removal from the gas phase. An increase in temperature up to 140 °C makes it possible to increase the rate of the overall oxidation process, and the use of the Fe/Bi(2)WO(6)/TiO(2)-N composite improves the selectivity of oxidation compared to pristine TiO(2)-N. MDPI 2023-03-16 /pmc/articles/PMC10051460/ /pubmed/36982767 http://dx.doi.org/10.3390/ijms24065693 Text en © 2023 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
Lyulyukin, Mikhail
Kovalevskiy, Nikita
Bukhtiyarov, Andrey
Kozlov, Denis
Selishchev, Dmitry
Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light
title Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light
title_full Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light
title_fullStr Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light
title_full_unstemmed Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light
title_short Kinetic Aspects of Benzene Degradation over TiO(2)-N and Composite Fe/Bi(2)WO(6)/TiO(2)-N Photocatalysts under Irradiation with Visible Light
title_sort kinetic aspects of benzene degradation over tio(2)-n and composite fe/bi(2)wo(6)/tio(2)-n photocatalysts under irradiation with visible light
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10051460/
https://www.ncbi.nlm.nih.gov/pubmed/36982767
http://dx.doi.org/10.3390/ijms24065693
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