▎ 摘　　要

NOVELTY - Preparation of graphite-based ammonia sensor comprises adding copper acetate solution to aqueous dispersion of graphene oxide, magnetically stirring at room temperature for 12 hours to obtain brown turbid liquid, adding sodium hydroxide solution, standing to obtain brown-green precipitate to reaction kettle, adding glucose aqueous solution, placing reaction kettle in high-temperature experimental box, hydrothermally reacting, repeatedly washing with water and ethanol, centrifuging, dispersing in ethanol, depositing on interdigital electrode devices, vacuum-drying at 70 degrees C and storing. USE - Method for preparing graphite-based ammonia sensor (claimed). ADVANTAGE - The sensor has high sensitivity, good selectivity and fast desorption. DETAILED DESCRIPTION - Preparation of graphite-based ammonia sensor comprises adding 15-25 mL of 8-12 mM copper acetate solution to 20-30 ml of 0.2-0.4 mg/mL aqueous dispersion of graphene oxide, magnetically stirring at room temperature for 12 hours to obtain brown turbid liquid, adding 15-25 mL of 15-17 mM sodium hydroxide solution, standing for 10 hours to obtain brown-green precipitate to 50-mL reaction kettle, adding 25-35 mL of 5-7 mM glucose aqueous solution, placing reaction kettle in high-temperature experimental box, hydrothermally reacting at 96 degrees C for 10 hours, repeatedly washing with water and ethanol, centrifuging, dispersing in ethanol, depositing on interdigital electrode devices, vacuum-drying at 70 degrees C and storing.