摘要
采用超声低温煅烧法制备了一种可回收的磁性复合光催化材料g-C_(3)N_(4)/CoFe_(2)O_(4),并通过X射线衍射(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)和紫外-可见漫反射光谱(UV-vis)等对样品进行了表征。以罗丹明B(RhB)为代表性污染物,探究了g-C_(3)N_(4)/CoFe_(2)O_(4)的光催化性能。结果表明:g-C_(3)N_(4)与CoFe_(2)O_(4)复合质量比为3∶1时g-C_(3)N_(4)/CoFe_(2)O_(4)表现出最佳的光催化活性,重复使用5次后对RhB降解率仍能达到92%,表现出良好的使用稳定性。在外部磁场的作用下,可将其进行有效的分离回收。光催化降解机理研究表明,·OH和·O_(2)^(-)是光催化降解RhB的主要活性物种。
A recyclable magnetic composite g-C_(3)N_(4)/CoFe_(2)O_(4) was prepared by ultrasonic coupled with low-temperature calcination process.The g-C_(3)N_(4)/CoFe_(2)O_(4) was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR)and ul-traviolet visible diffuse reflectance spectroscopy(DRS).The photocatalytic activity of the g-C_(3)N_(4)/CoFe_(2)O_(4) was investigated using Rhodamine B(RhB)as the simulated pollutant.The results show that when the mass ratio of g-C_(3)N_(4) to CoFe2O4 is 3∶1,g-C_(3)N_(4)/CoFe_(2)O_(4) exhibits the best photocatalytic ac-tivity.The degradation rate of RhB can still reach 92%after repeated use for 5 times,showing good sta-bility in practical application.The g-C_(3)N_(4)/CoFe_(2)O_(4) can be separated and recovered easily under an ex-ternal magnetic field.Studies on the photocatalytic degradation mechanism showed that·OH and·O_(2)^(-) are the main active species for photocatalytic degradation of RhB.
作者
罗杰
常薇
张立
雷超
李云锋
刘斌
LUO Jie;CHANG Wei;ZHANG Li;LEI Chao;LI Yunfeng;LIU Bin(School of Environmental and Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,China)
出处
《化学工业与工程》
CAS
CSCD
北大核心
2023年第5期1-7,共7页
Chemical Industry and Engineering
基金
国家自然科学基金项目(22008185)
陕西省重点研发计划项目(2021KW-12)
柯桥西纺产学研协同创新项目(19KQZD07)。
