▎ 摘　　要

NOVELTY - Preparing nitrogen-doped modified graphene electrode material for absorbing electroreduction radionuclides, comprises e.g. adding the graphite powder, sodium nitrate into concentrated sulfuric acid and stirring in ice bath to obtain mixed solution A, adding potassium permanganate and de-ionized water into the mixed solution A, heating and stirring to obtain mixed solution C, adding hydrogen peroxide in the mixed solution C, stirring, filtering to obtain substance M, washing the substance M with hydrochloric acid, tertiary butanol, freezing and drying to obtain substance O, adding the substance O, and urea into deionized water and stirring, and reacting to obtain substance Q, adding acrylonitrile, substance Q into the deionized water, adding ammonium persulfate solution, removing the supernatant and washing to obtain substance S, adding the substance S into the hydroxylamine mixed solution K, after reacting, washing and drying to obtain final product. USE - The nitrogen-doped modified graphene electrode material is useful for absorbing electroreduction radioactive nuclide (claimed). ADVANTAGE - The method is simple. DETAILED DESCRIPTION - Preparing nitrogen-doped modified graphene electrode material for absorbing electroreduction radionuclides, comprises (i) adding 120 ml concentrated sulfuric acid to 1000 ml beaker, stirring for 10 minutes under ice bath conditions, adding 5 g graphite powder to beaker, reacting for 5 minutes, adding 3 g sodium nitrate to beaker, stirring for 60 minutes to obtain mixed solution A, (ii) adding 4 g of potassium permanganate to the mixed solution A, and then stirring for 12 minutes at room temperature to obtain mixed solution B1, (iii) slowly adding 6 g potassium permanganate to the mixed solution B1, and then stirring for 18 minutes at room temperature to obtain mixed solution B2, (iv) adding 4 g of potassium permanganate to the mixed solution B2, and stirring for 12 minutes at room temperature to obtain mixed solution B3, (v) adding 6 g potassium permanganate to the mixed solution B3, and then stirring for 140 minutes at room temperature to obtain mixed solution B, (vi) slowly adding 600 ml deionized water to mixed solution B, and then carrying out stirring reaction at 95degrees Celsius for 60 minutes to obtain mixed solution C, (vii) placing the mixed solution C in water bath at 60degreesC, adding 15 ml 30% hydrogen peroxide, stirring and reacting for 10 minutes to obtain mixed solution D, (viii) removing the supernatant of mixed solution D, and then filtering to obtain substance M, (ix) washing the substance M 3 times with 5% hydrochloric acid, and then washing 3 times with deionized water to obtain substance N, (x) washing the substance N 3 times with 20% tert-butanol solution, and freeze-drying for 3 hours to obtain substance O, (xi) adding 0.05 g substance O to 50 ml deionized water, and then stirring for 360 minutes at room temperature to obtain mixed solution E, (xii) adding 64 g urea to mixed solution E, and carrying out stirring reaction for 12 minutes under room temperature conditions to obtain mixed solution F, (xiii) transferring the mixed solution F to 100 ml hydrothermal reactor, and then reacting for 180 minutes under 170degreesC to obtain the mixed solution G, (xiv) removing the supernatant of mixed solution G to obtain substance P, (xv) washing substance P with deionized water 3 times, and drying at 50degrees C for 5 hours to obtain substance Q, (xvi) adding 2 ml acrylonitrile to 600 ml deionized water, then adding 0.4 g substance Q, and stirring for 140 minutes at room temperature to obtain mixed solution H, (xvii) placing the mixed solution H in water bath at 50 degrees Celsius, adding 200 ml 0.1M ammonium persulfate solution, reacting for 180 minutes to obtain mixed solution I, (xviii) removing the supernatant of mixed solution I to obtain substance R, (xix) washing substance R 3 times with solution having volume ratio of methanol to water of 5:1, and then washing 3 times with deionized water to obtain substance S, (xx) adding 140 g hydroxylamine hydrochloride into methanol and water mixed solution of 800 ml volume ratio 5:1 to obtain mixed solution J , (xxi) adjusting the pH of mixed solution J to 10 using 2M sodium hydroxide solution, and then filtering to remove sodium chloride and carrying out precipitation to obtain mixed solution K, (xxii) adding substance S into 200 ml mixed solution K to obtain mixed solution L, (xxiii) placing the mixed solution L in water bath at 70degreesC, and stirring for 180 minutes to obtain mixed solution M, (xxiv) removing the supernatant of mixed solution M to obtain substance T, (xxv) washing substance T with solution having volume ratio of methanol to water of 5:1 for 3 times, and then washing 3 times with deionized water to obtain substance U, and (xxvi) drying the substance U at 60degreesC for 5 hours to obtain final product.