Ag/g-C_(3)N_(4)/硅藻土三元复合光催化剂制备及光催化降解甲醛研究

Preparation of Ag/g-C_(3)N_(4)/diatomite ternary composite photocatalyst and its photocatalytic degradation of formaldehyde

以多孔硅藻土作为基底,在其上负载石墨相g-C_(3)N_(4)纳米片和Ag纳米颗粒,构筑Ag/g-C_(3)N_(4)/硅藻土三元复合光催化剂.利用SEM,XRD等技术对催化剂的晶相、形貌等进行表征.光催化降解甲醛性能研究表明,在可见光照射下,三元复合物在60 min可降解40%甲醛污染物,明显高于单体g-C_(3)N_(4)和硅藻土,并进一步阐明光催化降解机理.

In this study,Ag/g-C_(3)N_(4)/diatomite ternary composite photocatalyst was constructed by loading graphite phase g-C_(3)N_(4)nanosheets and Ag nanoparticles on porous diatomite.The crystal phase and morphology of the catalyst were characterized by SEM and XRD.The study on the photocatalytic degradation of formaldehyde showed that the ternary complex could degrade 40%formaldehyde pollutants in 60 min under visible light irradiation,which was significantly higher than that of monomer g-C_(3)N_(4) and diatomite.The photocatalytic degradation mechanism was further clarified.