▎ 摘　　要

NOVELTY - Preparing metal phthalocyanine-graphite phase carbon nitride/graphene ternary composite material, comprises (1) adding 25-125 mg metal phthalocyanine powder and 0.5-1 g graphitic carbon nitride powder to 5-10 ml 90-98% sulfuric acid solution, sealing and stirring at 90-110℃ for 2 hours, and cooling to room temperature to prepare solution A, (2) under ice bath conditions, adding 10-25 mg sodium nitrite powder to the solution A and stirring for 1 hour to prepare solution B, (3) adding 150-450 mg graphene oxide powder into 150 ml distilled water, and ultrasonically dispersing for 2 hours to prepare solution C, (4) at 25℃, dropping 1-5 ml solution B into 150 ml solution C within 2 minutes, and stirring for 1 hour, adding 100 mg ascorbic acid, stirring for 1 hour, separating the product by centrifugation, and washing with distilled water and ethanol for 3-5 times, drying at 80℃ to obtain final product. USE - The method for preparing metal phthalocyanine-graphite phase carbon nitride/graphene ternary composite material useful electro-catalytic reduction of carbon dioxide (claimed). ADVANTAGE - The metal phthalocyanine-graphite-phase carbon nitride/graphene ternary composite material has high dispersibility, large specific surface area, good conductivity and structure stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a metal phthalocyanine-graphite-phase carbon nitride/graphene ternary composite material, obtained by the method as mentioned above.