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Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production

Well-designed, two-dimensional hierarchical g-C3N4 (2D HCN) nanosheets anchored over two-dimensional exfoliated titanium carbide (2D TiC) multilayers embedded with in situ grown TiO2 were fabricated for stimulating H2 production under visible light. The Ti3C2 efficiency was directly influenced by va...

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Main Author: Muhammad Tahir, Muhammad Tahir
Format: Article
Published: American Chemical Society 2021
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/95111/
http://dx.doi.org/10.1021/acs.energyfuels.1c00204
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spelling my.utm.951112022-04-29T22:24:09Z http://eprints.utm.my/id/eprint/95111/ Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production Muhammad Tahir, Muhammad Tahir TP Chemical technology Well-designed, two-dimensional hierarchical g-C3N4 (2D HCN) nanosheets anchored over two-dimensional exfoliated titanium carbide (2D TiC) multilayers embedded with in situ grown TiO2 were fabricated for stimulating H2 production under visible light. The Ti3C2 efficiency was directly influenced by varying the etching time ranging from 24 to 96 h. Using optimized 2D TiC multilayers embedded with TiO2 (anatase) with etchant time 48 h, the highest H2 yield of 182.5 µmol g-1 h-1 was attained, an obviously higher production rate than using etchant times of 24, 72, and 96 h, due to improved charge carrier separation efficiency through heterojunction formation. Hierarchical g-C3N4 exhibited 1.26 times more H2 yield than using bulk g-C3N4 due to efficient migration and transportation of charge carrier. The H2 production rate of the optimized 10TiC-48/HCN 2D/2D heterojunction reached 310 µmol g-1 h-1 which is ~1.93, 2.33, and 2.95 times higher than it was produced over TiC-48, HCN, and CN, respectively. This proficient hydrogen production was due to faster transfer of electrons from HCN to TiC-MXene due to higher conductivity and formation of heterojunction between HCN and TiO2 with their synergistic effects. The continuous production of H2 with recyclability evidenced 2D/2D heterojunction advantages and provides new insight on the role of the hierarchical MXene composite and, thus, would be beneficial for solar energy applications. American Chemical Society 2021 Article PeerReviewed Muhammad Tahir, Muhammad Tahir (2021) Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production. Energy and Fuels, 35 (8). pp. 6807-6822. ISSN 0887-0624 http://dx.doi.org/10.1021/acs.energyfuels.1c00204
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
Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production
description Well-designed, two-dimensional hierarchical g-C3N4 (2D HCN) nanosheets anchored over two-dimensional exfoliated titanium carbide (2D TiC) multilayers embedded with in situ grown TiO2 were fabricated for stimulating H2 production under visible light. The Ti3C2 efficiency was directly influenced by varying the etching time ranging from 24 to 96 h. Using optimized 2D TiC multilayers embedded with TiO2 (anatase) with etchant time 48 h, the highest H2 yield of 182.5 µmol g-1 h-1 was attained, an obviously higher production rate than using etchant times of 24, 72, and 96 h, due to improved charge carrier separation efficiency through heterojunction formation. Hierarchical g-C3N4 exhibited 1.26 times more H2 yield than using bulk g-C3N4 due to efficient migration and transportation of charge carrier. The H2 production rate of the optimized 10TiC-48/HCN 2D/2D heterojunction reached 310 µmol g-1 h-1 which is ~1.93, 2.33, and 2.95 times higher than it was produced over TiC-48, HCN, and CN, respectively. This proficient hydrogen production was due to faster transfer of electrons from HCN to TiC-MXene due to higher conductivity and formation of heterojunction between HCN and TiO2 with their synergistic effects. The continuous production of H2 with recyclability evidenced 2D/2D heterojunction advantages and provides new insight on the role of the hierarchical MXene composite and, thus, would be beneficial for solar energy applications.
format Article
author Muhammad Tahir, Muhammad Tahir
author_facet Muhammad Tahir, Muhammad Tahir
author_sort Muhammad Tahir, Muhammad Tahir
title Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production
title_short Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production
title_full Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production
title_fullStr Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production
title_full_unstemmed Investigating the influential effect of etchant time in constructing 2D/2D HCN/MXene heterojunction with controlled growth of TiO2 NPs for stimulating photocatalytic H2 production
title_sort investigating the influential effect of etchant time in constructing 2d/2d hcn/mxene heterojunction with controlled growth of tio2 nps for stimulating photocatalytic h2 production
publisher American Chemical Society
publishDate 2021
url http://eprints.utm.my/id/eprint/95111/
http://dx.doi.org/10.1021/acs.energyfuels.1c00204
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score 13.211869

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