A preparation method of nitrogen-doped carbon quantum dots based on ionic liquid
A technology of ionic liquids and carbon quantum dots, applied in chemical instruments and methods, nanotechnology for materials and surface science, luminescent materials, etc., can solve problems such as polluting the environment, low raw material utilization, and poor dispersion
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Embodiment 1
[0026] A preparation method of nitrogen-doped carbon quantum dots based on ionic liquid, wherein the mass ratio of ionic liquid to urea is 2.9:1, and the ionic liquid is composed of glycerol and L-arginine with a molar ratio of 6:1 composition, specifically including the following steps:
[0027] (1) Mix 0.06mol (5.53g) glycerol and 0.01mol (1.74g) L-arginine, heat up to 110°C, and react at constant temperature for 5 hours to make the system uniform and transparent to obtain an ionic liquid;
[0028] (2) Mix 2.51 g of urea with the above-mentioned ionic liquid, heat up to 110° C., and react at a constant temperature for 1 hour to dissolve all nitrogen-containing compounds to obtain a nitrogen-doped ionic liquid;
[0029] (3) Mix 1 g of the nitrogen-doped ionic liquid with 30 g of deionized water, add it to a 50 ml polytetrafluoroethylene hydrothermal kettle, and conduct a hydrothermal reaction at 200 ° C for 10 h, using a filter paper with a pore size of 0.22 μm. Sand core su...
Embodiment 2
[0032] A preparation method of nitrogen-doped carbon quantum dots based on ionic liquid, wherein the mass ratio of ionic liquid to urea is 2.9:1, and the ionic liquid is composed of ethylene glycol and L-arginine with a molar ratio of 5:1 composition, specifically including the following steps:
[0033] (1) Mix 0.1mol (6.21g) of ethylene glycol and 0.02mol (3.48g) of L-arginine, heat up to 90°C, and react at a constant temperature for 1 hour to make the system uniform and transparent to obtain an ionic liquid;
[0034] (2) Mix 3.34 g of urea with the ionic liquid, raise the temperature to 90° C., and react at a constant temperature for 3 hours to dissolve all nitrogen-containing compounds to obtain a nitrogen-doped ionic liquid;
[0035] (3) Mix 1g of nitrogen-doped ionic liquid with 30g of deionized water, add it to a 50ml polytetrafluoroethylene hydrothermal kettle, conduct a hydrothermal reaction at 200°C for 10h, and use filter paper with a pore size of 0.22um for sand cor...
Embodiment 3
[0038] A preparation method of nitrogen-doped carbon quantum dots based on ionic liquids, wherein the mass ratio of the ionic liquids to urea is 3:1, and the ionic liquids are composed of glycerol and L-glucose in a molar ratio of 5-10:1 Amino acid composition, specifically comprises the following steps:
[0039] (1) Mix 0.16mol (14.81g) of glycerol and 0.02mol (2.94g) of L-glutamic acid, heat up to 110°C, and react at a constant temperature for 20 hours to make the system uniform and transparent to obtain an ionic liquid;
[0040] (2) Mix 5.92 g of urea with the ionic liquid, raise the temperature to 110° C., and react at a constant temperature for 1 hour to dissolve all nitrogen-containing compounds to obtain a nitrogen-doped ionic liquid;
[0041] (3) Mix 1.2g of nitrogen-doped ionic liquid with 30g of deionized water, add it to a 50ml polytetrafluoroethylene hydrothermal kettle, conduct hydrothermal reaction at 210°C for 21h, and use filter paper with a pore size of 0.22um...
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