▎ 摘　　要

NOVELTY - Preparing three-dimensional cellular carbon-based nanomaterial with adjustable zinc oxide loading aperture comprises (i) preparing oxidized graphene suspension, (ii) adding zinc oxide into graphene oxide suspension obtained in step (i), ultrasonically mixing to obtain zinc oxide-graphene oxide dispersion, (iii) adding polyvinyl alcohol into deionized water, heating, stirring to dissolve to obtain polyvinyl alcohol aqueous solution and mixing with zinc oxide-graphene oxide dispersion obtained in step (ii) and sonicating to obtain polyvinyl alcohol-zinc oxide-graphene oxide hydrogel, (iv) introducing the polyvinyl alcohol-zinc oxide-graphene oxide hydrogel obtained in step (iii) into cylindrical freezing tube using ice framework assembling method, performing low temperature freezing, then subjecting the hydrogel into vacuum freeze drying to obtain cylindrical three-dimensional cellular carbon-based nanomaterial with porous structure. USE - The three-dimensional cellular carbon-based nanomaterial with adjustable zinc oxide loading aperture is useful in waste water treatment. ADVANTAGE - The method: adjusts the pore size of the three-dimensional honeycomb carbon-based nano material by changing the size of the polyvinyl alcohol molecular weight; utilizes zinc oxide loaded on the three-dimensional honeycomb carbon-based nano-material which has no agglomeration and high dispersion, which improves the absorption and utilization of light, greatly enhances the photocatalytic performance of zinc oxide, produces three-dimensional honeycomb carbon-based nano material which has excellent mechanical strength and can be recycled. DETAILED DESCRIPTION - Preparing three-dimensional cellular carbon-based nanomaterial with adjustable zinc oxide loading aperture comprises (i) mixing graphene oxide into water and ultrasonically dispersing to obtain oxidized graphene suspension, (ii) adding zinc oxide into graphene oxide suspension obtained in step (i), ultrasonically mixing to obtain zinc oxide-graphene oxide dispersion, (iii) adding polyvinyl alcohol into deionized water, heating, stirring to dissolve to obtain polyvinyl alcohol aqueous solution, mixing the aqueous solution of polyvinyl alcohol with zinc oxide-graphene oxide dispersion obtained in step (ii) and sonicating for 0.5-2 hours to obtain polyvinyl alcohol-zinc oxide-graphene oxide hydrogel, (iv) introducing the polyvinyl alcohol-zinc oxide-graphene oxide hydrogel obtained in step (iii) into cylindrical freezing tube using ice framework assembling method and performing low temperature freezing until the internal temperature of the polyvinyl alcohol-zinc oxide-graphene oxide hydrogel and the freezing temperature remaining same and no longer changing and the liquid water inside the hydrogel is all converting to ice, then subjecting the hydrogel into vacuum freeze drying to obtain cylindrical three-dimensional cellular carbon-based nanomaterial with porous structure.