▎ 摘　　要

NOVELTY - Preparing red-orange light and blue-violet light conversion agent for agricultural film, comprises (i) dissolving terbium nitrate in absolute ethanol to obtain terbium nitrate ethanol solution; (ii) adding urea into high-temperature tube furnace to heat, insulating to obtain graphene-like carbonized nitrogen via high-temperature thermal condensation, cooling, and grinding; (ii) adding aqueous solution of graphene-like carbonized nitrogen into a round bottom flask, adding polyacrylic acid under stirring, stirring and reacting, then transferring into the digital display for heating, continuing to stir the reaction, cooling, washing, and drying to obtain carboxylated graphene-like nitrogen carbide powder; (iv) ultrasonically dispersing carboxylated graphene-like carbonized nitrogen powder in ethanol solution, adding terbium nitrate ethanol in the carboxylated graphene-like carbonized nitrogen suspension, sonicating to obtain a suspension of graphitic carbon nitride terbium carboxylate. USE - The red-orange light and blue-violet light conversion agent is useful for preparing light conversion material for agricultural film (claimed). ADVANTAGE - The conversion agent for agricultural film has good compatibility with the organic phase of agricultural film, good dispersibility, strong binding force, wide range of ultraviolet light conversion, high light conversion efficiency, light conversion effect and high photosynthesis matching degree, and it can effectively promote the photosynthesis required for the growth of crops in the agricultural film shed. DETAILED DESCRIPTION - Preparing red-orange light and blue-violet light conversion agent for agricultural film, comprises (i) dissolving 0.5-1 mmol terbium nitrate in 20 ml absolute ethanol to obtain a terbium nitrate ethanol solution; (ii) adding 3-5 mmol urea into a high-temperature tube furnace to heat to 400-600°C at a rate of 310°C/minute, insulating for 4-5 hours to obtain graphene-like carbonized nitrogen through high-temperature thermal condensation, cooling, and grinding; (ii) adding aqueous solution of graphene-like carbonized nitrogen into a round bottom flask, adding 80-110 mg polyacrylic acid under stirring, stirring and reacting for 10 minutes, then transferring into the digital display for heating, continuing to stir the reaction at 80-95°C for 10-30 minutes in the stirrer, after cooling to room temperature, washing with deionized water repeatedly, and drying at 45°C for 12 hours to obtain carboxylated graphene-like nitrogen carbide powder; (iv) ultrasonically dispersing carboxylated graphene-like carbonized nitrogen powder in 40 ml ethanol solution, adding terbium nitrate ethanol in the carboxylated graphene-like carbonized nitrogen suspension, sonicating for half an hour to obtain a suspension of graphitic carbon nitride terbium carboylate; (v) dissolving 2,2'-diphenyl ether dicarboxylic acid and o-phenanthroline in absolute ethanol, adjusting the pH to 6 with sodium hydroxide ethanol solution to prepare the mixed solution of the ligand; (vi) adding the mixed solution of the ligand dropwise to the suspension of g carbon nitride terbium carboylate under constant stirring, and adjusting the pH to 6-7 with sodium hydroxide ethanol solution, stirring at 60°C for 3-4 hours, after the reaction, allowing the obtained solution to stand for 1-2 hours, and suction filtering to obtain a white precipitate; (vii) washing the yellow-white precipitate with ethanol and tetrahydrofuran (THF) repeatedly until no red fluorescence is detected in the filtrate, and then drying in an oven at 60°C for 12 hours to obtain graphene-like nitrogen carbide-supported rare earth ternary organic complex composite light conversion material.