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157453 
Journal Article 
Sonocatalytic degradation of some dyestuffs and comparison of catalytic activities of nano-sized TiO(2), nano-sized ZnO and composite TiO(2)/ZnO powders under ultrasonic irradiation 
Wang, J; Jiang, Z; Zhang, L; Kang, P; Xie, Y; Lv, Y; Xu, R; Zhang, X 
2009 
1 
Ultrasonics Sonochemistry
ISSN: 1350-4177
EISSN: 1873-2828 
16 
225-231 
Here, a novel sonocatalyst, composite TiO(2)/ZnO powder, was prepared through the combination of nano-sized TiO(2) and ZnO powders. Because of the appropriate adsorbability to organic pollutants and special crystal interphase between TiO(2) and ZnO particles, the composite TiO(2)/ZnO powder exhibits a high sonocatalytic activity under ultrasonic irradiation during the degradation of acid red B. Especially, the sonocatalytic activity of composite TiO(2)/ZnO powder with 4:1 molar proportion treated at 500 degrees C for 50min showed obvious improvement compared with pure nano-sized TiO(2) and ZnO powders. When the experimental conditions such as 10mg/L acid red B concentration, 1.0g/L catalyst addition amount, pH=7.0, 20 degrees C system temperature, 100min ultrasonic time and 50mL total volume were adopted, the satisfactory degradation ratio and rate were obtained. All experiments indicate that the sonocatalytic method using composite TiO(2)/ZnO powder may be a more advisable choice for the treatments of non- or low-transparent organic wastewaters in future.