Journal article
Efficient microwave hydrothermal preparation of nanocrystalline anatase TiO2 colloids
Journal of Materials Chemistry, Vol.12(6), pp.1787-1791
2002
Abstract
Titanium dioxide nanocrystals are an important commercial product used primarily in white pigments and abrasives, however, more recently the anatase form of TiO2 has become a major component in electrochemical and photoelectrochemical devices. An important property of titanium dioxide nanocrystals for electrical applications is the degree of crystallinity. Numerous preparation methods exist for the production of highly crystalline TiO2 particles. The majority of these processes require long reaction times, high pressures and temperatures (450–1400 °C). Recently, hydrothermal treatment of colloidal TiO2 suspensions has been shown to produce quality crystalline products at low temperatures (<250 °C). In this paper we extend this idea utilising a direct microwave heating source. A comparison between convection and microwave hydrothermal treatment of colloidal TiO2 is presented. The resulting highly crystalline TiO2 colloids were characterised using Raman spectroscopy, XRD, TEM, and electron diffraction. The results show that the microwave treatment of colloidal TiO2 gives comparable increases in crystallinity with respect to normal hydrothermal treatments while requiring significantly less time and energy than the hydrothermal convection treatment.
Details
- Title
- Efficient microwave hydrothermal preparation of nanocrystalline anatase TiO2 colloids
- Authors
- Gregory J Wilson (Author) - Queensland University of TechnologyGeoffrey D Will (Corresponding Author) - Queensland University of TechnologyRay L Frost (Author) - Queensland University of TechnologySimon A Montgomery (Author) - Queensland University of Technology
- Publication details
- Journal of Materials Chemistry, Vol.12(6), pp.1787-1791
- Publisher
- Royal Society of Chemistry
- DOI
- 10.1039/b200053a
- ISSN
- 1364-5501
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99737994502621
- Output Type
- Journal article
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- Chemistry, Physical
- Materials Science, Multidisciplinary
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