▎ 摘　　要

NOVELTY - Preparing porous heteroelement modified 2D-carbon material comprises (1) adding a specific amount of hetero element-containing ionic liquid to graphene or graphyne, and the hetero element-containing ionic liquid is at least one of boron-containing, nitrogen-containing, phosphorus-containing and sulfur-containing ionic liquids, performing microwave digestion pretreatment to make the hetero elements uniformly distributed on the surface of graphene or graphyne; (2) placing the obtained mixture in an atmosphere containing boron, nitrogen, phosphorus and/or sulfur, and performing pre-adsorption at 200-500 degrees C; (3) using ionomers to perform further defect site etching and doping modification on the pre-adsorbed material; and (4) finally, washing the material obtained in step (3), and drying to obtain a porous heteroelement modified two-dimensional carbon material. USE - The carbon material is useful as a catalyst in reaction of acetylene hydrochlorination to synthesize vinyl chloride (claimed). ADVANTAGE - The carbon material: has high specific surface area, rich-pore structure, dispersed defect sites and high thermal stability, and has good catalytic activity and stability in the hydrochlorination of acetylene.