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Article: Single-crystalline and reactive facets exposed anatase TiO2 nanofibers with enhanced photocatalytic properties

TitleSingle-crystalline and reactive facets exposed anatase TiO2 nanofibers with enhanced photocatalytic properties
Authors
Issue Date2011
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp
Citation
Journal Of Materials Chemistry, 2011, v. 21 n. 18, p. 6718-6724 How to Cite?
Abstract
Single-crystalline anatase TiO2 nanofibers with highly reactive {001} facets were synthesized from layered potassium titanate K 2Ti 2O 5via topotactic transformation in ion-exchange and dehydration. The cuboid fibers showed one-dimensional (1-D) orientation in the [010] direction and {001} as well as {100} facets enclosing along the longitudinal dimension. The structural evolution was deduced from XRD, SEM and TEM characterizations, which revealed that the highly reactive {001} facets were derived from the interlayer splitting and exfoliation of the layered precursors in a surfactant-free way. Photoluminescence (PL) measurements witnessed the efficient separation and transfer of photoinduced charge carriers in the single-crystalline and reactive facets enclosed TiO2 nanofibers. Sequently, highly efficient photocatalytic property of the nanofibers was demonstrated by phenol degradation and H 2 evolution. Phenol degradation rate of nanofibers is 2.7 times of the irregular-shaped nanoparticle counterparts with the same crystal phase and similar specific surface area. In photocatalytic evolution of H 2, nanofibers presented much higher and more stable activity than both nanoparticle counterparts and P25 benchmark. Charge carrier highways provided by single-crystalline 1-D structures and efficient surface reactivity offered by exposed facets are the two key factors for the enhanced properties. © 2011 The Royal Society of Chemistry.
Persistent Identifierhttp://hdl.handle.net/10722/168524
ISSN
2013 Impact Factor: 6.626
ISI Accession Number ID
References

 

Author Affiliations
  1. Nanjing University of Technology
  2. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorLi, Wen_US
dc.contributor.authorBai, Yen_US
dc.contributor.authorLiu, Wen_US
dc.contributor.authorLiu, Cen_US
dc.contributor.authorYang, Zen_US
dc.contributor.authorFeng, Xen_US
dc.contributor.authorLu, Xen_US
dc.contributor.authorChan, KYen_US
dc.date.accessioned2012-10-08T03:20:01Z-
dc.date.available2012-10-08T03:20:01Z-
dc.date.issued2011en_US
dc.identifier.citationJournal Of Materials Chemistry, 2011, v. 21 n. 18, p. 6718-6724en_US
dc.identifier.issn0959-9428en_US
dc.identifier.urihttp://hdl.handle.net/10722/168524-
dc.description.abstractSingle-crystalline anatase TiO2 nanofibers with highly reactive {001} facets were synthesized from layered potassium titanate K 2Ti 2O 5via topotactic transformation in ion-exchange and dehydration. The cuboid fibers showed one-dimensional (1-D) orientation in the [010] direction and {001} as well as {100} facets enclosing along the longitudinal dimension. The structural evolution was deduced from XRD, SEM and TEM characterizations, which revealed that the highly reactive {001} facets were derived from the interlayer splitting and exfoliation of the layered precursors in a surfactant-free way. Photoluminescence (PL) measurements witnessed the efficient separation and transfer of photoinduced charge carriers in the single-crystalline and reactive facets enclosed TiO2 nanofibers. Sequently, highly efficient photocatalytic property of the nanofibers was demonstrated by phenol degradation and H 2 evolution. Phenol degradation rate of nanofibers is 2.7 times of the irregular-shaped nanoparticle counterparts with the same crystal phase and similar specific surface area. In photocatalytic evolution of H 2, nanofibers presented much higher and more stable activity than both nanoparticle counterparts and P25 benchmark. Charge carrier highways provided by single-crystalline 1-D structures and efficient surface reactivity offered by exposed facets are the two key factors for the enhanced properties. © 2011 The Royal Society of Chemistry.en_US
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.aspen_US
dc.relation.ispartofJournal of Materials Chemistryen_US
dc.titleSingle-crystalline and reactive facets exposed anatase TiO2 nanofibers with enhanced photocatalytic propertiesen_US
dc.typeArticleen_US
dc.identifier.emailChan, KY:hrsccky@hku.hken_US
dc.identifier.authorityChan, KY=rp00662en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/c1jm10115cen_US
dc.identifier.scopuseid_2-s2.0-79955071813en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79955071813&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume21en_US
dc.identifier.issue18en_US
dc.identifier.spage6718en_US
dc.identifier.epage6724en_US
dc.identifier.isiWOS:000289692500042-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLi, W=36066858500en_US
dc.identifier.scopusauthoridBai, Y=26643355600en_US
dc.identifier.scopusauthoridLiu, W=24722730200en_US
dc.identifier.scopusauthoridLiu, C=35230582900en_US
dc.identifier.scopusauthoridYang, Z=7405433667en_US
dc.identifier.scopusauthoridFeng, X=34769676900en_US
dc.identifier.scopusauthoridLu, X=7404839077en_US
dc.identifier.scopusauthoridChan, KY=7406034142en_US

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