Comprehensive Study of All-Solid-State Z-Scheme Photocatalytic Systems of ZnO/Pt/CdZnS

Handle URI:
http://hdl.handle.net/10754/625403
Title:
Comprehensive Study of All-Solid-State Z-Scheme Photocatalytic Systems of ZnO/Pt/CdZnS
Authors:
Isimjan, Tayirjan Taylor ( 0000-0003-1735-481X ) ; Maity, Partha ( 0000-0002-0293-7118 ) ; Llorca, Jordi ( 0000-0002-7447-9582 ) ; Ahmed, Toseef; Parida, Manas R. ( 0000-0003-2091-4507 ) ; Mohammed, Omar F. ( 0000-0001-8500-1130 ) ; Idriss, Hicham ( 0000-0001-8614-7019 )
Abstract:
We have investigated a Z-scheme based on a ZnO/Pt/CdZnS photocatalyst, active in the presence of a complex medium composed of acetic acid and benzyl alcohol, the effects of which on the catalyst stability and performance are studied. Transmission electron microscopy images showed uniformly dispersed sub-nanometer Pt particles. Inductively coupled plasma and X-ray photoelectron spectroscopy analyses suggested that Pt is sandwiched between ZnO and CdZnS. An apparent quantum yield (AQY) of 34% was obtained over the [ZnO]4/1 wt %Pt/CdZnS system at 360 nm, 2.5-fold higher than that of 1%Pt/CdZnS (14%). Furthermore, an AQY of 16% was observed using [ZnO]4/1 wt %Pt/CdZnS, which was comparable to that of 1 wt %Pt/CdZnS (10%) at 460 nm. On the basis of these results, we proposed a charge transfer mechanism, which was confirmed through femtosecond transient absorption spectroscopy. Finally, we identified the two main factors that affected the stability of the catalyst, which were the sacrificial reagent and the acidic pH.
KAUST Department:
SABIC - Corporate Research and Innovation Center (CRI) at KAUST; Physical Sciences and Engineering (PSE) Division
Citation:
Isimjan TT, Maity P, Llorca J, Ahmed T, Parida MR, et al. (2017) Comprehensive Study of All-Solid-State Z-Scheme Photocatalytic Systems of ZnO/Pt/CdZnS. ACS Omega 2: 4828–4837. Available: http://dx.doi.org/10.1021/acsomega.7b00767.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Omega
Issue Date:
22-Aug-2017
DOI:
10.1021/acsomega.7b00767
Type:
Article
ISSN:
2470-1343; 2470-1343
Sponsors:
This work was financially supported by SABIC-CRD at KAUST. J.L. is Serra Húnter Fellow and is grateful to the ICREA Academia program and MINECO/FEDER grant ENE2015-63969-R.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acsomega.7b00767
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorIsimjan, Tayirjan Tayloren
dc.contributor.authorMaity, Parthaen
dc.contributor.authorLlorca, Jordien
dc.contributor.authorAhmed, Toseefen
dc.contributor.authorParida, Manas R.en
dc.contributor.authorMohammed, Omar F.en
dc.contributor.authorIdriss, Hichamen
dc.date.accessioned2017-08-28T10:28:00Z-
dc.date.available2017-08-28T10:28:00Z-
dc.date.issued2017-08-22en
dc.identifier.citationIsimjan TT, Maity P, Llorca J, Ahmed T, Parida MR, et al. (2017) Comprehensive Study of All-Solid-State Z-Scheme Photocatalytic Systems of ZnO/Pt/CdZnS. ACS Omega 2: 4828–4837. Available: http://dx.doi.org/10.1021/acsomega.7b00767.en
dc.identifier.issn2470-1343en
dc.identifier.issn2470-1343en
dc.identifier.doi10.1021/acsomega.7b00767en
dc.identifier.urihttp://hdl.handle.net/10754/625403-
dc.description.abstractWe have investigated a Z-scheme based on a ZnO/Pt/CdZnS photocatalyst, active in the presence of a complex medium composed of acetic acid and benzyl alcohol, the effects of which on the catalyst stability and performance are studied. Transmission electron microscopy images showed uniformly dispersed sub-nanometer Pt particles. Inductively coupled plasma and X-ray photoelectron spectroscopy analyses suggested that Pt is sandwiched between ZnO and CdZnS. An apparent quantum yield (AQY) of 34% was obtained over the [ZnO]4/1 wt %Pt/CdZnS system at 360 nm, 2.5-fold higher than that of 1%Pt/CdZnS (14%). Furthermore, an AQY of 16% was observed using [ZnO]4/1 wt %Pt/CdZnS, which was comparable to that of 1 wt %Pt/CdZnS (10%) at 460 nm. On the basis of these results, we proposed a charge transfer mechanism, which was confirmed through femtosecond transient absorption spectroscopy. Finally, we identified the two main factors that affected the stability of the catalyst, which were the sacrificial reagent and the acidic pH.en
dc.description.sponsorshipThis work was financially supported by SABIC-CRD at KAUST. J.L. is Serra Húnter Fellow and is grateful to the ICREA Academia program and MINECO/FEDER grant ENE2015-63969-R.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acsomega.7b00767en
dc.rightsThis is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.en
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.htmlen
dc.titleComprehensive Study of All-Solid-State Z-Scheme Photocatalytic Systems of ZnO/Pt/CdZnSen
dc.typeArticleen
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUSTen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalACS Omegaen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionInstitute of Energy Technologies, Department of Chemical Engineering, and Barcelona Research Center in Multiscale Science and Engineering, Technical University of Catalonia, EEBE, Barcelona 08930, Spainen
dc.contributor.institutionSABIC Technology Center, Riyadh 11422, Kingdom of Saudi Arabiaen
kaust.authorIsimjan, Tayirjan Tayloren
kaust.authorMaity, Parthaen
kaust.authorParida, Manas R.en
kaust.authorMohammed, Omar F.en
kaust.authorIdriss, Hichamen
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