Cover Image

Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light

Synergistically improved Lanthanum (La) and Cobalt (Co) co-modified g-C3N4 was synthesized for photocatalytic H2 generation from methanol-water mixture under UV–visible light irradiation. The g-C3N4 was synthesized by thermal polymerization and co-modification was carried out by wet impregnation met...

Full description

Saved in:
Bibliographic Details
Main Authors: Tasleem, Sehar, Tahir, Muhammad
Format: Article
Published: Elsevier Ltd 2021
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/96147/
http://dx.doi.org/10.1016/j.ijhydene.2021.03.235
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.96147
record_format eprints
spelling my.utm.961472022-07-04T06:43:08Z http://eprints.utm.my/id/eprint/96147/ Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light Tasleem, Sehar Tahir, Muhammad TP Chemical technology Synergistically improved Lanthanum (La) and Cobalt (Co) co-modified g-C3N4 was synthesized for photocatalytic H2 generation from methanol-water mixture under UV–visible light irradiation. The g-C3N4 was synthesized by thermal polymerization and co-modification was carried out by wet impregnation method. Photocatalytic H2 production by Co2/La1-g-C3N4 was carried out in a slurry photoreactor with the highest H2 production of 250 µmol g-1h-1, which was 2.5, 1.35, and 1.25 times increased as compared to pristine g-C3N4, La1-g-C3N4, and Co2-g-C3N4, respectively. The enhanced activity can be associated with the synergistic effect for proficient charge separation due to electron trapping ability of Co and La, and C–H bond cleavage ability of La for enhanced oxidation. Among the sacrificial agents, highest H2 generation rate was observed with triethanolamine which generated 8.1, 3.6, 1.7, 2.4, and 4.2 times boosted H2 generation than water, ethanol, methanol, ethylene glycol, and glycerol, respectivel, because of the effectual binding of triethanolamine onto amine-containing g-C3N4. Moreover, it also depicted good photostability towards photocatalytic H2 generation. Therefore, Co and La co-modification was proved to be effective for efficient charge separation and reduction of charge carrier's recombination and would be beneficial for other solar energy applications. Elsevier Ltd 2021 Article PeerReviewed Tasleem, Sehar and Tahir, Muhammad (2021) Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light. International Journal of Hydrogen Energy, 46 (40). pp. 20995-21012. ISSN 0360-3199 http://dx.doi.org/10.1016/j.ijhydene.2021.03.235
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
Tasleem, Sehar
Tahir, Muhammad
Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light
description Synergistically improved Lanthanum (La) and Cobalt (Co) co-modified g-C3N4 was synthesized for photocatalytic H2 generation from methanol-water mixture under UV–visible light irradiation. The g-C3N4 was synthesized by thermal polymerization and co-modification was carried out by wet impregnation method. Photocatalytic H2 production by Co2/La1-g-C3N4 was carried out in a slurry photoreactor with the highest H2 production of 250 µmol g-1h-1, which was 2.5, 1.35, and 1.25 times increased as compared to pristine g-C3N4, La1-g-C3N4, and Co2-g-C3N4, respectively. The enhanced activity can be associated with the synergistic effect for proficient charge separation due to electron trapping ability of Co and La, and C–H bond cleavage ability of La for enhanced oxidation. Among the sacrificial agents, highest H2 generation rate was observed with triethanolamine which generated 8.1, 3.6, 1.7, 2.4, and 4.2 times boosted H2 generation than water, ethanol, methanol, ethylene glycol, and glycerol, respectivel, because of the effectual binding of triethanolamine onto amine-containing g-C3N4. Moreover, it also depicted good photostability towards photocatalytic H2 generation. Therefore, Co and La co-modification was proved to be effective for efficient charge separation and reduction of charge carrier's recombination and would be beneficial for other solar energy applications.
format Article
author Tasleem, Sehar
Tahir, Muhammad
author_facet Tasleem, Sehar
Tahir, Muhammad
author_sort Tasleem, Sehar
title Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light
title_short Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light
title_full Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light
title_fullStr Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light
title_full_unstemmed Synergistically improved charge separation in bimetallic Co-La modified 3D g-C3N4 for enhanced photocatalytic H-2 production under UV-visible light
title_sort synergistically improved charge separation in bimetallic co-la modified 3d g-c3n4 for enhanced photocatalytic h-2 production under uv-visible light
publisher Elsevier Ltd
publishDate 2021
url http://eprints.utm.my/id/eprint/96147/
http://dx.doi.org/10.1016/j.ijhydene.2021.03.235
_version_ 1738510329734758400
score 13.211869

Similar Items