Journal article
Synthesis of Nanocrystalline TiO2 and Reduced Titanium Oxides via Rapid and Exothermic Metathesis Reactions
Chemistry of materials, Vol.18(9), pp.2381-2388
05/02/2006
DOI: 10.1021/cm0528328
Abstract
Nanocrystalline titanium dioxide is conventionally produced by aqueous precipitation reactions, followed by annealing post-treatment, which can also cause structural conversions from the photocatalytically active anatase to rutile phases. Solvent-free exothermic solid-state metathesis (SSM) reactions have shown wide utility in the synthesis of binary solids. This paper describes the application and chemical flexibility of the SSM method for the synthesis of TiO2 from TiCl3 and Na2O2. The use of an insulating crucible and addition of a NaCl heat sink to this rapid and exothermic SSM led to improved product crystallinity and increases in anatase to rutile TiO2 phase content. Small particle size products were synthesized at high salt dilution levels. The photocatalytic activity of SSM synthesized TiO2 powders containing some anatase TiO2 were comparable to a commercial TiO2 standard, even though the SSM powders had 30−50% lower surface areas. By changing the Na2O2 reagent to a more oxygen deficient one, Na2O, reduced titanium phases, primarily Ti2O3, were synthesized along with Na−Ti−O structures.
Details
- Title: Subtitle
- Synthesis of Nanocrystalline TiO2 and Reduced Titanium Oxides via Rapid and Exothermic Metathesis Reactions
- Creators
- Sujith PereraNadiya ZelenskiEdward G Gillan
- Resource Type
- Journal article
- Publication Details
- Chemistry of materials, Vol.18(9), pp.2381-2388
- Publisher
- American Chemical Society
- DOI
- 10.1021/cm0528328
- ISSN
- 0897-4756
- eISSN
- 1520-5002
- Language
- English
- Date published
- 05/02/2006
- Academic Unit
- Chemistry
- Record Identifier
- 9984001245402771
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