以十二烷基苯磺酸钠为模型反应物的Y2O3/TiO2复合催化剂的制备及光降解催化性能

采用浸渍法制备了Y₂O₃/TiO₂复合氧化物催化剂,并用紫外可见光谱、SEM、BET等手段对其进行了表征.以水相十二烷基苯磺酸钠(DBS)溶液的光催化降解反应为实验模型,考察了TiO₂掺杂Y₂O₃后的光催化氧化活性,并探讨了Y₂O₃掺杂量、吸附性、焙烧温度及时间对Y₂O₃/TiO₂复合氧化物催化剂光催化活性的影响.实验结果表明:复合氧化物催化剂Y₂O₃/TiO₂存在某一最佳组分比值,当两者重量比为1:200时,其催化活性是同样条件下前体催化剂TiO₂的2.4倍.

PREPARATION AND PHOTOCATALYTIC PERFORMANCE OF Y2O3/TiO2 CONDUCTED WITH THE DEGRADATION OF SODIUM DODECYLBENZENE SULPHONATE

Y 2O 3/TiO 2 catalysts were prepared by impregnation method and characterized by means of UV,SEM,and BET.Being a model reaction,the photocatalytic degradation of DBS solution was investigated in TiO 2 and Y 2O 3/TiO 2 powder suspensions and irradiated by high pressure mercury lamp.Photocatalytic degradation efficiency of different catalysts were evaluated by the apparent first-order kinetic constant and the decomposition rate of DBS.The effects of preparation conditions,the mass ratio and adsorption of Y 2O 3/TiO 2 ,calcination conditions and special surface area on composite photocatalyst photoactivity were also investigated.Results show that there exists a best ratio value between Y 2O 3 and TiO 2,while the mass ratio of composite catalyst is 1 to 200,the photocatalytic activity of Y 2O 3/TiO 2 catalyst is 2.4 times as that of TiO 2.