Synergistic effect of a noble metal free Ni(OH)2 co-catalyst and a ternary ZnIn2S4/g-C3N4 heterojunction for enhanced visible light photocatalytic hydrogen evolution

Lakshmana Reddy Nagappagari; Soumadri Samanta; Nidhi Sharma; Venugopala Rao Battula; Kamalakannan Kailasam

doi:10.1039/c9se00704k

Synergistic effect of a noble metal free Ni(OH)₂ co-catalyst and a ternary ZnIn₂S₄/g-C₃N₄ heterojunction for enhanced visible light photocatalytic hydrogen evolution

Lakshmana Reddy Nagappagari, Soumadri Samanta, Nidhi Sharma, Venugopala Rao Battula, Kamalakannan Kailasam

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

In the present study, we report the synthesis of a ternary chalcogenide (ZnIn₂S₄) based g-C₃N₄ heterojunction composite with non-noble metal Ni(OH)₂ as a co-catalyst for enhanced visible light photocatalytic hydrogen generation. The optimized deposition of Ni(OH)₂ (1 wt%) on ZnIn₂S₄/g-C₃N₄ resulted in 22.5 fold higher activity than that of the one without Ni(OH)₂ under visible light irradiation (λ > 420 nm). And the performance for the hydrogen generation activities of the catalysts is in the order of g-C₃N₄ < ZnIn₂S₄ < ZnIn₂S₄/g-C₃N₄ ≪ ZnIn₂S₄/g-C₃N₄@Ni(OH)₂. Moreover, the optimized heterojunction catalyst showed higher photocatalytic H₂ generation than Pt deposition under similar experimental conditions. Therefore, the synergistic effect of the co-catalyst and ZnIn₂S₄/g-C₃N₄ helped in efficient separation of charge carriers for the selective reduction reaction and minimized charge carrier recombination, which is proven by photoluminescence studies, photocurrent measurements. Thus, the selected heterojunction composite system can be a promising photocatalyst for cleaner hydrogen energy production.

Original language	English
Pages (from-to)	750-759
Number of pages	10
Journal	Sustainable Energy and Fuels
Volume	4
Issue number	2
DOIs	https://doi.org/10.1039/c9se00704k
State	Published - 1 Jan 2020
Externally published	Yes

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/c9se00704k

Cite this

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title = "Synergistic effect of a noble metal free Ni(OH)2 co-catalyst and a ternary ZnIn2S4/g-C3N4 heterojunction for enhanced visible light photocatalytic hydrogen evolution",

abstract = "In the present study, we report the synthesis of a ternary chalcogenide (ZnIn2S4) based g-C3N4 heterojunction composite with non-noble metal Ni(OH)2 as a co-catalyst for enhanced visible light photocatalytic hydrogen generation. The optimized deposition of Ni(OH)2 (1 wt%) on ZnIn2S4/g-C3N4 resulted in 22.5 fold higher activity than that of the one without Ni(OH)2 under visible light irradiation (λ > 420 nm). And the performance for the hydrogen generation activities of the catalysts is in the order of g-C3N4 < ZnIn2S4 < ZnIn2S4/g-C3N4 ≪ ZnIn2S4/g-C3N4@Ni(OH)2. Moreover, the optimized heterojunction catalyst showed higher photocatalytic H2 generation than Pt deposition under similar experimental conditions. Therefore, the synergistic effect of the co-catalyst and ZnIn2S4/g-C3N4 helped in efficient separation of charge carriers for the selective reduction reaction and minimized charge carrier recombination, which is proven by photoluminescence studies, photocurrent measurements. Thus, the selected heterojunction composite system can be a promising photocatalyst for cleaner hydrogen energy production.",

author = "Nagappagari, {Lakshmana Reddy} and Soumadri Samanta and Nidhi Sharma and Battula, {Venugopala Rao} and Kamalakannan Kailasam",

note = "Publisher Copyright: {\textcopyright} 2020 The Royal Society of Chemistry.",

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Synergistic effect of a noble metal free Ni(OH)₂ co-catalyst and a ternary ZnIn₂S₄/g-C₃N₄ heterojunction for enhanced visible light photocatalytic hydrogen evolution. / Nagappagari, Lakshmana Reddy; Samanta, Soumadri; Sharma, Nidhi et al.
In: Sustainable Energy and Fuels, Vol. 4, No. 2, 01.01.2020, p. 750-759.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Synergistic effect of a noble metal free Ni(OH)2 co-catalyst and a ternary ZnIn2S4/g-C3N4 heterojunction for enhanced visible light photocatalytic hydrogen evolution

AU - Nagappagari, Lakshmana Reddy

AU - Samanta, Soumadri

AU - Sharma, Nidhi

AU - Battula, Venugopala Rao

AU - Kailasam, Kamalakannan

PY - 2020/1/1

Y1 - 2020/1/1

N2 - In the present study, we report the synthesis of a ternary chalcogenide (ZnIn2S4) based g-C3N4 heterojunction composite with non-noble metal Ni(OH)2 as a co-catalyst for enhanced visible light photocatalytic hydrogen generation. The optimized deposition of Ni(OH)2 (1 wt%) on ZnIn2S4/g-C3N4 resulted in 22.5 fold higher activity than that of the one without Ni(OH)2 under visible light irradiation (λ > 420 nm). And the performance for the hydrogen generation activities of the catalysts is in the order of g-C3N4 < ZnIn2S4 < ZnIn2S4/g-C3N4 ≪ ZnIn2S4/g-C3N4@Ni(OH)2. Moreover, the optimized heterojunction catalyst showed higher photocatalytic H2 generation than Pt deposition under similar experimental conditions. Therefore, the synergistic effect of the co-catalyst and ZnIn2S4/g-C3N4 helped in efficient separation of charge carriers for the selective reduction reaction and minimized charge carrier recombination, which is proven by photoluminescence studies, photocurrent measurements. Thus, the selected heterojunction composite system can be a promising photocatalyst for cleaner hydrogen energy production.

AB - In the present study, we report the synthesis of a ternary chalcogenide (ZnIn2S4) based g-C3N4 heterojunction composite with non-noble metal Ni(OH)2 as a co-catalyst for enhanced visible light photocatalytic hydrogen generation. The optimized deposition of Ni(OH)2 (1 wt%) on ZnIn2S4/g-C3N4 resulted in 22.5 fold higher activity than that of the one without Ni(OH)2 under visible light irradiation (λ > 420 nm). And the performance for the hydrogen generation activities of the catalysts is in the order of g-C3N4 < ZnIn2S4 < ZnIn2S4/g-C3N4 ≪ ZnIn2S4/g-C3N4@Ni(OH)2. Moreover, the optimized heterojunction catalyst showed higher photocatalytic H2 generation than Pt deposition under similar experimental conditions. Therefore, the synergistic effect of the co-catalyst and ZnIn2S4/g-C3N4 helped in efficient separation of charge carriers for the selective reduction reaction and minimized charge carrier recombination, which is proven by photoluminescence studies, photocurrent measurements. Thus, the selected heterojunction composite system can be a promising photocatalyst for cleaner hydrogen energy production.

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