Facile synthesis of the direct Z-scheme sulfuretted NiFe-layered double hydroxides/CdS heterojunction for the improved photodegradation of model organic pollutants

Exploiting efficient and reusable photocatalysts is a challenging matter for environmental pollutants re -mediation. Herein, the novel sulfuretted NiFe-layered double hydroxides/CdS (NiFeSx/CdS) Z-scheme pho-tocatalysts were rationally fabricated by in-situ solvothermal methods and the various characterization techniques, such as XRD, FT-IR, TEM, HR-TEM, XPS and UV-Vis DRS, demonstrated that the photocatalysts were successfully synthesized. Moreover, the NiFeSx/CdS100 heterostructure exhibited the optimal tetra-cycline hydrochloride (TC) removal efficiency of 85.77%, which was 3.10 and 2.42 times higher than the NiFeSx and CdS, respectively. In addition, the photodegradation performances of NiFeSx/CdS100 composites towards MB and RhB also reached up to 92.09% and 92.81%, respectively. The exceptional photodegradation activity was ascribed to the higher visible light utilization as well as the fast photo-induced electrons and holes separation efficiency. More importantly, the good configurational stability and recyclability of NiFeSx/ CdS were observed because of its strong synergistic effect, which provides the possibility of photocatalytic degradation of environmental pollutants for a long time. At last, based on the consideration of band position and supervising of active radicals, the legitimate Z-scheme photocatalytic mechanism was proposed. The current work supplies novel insights for exploitation of sustainable solar energy in environmental re -mediation. (c) 2022 Published by Elsevier B.V.

Automated summary

In this study, novel sulfuretted NiFe-layered double hydroxides/CdS photocatalysts were successfully synthesized and exhibited exceptional photodegradation activity. The research provides new insights for the exploitation of sustainable solar energy in environmental remediation.