A confinement approach to fabricate hybrid PBAs-derived FeCo@NC yolk-shell nanoreactors for bisphenol A degradation

In this study, a FeCo [email protected] carbon yolk-shell nanoreactors (ANCYNs) was synthesized through the confinement pyrolysis of the polydopamine (PDA)-coated Fe/Co Prussian blue analogs (PBAs). The PDA-derived carbon shell formed preferentially via pyrolysis is of relevance to (i) protecting the framework structure from collapsing, (ii) increasing the specific surface areas and pore volumes, (iii) facilitating the adsorption of pollutants, and (iv) solving the metal leaching problem. The resulting ANCYNs exhibits good peroxomonosulfate (PMS) activation to degrade bisphenol A (BPA) (removing 98% of BPA in 5 mins), which is significantly better in catalytic performance and stability than those of the [email protected] or Nano-alloy catalysts. First-principles calculations indicate that the charge density redistribution becomes much more pronounced when adsorbed on nitrogen-doped graphene with the compressive strain, which leads to a higher density of active sites exposed. The radicals and non-radical processes were confirmed to be simultaneously responsible for BPA degradation.