▎ 摘　　要

NOVELTY - Preparing graphene filter material comprises (i) activating the activated carbon by soaking the activated carbon in the graphene-containing hydrogen peroxide solution, and drying the activated carbon, and (ii) soaking the activated carbon in complex solution, and drying the activated carbon to obtain the product. USE - The graphene filter material is useful in air purifying device (claimed). ADVANTAGE - The graphene filter material has strong activated carbon adsorption ability, good stability, achieves formaldehyde removal efficiency reaches more than 90%. The method is simple, environmentally friendly, and does not generate pollution.