g-C_3N_4的制备及可见光催化性能研究

Preparation of g-C_3N_4 and photocatalytic performance under visible light irradiation

将尿素和三聚氰胺的混合物置于马弗炉煅烧,制得了产率较高的g-C3N4。用XRD、TEM、BET、FT-IR、UV-Vis、PL、TG-DSC等对样品进行了表征,以亚甲基蓝为目标化合物,LED灯为光源,评价了其可见光催化活性。结果表明,当煅烧温度为520℃,尿素含量为60%后,制备的g-C3N4呈片状结构,比表面积达到40.63m2/g,在12 W的LED灯照射下2h对15mg/L的亚甲基蓝降解率达到91.1%。

Make the urea and melamine with the mass ratio of 6∶4mixed,and then take in the muffle tocalcine,received the g-C3N4.The structure of g-C3N4 were analyzed by XRD,TEM,BET,FT-IR,UV-Vis,PL.The results shows,when the calcination temperature was 520℃,the urea content reaches 60%,the g-C3N4 be exist with the layer structure,and the surface areas was 40.63 m2/g.Be accompanied the illuminate of LED with12 W,after 2hthe MB with 15mg/L were degraded 91.1% by the sample.