Facile synthesis of CoMn2O4 spinel catalyst as peroxymonosulfate activator for efficient rhodamine B degradation

CoMn2O4 spinel catalyst was successfully fabricated by facile solvent-free molten method and utilized as peroxymonosulfate activator for rhodamine B (RhB) degradation. The as-prepared CoMn2O4 appeared nano-cluster with porous structure and abundant lattice oxygen amount. The catalytic activity of CoMn2O4 for RhB degradation was investigated under different conditions. The superior catalytic activity was further confirmed by quenching experiment and electron paramagnetic resonance (EPR), which was concluded that 1O2 was the main active species during RhB degradation process.