▎ 摘　　要

NOVELTY - A zinc oxide nano-wall/reduced graphene oxide heterojunction gas sensor preparing method involves combining reduced graphene thin film in silver interdigital electrode by vacuum suction filtration combined heat reduction process, growing single crystalline zinc oxide nanometer wall on reduction graphene thin film surface by using water solution technique and building zinc oxide nano-wall/reduced graphene oxide heterojunction in argon atmosphere under high temperature heat treatment to obtain finished product. USE - Method for preparing zinc oxide nano-wall/reduced graphene oxide heterojunction gas sensor. ADVANTAGE - The method enables preparing zinc oxide nano-wall/reduced graphene oxide heterojunction gas sensor with strong connection force, high sensitivity detection and increased electron transfer rate.