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Article: Native defects in zno: Effect on dye adsorption and photocatalytic degradation

TitleNative defects in zno: Effect on dye adsorption and photocatalytic degradation
Authors
Issue Date2013
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jpccck/
Citation
Journal Of Physical Chemistry C, 2013, v. 117 n. 23, p. 12218-12228 How to Cite?
AbstractWe investigated the influence of native defects on the adsorption and photocatalytic degradation of anionic and cationic dyes for different ZnO nanoparticles. We found that there was no relationship between the dye adsorption onto ZnO nanoparticles and their photocatalytic activity. Fast photocatalytic degradation could be observed for samples having a low concentration of nonradiative defects (and thus low recombination losses of photogenerated carriers), regardless of the amount of dye adsorbed onto the surface. While the absorption of cationic dyes was not significantly affected by ZnO nanoparticle properties, dye adsorption of several anionic dyes was strongly affected by native defects in ZnO. The defects involved in the dye adsorption are likely shallow donor centers exhibiting an electron spin resonance peak at g ≈ 1.957, resulting in positively charged sites at the surface. © 2013 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/185485
ISSN
2015 Impact Factor: 4.509
2015 SCImago Journal Rankings: 1.995
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, Fen_US
dc.contributor.authorLeung, YHen_US
dc.contributor.authorDjurišić, ABen_US
dc.contributor.authorNg, AMCen_US
dc.contributor.authorChan, WKen_US
dc.date.accessioned2013-07-30T07:36:53Z-
dc.date.available2013-07-30T07:36:53Z-
dc.date.issued2013en_US
dc.identifier.citationJournal Of Physical Chemistry C, 2013, v. 117 n. 23, p. 12218-12228en_US
dc.identifier.issn1932-7447en_US
dc.identifier.urihttp://hdl.handle.net/10722/185485-
dc.description.abstractWe investigated the influence of native defects on the adsorption and photocatalytic degradation of anionic and cationic dyes for different ZnO nanoparticles. We found that there was no relationship between the dye adsorption onto ZnO nanoparticles and their photocatalytic activity. Fast photocatalytic degradation could be observed for samples having a low concentration of nonradiative defects (and thus low recombination losses of photogenerated carriers), regardless of the amount of dye adsorbed onto the surface. While the absorption of cationic dyes was not significantly affected by ZnO nanoparticle properties, dye adsorption of several anionic dyes was strongly affected by native defects in ZnO. The defects involved in the dye adsorption are likely shallow donor centers exhibiting an electron spin resonance peak at g ≈ 1.957, resulting in positively charged sites at the surface. © 2013 American Chemical Society.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jpccck/en_US
dc.relation.ispartofJournal of Physical Chemistry Cen_US
dc.titleNative defects in zno: Effect on dye adsorption and photocatalytic degradationen_US
dc.typeArticleen_US
dc.identifier.emailDjurišić, AB: dalek@hku.hken_US
dc.identifier.emailChan, WK: waichan@hku.hken_US
dc.identifier.authorityDjurišić, AB=rp00690en_US
dc.identifier.authorityChan, WK=rp00667en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/jp403478qen_US
dc.identifier.scopuseid_2-s2.0-84879125615en_US
dc.identifier.hkuros218994-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84879125615&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume117en_US
dc.identifier.issue23en_US
dc.identifier.spage12218en_US
dc.identifier.epage12228en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLiu, F=55599086400en_US
dc.identifier.scopusauthoridLeung, YH=16042693500en_US
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_US
dc.identifier.scopusauthoridNg, AMC=12140078600en_US
dc.identifier.scopusauthoridChan, WK=13310083000en_US

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