▎ 摘　　要

NOVELTY - Preparing zinc oxide nanowire array/three-dimensional nitrogen-doped reduced graphene oxide (rGO) nanotube composite material comprises (i) using graphite powder as raw material to obtain graphene oxide suspension, (ii) immersing melamine sponge in the graphene oxide suspension and carrying out pretreatment, drying graphene oxide composite sponge and then calcining for the first time, and removing the polymer template to obtain three-dimensional nitrogen-doped reduced graphene oxide, (iii) dispersing zinc acetate in ethanol to obtain mixture A, soaking three-dimensional nitrogen-doped reduced graphene oxide in the mixture A, and(iv) mixing zinc nitrate, urea and hexamethylenetetramine to obtain mixed solution B, soaking the zinc-oxide seed nitrogen-doped reduced graphene oxide in the mixed solution B, uniformly stirring, carrying out the hydrothermal reaction in the high-pressure hydrothermal kettle, rinsing reaction product and then calcining for the third time. USE - The material is useful in field of photocatalytic reduction of carbon dioxide (claimed). ADVANTAGE - The method: exhibits excellent photocatalytic activity; has good carbon dioxide adsorption performance, and good catalytic effect for photocatalytic reduction of carbon dioxide. DETAILED DESCRIPTION - Preparing zinc oxide nanowire array/three-dimensional nitrogen-doped reduced graphene oxide (rGO) nanotube composite material comprises (i) using graphite powder as raw material to obtain graphene oxide suspension, (ii) immersing melamine sponge in the graphene oxide suspension and carrying out pretreatment to obtain graphene oxide composite sponge, drying graphene oxide composite sponge and then calcining for the first time, and removing the polymer template to obtain three-dimensional nitrogen-doped reduced graphene oxide, (iii) dispersing zinc acetate in ethanol to obtain mixture A, soaking three-dimensional nitrogen-doped reduced graphene oxide in the mixture A, and forming zinc-oxide seed crystal nitrogen-doped reduced graphene oxide by the second calcinations, and(iv) mixing zinc nitrate, urea and hexamethylenetetramine to obtain mixed solution B, soaking the zinc-oxide seed nitrogen-doped reduced graphene oxide in the mixed solution B, uniformly stirring, carrying out the hydrothermal reaction in the high-pressure hydrothermal kettle, rinsing reaction product and then calcining for the third time, post-processing to obtain zinc-oxide nanowire array/three-dimensional nitrogen-doped reduced graphene oxide nanotube composite material. An INDEPENDENT CLAIM is also included for zinc-oxide nanowire array/three-dimensional nitrogen-doped reduced graphene oxide nanotube composite material, comprising three-dimensional nitrogen-doped reduced graphene oxide nanotube framework and a zinc-oxide nanowire array grown on the surface of the three-dimensional nitrogen-doped reduced graphene oxide nanotube framework. The framework of the three-dimensional nitrogen-doped reduced graphene oxide nanotubes is a mesh porous structure. The zinc-oxide nanowire array vertically covers the surface of the three-dimensional nitrogen-doped reduced graphene oxide nanotube nanotube skeleton.