A direct Z-scheme CdFe₂O₄/g-C₃N₄ hybrid systems with different weight ratios of CdFe₂O₄ nanoparticles were successfully designed and constructed for ceftiofur sodium photodegradation. The as-obtained CdFe₂O₄/g-C₃N₄ hybrid samples composed of CdFe₂O₄ 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 CdFe₂O₄ nanoparticles and g-C₃N₄ nanosheets. The result from photocatalytic tests indicate that CdFe₂O₄/g-C₃N₄-2 hybrid sample exhibit highly efficient photocatalytic activity towards ceftiofur sodium removal in comparison with pristine CdFe₂O₄ nanoparticles and pure g-C₃N₄ nanosheets. Meanwhile the excellent photocatalytic stability of CdFe₂O₄/g-C₃N₄-2 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.

成功设计并构建了具有不同重量比的CdFe ₂ O ₄纳米粒子的直接Z方案CdFe ₂ O ₄ / gC ₃ N ₄杂化体系，用于头孢噻呋钠的光降解。由CdFe ₂ O ₄纳米颗粒和gC ₃ N ₄组成的CdFe ₂ O ₄ / gC ₃ N ₄杂化样品纳米片通过不同的技术进行系统地表征，包括X射线衍射，扫描电子显微镜，透射电子显微镜，傅里叶变换红外光谱，X射线光电子能谱，UV-vis DRS，化学需氧量，电感耦合等离子体质谱仪，光化学测试和电子自旋共振光谱仪技术。通过调节CdFe ₂ O ₄纳米颗粒和gC ₃ N ₄纳米片之间的重量比，实现了头孢噻呋钠光降解的最佳光催化活性。光催化试验的结果表明，CdFe ₂ O ₄ / gC ₃ N ₄与原始CdFe ₂ O ₄纳米颗粒和纯gC ₃ N ₄纳米片相比，-2混合样品对去除头孢噻呋钠具有很高的光催化活性。同时，CdFe ₂ O ₄ / gC ₃ N ₄具有优异的光催化稳定性。在回收过程中也验证了-2杂种样品对光催化头孢噻呋钠的降解作用。光催化活性的显着提高归因于基于紧密异质界面的构建和良好匹配的带电势的Z方案电荷的分离和转移。我们希望这项研究能够为设计和制备用于环境修复的直接Z方案杂化光催化剂提供新的见解。