Bimetallic and Magnetic CoFe-/Nitrogen-Doped Carbon Nanocomposites as Catalysts for the Degradation of Rhodamine B

High Resolution Image Download MS PowerPoint Slide Developing M/N-doped carbon (M = Fe, Co) with porous frameworks is an efficient approach for creating high-performance catalysts for the advanced oxidation process (AOP). In this work, a nitrogen-doped porous carbon-supported Co-Fe-NC catalyst was developed using a metal–organic framework, followed by a one-step pyrolysis of bimetallic ZIF-9 (Co-Fe) at 700 °C. It was carefully studied to see how well the synthesized Co-Fe-NC worked as a catalyst for activating PMS to degrade Rhodamine B (RhB). The Co-Fe-NC (4:2) catalysts with a Co/Fe molar ratio of 4/2 had the greatest catalytic efficacy in the degradation of RhB. The highest RhB degradation efficiency of 100% and a pseudo-second-order kinetic constant of 1.414 min –1 were attained after 6 min at 25 °C. Furthermore, Co-Fe-NC (4:2) showed excellent recyclability and stability, with a specific surface area of 129.1 m 2 /g. Results indicated that SO 4 · –, 1 O 2, and · OH were produced during PMS activation, with 1 O 2 being the primary radical responsible for RhB degradation. In addition, Co(II), Fe(III), and coordinated nitrogen, especially pyridinic and graphitic nitrogen groups, played a vital role in activating PMS. Spectral analysis also provided insights into potential pathways of RhB degradation. All of these results showed that Co-Fe-NC (4:2) has a lot of potential as a PMS activator for use in pollutant degradation.