g-C_3N_4/RGO/AgI复合光催化剂的制备及性能研究

Preparation and Properties of g-C_3N_4/RGO/AgI Composite Photocatalyst

采用热聚合法制备石墨相氮化碳(g-C_3N_4),超声法制备还原氧化石墨烯/石墨相氮化碳(RGO/g-C_3N_4)二元复合光催化剂,再利用共沉淀法在二元复合光催化剂RGO/g-C_3N_4表面负载AgI,制得g-C_3N_4/RGO/AgI复合光催化剂。运用XRD、SEM、FT-IR、UV-Vis和FTIR等手段对材料进行表征,以罗丹明B(Rh B)作为目标物,用g-C_3N_4/RGO/AgI进行光催化降解实验。结果表明:光照210min后,g-C_3N_4/RGO/AgI光催化剂对Rh B的降解率为96. 52%。相同条件下,RGO/g-C_3N_4和gC_3N_4/AgI对RhB的降解率分别为58. 28%和73. 80%。g-C_3N_4/RGO/AgI复合光催化剂具有优异的光催化性能。

The graphite phase carbonitride (g-C3N4) is prepared by thermal polymerization,and the reduced graphene oxide/graphite phase carbon nitride (RGO/g-C3N4) binary composite photocatalyst is prepared by ultrasonic method.A g-C3N4/RGO/AgI composite photocatalyst is prepared by supporting AgI on the surface of RGO/g-C3N4 by coprecipitation.The resulting products are characterized by means of XRD,SEM,FTIR,and UV-Vis.The photocatalytic degradation experiment of g-C3N4/RGO/AgI is carried out with Rhodamine B (RhB) as the target.The results show that the degradation rate of RhB by g-C3N4/RGO/AgI photocatalyst is 96.52% after 210 min.Under the same conditions,the degradation rates of RhB by RGO /g-C3N4 and g-C3N4/AgI are 58.28% and 73.80%,respectively.The g-C3N4/RGO/AgI composite photocatalyst has excellent photocatalytic performance.