赤泥基复合催化剂光催化降解罗丹明B的研究

Study on Photocatalytic Degradation of Rhodamine B Using Red Mud Based Composite Catalysts

以赤泥为原料,通过水热法负载g-C_(3)N_(4)或氧化石墨烯分别制备了7%g-C_(3)N_(4)/RM复合光催化剂和7%GO/RM复合光催化剂,采用X射线衍射(XRD)、全自动比表面积及孔隙度分析(BET)和紫外-可见漫反射光谱(UV-Vis DRS)等表征研究了赤泥基复合光催化剂的基础属性和光吸收性能。以光催化降解罗丹明B作为特征测试评价了其光催化性能。结果表明,负载氧化石墨烯的赤泥基复合光催化材料对罗丹明B的降解率达到65.4%。紫外可见吸收光谱结果显示,负载GO的赤泥基光催化材料的吸收范围从570 nm拓宽到了大于800 nm,表明了复合物提高了对可见光的吸收,比负载g-C_(3)N_(4)的催化剂具有更好的催化活性。

7%g-C_(3)N_(4)/RM composite photocatalyst and the 7%GO/RM composite photocatalyst were prepared by loading g-C_(3)N_(4) and graphene on red mud with hydrothermal,respectively.The light absorption performance of the red mud based composite photocatalyst was characterized by X-ray diffraction(XRD),fully automatic surface area and porosity analysis(BET),and UV Vis diffuse reflectance spectroscopy(DRS).The photocatalytic degradation of Rhodamine B was used as a characteristic test to evaluate its photocatalytic performance.The degradation rate of Rhodamine B by red mud based composite catalyst loaded with graphene oxide reached 65.4%.The UV Vis visible absorption spectrum results show that the absorption range of the red mud based catalyst loaded with GO has been expanded from 570 nm to greater than 800 nm,indicating that the composite improves the absorption of visible light.The catalyst loaded with g-C_(3)N_(4) exhibits better catalytic activity.