Octahedron of Zero-Valent and Mono-Valent Copper Anchored on Nitrogen Doping Porous Carbon to Enhance Heterogeneous Electro-Fenton Like Activity

The development of integrated porous carbon materials based on transition metal oxides for used as catalysts with high efficiency and robust advantages in heterogeneous electro-Fenton like (EF-like) reaction were supposed to be widely used in effectual removing refractory sewage. Herein, an octahedral composite material of Cu+/Cu0 anchored on nitrogen doping porous carbon (Cu+/Cu0-C-800) was designed. The regulated Cu+/Cu0-NC-800 catalyst was efficient for the catalytic oxidation of ciprofloxacin via heterogeneous EF-like reaction, and the degradation efficiency was almost 100% in 120 min with outstanding cyclic stability. Compared to irregular Cu+/Cu0-C-800, the regular octahedral structure of Cu+/Cu0-NC-800 catalyst was beneficial to exposing more active sites. The excellent redox and electronic transmission capability benefited from the synergistic effect of doped nitrogen and polyvalent copper. What’s more, with the assistance of nitrogen doping sites and polyvalent copper (Cu0, Cu+ and Cu2+) redox reaction, the directional decomposition of H2O2 into hydroxide radical and superoxide radical was realized, consequently boosting the performance in heterogeneous EF-like reaction. Our discovery greatly advanced the practical application value in wastewater treatment