Reduced recombination and enhanced UV-assisted photocatalysis by highly anisotropic titanates from electrospun TiO2-SiO2 nanostructures

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dc.citation.epage27987en_US
dc.citation.issueNumber53en_US
dc.citation.spage27979en_US
dc.citation.volumeNumber4en_US
dc.contributor.authorBabu, V. J.en_US
dc.contributor.authorVempati S.en_US
dc.contributor.authorRamakrishna, S.en_US
dc.date.accessioned2016-02-08T11:02:08Z
dc.date.available2016-02-08T11:02:08Z
dc.date.issued2014en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractThe surface areas of electrospun fibers/rice grain-shaped nanostructures of TiO2-SiO2 composites were further enhanced after transforming them into thorn or sponge shaped titanates via selective leaching of SiO2, which was reported by our group previously [RSC Adv., 2012, 2, 992]. In this study, we report on their application in photocatalytic activity (PCA) when juxtaposed with photoluminescence (PL). Two defect related bands are observed in PL and their origin is discussed in relation to calcination, crystallization and nucleation effects. The relative PL intensity for sponge shapes was the lowest and hence had the lowest radiative recombination, which suggests carrier trapping at defect centers. This enables the charge carriers to migrate to the surface and participate in the PCA. The results of PCA suggested that the sponge-shaped titanate exhibits the highest degradation rate among all samples. A plausible mechanism for the differences in PCA is proposed based on the variation in the defect-densities. This journal is © the Partner Organisations 2014.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T11:02:08Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2014en
dc.identifier.doi10.1039/c4ra03498hen_US
dc.identifier.issn0204-62069
dc.identifier.urihttp://hdl.handle.net/11693/26604
dc.language.isoEnglishen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.isversionofhttps://doi.org/10.1039/c4ra03498hen_US
dc.source.titleRSC Advancesen_US
dc.subjectDegradationen_US
dc.subjectNanostructuresen_US
dc.subjectPhotocatalysisen_US
dc.subjectTitanium dioxideen_US
dc.subjectDefect-related bandsen_US
dc.subjectDegradation rateen_US
dc.subjectElectrospun fibersen_US
dc.subjectNucleation effecten_US
dc.subjectPhotocatalytic activitiesen_US
dc.subjectPlausible mechanismsen_US
dc.subjectRadiative recombinationen_US
dc.subjectSelective leachingen_US
dc.subjectTitanium compoundsen_US
dc.titleReduced recombination and enhanced UV-assisted photocatalysis by highly anisotropic titanates from electrospun TiO2-SiO2 nanostructuresen_US
dc.typeArticleen_US

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