▎ 摘　　要

NOVELTY - Composite nanomaterial comprises 15-55 wt.% composite material of graphene oxide, 30-50 wt.% carbon nanoparticles, 5-10 wt.% nano titanium dioxide,1-3 wt.% nano silver particles, where the thickness carbon nano particles, nano titanium dioxide and nano silver particles loaded on the surface of the graphene oxide nano sheet is 4-12nm, silver nano-particles having a particle size of 20-50 nm, the material ratio surface area is 700-900 m2/g, the pore volume is 0.3-0.5 cm3/g. USE - The Composite nano material is useful for air purification e.g. removing the formaldehyde in the air and inhibiting all kinds of bacteria (all claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing Composite nanomaterial comprising using oxidized graphite alkene, placing at 0 degrees C ice bath, adding 0.015-0.072 g graphite powder and dispersing in 20-25 ml concentrated sulfuric acid, stirring and adding potassium permanganate, adding potassium permanganate 3-4 times the graphite powder, stirring for 60-30 minutes, maintaining temperature at 30-35 degrees C, adding 40-50 ml de-ionized water, stirring for 20-30 minutes, adding 10-15 ml 30% hydrogen peroxide, stirring for 5-20 minutes, centrifuging and separating, adding 5% hydrochloric acid solution, de-ionized water and acetone repeatedly washing to obtain graphite oxide nano sheet, adding obtained graphite oxide product and placing in 250 ml flask, adding 150 ml solvent, placing the flask in 120 Hz of the ultrasonic cleaning machine for 1 hour, removing solvent to obtain graphene oxide, (ii) preparing graphene oxide/carbon nano particle: adding 15-25 g carbon source and ferrocene, adding to a mixed solvent of 50-80 ml absolute ethanol/water, forming a uniform and stable solution, and adding 10-20 g step (i) graphite diluted nano oxide, stirring for 1-2 hours at room temperature to form a uniform stable mixed solution, adding into reaction kettle and adding reaction kettle in homogeneous reactor for heat treatment, heating at 160-200 degrees C for 12-24 hours, washing and drying the product, and under inert atmosphere at 400-500 degrees C for 4-12 hours to obtain the graphene oxide/carbon nanometer particle material, (iii) using oxidized graphite alkene/carbon nanoparticles/nano titanium dioxide/silvere nano-particle preparation: firstly dissolving the 0.2-2 g silver nitrate into 20-30 ml absolute ethyl alcohol, to obtain transparent silver nitrate ethanol solution, adding ethyl acetate to prepare silver nitrate ethanol solution, 1.5-4 g tetrabutyl titanate, glacial acetic acid, stirring for 8-12 minutes, uniformly mixing to obtain the mixed solution, adding mixed liquid, preparing 5-15 g graphene oxide/carbon nano-particle material, stirring for 30-60 minutes, adding polytetrafluoroethylene substrate materials into reaction kettle at 120-160 degrees C for 12-24 hours, to obtain solid product, washing the obtained solid product, drying and roasting to obtain the composite nano material.