Direct Z-scheme CdFe_(2)O_(4)/g-C3N4 hybrid photocatalysts for highly efficient ceftiofur sodium photodegradation  

作　　者：Miao-Miao Fang Jun-Xia Shao Xiang-Gang Huang Jin-Yi Wang Wei Chen 

机构地区：[1]School of Pharmaceutical and Materials Engineering,Taizhou University,Taizhou 318000,China

出　　处：《Journal of Materials Science & Technology》2020年第21期133-142,共10页材料科学技术（英文版）

基　　金：financially supported by the Natural Science Foundation of Zhejiang Province(No.LQ19E020001);the Science and Technology Project of Taizhou City(No.1902gy19)。

摘　　要：A direct Z-scheme CdFe_(2)O_(4)/g-C3N4 hybrid systems with different weight ratios of CdFe2O4 nanoparticles were successfully designed and constructed for ceftiofur sodium photodegradation.The as-obtained CdFe_(2)O_(4)/g-C_(3)N_(4) hybrid samples composed of CdFe_(2)O_(4) nanoparticles and g-C3N4 nanosheets were systematically characterized by different techniques including X-ray diffraction,scanning electron microscope,transmission electron microscope,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,UV–vis DRS,chemical oxygen demand,inductively coupled plasma mass spectrometer,photochemical test and electron spin resonance spectrometer technique.The optimal photocatalytic activity for ceftiofur sodium photodegradation was achieved by modulating the weight ration between CdFe_(2)O_(4) nanoparticles and g-C_(3)N_(4) nanosheets.The result from photocatalytic tests indicate that Cd Fe_(2)O_(4)/g-C_(3)N_(4)-2 hybrid sample exhibit highly efficient photocatalytic activity towards ceftiofur sodium removal in comparison with pristine CdFe_(2)O_(4) nanoparticles and pure g-C_(3)N_(4) nanosheets.Meanwhile the excellent photocatalytic stability of CdFe_(2)O_(4)/g-C_(3)N_(4)-2 hybrid sample was also verified during recycling runs towards photocatalytic ceftiofur sodium degradation.The significant enhancement of photocatalytic activity was attributed to the Z-scheme charge separation and transfer based on the construction of tight heterogeneous interface and well-matched band potentials.We expect this research to provide a new insight into the design and preparation of direct Z-scheme hybrid photocatalysts for environmental remediation.

关 键 词：CdFe2O4 g-C3N4 Z-scheme PHOTODEGRADATION 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X787[环境科学与工程—环境工程]