Staff View: Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV

Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light

MXene-based materials are favorable as cocatalyst for photocatalytic reduction of CO2 owing to their distinctive two-dimensional (2D) layered structure, large surface area, electrical conductivity and incredible chemical stability. Well-designed anatase TiO2 anchored Ti3C2/TiO2R composite was synthe...

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Main Authors:	Ali Khan, Azmat, Muhammad Tahir, Muhammad Tahir, Zakaria, Zaki Yamani
Format:	Article
Published:	Elsevier Ltd 2021
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/94697/ http://dx.doi.org/10.1016/j.jece.2021.105244
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spelling	my.utm.946972022-03-31T15:52:20Z http://eprints.utm.my/id/eprint/94697/ Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light Ali Khan, Azmat Muhammad Tahir, Muhammad Tahir Zakaria, Zaki Yamani TP Chemical technology MXene-based materials are favorable as cocatalyst for photocatalytic reduction of CO2 owing to their distinctive two-dimensional (2D) layered structure, large surface area, electrical conductivity and incredible chemical stability. Well-designed anatase TiO2 anchored Ti3C2/TiO2R composite was synthesized through ultrasonic approach, whereas controlled etching method was employed for in-situ growth of rutile TiO2 NPs. The TiO2 (rutile) nanoparticles were distributed onto the Ti3C2 MXene nanosheets, whereas, the increase in etching time from 24 to 96 h caused increased in the quantity of TiO2 embedded over Ti3C2 surface to produce Ti3C2/TiO2R. The resulting TiO2A/Ti3C2/TiO2R MXene composite was tested through different reforming systems which include CO2 reduction with H2O, dry reforming of methane (DRM) and bi-reforming of methane (BRM). Using CO2-water, the composite exhibited 85 and 18 µmol g-1 h-1 for CO and CH4 evolution, respectively, when photo-reduced with H2O. Using DRM process, CO and H2 were the main products with yield 47.8 and 13.8 µmol g-1 h-1, respectively. Using BRM, performance of composite was increased by 9.53 folds higher than using DRM process. The BRM process showed high efficiency and selectivity for hydrogen rich syngas production due to efficient oxidation process in the presence of water with yield 38.25 and 52.5 µmol g-1 h-1, respectively. These findings imply that TiO2A/ Ti3C2/TiO2R nanocomposite has the capability as a cocatalyst for high-performance photocatalytic material. Moreover, TiO2A coupled with Ti3C2/TiO2R showed excellent cycling stability without deactivation after three cycles and can be a potential structured material for other energy applications. Elsevier Ltd 2021 Article PeerReviewed Ali Khan, Azmat and Muhammad Tahir, Muhammad Tahir and Zakaria, Zaki Yamani (2021) Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light. Journal of Environmental Chemical Engineering, 9 (3). p. 105244. ISSN 2213-3437 http://dx.doi.org/10.1016/j.jece.2021.105244
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TP Chemical technology
spellingShingle	TP Chemical technology Ali Khan, Azmat Muhammad Tahir, Muhammad Tahir Zakaria, Zaki Yamani Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light
description	MXene-based materials are favorable as cocatalyst for photocatalytic reduction of CO2 owing to their distinctive two-dimensional (2D) layered structure, large surface area, electrical conductivity and incredible chemical stability. Well-designed anatase TiO2 anchored Ti3C2/TiO2R composite was synthesized through ultrasonic approach, whereas controlled etching method was employed for in-situ growth of rutile TiO2 NPs. The TiO2 (rutile) nanoparticles were distributed onto the Ti3C2 MXene nanosheets, whereas, the increase in etching time from 24 to 96 h caused increased in the quantity of TiO2 embedded over Ti3C2 surface to produce Ti3C2/TiO2R. The resulting TiO2A/Ti3C2/TiO2R MXene composite was tested through different reforming systems which include CO2 reduction with H2O, dry reforming of methane (DRM) and bi-reforming of methane (BRM). Using CO2-water, the composite exhibited 85 and 18 µmol g-1 h-1 for CO and CH4 evolution, respectively, when photo-reduced with H2O. Using DRM process, CO and H2 were the main products with yield 47.8 and 13.8 µmol g-1 h-1, respectively. Using BRM, performance of composite was increased by 9.53 folds higher than using DRM process. The BRM process showed high efficiency and selectivity for hydrogen rich syngas production due to efficient oxidation process in the presence of water with yield 38.25 and 52.5 µmol g-1 h-1, respectively. These findings imply that TiO2A/ Ti3C2/TiO2R nanocomposite has the capability as a cocatalyst for high-performance photocatalytic material. Moreover, TiO2A coupled with Ti3C2/TiO2R showed excellent cycling stability without deactivation after three cycles and can be a potential structured material for other energy applications.
format	Article
author	Ali Khan, Azmat Muhammad Tahir, Muhammad Tahir Zakaria, Zaki Yamani
author_facet	Ali Khan, Azmat Muhammad Tahir, Muhammad Tahir Zakaria, Zaki Yamani
author_sort	Ali Khan, Azmat
title	Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light
title_short	Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light
title_full	Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light
title_fullStr	Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light
title_full_unstemmed	Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light
title_sort	synergistic effect of anatase/rutile tio2 with exfoliated ti3c2tr mxene multilayers composite for enhanced co2 photoreduction via dry and bi-reforming of methane under uv–visible light
publisher	Elsevier Ltd
publishDate	2021
url	http://eprints.utm.my/id/eprint/94697/ http://dx.doi.org/10.1016/j.jece.2021.105244
_version_	1729703208782135296
score	13.211869

Synergistic effect of anatase/rutile TiO2 with exfoliated Ti3C2TR MXene multilayers composite for enhanced CO2 photoreduction via dry and bi-reforming of methane under UV–visible light

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