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dc.contributor.authorLu, Yang
dc.contributor.authorWang, Guozhong
dc.contributor.authorZhang, Haimin
dc.contributor.authorZhang, Yunxia
dc.contributor.authorKang, Shenghong
dc.contributor.authorZhao, Huijun
dc.date.accessioned2017-10-26T22:33:41Z
dc.date.available2017-10-26T22:33:41Z
dc.date.issued2015
dc.identifier.issn2046-2069
dc.identifier.doi10.1039/c5ra08571c
dc.identifier.urihttp://hdl.handle.net/10072/124906
dc.description.abstractIn this work, vertically aligned anatase TiO2 single crystal nanosheets with laterally exposed {001} facets onto a conducting FTO substrate (VATN) were successfully synthesised using hydrofluoric acid (40 wt%) as a crystal facet controlling agent by a simple hydrothermal method. The as-synthesised VATN without calcination exhibited a good crystalline structure, and was used as a photoanode showing superior photoelectrocatalytic activity toward water oxidation under UV irradiation. After thermal treatment at 550 °C for 2 h, the photoelectrocatalytic activity of the VATN photoanode was almost 2.6 times that for unsintered VATN under the same experimental conditions, which could be mainly due to the surface passivation role of surface fluorine in unsintered VATN to decrease the photoelectrocatalytic activity. A photoelectrochemical method was used to manifest the photoelectron transport properties inside VATN photoanodes and concurrently quantify the inherent resistances (R0) of UV illuminated photoanodes before and after calcination. The results demonstrated that the determined R0 values were respectively 155 Ω and 66 Ω for VATN photoanodes before and after calcination, inversely proportional to their photoelectrocatalytic activities. Compared to VATN before calcination, a significantly decreased R0 value of VATN after calcination further confirmed the presence of surface fluorine in VATN unfavorable for photoelectron transport inside a photocatalyst film. This work provided direct evidence to prove the intrinsic photoelectron transport properties of {001} faceted anatase TiO2 nanosheet array film photoanodes in the presence and absence of surface fluorine.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.relation.ispartofpagefrom55438
dc.relation.ispartofpageto55444
dc.relation.ispartofissue68
dc.relation.ispartofjournalRSC Advances
dc.relation.ispartofvolume5
dc.subject.fieldofresearchChemical Sciences not elsewhere classified
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchcode039999
dc.subject.fieldofresearchcode03
dc.titlePhotoelectrochemical manifestation of intrinsic photoelectron transport properties of vertically aligned {001} faceted single crystal TiO2 nanosheet films
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2015 Royal Society of Chemistry. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorZhao, Huijun
gro.griffith.authorZhang, Haimin


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