▎ 摘　　要

NOVELTY - A porous graphene gas sensor preparing method involves mixing liquid oxidizer and sulfate in oxidized graphene water solution using acid to adjust pH of 1-4 and sonicating to form graphene oxide dispersion liquid. The oxidized graphene dispersion liquid is subjected to ultraviolet treatment at 1500-3000 W for 30 seconds to 30 minutes and subjected to dialysis to obtain a porous reduced graphene dispersion liquid. The porous reduced graphene dispersion liquid is spin-coated to surface of electrode and dried to obtain finished product. USE - Method for preparing porous graphene gas sensor. ADVANTAGE - The method enables preparing the porous graphene gas sensor with high sensitivity, in a simple manner.