Metal cobalt embedded N-doped carbon nanotube catalyst for catalytic ozonation

摘要

? 2022 Elsevier B.V.Through a one-step solid-state pyrolysis reaction, we construct a Co embedded N-doped carbon nanotube (Co@N-CNT) catalyst for catalytic ozonation. The embedded Co and doped N effectively enhance the catalytic activity and stability of carbon nanotubes, and the core–shell structure effectively solves the problem of metal leaching. Experiment results showed that the Co@N-CNT for catalytic ozonation could completely degrade 15 mg L-1 of methylene blue solution in 6 min, and the removal efficiency was about 35 higher than ozonation alone. Results of EPR experiments and quenching tests manifested that both.O2– and 1O2 were dominant ROS contributed to the improvement of degradation efficiency with Co@N-CNT/O3 system.