BiOCl/AgCl复合材料可见光光催化活性和稳定性研究

Visible Light Photocatalytic Activity and Stability of BiOCl/AgCl Composites

采用化学共沉淀法合成BiOCl/AgCl复合催化剂,利用XRD、SEM、XPS、ICP、DRS、EIS等表征对所制备的样品进行了分析,通过在可见光下降解甲基橙(MO)来评价催化剂的催化活性和稳定性,结果表明与纯AgCl相比,BiOCl/AgCl复合催化剂具有较好的光催化活性和稳定性,这是因为BiOCl的复合既能加速电子的转移,提高光生电子-空穴对的分离率,又能够有效地抑制AgCl在光催化反应过程中的溶解。

BiOCl/AgCl composite photocatalyst was successfully prepared by chemical co-precipitation method.The as-prepared samples were analyzed by XRD,SEM,XPS,DRS and so on.The photocatalytic activity and stability of the obtained materials were evaluated by degradation of methyl orange(MO)under visible light.The results show that the BiOCl/AgCl composite photocatalyst show the highest photocatalytic activity and stability than pure AgCl,which are attributed to enhance the quick electrons transfer and effective separation of photo-generated electron pairs and reduce the silver dissolution during the photocatalytic reaction process after composite BiOCl.