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Article: The influence of cobalt doping on photocatalytic nano-titania: crystal chemistry and amorphicity

TitleThe influence of cobalt doping on photocatalytic nano-titania: crystal chemistry and amorphicity
Authors
KeywordsAmorphous Content
Anatase
Formic Acid
Methylene Blue
Photocatalytic Activity
Rutile
Issue Date2007
PublisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/jssc
Citation
Journal of Solid State Chemistry, 2007, v. 180 n. 10, p. 2905-2915 How to Cite?
AbstractPhotocatalysts of nominal composition (Ti1-xCox)O2-δ with 0.001≤x≤0.05 were prepared via a sol-gel technique followed by air firing (200-1000 °C). The incorporation of cobalt inhibited crystal growth and slightly raised the anatase to rutile transformation temperature (∼700 °C). An amorphous component was invariably significant with the maximum content (41-53 wt%) appearing simultaneously with the removal of anatase, suggesting that rutile crystallizes via an aperiodic structure. While the introduction of cobalt shifted the apparent band gap to visible light energies this did not enhance performance as there was limited miscibility of cobalt in titania, non-catalytic secondary phases were present, and active Ti3+ sites were displaced by cobalt. © 2007 Elsevier Inc. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/150426
ISSN
2015 Impact Factor: 2.265
2015 SCImago Journal Rankings: 0.703
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLim, SHen_US
dc.contributor.authorFerraris, Cen_US
dc.contributor.authorSchreyer, Men_US
dc.contributor.authorShih, Ken_US
dc.contributor.authorLeckie, JOen_US
dc.contributor.authorWhite, TJen_US
dc.date.accessioned2012-06-26T06:04:39Z-
dc.date.available2012-06-26T06:04:39Z-
dc.date.issued2007en_US
dc.identifier.citationJournal of Solid State Chemistry, 2007, v. 180 n. 10, p. 2905-2915en_US
dc.identifier.issn0022-4596en_US
dc.identifier.urihttp://hdl.handle.net/10722/150426-
dc.description.abstractPhotocatalysts of nominal composition (Ti1-xCox)O2-δ with 0.001≤x≤0.05 were prepared via a sol-gel technique followed by air firing (200-1000 °C). The incorporation of cobalt inhibited crystal growth and slightly raised the anatase to rutile transformation temperature (∼700 °C). An amorphous component was invariably significant with the maximum content (41-53 wt%) appearing simultaneously with the removal of anatase, suggesting that rutile crystallizes via an aperiodic structure. While the introduction of cobalt shifted the apparent band gap to visible light energies this did not enhance performance as there was limited miscibility of cobalt in titania, non-catalytic secondary phases were present, and active Ti3+ sites were displaced by cobalt. © 2007 Elsevier Inc. All rights reserved.en_US
dc.languageengen_US
dc.publisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/jsscen_US
dc.relation.ispartofJournal of Solid State Chemistryen_US
dc.subjectAmorphous Contenten_US
dc.subjectAnataseen_US
dc.subjectFormic Aciden_US
dc.subjectMethylene Blueen_US
dc.subjectPhotocatalytic Activityen_US
dc.subjectRutileen_US
dc.titleThe influence of cobalt doping on photocatalytic nano-titania: crystal chemistry and amorphicityen_US
dc.typeArticleen_US
dc.identifier.emailShih, K: kshih@hkucc.hku.hken_US
dc.identifier.authorityShih, K=rp00167en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.jssc.2007.08.021en_US
dc.identifier.scopuseid_2-s2.0-35248874281en_US
dc.identifier.hkuros148374-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-35248874281&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume180en_US
dc.identifier.issue10en_US
dc.identifier.spage2905en_US
dc.identifier.epage2915en_US
dc.identifier.isiWOS:000251462100034-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLim, SH=7404081018en_US
dc.identifier.scopusauthoridFerraris, C=7005464365en_US
dc.identifier.scopusauthoridSchreyer, M=7003796484en_US
dc.identifier.scopusauthoridShih, K=14072108900en_US
dc.identifier.scopusauthoridLeckie, JO=7006717360en_US
dc.identifier.scopusauthoridWhite, TJ=7402587158en_US

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