介孔石墨相氮化碳载银光催化抗菌性能研究

Ag modified m-g-C_3N_4 composite with photocatalytic and antibacteral performance

以氯化铵为气泡模板,三聚氰胺为石墨相氮化碳前驱体,采用光沉积法构筑介孔石墨相氮化碳载银(Ag)(m-g-C_3N_4/Ag)催化剂。并对m-g-C_3N_4/Ag的晶体结构、化学组成和形貌进行表征。考察了Ag含量对m-gC_3N_4/Ag光降解性能和抗菌性能的影响。研究结果表明,制得的m-g-C_3N_4/Ag具有介孔结构,随着催化剂中Ag含量的增多,光降解能力明显提升,Ag浓度为160mg/g的m-g-C_3N_4/Ag对甲基橙(MO)的降解效果最好,在降解35min条件下,最高降解率为82%。m-g-C_3N_4/Ag对铜绿假单胞菌的抗菌效果优于对大肠杆菌的抗菌效果。

The mesoporous g-C3N4/Ag(m-g-C3N4/Ag)composites were obtained by photodeposition method employing ammonium chloride as gaseous bubble template and melamine as g-C3N4 precursor.The crystalline structures,molar structures and morphology were characterized.The effects of silver content on the photocatalytic performance and antibacterial activity of samples were studied.The results showed that the prepared catalysts had mesporous structure.The photocatalytic performances were promoted with the increase of Ag content.M-g-C3N4/Ag with Ag concentration of 160 mg/g had the best degradation effect on MO.Under 35 min degradation,the highest degradation rate was 82%.The antibacterial activity of m-g-C3N4/Ag to P.aeruginosa was more obvious than that to Ec.oli.