▎ 摘　　要

NOVELTY - A sodium-doped bismuth vanadate/graphene paste electrode sensor preparing method involves adding 73-76 mass% 1-allyl-3-methylimidazolium chloride salt, 6-8 mass% sodium tartrate, 16-20 mass% pretreated reed leaf powder in the reaction kettle, stirring uniformly, sealing, placing in an oven of 110 plus minus 2 degrees C, and reacting for 12-14 hours, and cooling to room temperature to obtain a sodium doped carbon-containing quantum dot adhesive, adding 32-34 mass% bismuth vanadate, 35-38 mass% graphene oxide, 12-16 mass% sodium doped carbon-containing quantum dot adhesive, 4-6 mass% ammonium polyacrylate, 10-14 mass% ethanol in the agate mortar, and grinding uniformly to obtain a bismuth vanadate/graphene/sodium doped carbon-containing quantum dot mixture carbon paste. The mixture carbon paste is filled into a glass tube with a wire of phi 5.5 mm, and the gas is removed, compacted, dried, polished with metallographic abrasive paper, deionized water, and washed with ethanol to obtain the finished product. USE - Method for preparing a sodium-doped bismuth vanadate/graphene paste electrode sensor. ADVANTAGE - The method enables preparing a sodium-doped bismuth vanadate/graphene paste electrode sensor with high sensitivity and selectivity, 4-6 times better conductivity than the common carbon paste electrode, wide electrochemical window, surface is easy to update, and small residual current, in simple manner. DETAILED DESCRIPTION - A sodium-doped bismuth vanadate/graphene paste electrode sensor preparing method involves adding 73-76 mass% 1-allyl-3-methylimidazolium chloride salt, 6-8 mass% sodium tartrate, 16-20 mass% pretreated reed leaf powder in the reaction kettle, stirring uniformly, when the sum of the mass percentages of each component is 100%, sealing, placing in an oven of 110 plus minus 2 degrees C, and reacting for 12-14 hours, and cooling to room temperature to obtain a pale yellow viscous liquid, that is sodium doped carbon-containing quantum dot adhesive, adding 32-34 mass% bismuth vanadate, 35-38 mass% graphene oxide, 12-16 mass% sodium doped carbon-containing quantum dot adhesive, 4-6 mass% ammonium polyacrylate, 10-14 mass% ethanol in the agate mortar, when the sum of the mass percentages of each component is 100%, and grinding uniformly to obtain a bismuth vanadate/graphene/sodium doped carbon-containing quantum dot mixture carbon paste. The mixture carbon paste is filled into a glass tube with a wire of phi 5.5 mm, and the gas is removed, compacted, dried, polished with metallographic abrasive paper, deionized water, and washed with ethanol to obtain the finished product. An INDEPENDENT CLAIM is also included for a sodium-doped bismuth vanadate/graphene paste electrode sensor prepared by the method.