▎ 摘　　要

NOVELTY - Preparation of D-pi-A organic molecule-based structure graphene composite gas-sensing material comprises weighing graphene oxide, dispersing in deionized water to prepare 1 mg/mL dispersion, and sonicating for 40 minutes and 1 hour; adding organic molecule having D-pi-A structure, mixing, sonicating, where ratio of organic molecules to matrix material is 20:1; adding hydrazine hydrate, oil bath heating at 80 degrees C for 1 hour, and reduction reacting, where mass ratio of hydrazine hydrate and graphene oxide is 3:1; and vacuum filtering, repeatedly washing, and dispersing in deionized water. USE - Method for preparing D-pi-A organic molecule-based structure graphene composite gas-sensing material (claimed). ADVANTAGE - The material high selectivity and sensitivity, good recovery and stability, and low cost and is environment-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for gas-sensitive detection comprising take 0.1 mL dispersion, adding to test electrodes, heating at 40 degrees C, and drying; connecting to gas sensing equipment; testing 1-2 ppm nitrogen dioxide; testing gas with 10 ppm ammonia, methanol, acetone, and ethanol; and placing at different times and testing nitrogen dioxide.