▎ 摘　　要

NOVELTY - Manufacture of electrode material involves reacting 4-8 pts. wt. carboxyl-modified graphene with 30-42 pts. wt. thionyl chloride at 60-65 degrees C for 8-12 hours, filtering, adding 35-40 pts. wt. ethylene glycol, refluxing at 105-114 degrees C for 22-24 hours, filtering, washing with deionized water, drying to obtain hydroxyl-modified graphene, dispersing hydroxyl-modified graphene in 130-140 pts. wt. ethanol, adding 10-15 pts. wt. cyanooxysilane modifier (I), stirring, centrifuging, washing with ethanol and water to obtain cyanide-modified graphene, polishing a glassy carbon electrode, washing with ultrapure water and anhydrous ethanol, drying with nitrogen, dispersing cyanide-modified graphene in ultrapure water, immersing the electrode in the mixed solution, naturally air-drying to obtain a modified electrode, placing the modified electrode in a electrodeposition bath, depositing with a constant potential voltage of 2-3V, and air-drying. USE - Manufacture of electrode material used for electrochemically detecting uric acid in urine (claimed). ADVANTAGE - The method enables efficient manufacture of electrode material with excellent catalytic effect on uric acid, and detection stability for uric acid. DETAILED DESCRIPTION - The cyanooxysilane modifier is of formula (I). The modifying mixture contains concentrated sulfuric acid and 20-30 wt.% hydrogen peroxide. The acid-modified graphene is obtained by preparing graphene oxide by Hummers method, dispersing graphene oxide in water to obtain 4-8 mg/mL graphene oxide dispersion, adding 50-60 mL graphene oxide dispersion to 30-50 mu L 70-80 wt.% hydrazine hydrate solution, reacting at 85-90 degrees C, filtering, washing, drying to obtain graphene, mixing 12-20 pts. wt. graphene and 25-30 pts. wt. acid mixture, ultrasonically heating, filtering, and washing with deionized water. The carboxyl-modified graphene is obtained by 20-25 pts. wt. acid-modified graphene and 32-40 pts. wt. modifying mixture, heating to 65-70 degrees C, reacting, filtering, washing with deionized water, and drying. The electrodeposition bath contains 1-3 mol/L sodium chloride, 20-35 mmol potassium ferricyanide, and 20-25 mmol bismuth nitrate, and 25-40 mmol cerium nitrate. R1-R3 = linear or branched 1-10C alkyl, preferably ethyl or isopropyl. An INDEPENDENT CLAIM is included for an electrochemical method for detecting uric acid in urine.