Y2O3-Bi2O3可见光催化降解甲基橙

摘要

采用固相合成法制备了Y<,2>O<,3>-Bi<,2>O<,3>复合可见光催化剂,用XRD、DRS对复合催化剂进行了表征.以甲基橙为模拟废水,在日光色镝灯光照下,研究了废水浓度、催化剂投加量、温度、pH等对Y<,2>O<,3>-Bi<,2>O<,3>光催化活性的影响.实验结果表明:在甲基橙质量浓度为20 mg/L、Y<,2>O<,3>-Bi<,2>O<,3>催化剂投加质量浓度为8 g/L、pH=1、光照时间为1h的条件下,甲基橙降解率最大,可达到84.30%,比不加入催化剂提高了83.9%.%Y2O3-Bi2O3 complex visible light catalyst has been prepared by solid-phase synthesis process and charaeterized with XRD and DRS. Methyl orange is used as simulated wastewater. The effects of wastewater concentration, catalyst dosage,temperature and pH on the activity of visible light catalyst are studied. The experimental results show that when the concentration of methyl orange is 20 mg/L,Y2Oa-Bi203 dosage 8 g/L,pH=l and light application time 1 h, the highest degradation rate of methyl orange can reach 84.30％. It is 83.9％ higher than that without adding catalyst.