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

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.O-2(-) and O-1(2) were dominant ROS contributed to the improvement of degradation efficiency with Co@N-CNT/O-3 system.

Automated summary

The study successfully constructed a Co@N-CNT catalyst through one-step solid-state pyrolysis reaction, which showed excellent performance in catalytic ozonation reaction by effectively degrading organic dyes with a removal efficiency about 35% higher compared to ozonation alone. EPR experiments and quenching tests indicated that both .O-2(-) and O-1(2) were dominant ROS contributing to the improved degradation efficiency in the Co@N-CNT/O-3 system.