▎ 摘　　要

NOVELTY - An air purification material comprises a three-dimensional network-like hierarchical porous structure mainly formed by overlapping graphene sheets. The porous structure comprises randomly distributed macropores, mesopores and pores. The macropores have pore volume of 0.05-1.05 cm3/g and a pore size of more than 1000 nm. The mesopores have pore volume of 0.1-1.2 cm3/g and pore size of 100-1000 nm. The pores have pore volume of 0.1-1.4 cm3/g and pore size of less than 100 nm. USE - Air purification material. ADVANTAGE - The air purification material has high specific surface area, improved pore size distribution, excellent PM1 blocking effect and purification efficiency, and reduced air flow resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of air purification material.