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

Handle URI:
http://hdl.handle.net/10754/563750
Title:
Nano-sized quaternary CuGa2In3S8 as an efficient photocatalyst for solar hydrogen production
Authors:
Kandiel, Tarek; Anjum, Dalaver H.; Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
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.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Advanced Nanofabrication, Imaging and Characterization Core Lab; Chemical Science Program; Core Labs; Catalysis for Energy Conversion (CatEC)
Publisher:
Wiley-Blackwell
Journal:
ChemSusChem
Issue Date:
3-Sep-2014
DOI:
10.1002/cssc.201402525
PubMed ID:
25187083
Type:
Article
ISSN:
18645631
Sponsors:
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.
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorKandiel, Tareken
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorTakanabe, Kazuhiroen
dc.date.accessioned2015-08-03T12:08:51Zen
dc.date.available2015-08-03T12:08:51Zen
dc.date.issued2014-09-03en
dc.identifier.issn18645631en
dc.identifier.pmid25187083-
dc.identifier.doi10.1002/cssc.201402525en
dc.identifier.urihttp://hdl.handle.net/10754/563750en
dc.description.abstractThe 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.en
dc.description.sponsorshipFunding 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.en
dc.publisherWiley-Blackwellen
dc.subjectCopperen
dc.subjectGalliumen
dc.subjectHydrogenen
dc.subjectIndiumen
dc.subjectPhotochemistryen
dc.titleNano-sized quaternary CuGa2In3S8 as an efficient photocatalyst for solar hydrogen productionen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentCore Labsen
dc.contributor.departmentCatalysis for Energy Conversion (CatEC)en
dc.identifier.journalChemSusChemen
dc.contributor.institutionDepartment of Chemistry, Faculty of Science, Sohag UniversitySohag 82524, Egypten
kaust.authorKandiel, Tareken
kaust.authorAnjum, Dalaver H.en
kaust.authorTakanabe, Kazuhiroen

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