One-Step Microemulsion-Mediated Hydrothermal Synthesis of Nanocrystalline TiO<sub>2</sub>
- 1 School of Chemistry Science & Technology, Institute of Physical Chemistry, and Development Center for New Materials Engineering & Technology in Universities of Guangdong, Zhanjiang Normal University, Zhanjiang,China
- 2 School of Chemistry Science & Technology, Institute of Physical Chemistry, and Development Center for New Materials Engineering & Technology in Universities of Guangdong, Zhanjiang Normal University, Zhanjiang,China
- 3 School of Chemistry Science & Technology, Institute of Physical Chemistry, and Development Center for New Materials Engineering & Technology in Universities of Guangdong, Zhanjiang Normal University, Zhanjiang,China
- 4 School of Chemistry Science & Technology, Institute of Physical Chemistry, and Development Center for New Materials Engineering & Technology in Universities of Guangdong, Zhanjiang Normal University, Zhanjiang, China
- 5 School of Chemistry Science & Technology, Institute of Physical Chemistry, and Development Center for New Materials Engineering & Technology in Universities of Guangdong, Zhanjiang Normal University, Zhanjiang, China
- 6 School of Chemistry Science & Technology, Institute of Physical Chemistry, and Development Center for New Materials Engineering & Technology in Universities of Guangdong, Zhanjiang Normal University, Zhanjiang, China
Abstract
Nanocrystalline TiO2 powders with high photocatalytic activity were prepared by one-step microemulsion-mediated hydrothermal method using tetrabutylorthotitanate (TiO(C 4 H 9 ) 4 , TBOT) as precursor. The as-prepared TiO 2 powders were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and the Brunauer-Emmett-Teller (BET) specific surface area measurements. The effects of the oil/water ratio and hydrothermal temperature on the microstructures and photocatalytic activity of the TiO 2 powders were investigated. The results suggest that increasing the oil/water emulsion ratio significantly decreased the particle size of the as-prepared TiO 2 powders and improved the photocatalytic activity. With hydrothermal temperature increasing, the average crystallite size increased and the photocatalytic activities of TiO 2 powders decreased.
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