摘要
采用水热法和原位光还原法制备一系列Cu_(2)O/Ag/g-C_(3)N_(4)复合材料,采用XRD、IR、PL等对复合材料进行表征,并测试其光催化性能。结果表明,Ag和Cu_(2)O成功负载到g-C_(3)N_(4)表面,且没有破坏g-C_(3)N_(4)的结构;当溶液pH=6时,20 mg 15%-Cu_(2)O/Ag/g-C_(3)N_(4)对四环素降解率为94.3%。·OH、·O_(2)^(-)、h^(+)对Cu_(2)O/Ag/g-C_(3)N_(4)降解四环素起主要作用。光催化性能提升的原因可能是由于Ag和Cu_(2)O的加入形成异质结,增大g-C_(3)N_(4)的比表面积,降低其带隙能,使其在可见光区的吸收增强,抑制光生电子-空穴对的复合,提高了g-C_(3)N_(4)光催化性能。
A series of Cu_(2)O/Ag/g-C_(3)N_(4)complexes were prepared by hydrothermal and in situ photoreduction methods and characterized by XRD,IR,PL.The photocatalysis performance of the complexes was tested.Experimental results show that Ag and Cu_(2)O are loaded onto the surface of g-C_(3)N_(4)without damaging its structure.The degradation conversion of tetracycline was 94.3%when the solution pH=6 and 20 mg 15%-Cu_(2)O/Ag/g-C_(3)N_(4)was used.The·OH,·O_(2)^(-),and h^(+)play major role in degradation of tetracycline over Cu_(2)O/Ag/g-C_(3)N_(4).The improved photocatalytic performance of catalyst may be due to increasing specific surface area of g-C_(3)N_(4)after addition of Ag and Cu_(2)O to form heterojunctions,decreasing of band gap energy resulting in increased absorption range in the visible region,and inhibiting in recombination of photogenerated electron-hole pairs.
作者
林诗音
张宇航
谢继苗
毛娜
Lin Shiyin;Zhang Yuhang;Xie Jimiao;Mao Na(Weinan Normal University,Weinan 714099,Shaanxi,China)
出处
《工业催化》
CAS
2024年第7期43-48,共6页
Industrial Catalysis
基金
陕西省教育厅重点实验室项目(20JS046)
渭南市科技局项目(2021ZDYF-JCYJ-282)
渭南师范学院大学生创新训练计划项目(202310723020,S202310723051)。
