▎ 摘　　要

NOVELTY - Production of three-dimensional graphene membrane capacitive desalination electrode involves ultrasonic dispersing polystyrene spheres in water, adding graphite oxide at mass ratio of 1:2-10, mixing, filtering, freeze-drying, calcining, adding concentrated nitric acid at mass ratio of 1:200-500, activating, reacting at 50-100 degrees C for 2-3 hours, cooling, filtering, washing with deionized water, drying at 40-60 degrees C to obtain activated graphene, dissolving amino acids in sodium hydroxide solution, adding hydrochloric acid and ice water at volume ratio of 3:10, and reacting. USE - Method for preparing three-dimensional graphene membrane capacitive desalination electrode. ADVANTAGE - The preparation method is fast, simple, inexpensive, and has high product performance. The electrode has improved ion selectivity, desalination properties, and regeneration performance. DETAILED DESCRIPTION - Production of three-dimensional graphene membrane capacitive desalination electrode comprises ultrasonic dispersing polystyrene spheres in water, adding graphite oxide at mass ratio of 1:2-10, mixing, filtering, freeze-drying, calcining, adding concentrated nitric acid at mass ratio of 1:200-500, activating, reacting at 50-100 degrees C for 2-3 hours, cooling, filtering, washing with deionized water, drying at 40-60 degrees C to obtain activated graphene, dissolving amino acids in sodium hydroxide solution, adding hydrochloric acid and ice water at volume ratio of 3:10, reacting at 0-5 degrees C for 10-15 minutes, adding nitrite solution, mixing for 10-15 minutes to obtain aryl diazonium salt, dispersing activated graphene in water, adding aryl diazonium salt at mass ratio of 1:20-100, mixing at 0-5 degrees C for 1-3 hours, filtering, washing, drying at 40-60 degrees C to obtain sulfonated graphene, ultrasonic dispersing polystyrene spheres in water, adding graphite oxide at mass ratio of 1:2-10, mixing, filtering, freeze-drying, calcining, adding concentrated nitric acid at mass ratio of 1:200-500, activating, reacting at 50-100 degrees C for 2-3 hours, cooling, filtering, washing, drying at 40-60 degrees C, adding 3-aminopropyltriethoxysilane at mass ratio of 5:1-4, mixing at 40-80 degrees C, filtering, washing with acetone to obtain aminated graphene, mixing three-dimensional graphene, sulfonated graphene, aminated graphene, acetylene black and PTFE emulsion at mass ratio of 80:10:10-90:5:5, and drying at 100-120 degrees C.