Ag3PO4/GO光催化剂的制备及性能研究

Fabrication and Photocatalytic Properties of Ag3PO4/GO Photocatalyst

以氧化石墨烯(GO)为基底,利用离子交换法制备了球形和立方体表面结构的Ag3PO4/GO复合光催化剂.通过X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见光谱(UV-Vis DRS)对样品进行了表征.罗丹明B的光催化降解实验结果表明:Ag3PO4/GO复合光催化剂在100 min内对20 mg/L罗丹明B的去除率可达98.5%,明显高于球形Ag3PO4(83.8%)及立方形Ag3PO4(88.1%).另外,Ag3PO4/GO复合材料在光催化降解重复性实验中表现出良好的稳定性,循环5次后对罗丹明B的去除率仍可达95%以上.

Ag 3PO 4/GO photocatalysts with spherical and cubic surface structures were synthesized via ion exchange method using graphene oxide(GO)as a carrier.The properties of Ag 3PO 4/GO catalysts were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS).The capability of the catalysts was evaluated by rhodamine B(RhB)degradation experiments.The results showed that under the same conditions,98.5%of RhB was removed by cubic Ag 3PO 4/GO in 100 min,which was significantly higher than that of pure spherical Ag 3PO 4(83.8%),cubic Ag 3PO 4(88.1%).Moreover,the cubic Ag 3PO 4/GO catalysts exhibited perfect stability in photocatalytic degradation,and the removal rate of rhodamine B could still reach more than 95%after five reaction cycles.