Red light doped graphene quantum dot and preparation method thereof
A graphene quantum dot and red light technology, applied in the field of material chemistry, can solve the problems of limited types and quantities of red light doped graphene quantum dots, and achieve the effects of high yield, high quantum yield and high fluorescence intensity
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[0024] see figure 1 On the one hand, the embodiment of the present invention provides a method for preparing red light-doped graphene quantum dots. The method includes: step 101, mixing a precursor material with a solvent to obtain a precursor solution; step 102, passing the precursor solution through water Thermal synthesis treatment to obtain a reaction product; step 103, purification treatment of the reaction product to obtain red light-doped graphene quantum dots.
[0025] The preparation method provided by the embodiments of the present invention is used to prepare red-light-doped graphene quantum dots. The red-light-doped graphene quantum dots prepared by this method have higher fluorescence intensity and higher yield. ) emits red fluorescence under irradiation. This method realizes the preparation of graphene quantum dots with red fluorescent light. Compared with the traditional method, the operation of this method is simpler, and the prepared graphene quantum dots hav...
Embodiment 1
[0044] First, 0.1 mmol of benzyl bromide and 1 mmol of glucose were obtained, and 10 mL of ethanol was obtained as a solvent.
[0045] Then, 0.1 mmol of benzyl bromide and 1 mmol of glucose were mixed with 10 mL of ethanol, and dissolved by ultrasonication for 10 min to form a precursor solution. The above-mentioned benzyl bromide and glucose were dissolved in ethanol solution to form a precursor solution. In the obtained precursor solution, the concentration of benzyl bromide was 0.01 mmol / L, and the concentration of glucose was 0.1 mmol / mL.
[0046] Afterwards, the precursor solution was transferred to a polytetrafluoroethylene reactor with a capacity of 20 mL, and heated at a high temperature of 180 °C for 48 h to obtain a reaction product.
[0047] Then, filter the reaction product through an organic microporous filter membrane with a pore size of 0.45 μm to obtain the filtrate, then use a 14000 Da dialysis bag to dialyze the filtrate for 3 days to obtain a dialysate, and...
Embodiment 2
[0051] First, 10 mmol of benzyl bromide and 50 mmol of glucose were obtained, and 30 mL of ethanol was obtained as a solvent.
[0052] Then, 10 mmol of benzyl bromide and 50 mmol of glucose were mixed with 30 mL of ethanol, and dissolved by ultrasonication for 10 min to form a precursor solution. The above-mentioned benzyl bromide and glucose were dissolved in ethanol solution to form a precursor solution. In the obtained precursor solution, the concentration of benzyl bromide was 0.03 mmol / L, and the concentration of glucose was 1.1 mmol / mL.
[0053] Afterwards, 10 mL of the precursor solution was transferred to a polytetrafluoroethylene reactor with a capacity of 20 mL without transferring all of it, and heated at 200 °C for 40 h to obtain a reaction product.
[0054] Then, filter the reaction product through an organic microporous filter membrane with a pore size of 0.22 μm to obtain the filtrate, and then use an 800 Da dialysis bag to dialyze the filtrate for 5 days to ob...
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