▎ 摘　　要

NOVELTY - Preparing membrane electrode involves using an indium tin oxide (ITO) electrode, dispersing functionalized nitrogen-doped graphene quantum dot-bismuth bromide nanocomposite in benzophenone to obtain a functionalized nitrogen-doped graphene quantum dot-bismuth bromide oxide colloidal solution. The acetone and water is used to clean the ITO electrode in turn, and put into the hydrogen peroxide-ammonia mixed aqueous solution to react. The ITO electrode is taken after the reaction and put into the functionalized nitrogen-doped graphene quantum dot-bismuth bromide oxide colloid solution. A DC voltage is applied to the ITO electrode for electrophoretic deposition to prepare a photoelectric functionalized nitrogen-doped graphene quantum dot-bismuth bromide ITO thin film electrode. USE - Method for preparing membrane electrode used to quantitatively detect the dose of acetaminophen (claimed). ADVANTAGE - The method enables to prepare membrane electrode, which has the characteristics of fast response time, wide linear range, low detection limit and good stability.