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Comparison of the photocatalytic behavior of TiO2 coatings elaborated by different thermal spraying processes.
- Source :
- Journal of Thermal Spray Technology; Dec2006, Vol. 15 Issue 4, p576-581, 6p
- Publication Year :
- 2006
-
Abstract
- This paper proposes a comparative study on the microstructure and photocatalytic performances of titanium dioxide coatings elaborated by various thermal spraying methods (plasma spraying in atmospheric conditions, suspension plasma spraying, and high-velocity oxyfuel spraying). Agglomerated spray dried anatase TiO<subscript>2</subscript> powder was used as feedstock material for spraying. Morphology and microstructural characteristics of the coatings were studied mainly by scanning electron microscopy and x-ray diffraction. The photocatalytic behavior of the TiO<subscript>2</subscript>-base surfaces was evaluated from the conversion rate of gaseous nitrogen oxides (NOx). It was found that the crystalline structure depended strongly on the technique of thermal spraying deposition. Moreover, a high amount of anatase was suitable for the photocatalytic degradation of the pollutants. Suspension plasma spraying has allowed retention of the original anatase phase and for very reactive TiO<subscript>2</subscript> surfaces to be obtained for the removal of nitrogen oxides. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10599630
- Volume :
- 15
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Thermal Spray Technology
- Publication Type :
- Academic Journal
- Accession number :
- 49822981
- Full Text :
- https://doi.org/10.1361/105996306X147225