Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2

Exfoliated vanadium aluminum carbide (V2AlC) MAX nanosheets coupled with porous graphitic carbon nitride to construct 2D/2D V2AlC MAX/g-C3N4 heterojunction for photocatalytic CO2 reduction through dry reforming of methane has been investigated. Good interfacial interaction was achieved which enabled...

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Main Authors: Madi, Mohamed, Tahir, Muhammad
Format: Article
Published: John Wiley and Sons Ltd 2022
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Online Access:http://eprints.utm.my/id/eprint/101080/
http://dx.doi.org/10.1002/er.7667
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spelling my.utm.1010802023-05-27T07:42:05Z http://eprints.utm.my/id/eprint/101080/ Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2 Madi, Mohamed Tahir, Muhammad TP Chemical technology Exfoliated vanadium aluminum carbide (V2AlC) MAX nanosheets coupled with porous graphitic carbon nitride to construct 2D/2D V2AlC MAX/g-C3N4 heterojunction for photocatalytic CO2 reduction through dry reforming of methane has been investigated. Good interfacial interaction was achieved which enabled proficient charge carrier separation with promoted light absorption. The optimized 10 wt%V2AlC MAX/g-C3N4 was more proficient with CO and H2 evolution rates of 118.74 and 89.52 μmole g−1 h-1 at selectivity 57.01 and 42.98%, respectively. This efficiency for CO and H2 evolution rate was 2.21- and 1.99-folds superior to using pure g-C3N4. This improvement is due to good interfacial contact and efficient charge carrier separation by MAX, which increases photo-induced charge carrier lifetime. The performance was further investigated with different reforming systems to manipulate the effective utilization of holes to extend charges recombination rate. Using CO2 reduction with hydrogen, CO2 methanation and the reverse water-gas shift reaction were activated, whereas CO2 with water promoted more methane formation. By investigating CH4/CO2 feed ratios, the highest yield rates attained with the ratio of 1:0, confirming V2AlC based-composite effectively activates both gases as evidenced by their apparent quantum yields. This study provides a promising route for the fabrication of noble-metal-free nanocomposite and will be useful for future energy and environmental applications. John Wiley and Sons Ltd 2022 Article PeerReviewed Madi, Mohamed and Tahir, Muhammad (2022) Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2. International Journal of Energy Research, 46 (6). pp. 7666-7685. ISSN 0363-907X http://dx.doi.org/10.1002/er.7667 DOI: 10.1002/er.7667
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
Madi, Mohamed
Tahir, Muhammad
Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2
description Exfoliated vanadium aluminum carbide (V2AlC) MAX nanosheets coupled with porous graphitic carbon nitride to construct 2D/2D V2AlC MAX/g-C3N4 heterojunction for photocatalytic CO2 reduction through dry reforming of methane has been investigated. Good interfacial interaction was achieved which enabled proficient charge carrier separation with promoted light absorption. The optimized 10 wt%V2AlC MAX/g-C3N4 was more proficient with CO and H2 evolution rates of 118.74 and 89.52 μmole g−1 h-1 at selectivity 57.01 and 42.98%, respectively. This efficiency for CO and H2 evolution rate was 2.21- and 1.99-folds superior to using pure g-C3N4. This improvement is due to good interfacial contact and efficient charge carrier separation by MAX, which increases photo-induced charge carrier lifetime. The performance was further investigated with different reforming systems to manipulate the effective utilization of holes to extend charges recombination rate. Using CO2 reduction with hydrogen, CO2 methanation and the reverse water-gas shift reaction were activated, whereas CO2 with water promoted more methane formation. By investigating CH4/CO2 feed ratios, the highest yield rates attained with the ratio of 1:0, confirming V2AlC based-composite effectively activates both gases as evidenced by their apparent quantum yields. This study provides a promising route for the fabrication of noble-metal-free nanocomposite and will be useful for future energy and environmental applications.
format Article
author Madi, Mohamed
Tahir, Muhammad
author_facet Madi, Mohamed
Tahir, Muhammad
author_sort Madi, Mohamed
title Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2
title_short Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2
title_full Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2
title_fullStr Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2
title_full_unstemmed Fabricating V2AlC/g-C3N4 nanocomposite with MAX as electron moderator for promoting photocatalytic CO2-CH4 reforming to CO/H2
title_sort fabricating v2alc/g-c3n4 nanocomposite with max as electron moderator for promoting photocatalytic co2-ch4 reforming to co/h2
publisher John Wiley and Sons Ltd
publishDate 2022
url http://eprints.utm.my/id/eprint/101080/
http://dx.doi.org/10.1002/er.7667
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