上转光剂Er^(3+)∶YAlO_3复合物的声催化活性研究

The investigation of Sonocatalytic Activity of the Up-conversion Luminescence Agent Er^(3+)∶ YAlO_3 Composite

通过溶胶凝胶的方法制备了上转光剂Er3+∶YAlO3,然后通过超声分散和溶液沸腾的方法合成了Er3+∶YAlO3/TiO2-CdS复合物光催化剂。利用X射线粉末衍射(XRD)和扫描电镜(SEM)技术对Er3+∶YAlO3和Er3+∶YAlO3/TiO2-CdS复合物进行了表征。以酸性红B染料水溶液作为模拟污染物,通过可见声催化降解程度评估Er3+∶YAlO3/TiO2-CdS复合物催化活性,并且比较了Er3+∶YAlO3/TiO2和Er3+∶YAlO3/CdS光催化活性。最后,对Er3+∶YAlO3上转光剂的原理和Er3+∶YAlO3/TiO2-CdS复合物的声催化机理进行了讨论。

The Er3＋∶ YAlO3 as an up-conversion luminescence agent were synthesized by sol-gel and auto-combustion method in our laboratory,and then Er3＋∶ YAlO3/TiO2-CdS composite was a sonocatalyst was 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 Er3＋∶ YAlO3/TiO2-CdS composite.The results showed that the Er3＋∶ YAlO3/TiO2-CdS composite exhibited a significantly high sonocatalytic activity compared with Er3＋∶ YAlO3/TiO2and Er3＋∶ YAlO3/CdS in the degradation of Acid Red B.At last,the experiment also discussed up-conversion luminescence mechanism of Er3＋∶ YAlO3 and excitation principle of Er3＋∶ YAlO3/TiO2-CdS under ultrasonic irradiation.