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Sonocatalytic degradation of organic dyes and influence of Al2O3, Y2O3 and Fe2O3 on catalytic activity of TiO2 under ultrasonic irradiation.
- Source :
- Water Science & Technology; 2011, Vol. 63 Issue 7, p1513-1518, 6p
- Publication Year :
- 2011
-
Abstract
- In order to improve the sonocatalytic activity of TiO<subscript>2</subscript>, Al<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript>, Y<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript> and Fe<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript> composites were prepared using mechanical mixing, liquid boiling, ultrasonic dispersion and heat-treated methods. And then, a series of degradation experiments were carried out under ultrasonic irradiation. Also, the influences of heat-treated temperature and heat-treated time on the sonocatalytic activity of Al<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript>, Y<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript> and Fe<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript>, and ultrasonic irradiation time and solution acidity on the sonocatalytic degradation of Acid red B were investigated by UV-vis spectra. It was found that the degradation ratio showed significant increase in the order TiO<subscript>2 </subscript>< Fe2O<subscript>3</subscript>/TiO<subscript>2</subscript> < Y<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript> < Al<subscript>2</subscript>O<subscript>3</subscript>/TiO<subscript>2</subscript>. And the corresponding percentage degradations are about 37, 45, 52 and 81%, respectively. In addition, for exploring the universality, the degradation of other several organic dyes was also reviewed under the same conditions. Because of good degradation efficiency, this method may be an advisable choice for the treatment of non- or low-transparent wastewaters in the future. [ABSTRACT FROM AUTHOR]
- Subjects :
- LIQUID iron
ORGANIC dyes
SOIL degradation
ORGANIC compounds
Subjects
Details
- Language :
- English
- ISSN :
- 02731223
- Volume :
- 63
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Water Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 60715306
- Full Text :
- https://doi.org/10.2166/wst.2011.407