Core-Shell-Structured MOF-derived 2D Hierarchical Nanocatalysts with Enhanced Fenton-like Activities
The Fenton-like reactions activated by peroxymonosulfate for the efficient and environmental degradation of refractory pollutants have gained engaging attention in recent years. However, the fabrication of Fenton-like catalysts with adequate activities and stability towards toxic benzene derivates is still a long-term goal. Herein, we report a novel Fenton-like 2D porous carbon catalyst with co-anchoring of Co-Nx sites and Co nanocrystalline by annealing core-shell bimetallic metal-organic frameworks (MOF) coated graphene oxide. During carbonization, the N-ligands in MOF provide self-pyrolyzed reducing gases, the Co2+ salts and gradually formed Co nanocrystallines serve as the in-situ catalysts for growth of Co/Co-Nx co-doped carbon nanotubes, which avoids the use of chemical vapor deposition process. Benefiting from the unique core-shell MOF nanostructures, the fabricated 2D hierarchical catalysts display delicate micro/mesoporous structures, conductive carbon frameworks, and abundant Co/Co-Nx/pyridinic-N active sites. These unique advantages endow the catalysts with high degradation efficiency towards different toxic benzene-derived compounds, such as bisphenol A, phenol, biphenyl, naphthalene, and even benzene-derived macromolecules. This research not only provides Fenton-like catalysts with excellent potential for the water remediation of benzene-derived contaminants, but also takes a step towards the production of advanced metal/metal-N co-doped 2D porous carbon for diverse catalytic and energy applications.