▎ 摘　　要

NOVELTY - A graphene-nano gold modified carbon fiber electrode preparing method involves taking a carbon fiber, bonding it to copper wire with conductive silver glue, drying, and sending the carbon fiber into a capillary glass tube, utilizing solder to fix the copper wire and the carbon fiber in capillary glass tube, utilizing a micromanipulator to hang the capillary glass tube upside down with copper wire end facing down, heating the capillary glass tube at a fixed point, and subtracting the excess glass tube to obtain a carbon fiber electrode. The carbon fiber electrode is washed, dried, first mixed solution of graphene oxide and potassium chloride is prepared and sonicated, second mixed solution of chloroauric acid and potassium chloride is prepared and sonicated, the electrode is subjected to potentiostatic deposition to reduce graphene oxide, the electrode is taken out, washed and dried, the electrode is subjected to potentiostatic deposition of nano-gold to obtain the finished product. USE - Method for preparing graphene-nano gold modified carbon fiber electrode. ADVANTAGE - The method enables preparing graphene-nano gold modified carbon fiber electrode with excellent conductivity and sensitivity. DETAILED DESCRIPTION - A graphene-nano gold modified carbon fiber electrode preparing method involves taking a carbon fiber, bonding it to one end of a copper wire with conductive silver glue, drying the conductive silver glue to cure, and sending the carbon fiber into a capillary glass tube, utilizing solder to fix the copper wire and the carbon fiber in the capillary glass tube, utilizing a micromanipulator to hang the capillary glass tube upside down with the copper wire end facing down, heating the capillary glass tube at a fixed point under the action of gravity traction, and subtracting the excess glass tube to obtain a carbon fiber electrode. The carbon fiber electrode is washed with distilled water, dried it in air, first mixed solution of 0.5-1.0 mg/ml graphene oxide and 0.025-0.05 mol/L potassium chloride is prepared and sonicated for 30 minutes, second mixed solution of 1-3 mmol/L chloroauric acid and 0.1-0.3 mol/L potassium chloride is prepared and sonicated uniformly, the electrode is subjected to potentiostatic deposition to reduce graphene oxide in first mixed solution, after the deposition is finished, the electrode is taken out and washed with distilled water, the deposition potential is -1.2V, the deposition time is 30-100 seconds, and it is dried in the air for 10 minutes, the electrode is subjected to potentiostatic deposition of nano-gold in second mixed solution-B, the deposition potential is -0.2 V, and the deposition time is 50-200 seconds to obtain the finished product.