Hydrothermal synthesis method of carbon quantum dots from cotton
A technology of carbon quantum dots and raw material water, applied in the field of hydrothermal synthesis of carbon quantum dots, can solve the problems of many preparation steps and unsuitable for large-scale production, and achieve the effect of simple preparation process and wide sources
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[0022] Example 1
[0023] Step 1. Take 0.3g cotton and 400mg p-toluenesulfonic acid and add them to 25ml water;
[0024] Step 2: Hydrothermal reaction at 200°C for 5 hours;
[0025] Step 3, filter with 200μm cellulose filter membrane, and then dialyzed with 1000Da dialysis bag to obtain pure carbon quantum dots.
Example Embodiment
[0026] Example 2
[0027] Step 1. Take 0.3g cotton and 150mg p-toluenesulfonic acid and add them to 25ml water;
[0028] Step 2: Hydrothermal reaction at 200°C for 5h;
[0029] Step 3, filter with a 200μm cellulose filter membrane, and then dialyzed with a 1000Da dialysis bag to obtain pure carbon quantum dots.
Example Embodiment
[0030] Example 3
[0031] Step 1. Take 0.3g cotton and 60mg p-toluenesulfonic acid and add them to 25ml water;
[0032] Step 2: Hydrothermal reaction at 200°C for 5 hours;
[0033] Step 3, filter with a 200μm cellulose filter membrane, and then dialyzed with a 1000Da dialysis bag to obtain pure carbon quantum dots.
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