The investigation of sonocatalytic activity of Er3+:YAlO3/TiO2-ZnO composite in azo dyes degradation.
In this work, the emphasis was mainly placed on investigating the sonocatalytic activity of TiO(2)-ZnO mixed with Er(3+):YAlO(3), namely, Er(3+):YAlO(3)/TiO(2)-ZnO composite. It is able to utilize the sonoluminescence light to improve the sonocatalytic degradation of organic dyes. The Er(3+):YAlO(3) as up-conversion luminescence agent was synthesized by sol-gel and auto-combustion method, and then Er(3+):YAlO(3)/TiO(2)-ZnO composite as sonocatalyst were prepared by ultrasonic dispersion and liquids boil method. The prepared up-conversion luminescence agent and composites were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Acid Red B dye was selected to examine the sonocatalytic activity of Er(3+):YAlO(3)/TiO(2)-ZnO composite. The degradation reaction processes were monitored by UV-vis spectrophotometer and ion chromatogram. The influences on the activity of the Er(3+):YAlO(3)/TiO(2)-ZnO such as Ti/Zn molar ratio, heat-treated temperature and heat-treated time were studied. The results showed that the Er(3+):YAlO(3)/TiO(2)-ZnO composite exhibited a significantly high sonocatalytic activity compared with other catalysts in the degradation of Acid Red B. And the sonocatalyst with 1:1 Ti/Zn molar ratio heat-treated at 550°C for 60min showed the highest sonocatalytic activity. At last, the experiment also indicated that it has a good sonocatalytic activity to degrade other organic dyes.
Gao
Jingqun
J
Department of Chemistry, Liaoning University, Shenyang, PR China.
Jiang
Renzheng
R
Wang
Jun
J
Kang
Pingli
P
Wang
Baoxin
B
Li
Ying
Y
Li
Kai
K
Zhang
Xiangdong
X
D017607:Aluminum Compounds / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry*; D006358:Hot Temperature; D007700:Kinetics; D008163:Luminescent Measurements; D008855:Microscopy, Electron, Scanning; D009282:Naphthalenesulfonates / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*; D014465:Ultrasonics; D014961:X-Ray Diffraction; D015019:Yttrium / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
D017607:Aluminum Compounds; D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; C521611:acid red B; C009495:titanium dioxide; D015019:Yttrium; D004871:Erbium; D014025:Titanium; D015034:Zinc Oxide