Bi_(4)MoO_(9)/g-C_(3)N_(4)复合材料的合成及光催化性能研究

Synthesis and Visible Light Photocatalytic Performance of Bi_(4)MoO_(9)/g-C_(3)N_(4) Nanocomposite

通过煅烧法合成g-C3N4纳米片并在其表面负载Bi4MoO9纳米粒子(NPs),制备了Bi4MoO9/g-C3N4(BMC)异质结光催化剂.采用TEM、SEM、DRS、PL等方法对BMC样品进行表征.以磺胺二甲基嘧啶(SMT)为目标降解物,考察BMC的光催化性能.结果表明,BMC-50(Bi4MoO9质量分数为50.0%)的光催化活性最高.BMC-50投加量为0.5 g·L-1时,SMT溶液在光照180 min后降解率可达94.0%,是单一Bi4MoO9降解能力的17.7倍.复合材料中Bi4MoO9与g-C3N4间异质结构的构建降低了电子-空穴对的复合,提高了光催化性能.

g-C3N4nanosheets are synthesized by polymerization method and loaded with Bi4MoO9nanoparticles(NPs)on its surface to prepare Bi4MoO9/g-C3N4(BMC)heterostructure catalyst.BMC samples are characterized by TEM,SEM,DRS and PL.The photocatalytic performance of BMC is investigated with sulfadiazine(SMT)as the target degradation material.The results show that the photocatalytic activity of BMC-50(50.0%Bi4MoO9)is the highest.When the concentration of BMC-50 is 0.5 g·L-1,SMT could degrade 94.0%within 180 min,which is 17.7 times of the degradation capacity of Bi4MoO9.The fabrication of the heterostructure between Bi4MoO9and g-C3N4reduces the recombination of electron-hole pairs and enhances the photocatalytic performance.