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Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol

In situ construction of two-dimensional (2D)/2D pg-C3N4/Ti3AlC2 MAX heterojunction was achieved using a protonated assisted sonication approach, while TiO2 nanoparticles were embedded over the layered heterostructure using a sol–gel method. This multiheterojunction system exhibits proficient charge...

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Main Author: Muhammad Tahir, Muhammad Tahir
Format: Article
Published: American Chemical Society 2020
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/87556/
http://www.dx.doi.org/10.1021/acs.energyfuels.9b04393
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spelling my.utm.875562020-11-30T09:03:44Z http://eprints.utm.my/id/eprint/87556/ Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol Muhammad Tahir, Muhammad Tahir TP Chemical technology In situ construction of two-dimensional (2D)/2D pg-C3N4/Ti3AlC2 MAX heterojunction was achieved using a protonated assisted sonication approach, while TiO2 nanoparticles were embedded over the layered heterostructure using a sol–gel method. This multiheterojunction system exhibits proficient charge transfer and superior activity toward photocatalytic reduction of CO2 through dry reforming of methanol (DRM). Using pg-C3N4/Ti3AlC2/TiO2 composite, H2 and CO production rates at 91.9 and 4.97 mmol (g of cat.)−1 h–1 were achieved, which are 18- and 6-fold higher than using pristine pg-C3N4, respectively. The enhancement in photocatalytic activity is mainly attributed to intimate interfacial contact due to the formation of a multiheterojunction for better light absorption, boosted electron separation, and stronger photoreductive potential. More importantly, CO2 reduction with H2O produces CO-rich syngas; however, the methanol/water mixture promoted hydrogen-rich syngas production. Higher quantum yield and prolonged stability are further achieved over the composite catalyst, attributed to the exfoliated 2D Ti3AlC2 MAX structure with strong metal/support interaction. This work demonstrates DRM as a potential approach to get hydrogen-rich syngas and provides a new pathway for the construction of highly stable 2D MAX based structured composite for water splitting and CO2 reforming applications. American Chemical Society 2020 Article PeerReviewed Muhammad Tahir, Muhammad Tahir (2020) Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol. Energy Fuels, 34 (3). pp. 3540-3556. http://www.dx.doi.org/10.1021/acs.energyfuels.9b04393 DOI: 10.1021/acs.energyfuels.9b04393
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
Muhammad Tahir, Muhammad Tahir
Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
description In situ construction of two-dimensional (2D)/2D pg-C3N4/Ti3AlC2 MAX heterojunction was achieved using a protonated assisted sonication approach, while TiO2 nanoparticles were embedded over the layered heterostructure using a sol–gel method. This multiheterojunction system exhibits proficient charge transfer and superior activity toward photocatalytic reduction of CO2 through dry reforming of methanol (DRM). Using pg-C3N4/Ti3AlC2/TiO2 composite, H2 and CO production rates at 91.9 and 4.97 mmol (g of cat.)−1 h–1 were achieved, which are 18- and 6-fold higher than using pristine pg-C3N4, respectively. The enhancement in photocatalytic activity is mainly attributed to intimate interfacial contact due to the formation of a multiheterojunction for better light absorption, boosted electron separation, and stronger photoreductive potential. More importantly, CO2 reduction with H2O produces CO-rich syngas; however, the methanol/water mixture promoted hydrogen-rich syngas production. Higher quantum yield and prolonged stability are further achieved over the composite catalyst, attributed to the exfoliated 2D Ti3AlC2 MAX structure with strong metal/support interaction. This work demonstrates DRM as a potential approach to get hydrogen-rich syngas and provides a new pathway for the construction of highly stable 2D MAX based structured composite for water splitting and CO2 reforming applications.
format Article
author Muhammad Tahir, Muhammad Tahir
author_facet Muhammad Tahir, Muhammad Tahir
author_sort Muhammad Tahir, Muhammad Tahir
title Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
title_short Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
title_full Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
title_fullStr Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
title_full_unstemmed Construction of a stable two-dimensional MAX supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
title_sort construction of a stable two-dimensional max supported protonated graphitic carbon nitride (pg-c3n4)/ti3alc2/tio2 z-scheme multiheterojunction system for efficient photocatalytic co2 reduction through dry reforming of methanol
publisher American Chemical Society
publishDate 2020
url http://eprints.utm.my/id/eprint/87556/
http://www.dx.doi.org/10.1021/acs.energyfuels.9b04393
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score 13.211869

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