Preparation method of oxygen and chlorine co-doped graphene quantum dots
A graphene quantum dot and co-doping technology is applied in the field of preparation of oxygen and chlorine co-doped graphene quantum dots, and can solve the problems of graphene quantum dots such as low effective energy level of electronic transition, poor luminescence and luminescence modulation performance, etc. , to achieve the effects of good luminous properties and water solubility, wide application value, and environmental protection of the preparation process
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Embodiment 1
[0034] Example 1: Weigh 0.5 g of fructose, add 39.5 mL of deionized water, and stir to dissolve the sugar. Add 0.5 mL of hydrochloric acid (32%, wt) to the sugar solution and stir well. The reaction solution was heated at 170° C. for 4 hours under hydrothermal conditions. Cool the reaction solution to room temperature, perform dialysis purification with a dialysis bag with a molecular weight of 1000, collect samples, and obtain oxygen and chlorine co-doped graphene quantum dots with an average size of 5.4 nm.
Embodiment 2
[0035] Example 2: Weigh 1.5 g of glucose, add 38.5 mL of deionized water, and stir to dissolve the glucose. Add 0.2 mL of hydrochloric acid (32%, wt) to the glucose solution and stir well. The reaction solution was heated at 180°C under hydrothermal conditions for 2 hours. Cool the reaction solution to room temperature, perform dialysis purification with a dialysis bag with a molecular weight of 3000, collect samples, and obtain oxygen and chlorine co-doped graphene quantum dots with an average size of 7.2 nm.
Embodiment 3
[0036] Example 3: Weigh 0.3 g of sucrose, add 39.7 mL of deionized water, and stir to dissolve the sucrose. Add 0.6 mL of hydrochloric acid (32%, wt) to the sucrose solution and stir well. The reaction solution was heated at 190° C. for 3 hours under hydrothermal conditions. Cool the reaction solution to room temperature, perform dialysis purification with a dialysis bag with a molecular weight of 1000, collect samples, and obtain oxygen and chlorine co-doped graphene quantum dots with an average size of 4.9 nm.
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