Improving the adsorption capacity of tetracycline and O3 on partially reduced Cu-MnCO3-Mn3O4/C with abundant oxygen vacancy for highly efficient oxidation-mineralization

Herein, we report the rational design of Cu-MnCO 3 -Mn 3 O 4 /C by partially reduced CuMn/C-300 (300 represents the calcination temperature) for highly efficient mineralization of TC. Mechanism studies indicate that Cu-MnCO 3 -Mn 3 O 4 /C with abundant oxygen vacancies could be enhance the adsorption capacity of TC and O 3 as comparing with CuMn/C-300. Moreover, the degradation and mineralization rates of TC can be enhanced over Cu-MnCO 3 -Mn 3 O 4 /C due to the existence of synergetic catalysis between Cu, MnCO 3 , and Mn 3 O 4 . Combining catalytic ozonation with Fenton-like reaction (by-reaction) could enhance O 3 decomposition and •OH generation, facilitating the degradation and mineralization rates of TC. As expected, Cu-MnCO 3 -Mn 3 O 4 /C exhibits an excellent catalytic ozonation performance for degradation of TC with a k = 0.265 min −1 and almost 100 % of mineralization rate, outperforming to the most of non-noble-based catalysts ever reported. This work presents a combined reaction mechanism for catalytic ozonation to eliminate pollutant through a catalyst with heterogeneous interface in water purification.