Nano-sized quaternary CuGa2In3S8 as an efficient photocatalyst for solar hydrogen production

Tarek Kandiel; Dalaver H. Anjum; Kazuhiro Takanabe

doi:10.1002/cssc.201402525

Nano-sized quaternary CuGa2In3S8 as an efficient photocatalyst for solar hydrogen production

Tarek Kandiel, Dalaver H. Anjum, Kazuhiro Takanabe

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

21 Scopus citations

Abstract

The synthesis of quaternary metal sulfide (QMS) nanocrystals is challenging because of the difficulty to control their stoichiometry and phase structure. Herein, quaternary CuGa2In3S8 photocatalysts with a primary particle size of ≈4nm are synthesized using a facile hot-injection method by fine-tuning the sulfur source injection temperature and aging time. Characterization of the samples reveals that quaternary CuGa2In3S8 nanocrystals exhibit n-type semiconductor characteristics with a transition band gap of ≈1.8eV. Their flatband potential is located at -0.56V versus the standard hydrogen electrode at pH6.0 and is shifted cathodically by 0.75V in solutions with pH values greater than 12.0. Under optimized conditions, the 1.0wt% Ru-loaded CuGa2In3S8 photocatalyst exhibits a photocatalytic H2 evolution response up to 700nm and an apparent quantum efficiency of (6.9±0.5)% at 560nm. These results indicate clearly that QMS nanocrystals have great potential as nano-photocatalysts for solar H2 production. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English (US)
Pages (from-to)	3112-3121
Number of pages	10
Journal	ChemSusChem
Volume	7
Issue number	11
DOIs	https://doi.org/10.1002/cssc.201402525
State	Published - Sep 3 2014

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Funding for this work was provided by Saudi Aramco under contract 6600024505/01. T. A. K. would like to thank the Chemistry Department, Faculty of Science, Sohag University for granting him a leave of absence.

ASJC Scopus subject areas

General Energy
Environmental Chemistry
General Materials Science
General Chemical Engineering

UN SDGs

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

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10.1002/cssc.201402525

Cite this

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title = "Nano-sized quaternary CuGa2In3S8 as an efficient photocatalyst for solar hydrogen production",

abstract = "The synthesis of quaternary metal sulfide (QMS) nanocrystals is challenging because of the difficulty to control their stoichiometry and phase structure. Herein, quaternary CuGa2In3S8 photocatalysts with a primary particle size of ≈4nm are synthesized using a facile hot-injection method by fine-tuning the sulfur source injection temperature and aging time. Characterization of the samples reveals that quaternary CuGa2In3S8 nanocrystals exhibit n-type semiconductor characteristics with a transition band gap of ≈1.8eV. Their flatband potential is located at -0.56V versus the standard hydrogen electrode at pH6.0 and is shifted cathodically by 0.75V in solutions with pH values greater than 12.0. Under optimized conditions, the 1.0wt% Ru-loaded CuGa2In3S8 photocatalyst exhibits a photocatalytic H2 evolution response up to 700nm and an apparent quantum efficiency of (6.9±0.5)% at 560nm. These results indicate clearly that QMS nanocrystals have great potential as nano-photocatalysts for solar H2 production. {\textcopyright} 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

author = "Tarek Kandiel and Anjum, {Dalaver H.} and Kazuhiro Takanabe",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Funding for this work was provided by Saudi Aramco under contract 6600024505/01. T. A. K. would like to thank the Chemistry Department, Faculty of Science, Sohag University for granting him a leave of absence.",

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AU - Kandiel, Tarek

AU - Anjum, Dalaver H.

AU - Takanabe, Kazuhiro

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Funding for this work was provided by Saudi Aramco under contract 6600024505/01. T. A. K. would like to thank the Chemistry Department, Faculty of Science, Sohag University for granting him a leave of absence.

PY - 2014/9/3

Y1 - 2014/9/3

N2 - The synthesis of quaternary metal sulfide (QMS) nanocrystals is challenging because of the difficulty to control their stoichiometry and phase structure. Herein, quaternary CuGa2In3S8 photocatalysts with a primary particle size of ≈4nm are synthesized using a facile hot-injection method by fine-tuning the sulfur source injection temperature and aging time. Characterization of the samples reveals that quaternary CuGa2In3S8 nanocrystals exhibit n-type semiconductor characteristics with a transition band gap of ≈1.8eV. Their flatband potential is located at -0.56V versus the standard hydrogen electrode at pH6.0 and is shifted cathodically by 0.75V in solutions with pH values greater than 12.0. Under optimized conditions, the 1.0wt% Ru-loaded CuGa2In3S8 photocatalyst exhibits a photocatalytic H2 evolution response up to 700nm and an apparent quantum efficiency of (6.9±0.5)% at 560nm. These results indicate clearly that QMS nanocrystals have great potential as nano-photocatalysts for solar H2 production. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - The synthesis of quaternary metal sulfide (QMS) nanocrystals is challenging because of the difficulty to control their stoichiometry and phase structure. Herein, quaternary CuGa2In3S8 photocatalysts with a primary particle size of ≈4nm are synthesized using a facile hot-injection method by fine-tuning the sulfur source injection temperature and aging time. Characterization of the samples reveals that quaternary CuGa2In3S8 nanocrystals exhibit n-type semiconductor characteristics with a transition band gap of ≈1.8eV. Their flatband potential is located at -0.56V versus the standard hydrogen electrode at pH6.0 and is shifted cathodically by 0.75V in solutions with pH values greater than 12.0. Under optimized conditions, the 1.0wt% Ru-loaded CuGa2In3S8 photocatalyst exhibits a photocatalytic H2 evolution response up to 700nm and an apparent quantum efficiency of (6.9±0.5)% at 560nm. These results indicate clearly that QMS nanocrystals have great potential as nano-photocatalysts for solar H2 production. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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Nano-sized quaternary CuGa2In3S8 as an efficient photocatalyst for solar hydrogen production

Abstract

Bibliographical note

ASJC Scopus subject areas

UN SDGs

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