▎ 摘　　要

NOVELTY - Graphene-nano zinc oxide composite photocatalytic material is prepared by placing natural graphite in concentrated sulfuric acid, adding potassium persulfate (K2S2O8) and phosphorus pentoxide (P2O5), performing thermal reaction, diluting with deionized water, standing, filtering, washing with water, drying to obtain expanded natural graphite, performing Hummer's chemical method to oxidize natural graphite into graphite oxide, dispersing in deionized water, performing ultrasonic stripping to form graphene oxide sheets, and centrifuging to obtain graphene oxide dispersion liquid. USE - Preparation of graphene-nano zinc oxide composite photocatalytic material for adsorption and degradation of nitrosamine (claimed) used for tobacco. ADVANTAGE - Graphene-nano zinc oxide composite photocatalytic material has high photocatalytic activity and good absorbing and decomposing performance, and preparation is simple and low-cost. DETAILED DESCRIPTION - Graphene-nano zinc oxide composite photocatalytic material is prepared by placing natural graphite in concentrated sulfuric acid, adding potassium persulfate (K2S2O8) and phosphorus pentoxide (P2O5), performing thermal reaction, diluting with deionized water, standing, filtering, washing with water, drying to obtain expanded natural graphite, performing Hummer's chemical method to oxidize natural graphite into graphite oxide, dispersing in deionized water, performing ultrasonic stripping to form graphene oxide sheets, centrifuging to obtain graphene oxide dispersion liquid, adding nano-zinc oxide, performing ultrasonic dispersion, adding reducing agent and alkaline pH-adjusting agent, mixing, heating in water bath, performing in-situ reduction, and vacuum drying. DESCRIPTION OF DRAWING(S) - The drawing shows a transmission electron microscope (TEM) image of photocatalytic material.