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dc.contributor.authorZhang, Haiminen_US
dc.contributor.authorLiu, Porunen_US
dc.contributor.authorLiu, Xiaoluen_US
dc.contributor.authorZhang, Shanqingen_US
dc.contributor.authorYao, Xiangdongen_US
dc.contributor.authorAn, Taichengen_US
dc.contributor.authorAmal, Roseen_US
dc.contributor.authorZhao, Huijunen_US
dc.description.abstractThis work reports a facile approach to fabricate a perpendicularly aligned and highly ordered TiO2 nanorod/nanotube (NR/NT) adjacent film by directly anodizing a modified titanium foil. The titanium foil substrate was modified with a layer of crystalline TiO2 film via a hydrothermal process in 0.05 M (NH4)2S2O8. The resultant NR/NT architecture consists of a highly ordered nanorod top layer that directly adjoins to a highly ordered nanotube array bottom layer. The thickness of the top nanorod layer was 90 nm with average nanorod diameter of 22 nm after 20 min of anodization. The thickness of the bottom nanotube array layer was found to be ca. 250 nm after 20 min of anodization, having an average outer and inner tubular diameters of 120 and 80 nm, respectively. A broad implication of the method is that a simple modification to the substrate surface can lead to new forms of nanostructures. For as-anodized NR/NT samples, XRD analysis reveals that the nanorods are of anatase TiO2 crystalline form while the nanotubes are amorphous. Anatase TiO2 crystalline form of NR/NT film with high crystallinity can be obtained by thermally treating the as-anodized sample at 450 àfor 2 h in air. The resultant NR/NT film was used as a photoanode for photoactivity evaluation. Comparing with a nanotube array photoanode prepared by direct anodization of unmodified titanium foil, the NR/NT photoanode exhibits a unique feature of selective photocatalytic oxidation toward organics, which makes it very attractive to photocatalytic degradation of organic pollutants, sensing, and other applications.en_US
dc.publisherAmerican Chemical Societyen_US
dc.publisher.placeUnited Statesen_US
dc.subject.fieldofresearchSolid State Chemistryen_US
dc.subject.fieldofresearchEnvironmental Sciences not elsewhere classifieden_US
dc.subject.fieldofresearchEnvironmental Technologiesen_US
dc.titleFabrication of Highly Ordered TiO2 Nanorod/Nanotube Adjacent Arrays for Photoelectrochemical Applicationsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.facultyGriffith Sciences, Griffith School of Environmenten_US
gro.rights.copyrightCopyright 2010 American Chemical Society. Self-archiving of the author-manuscript version is not yet supported by this publisher. Please refer to the journal link for access to the definitive, published version or contact the authors for more information.en_AU
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