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-  2017 

磁性Ag_3PO_4/壳聚糖/Fe_3O_4复合催化剂的制备及其可见光催化性能 Preparation of Magnetic Ag_3PO_4/Chitosan/Fe_3O_4 Nanocomposites and Its Visible-Light Photocatalytic Performance

Keywords: 光催化,磷酸银,壳聚糖,磁性材料

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Abstract:

在Fe_3O_4/壳聚糖体系中,利用壳聚糖(CS)分子中未反应的活性位点引入窄带隙半导体Ag_3PO_4制备了磁性Ag_3PO_4/CS/Fe_3O_4复合可见光催化剂,采用SEM,TEM,EDAX,XRD,FT-IR,VSM等技术对其微观形貌、结构和磁性进行表征,并以甲基橙为模式污染物考察了各组分配比、交联剂用量等因素对其可见光催化性能的影响.结果表明,该复合催化剂各组分配比(mFe_3O_4∶mCS∶mAg3PO4)为0.33∶1∶2.5、交联剂戊二醛用量相对于0.1g壳聚糖为0.66g时,在选定实验条件下对甲基橙表现出优于同样质量Ag_3PO_4的光催化脱色能力,且可以利用外加磁场方便地从反应体系中分离回收.受可见光驱动的Ag_3PO_4、吸附剂壳聚糖以及磁性的Fe_3O_4三组分协同作用使复合催化剂具有良好的催化活性、稳定性和分离回收性能

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