Preparation method of solid carbon dot fluorescent powder with high quantum yield and application of solid carbon dot fluorescent powder in LED (Light Emitting Diode) lamp bead
A high-quantum, fluorescent powder technology, applied in the field of nanomaterials, can solve problems such as complex purification processes, and achieve the effects of simple operation, fast preparation, and low cost
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Embodiment 1
[0047] Weigh 1.0g of potassium hydrogen phthalate, 0.5g of sodium azide, and 1.0g of boric acid, put them in a 250mL beaker, dissolve them in 20mL of formaldehyde solution, ultrasonicate for 5min to dissolve, put the mixed solution in a household microwave oven and heat it with a power of 225W 10min. After the reaction, the liquid was completely evaporated to obtain a white powder with an absolute quantum yield of 5.4%.
Embodiment 2
[0049] Weigh 0.5g of potassium hydrogen phthalate, 0.5g of sodium azide, and 0.75g of boric acid, put them in a 250mL beaker, dissolve them in 20mL of formaldehyde solution, ultrasonicate for 5min to dissolve, put the mixed solution in a household microwave oven and heat it with a power of 375W 4min. After the reaction, the liquid evaporated completely to obtain a white powder with an absolute quantum yield of 7.2%.
Embodiment 3
[0051] Weigh 0.25g of potassium hydrogen phthalate, 0.5g of sodium azide, and 1.0g of boric acid, put them in a 250mL beaker, dissolve them in 15mL of formaldehyde solution, ultrasonicate for 5min to dissolve, put the mixed solution in a household microwave oven and heat it with a power of 375W 6min. After the reaction, the liquid evaporated completely to obtain a white powder with an absolute quantum yield of 11.8%.
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