磁性磷酸银催化剂的制备及其光催化性能研究

Facile Preparation of Magnetic Fe_3O_4/Ag_3PO_4 Catalyst and its Photocatalytic Properties

采用沉积沉淀法制备了四氧化三铁负载磷酸银(Ag3PO4/Fe3O4)可见光磁性催化剂,利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)对催化剂的微观形貌进行了表征。用甲基橙的光催化降解评价了不同负载量的Ag3PO4/Fe3O4复合催化剂的光催化性能。结果表明:当Ag3PO4负载量为50%时光降解效果最好,在模拟太阳光下,辐照80 min后的降解率可达到90%以上。

Magnetic Fe3O4 / Ag3PO4 visible-light catalyst was successfuly prepared by deposition-precipitation method.The crystal structure and morphology of catalysts were characterized by scanning electron microscopy（SEM） and transmission electron microscopy（TEM） repectively.The photocatalytic activities of Fe3O4 / Ag3PO4 visible-light catalyst were evaluated by the photodegradation of organic dye methyl orange under full sunlight illumination（100 mW · cm-2,AM 1.5 G）,the primary results showed that the composite photocatalysts had good photocatalytic activity on methyl orange degradation.Decolourizing rate of 10 mg· L-1 methyl orange solution using the composite photocatalysts was up to 90% within 80 min irradiation.