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Full Paper
Controlled Synthesis of Anatase TiO2 Single Crystals with Dominant {001} Facets from TiO2 Powders
Article first published online: 25 SEP 2012
DOI: 10.1002/cplu.201200158
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Li, H., Zeng, Y., Huang, T., Piao, L. and Liu, M. (2012), Controlled Synthesis of Anatase TiO2 Single Crystals with Dominant {001} Facets from TiO2 Powders. ChemPlusChem, 77: 1017–1021. doi: 10.1002/cplu.201200158
Publication History
- Issue published online: 2 NOV 2012
- Article first published online: 25 SEP 2012
- Manuscript Revised: 21 AUG 2012
- Manuscript Received: 21 JUN 2012
Funded by
- National Basic Research Program of China. Grant Number: 2011CB932802
- Scientific Research Fund of Hunan Provincial Education Department. Grant Number: 09A083
- Ministry of Science and Technology. Grant Numbers: 2011CB932802, 2011BAK15B05, 2011FY130104
- Science and Technology fund of Hunan Provincial Science and Technology Department. Grant Number: 2012FJ4137
Keywords:
- crystal engineering;
- hydrothermal synthesis;
- photocatalysis;
- single crystals;
- titanium dioxide
Abstract
Anatase TiO2 single crystals with dominant {001} facets were fabricated in a controlled manner from TiO2 powders through a facile route for the first time. The obtained TiO2 single crystals have a size of approximately 1.5 μm and a remarkable, roughly 65 % fraction of {001} facets. The influence of the reaction temperature, the amount of precursor, and the reaction time on the morphology and the exposed facets was studied systematically. The percentage of {001} facets increased with the temperature and the amount of precursor, as a result of the surface energy reduction effect of F− ions. Further increasing the temperature and the amount of precursor led to serious corrosion of the products because of the enhanced corrosive effect of HF. Owing to the high percentage of exposed {001} facets, the TiO2 single crystals exhibit a much enhanced photocatalytic efficiency (almost fivefold) compared to that of P25 TiO2 as a benchmark material, thus opening a new avenue to prepare highly active TiO2 single crystals with dominant {001} facets from low-cost TiO2 powders.