论文部分内容阅读
采用经硫酸处理过的三聚氰胺热解制备g-C_3N_4,利用光照还原在其表面负载Ag颗粒,再通过原位沉积法沉积上AgCl和TiO_2,制得g-C_3N_4/Ag/AgCl/TiO_2复合催化剂。既而采用XRD、TEM、FT-IR、UV-Vis-DRS和PL等分析手段对材料进行表征。并用10mg催化剂、50mL 15mg/L甲基橙溶液作为反应体系进行光催化实验。光照80min后,g-C_3N_4/Ag/AgCl/TiO_2光催化剂对甲基橙的降解率为99.35%。相同条件下,g-C_3N_4、g-C_3N_4/Ag和g-C_3N_4/TiO_2催化剂对甲基橙的降解率分别为34.29%、45.33%和55.84%。该结果表明,复合材料g-C_3N_4/Ag/AgCl/TiO_2具有优异的光催化性能。优异的光催化性能得益于材料中g-C_3N_4、Ag、AgCl和TiO_24种组分间的协同作用。
G-C_3N_4 pyrolyzed by sulfuric acid was used to prepare g-C_3N_4, Ag particles were loaded on its surface by photoluminescence reduction, and AgCl and TiO_2 were deposited by in-situ deposition method to prepare g-C_3N_4 / Ag / AgCl / TiO_2 composite catalysts. Then, the materials were characterized by XRD, TEM, FT-IR, UV-Vis-DRS and PL. And 10mg catalyst, 50mL 15mg / L methyl orange solution as the reaction system for photocatalytic experiments. After 80min illumination, the degradation rate of methyl orange by g-C_3N_4 / Ag / AgCl / TiO_2 photocatalyst was 99.35%. Under the same conditions, the degradation rates of methyl orange by g-C 3 N 4, g-C 3 N 4 / Ag and g-C 3 N 4 / TiO 2 catalysts were 34.29%, 45.33% and 55.84%, respectively. The results show that the composite g-C_3N_4 / Ag / AgCl / TiO_2 has excellent photocatalytic properties. Excellent photocatalytic performance due to the material g-C_3N_4, Ag, AgCl and TiO_24 synergy between components.