▎ 摘　　要

NOVELTY - Preparing environmentally friendly coating comprises (i) ball milling a mixture of charcoal powder, sodium sulfonate, graphene, titanium dioxide, nano zinc oxide, fatty alcohol polyoxyethylene ether sodium sulfate and water; and (ii) mixing vinyl acetate-ethylene copolymer emulsion, aqueous ammonia, water and the ball mill mixture, the weight of charcoal powder, sodium sulfonate, graphite, titanium dioxide, the nano zinc oxide, fatty alcohol polyoxyethylene ether sodium sulfate and water is 30:0.4-0.6:0.05-0.08:20-26:1-1.8:4-6:60-80, where the ball milling condition comprises mass ratio of the large ball and small ball is 3:0.8-1.2, the mass ratio of the grinding ball and material is 10:0.8-1.2, milling at 2000-2500 revolutions/minute for 45-60 minutes to produces charcoal powder with average particle size of 3-5 mm. USE - The environmentally friendly coating is useful for regulating indoor air (claimed). ADVANTAGE - The method: is simple; and utilizes easily available raw materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for environmentally friendly coating, prepared as mentioned above.