title: Sonocatalytic degradation of organic dyes and influence of Al(2)O(3), Y(2)O(3) and Fe(2)O(3) on catalytic activity of TiO(2) under ultrasonic irradiation.
abstract: In order to improve the sonocatalytic activity of TiO(2), Al(2)O(3)/TiO(2), Y(2)O(3)/TiO(2) and Fe(2)O(3)/TiO(2) 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(2)O(3)/TiO(2), Y(2)O(3)/TiO(2) and Fe(2)O(3)/TiO(2), 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(2) < Fe(2)O(3)/TiO(2) < Y(2)O(3)/TiO(2) < Al(2)O(3)/TiO(2). 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.
authors.affiliation: Department of Chemistry, Liaoning University, Shenyang 110036, People's Republic of China.
authors.forename: Xia
authors.initials: X
authors.lastname: Chen
authors.forename: Renzheng
authors.initials: R
authors.lastname: Jiang
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Kai
authors.initials: K
authors.lastname: Li
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.forename: Baoxin
authors.initials: B
authors.lastname: Wang
authors.forename: Jingqun
authors.initials: J
authors.lastname: Gao
authors.forename: Pingli
authors.initials: P
authors.lastname: Kang
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry; D009282:Naphthalenesulfonates / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014465:Ultrasonics; D014874:Water Pollutants, Chemical / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods*; D015019:Yttrium / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D005290:Ferric Compounds; D009282:Naphthalenesulfonates; D014874:Water Pollutants, Chemical; C521611:acid red B; C009495:titanium dioxide; C000499:ferric oxide; D015019:Yttrium; D014025:Titanium; D000537:Aluminum Oxide; C091417:yttria