▎ 摘　　要

NOVELTY - P-Nitrophenol testing graphene/nano silver nickel alloy electrode comprises: putting graphite powder and concentrated sulfuric acid into three-necked bottle, stirring, placing into ice water bath, adding sodium nitrate and potassium permanganate, stirring, stirring, continuously stirring, placing into water bath, reacting, adding distilled water for diluting, adding hydrogen peroxide to golden yellow, adding diluted hydrochloric acid, cooling by centrifuging, and semi-permeable dialyzing to neutral to prepare graphene oxide. USE - Method for p-nitrophenol testing graphene/nano silver nickel alloy electrode (claimed). ADVANTAGE - The method uses p-nitrophenol used for explosive, dyes and pharmaceutical intermediate fine chemical industry and having strong carcinogenic action. DETAILED DESCRIPTION - P-Nitrophenol testing graphene/nano silver nickel alloy electrode comprises: (A) putting 1.2 g graphite powder and 50 mL concentrated sulfuric acid into 500 mL three-necked bottle, stirring for 30 minutes, placing into ice water bath at 0-4 degrees C, adding 1.5 g sodium nitrate and 10 g potassium permanganate, stirring for 2 hour, stirring for 2 hours, continuously stirring at room temperature for 1 hour, placing into 35 degrees C water bath, reacting for 10 hours, adding distilled water for diluting for 10 hours, adding hydrogen peroxide to golden yellow, adding diluted hydrochloric acid, cooling by centrifuging, and semi-permeable dialyzing to neutral to prepare graphene oxide; (B) weighing and taking nickel sulfate and silver nitrate, adding 30 mL distilled water into cup, dissolving at room temperature, adding with 20 ml graphene oxide into 500 ml three-necked bottle, ultrasonically oscillating at room temperature for 1 hour, mixing, transferring into water bath, connecting condensing pipe into three-necked bottle port, water bath heating to 80 degrees C, adding sodium hydroxide mixed solution, regulating pH to 9-10, adding reduction agent hydrazine hydrate, stirring for 45 minutes, cooling to room temperature, suction filtering under reduced pressure, washing using deionized water to neutral and anhydrous ethanol, vacuum drying at 50 degrees C for 24 hours, and grinding into powder; (C) soaking carbon electrode into concentrated nitric acid for 24 hours, grinding, polishing, ultrasonically processing using distilled water at room temperature for 10-15 minutes, alternating ultrasonically washing using acetone and anhydrous alcohol, drying, taking 0.05 g powder, uniformly dispersing into 1.0 ml Nafion (RTM: perfluoro-sulfonic acid polymer) solution, dripping into pre-treated carbon electrode, and vacuum drying at room temperature for 3 hours; and (D) dissolving p-nitrophenol into deionized water to 0.01 M p-nitrophenol solution, dissolving sodium hydroxide solution to p-nitrophenol solution containing alkali concentration, taking p-nitrophenol solution containing alkali concentration, arranging into electrolytic tank, inserting three electrode using carbon electrode as working electrode, platinum electrode as pair electrode and mercury/mercury oxide electrode as reference electrode, connecting electrochemical working station, and setting scanning area at 0.1-1.0 V.