Covalent organic polymer derived carbon nanocapsule–supported cobalt as a catalyst for activating monopersulfate to degrade salicylic acid

As salicylic acid (SAC) is an extensively used pharmaceutical, discharge of SAC into the environment has caused serious threats to ecology in view its toxicity. Therefore, SO4•−-involved chemical oxidation methods have been employed for eliminating SAC. Since monopersulfate (MPS) become a popular reagent producing SO4•−, alternative heterogeneous Co-based catalyst proposed by using Co-coordinated covalent organic polymers (Co-COP) as precursor. Via carbonization, Co-COP transferred conversion Co ions Co/CoO nanoparticle and COP N-doped carbon nanocapsules (CNC), respectively, form unique composite NPs embedded nanocapsule (CoCNC). CoCNC exhibits higher catalytic activity than Co3O4 activating MPS degrade because synergistic effects between CNC which not only acts support but also provides active sites. Hence, CoCNC+MPS could afford much lower Ea value (25.4 kJ/mol) degradation reported values. Moreover, still efficient removing even presence high-concentration NaCl SDS. can be recyclable over many cycles maintain activities, confirming that advantageous activation.