Enhanced visible-light activity of titania via confinement inside carbon nanotubes

Handle URI:
http://hdl.handle.net/10754/561881
Title:
Enhanced visible-light activity of titania via confinement inside carbon nanotubes
Authors:
Chen, Wei; Fan, Zhongli; Zhang, Bei; Ma, Guijun; Takanabe, Kazuhiro ( 0000-0001-5374-9451 ) ; Zhang, Xixiang ( 0000-0002-3478-6414 ) ; Lai, Zhiping ( 0000-0001-9555-6009 )
Abstract:
Titania confined inside carbon nanotubes (CNTs) was synthesized using a restrained hydrolysis method. Raman spectra and magnetic measurements using a SQUID magnetometer suggested the formation of remarkable oxygen vacancies over the encapsulated TiO 2 in comparison with nanoparticles dispersed on the outer surface of CNTs, extending the photoresponse of TiO 2 from the UV to the visible-light region. The CNT-confined TiO 2 exhibited improved visible-light activity in the degradation of methylene blue (MB) relative to the outside titania and commercial P25, which is attributed to the modification of the electronic structure of TiO 2 induced by the unique confinement inside CNTs. These results provide further insight into the effect of confinement within CNTs, and the composites are expected to be promising for applications in visible-light photocatalysis. © 2011 American Chemical Society.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC); Materials Science and Engineering Program; Chemical and Biological Engineering Program; Advanced Membranes and Porous Materials Research Center; Core Labs; Catalysis for Energy Conversion (CatEC)
Publisher:
American Chemical Society
Journal:
Journal of the American Chemical Society
Issue Date:
28-Sep-2011
DOI:
10.1021/ja205997x
PubMed ID:
21894970
Type:
Article
ISSN:
00027863
Sponsors:
We thank Dr. Y. Yang, Q. Wang, and X. Liu from King Abdullah University of Science and Technology (KAUST) for their help with Raman spectroscopy, TEM, and drawing, respectively. We also acknowledge the faculty distribution fund of KAUST.
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Chemical and Biological Engineering Program; Materials Science and Engineering Program; KAUST Catalysis Center (KCC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChen, Weien
dc.contributor.authorFan, Zhonglien
dc.contributor.authorZhang, Beien
dc.contributor.authorMa, Guijunen
dc.contributor.authorTakanabe, Kazuhiroen
dc.contributor.authorZhang, Xixiangen
dc.contributor.authorLai, Zhipingen
dc.date.accessioned2015-08-03T09:33:12Zen
dc.date.available2015-08-03T09:33:12Zen
dc.date.issued2011-09-28en
dc.identifier.issn00027863en
dc.identifier.pmid21894970en
dc.identifier.doi10.1021/ja205997xen
dc.identifier.urihttp://hdl.handle.net/10754/561881en
dc.description.abstractTitania confined inside carbon nanotubes (CNTs) was synthesized using a restrained hydrolysis method. Raman spectra and magnetic measurements using a SQUID magnetometer suggested the formation of remarkable oxygen vacancies over the encapsulated TiO 2 in comparison with nanoparticles dispersed on the outer surface of CNTs, extending the photoresponse of TiO 2 from the UV to the visible-light region. The CNT-confined TiO 2 exhibited improved visible-light activity in the degradation of methylene blue (MB) relative to the outside titania and commercial P25, which is attributed to the modification of the electronic structure of TiO 2 induced by the unique confinement inside CNTs. These results provide further insight into the effect of confinement within CNTs, and the composites are expected to be promising for applications in visible-light photocatalysis. © 2011 American Chemical Society.en
dc.description.sponsorshipWe thank Dr. Y. Yang, Q. Wang, and X. Liu from King Abdullah University of Science and Technology (KAUST) for their help with Raman spectroscopy, TEM, and drawing, respectively. We also acknowledge the faculty distribution fund of KAUST.en
dc.publisherAmerican Chemical Societyen
dc.titleEnhanced visible-light activity of titania via confinement inside carbon nanotubesen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentChemical and Biological Engineering Programen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentCore Labsen
dc.contributor.departmentCatalysis for Energy Conversion (CatEC)en
dc.identifier.journalJournal of the American Chemical Societyen
kaust.authorFan, Zhonglien
kaust.authorZhang, Beien
kaust.authorMa, Guijunen
kaust.authorTakanabe, Kazuhiroen
kaust.authorZhang, Xixiangen
kaust.authorLai, Zhipingen
kaust.authorChen, Weien
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