Journal
MATERIALS LETTERS
Volume 64, Issue 24, Pages 2688-2691Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2010.09.006
Keywords
Titania; Anatase; Hollow spheres; Electron microscopy
Funding
- National Natural Science Foundations of China [SFC-20671042, NSFC-50872045]
- National Natural Science Foundations of Guangdong [GDSF-05200555, GDSF-7005918]
- National Natural Union Foundation of China and Guangdong Province [U-0734005]
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Hierarchical TiO2 hollow spheres had been prepared based on bubble templates by a simple one-step hydrothermal method. The diameter of hollow spheres was about 700 nm and the shell thickness of them was 69 nm. They were composed of similar spindle- or needle-like building units. Furthermore, hydrothermal time had an important influence on the morphology and crystallinity of hollow spheres. Moreover, the UV-Vis diffuse reflectance spectra of TiO2 hollow spheres heated at 150 degrees C for 10 h showed the strongest absorption in the UV-Vis region and the Raman spectrum demonstrated the anatase sample. Additionally, a possible formation mechanism of TiO2 hollow spheres was proposed. So this novel and simple method would provide a development direction to fabricate all kinds of inorganic hollow spheres by one-step procedure. (C) 2010 Elsevier B.V. All rights reserved.
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