Staff View: Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?

Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?

Graphitic carbon nitride (g-C?N?) holds significant promise for hydrogen production due to its visible-light activity, stability, and cost-effectiveness. However, it faces challenges related to high charge recombination and trapping, which ultimately hinders its photocatalytic efficiency. In this st...

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Main Authors:	Pandi K., Kangeyan K.P., Lakhera S.K., Kiong T.S., Bernaurdshaw N.
Other Authors:	57218799806
Format:	Article
Published:	Elsevier Ltd 2025
Subjects:	Carbon nitride Charge transfer Hydrates Hydration Hydrogen production Nickel Photoluminescence spectroscopy Co catalysts G-C3N4 Graphitic carbon nitrides H 2 production High charges Melem hydrate Metal nitrate hydroxide Microrods Performance Visible-light activity Cost effectiveness
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spelling	my.uniten.dspace-364422025-03-03T15:42:27Z Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co? Pandi K. Kangeyan K.P. Lakhera S.K. Kiong T.S. Bernaurdshaw N. 57218799806 58786302500 56511969200 57216824752 6603045211 Carbon nitride Charge transfer Hydrates Hydration Hydrogen production Nickel Photoluminescence spectroscopy Co catalysts G-C3N4 Graphitic carbon nitrides H 2 production High charges Melem hydrate Metal nitrate hydroxide Microrods Performance Visible-light activity Cost effectiveness Graphitic carbon nitride (g-C?N?) holds significant promise for hydrogen production due to its visible-light activity, stability, and cost-effectiveness. However, it faces challenges related to high charge recombination and trapping, which ultimately hinders its photocatalytic efficiency. In this study, we address these limitations by first modifying g-C?N? nanosheets into rods through the formation of melem hydrate using an ultrasonication method. Subsequently, the melem hydrate is transformed into g-C?N? micro-rods (CNR). These CNR micro-rods are further coordinated with transition metals (Ni2?, Co2?, and Cu2?) via a hydrothermal process. Among these samples, the Cu-coordinated micro-rods exhibit the highest photocatalytic hydrogen production rate, achieving 4 mmol/g/h. This performance surpasses previously reported novel metal-coated g-C?N? materials. Notably, when compared to Ni and Co, the Cu-coordinated g-C?N? produces 2.8- and 3.6-times higher hydrogen, respectively. The enhanced performance is attributed to faster interfacial charge transfer kinetics between g-C?N? micro-rods and Cu, as evidenced by the highest kNT value of 0.81 ns?1 and kET value of 0.16 ns?1, measured using time-resolved photoluminescence spectroscopy. ? 2024 Elsevier Ltd Final 2025-03-03T07:42:27Z 2025-03-03T07:42:27Z 2024 Article 10.1016/j.mtsust.2024.100942 2-s2.0-85200600679 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85200600679&doi=10.1016%2fj.mtsust.2024.100942&partnerID=40&md5=5d231d021cdb30836cb3c4fa2639d2d3 https://irepository.uniten.edu.my/handle/123456789/36442 27 100942 Elsevier Ltd Scopus
institution	Universiti Tenaga Nasional
building	UNITEN Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Tenaga Nasional
content_source	UNITEN Institutional Repository
url_provider	http://dspace.uniten.edu.my/
topic	Carbon nitride Charge transfer Hydrates Hydration Hydrogen production Nickel Photoluminescence spectroscopy Co catalysts G-C3N4 Graphitic carbon nitrides H 2 production High charges Melem hydrate Metal nitrate hydroxide Microrods Performance Visible-light activity Cost effectiveness
spellingShingle	Carbon nitride Charge transfer Hydrates Hydration Hydrogen production Nickel Photoluminescence spectroscopy Co catalysts G-C3N4 Graphitic carbon nitrides H 2 production High charges Melem hydrate Metal nitrate hydroxide Microrods Performance Visible-light activity Cost effectiveness Pandi K. Kangeyan K.P. Lakhera S.K. Kiong T.S. Bernaurdshaw N. Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?
description	Graphitic carbon nitride (g-C?N?) holds significant promise for hydrogen production due to its visible-light activity, stability, and cost-effectiveness. However, it faces challenges related to high charge recombination and trapping, which ultimately hinders its photocatalytic efficiency. In this study, we address these limitations by first modifying g-C?N? nanosheets into rods through the formation of melem hydrate using an ultrasonication method. Subsequently, the melem hydrate is transformed into g-C?N? micro-rods (CNR). These CNR micro-rods are further coordinated with transition metals (Ni2?, Co2?, and Cu2?) via a hydrothermal process. Among these samples, the Cu-coordinated micro-rods exhibit the highest photocatalytic hydrogen production rate, achieving 4 mmol/g/h. This performance surpasses previously reported novel metal-coated g-C?N? materials. Notably, when compared to Ni and Co, the Cu-coordinated g-C?N? produces 2.8- and 3.6-times higher hydrogen, respectively. The enhanced performance is attributed to faster interfacial charge transfer kinetics between g-C?N? micro-rods and Cu, as evidenced by the highest kNT value of 0.81 ns?1 and kET value of 0.16 ns?1, measured using time-resolved photoluminescence spectroscopy. ? 2024 Elsevier Ltd
author2	57218799806
author_facet	57218799806 Pandi K. Kangeyan K.P. Lakhera S.K. Kiong T.S. Bernaurdshaw N.
format	Article
author	Pandi K. Kangeyan K.P. Lakhera S.K. Kiong T.S. Bernaurdshaw N.
author_sort	Pandi K.
title	Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?
title_short	Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?
title_full	Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?
title_fullStr	Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?
title_full_unstemmed	Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?
title_sort	melem hydrate-derived g-c3n4 micro-rods coordinated with cu2+: why is cu a superior cocatalyst compared to ni and co?
publisher	Elsevier Ltd
publishDate	2025
_version_	1825816062761893888
score	13.244413

Melem Hydrate-Derived g-C3N4 Micro-Rods Coordinated with Cu2+: Why is Cu a superior cocatalyst compared to Ni and co?

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