Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}

doi:10.1002/chem.201002433

IMR OpenIR

	Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}
	Zhang, Haimin 1,2; Liu, Porun 1,2; Li, Feng 3; Liu, Hongwei 1,2; Wang, Yun 1,2; Zhang, Shanqing 1,2; Guo, Mingxing 1,2; Cheng, Huiming 3; Zhao, Huijun 1,2
通讯作者	Zhao, Huijun(h.zhao@griffith.edu.au)
	2011-05-01
发表期刊	CHEMISTRY-A EUROPEAN JOURNAL
ISSN	0947-6539
卷号	17 期号:21 页码:5949-5957
摘要	Anatase 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.
关键词	aggregation anatase facet transformation nanostructures photocatalysis titanium oxide
资助者	Australian Research Council
DOI	10.1002/chem.201002433
收录类别	SCI
语种	英语
资助项目	Australian Research Council
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000291594800023
出版者	WILEY-BLACKWELL
引用统计	被引频次：70[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/105009
专题	中国科学院金属研究所
通讯作者	Zhao, Huijun
作者单位	1.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
推荐引用方式 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.