Title: | Preparing titanium oxide with various morphologies |
Authors: | Chen, YF Lee, CY Yeng, MY Chiu, HT 應用化學系 Department of Applied Chemistry |
Keywords: | titanium oxide;nanomaterials;nanotubes;microstructure |
Issue Date: | 20-Jul-2003 |
Abstract: | Titanium oxide powder was prepared by hydrolyzing titanium tetraisopropoxide (TTIP) in aqueous solutions at pH 2, using TMC and NP-204 as surfactants. The anatase phase was formed when the precipitants were dried at 373 K. When the calcination temperature was below 773 K, all the powders were crystalline in the anatase phase. The powders changed to the rutile phase when the calcination temperature exceeded 1173 K. The powder calcined at 673 K has spherical primary particles with diameters of approximately 8 nm. When the powders calcined at 673 K were heated in NaOH solutions of various concentrations at 423 K for 20 h, titanium oxide powders with different morphologies were obtained. After the powders were refluxed in 5 M NaOH solutions, flower-like titanium oxide particles were formed. Nanotubes of titanium oxide about 8 run in diameter and over 600 rim long were obtained when the powders were refluxed in 10 M NaOH solution. (C) 2003 Elsevier Science B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/S0254-0584(03)00100-7 http://hdl.handle.net/11536/27705 |
ISSN: | 0254-0584 |
DOI: | 10.1016/S0254-0584(03)00100-7 |
Journal: | MATERIALS CHEMISTRY AND PHYSICS |
Volume: | 81 |
Issue: | 1 |
Begin Page: | 39 |
End Page: | 44 |
Appears in Collections: | Articles |
Files in This Item:
If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.