查看文章

N-Doped carbon nanotubes encapsulating bimetallic Fe/Mn nanoparticles (FeMn@NCNTs) were fabricated after a one-step pyrolysis and were used as the catalyst for peroxymonosulfate activation to degrade acetamiprid. The FeMn@NCNTs showed uniform nanotubes with rich N doping and the encapsulated FeMn nanoparticles were doubly protected by both NCNTs and a clingy graphitic structure. The results indicated that the confined FeMn nanoparticles were designated as Fe2.7Mn0.3C according to the XRD pattern and elemental composition. Radical quenching indicated that SO4˙− and ˙OH were the dominant radicals in the FeMn@NCNTs/PMS system. The indispensable roles of both radical pathways of O2˙− and non-radical 1O2 in the superior catalytic performance were also confirmed. As a result, both the embedded FeMn nanoparticles and NCNTs in FeMn@NCNTs contributed to the acetamiprid …