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Article: Single-crystalline and reactive facets exposed anatase TiO2 nanofibers with enhanced photocatalytic properties
Title | Single-crystalline and reactive facets exposed anatase TiO2 nanofibers with enhanced photocatalytic properties |
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Authors | |
Issue Date | 2011 |
Publisher | Royal 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 Identifier | http://hdl.handle.net/10722/168524 |
ISSN | 2013 Impact Factor: 6.626 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Li, W | en_US |
dc.contributor.author | Bai, Y | en_US |
dc.contributor.author | Liu, W | en_US |
dc.contributor.author | Liu, C | en_US |
dc.contributor.author | Yang, Z | en_US |
dc.contributor.author | Feng, X | en_US |
dc.contributor.author | Lu, X | en_US |
dc.contributor.author | Chan, KY | en_US |
dc.date.accessioned | 2012-10-08T03:20:01Z | - |
dc.date.available | 2012-10-08T03:20:01Z | - |
dc.date.issued | 2011 | en_US |
dc.identifier.citation | Journal Of Materials Chemistry, 2011, v. 21 n. 18, p. 6718-6724 | en_US |
dc.identifier.issn | 0959-9428 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/168524 | - |
dc.description.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. | en_US |
dc.language | eng | en_US |
dc.publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp | en_US |
dc.relation.ispartof | Journal of Materials Chemistry | en_US |
dc.title | Single-crystalline and reactive facets exposed anatase TiO2 nanofibers with enhanced photocatalytic properties | en_US |
dc.type | Article | en_US |
dc.identifier.email | Chan, KY:hrsccky@hku.hk | en_US |
dc.identifier.authority | Chan, KY=rp00662 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1039/c1jm10115c | en_US |
dc.identifier.scopus | eid_2-s2.0-79955071813 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-79955071813&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 21 | en_US |
dc.identifier.issue | 18 | en_US |
dc.identifier.spage | 6718 | en_US |
dc.identifier.epage | 6724 | en_US |
dc.identifier.isi | WOS:000289692500042 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Li, W=36066858500 | en_US |
dc.identifier.scopusauthorid | Bai, Y=26643355600 | en_US |
dc.identifier.scopusauthorid | Liu, W=24722730200 | en_US |
dc.identifier.scopusauthorid | Liu, C=35230582900 | en_US |
dc.identifier.scopusauthorid | Yang, Z=7405433667 | en_US |
dc.identifier.scopusauthorid | Feng, X=34769676900 | en_US |
dc.identifier.scopusauthorid | Lu, X=7404839077 | en_US |
dc.identifier.scopusauthorid | Chan, KY=7406034142 | en_US |
dc.identifier.issnl | 0959-9428 | - |