Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}

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	Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}
	H. M. Zhang ; P. R. Liu ; F. Li ; H. W. Liu ; Y. Wang ; S. Q. Zhang ; M. X. Guo ; H. M. Cheng ; H. J. Zhao
刊名	Chemistry-a European Journal
	2011
卷号	17 期号:21 页码:5949-5957
关键词	aggregation anatase facet transformation nanostructures photocatalysis titanium oxide sensitized solar-cells photocatalytic activity film electrodes high percentage visible-light titania nanosheets spheres nanocrystals templates
ISSN号	0947-6539
中文摘要	Anatase TiO(2) 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 TiO(2) microspheres with exposed {001} facets surface to nanosheets surface with {101} facets was achieved by simply controlling the hydrothermal reaction time. The anatase TiO(2) 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 TiO(2) 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 TiO(2) 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 TiO(2) microspheres were evaluated. The experimental results demonstrated that the photocatalytic activity of anatase TiO(2) microspheres with exposed {001} facets was found to be 1.5 times higher than that of the anatase TiO(2) microspheres with exposed {101} facets.
原文出处	://WOS:000291594800023
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/30877]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	H. M. Zhang,P. R. Liu,F. Li,et al. Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}[J]. Chemistry-a European Journal,2011,17(21):5949-5957.
APA	H. M. Zhang.,P. R. Liu.,F. Li.,H. W. Liu.,Y. Wang.,...&H. J. Zhao.(2011).Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}.Chemistry-a European Journal,17(21),5949-5957.
MLA	H. M. Zhang,et al."Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}".Chemistry-a European Journal 17.21(2011):5949-5957.