Large aspect ratio titanate nanowire prepared by monodispersed titania submicron sphere via simple wet-chemical reactions

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.12.033· OSTI ID:21015743

Yong, Shi ^[1]; Dongfeng, Xue ^[1]

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1. State Key Laboratory of Fine Chemicals, Department of Materials Science and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012 (China)

A facile one-step hydrothermal reaction among monodispersed titania submicron spheres and KOH solution was found to result in potassium titanate nanowires with a large aspect ratio. The diameter of these nanowires falls in the range of 50-200 nm and the length ranges from several micrometers to several tens of micrometers. It is found that the reaction temperature, duration, titanium source and the size distribution of titania raw powders have a great impact on the resultant morphology. Monodispersed TiO{sub 2} submicron sphere is beneficail for the formation and growth of large-area lamellar potassium titanate and consequently it is in favor of the production of nanowires with a large aspect ratio. The nanowires were analyzed by a range of methods including powder X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), energy-dispersive X-ray spectrometer (EDX) and UV/Vis spectrophotometer. UV-absorption study showed that these nanowires are wide-band semiconductors with a band gap 3.4 eV. A formation mechanism is proposed on the basis of the dissolving, growth, thickening and splitting of K{sub 2}Ti{sub 6}O{sub 13} nanointermediates. - Graphical abstract: Monodispersed raw titania powders are beneficial to get the long and uniform K{sub 2}Ti{sub 6}O{sub 13} nanowires with a large aspect ratio. A formation mechanism of nanowires is proposed based on the dissolving, growth, thickening and splitting of K{sub 2}Ti{sub 6}O{sub 13} nanointermediates.

• OSTI ID: 21015743
• Journal Information: Journal of Solid State Chemistry, Vol. 180, Issue 3; Other Information: DOI: 10.1016/j.jssc.2006.12.033; PII: S0022-4596(07)00013-8; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION
ASPECT RATIO
CHEMICAL REACTIONS
ELECTRON DIFFRACTION
EV RANGE 01-10
MORPHOLOGY
POTASSIUM HYDROXIDES
QUANTUM WIRES
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SPECTROPHOTOMETERS
TITANATES
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROMETERS