▎ 摘　　要

NOVELTY - A cyclodextrin functional graphene preparing method involves adding overweight hydrazine hydrate solution into oxidized graphite dispersed water solution protected by cyclodextrin. Overweight ammonia water is added after restoring the dispersed water solution, and filtered. The obtained cyclodextrin functional graphene is added into dispersed water solution. The dispersed water solution is dropped on the surface of clean glass carbon electrode, and placed under infrared light to obtain the cyclodextrin functional graphene as a chemical modification electrode. USE - Method for preparing cyclodextrin functional graphene that is utilized as a chemical modification material of glass carbon electrode. ADVANTAGE - The method enables preparing the cyclodextrin functional graphene in a simple, reliable and environmental friendly manner with high detection sensitivity, selectivity and stability, and low oxidizing reaction overpotential. The method enables combining structure character of cyclodextrin to mix the cyclodextrin into process of restoring oxidized graphite and break molecule acting power between graphene layers, so as to solve problem of accumulating and gathering again during the process of restoring oxidized graphite and obtain uniformly dispersed cyclodextrin functional graphene. DETAILED DESCRIPTION - A cyclodextrin functional graphene preparing method involves oxidizing common graphite into oxidized graphite using Hamel or Hummers method to prepare oxidized graphite (0.05 weight%). The graphite is subjected to a process of ultrasound and configuring after dispersing water solution to obtain uniformly dispersed oxidized graphite dispersed water solution. Cyclodextrin solution (3 weight%) is added into the cyclodextrin and stirred for 12 hours at 50 degrees C and cooled to room temperature to obtain oxidized graphite dispersed water solution protected by the cyclodextrin. Overweight hydrazine hydrate solution (80 weight%) is added into the oxidized graphite dispersed water solution protected by the cyclodextrin, and overweight ammonia water is added after restoring the oxidized graphite dispersed water solution protected by the cyclodextrin to remove overweight oxidant to obtain the cyclodextrin functional graphene after filtering obtained solution with 0.22 mu m nylon membrane. The obtained cyclodextrin functional graphene is added into dispersed water solution (1 mg/mL). The dispersed water solution is dropped on the surface of clean glass carbon electrode, and placed under infrared light to obtain the cyclodextrin functional graphene as a chemical modification electrode.