Constructing Porous Carbon Nitrogen Via Supramolecular Assembly For Catalysis

Graphitic carbon nitride and graphene nanomaterials are regarded as a good choice for both photo-and electro-catalysis due to their low cost,simple synthesis process and excellent physical and chemical properties.This paper mainly focus on increasing the surface area,forming mesoporous structure with the template-less strategy of graphene materials and doping heterotopic atoms with supramolecular self-assembly technology.Based on different research aspects,we designed a class of porous and with different atoms doped graphene materials,then investigated the applications of these two materials in photo-catalysis and electro-catalysis which aimed to explore the relationship between mesoporous structure,doping content and catalytic properties.Specific studies include:Aerobic oxidation of amines and hydrogen evolution over oxygen-modified mesoporous g-C₃N₄:merging supramolecular oxidation with photo-catalysis A template-free strategy for engineering both the mesoporosity and concentration of oxygen dopants of carbon nitride for highly efficient photo-catalytic reactions under visible light irradiation.The as-formed mesoporous g-C₃N₄ functioned as an efficient metal-free photo-catalyst for selective oxidation of amines into imines and splitting water under visible light.Constructing holey graphene monoliths via supramolecular assembly:enriching nitrogen heteroatoms up to theoretical limit for hydrogen evolution reaction.Carbo-catalysts with low cost and high stability are highly desirable to substitute expensive Pt-based materials for electro-catalysis.High conductivity,highly porous structure and high concentration of dopants are essential for efficient metal-free carbon-based electro-catalysts.Herein,a facile method was utilized to fabricate nitrogen-rich holey graphene monoliths?Nr-HGM?from cheap molecules and ammonium sulfate with the nitrogen content reaching to the upper limit of nitrogen-doped carbons.Our sample showed outstanding electrochemical catalytic activity and stability for hydrogen evolution reaction?HER?and Oxgen Reduction Reaction?ORR?in both acid and base electrolytes.