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Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}
Zhang, Haimin1,2; Liu, Porun1,2; Li, Feng3; Liu, Hongwei1,2; Wang, Yun1,2; Zhang, Shanqing1,2; Guo, Mingxing1,2; Cheng, Huiming3; Zhao, Huijun1,2
Corresponding AuthorZhao, Huijun(h.zhao@griffith.edu.au)
2011-05-01
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
ISSN0947-6539
Volume17Issue:21Pages:5949-5957
AbstractAnatase TiO2 microspheres with controlled surface morphologies and exposed crystal facets were directly synthesized on metal titanium foil substrates by means of a facile, one-pot hydrothermal method without use of any templating reagent. The obtained products were characterized using Xray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelecron spectroscopy (XPS), and the focused ion beam (FIB) technique. The sizes of the resultant microspheres ranged from 1.1 to 2.1 mu m. The transformation of anatase TiO2 microspheres with exposed {001} facets surface to nanosheets surface with {101} facets was achieved by simply controlling the hydrothermal reaction time. The anatase TiO2 microspheres with exposed square-shaped plane {001} facets were obtained by controlling the reaction time at 1 h. The prolonged reaction time transforms the anatase TiO2 microspheres with exposed square-shaped plane {001} facets to eroded {001} facets then to a nanosheet surface with exposed {101} facets. With hydrothermal synthesis, the surface morphological structure and crystal facets formation are highly dependent on dissolution/deposition processes, which can be strongly influenced by attributes, such as pH of the reaction media, the total concentration of dissolved and suspended titanium species, and the concentration of fluoride in the reaction solution. The changes of these attributes during the hydrothermal process were therefore measured and used to illustrate the morphology and crystal-facet transformation processes of anatase TiO2 microspheres. The surface morphologies and crystal-facet transformations during hydrothermal processes were found to be governed by the compositional changes of the reaction media, driven by dynamically shifted dissolution/ deposition equilibria. The photocatalytic activities of the photoanodes made of anatase TiO2 microspheres were evaluated. The experimental results demonstrated that the photocatalytic activity of anatase TiO2 microspheres with exposed {001} facets was found to be 1.5 times higher than that of the anatase TiO2 microspheres with exposed {101} facets.
Keywordaggregation anatase facet transformation nanostructures photocatalysis titanium oxide
Funding OrganizationAustralian Research Council
DOI10.1002/chem.201002433
Indexed BySCI
Language英语
Funding ProjectAustralian Research Council
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000291594800023
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:66[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/105009
Collection中国科学院金属研究所
Corresponding AuthorZhao, Huijun
Affiliation1.Griffith Univ, Ctr Clean Environm & Energy, Griffith, Qld 4222, Australia
2.Griffith Univ, Griffith Sch Environm, Griffith, Qld 4222, Australia
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Haimin,Liu, Porun,Li, Feng,et al. Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}[J]. CHEMISTRY-A EUROPEAN JOURNAL,2011,17(21):5949-5957.
APA Zhang, Haimin.,Liu, Porun.,Li, Feng.,Liu, Hongwei.,Wang, Yun.,...&Zhao, Huijun.(2011).Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}.CHEMISTRY-A EUROPEAN JOURNAL,17(21),5949-5957.
MLA Zhang, Haimin,et al."Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}".CHEMISTRY-A EUROPEAN JOURNAL 17.21(2011):5949-5957.
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