Preparation method of molybdenum disulfide quantum dots with high fluorescence intensity
A molybdenum disulfide and fluorescence intensity technology, applied in the fields of chemistry, biological imaging and crystal, fluorescence detection, can solve the problems of inability to efficiently produce molybdenum disulfide quantum dots, low fluorescence intensity, low yield, etc., and achieve high yield , the effect of high fluorescence intensity and narrow particle size distribution
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Embodiment 1
[0097] A method for preparing molybdenum disulfide quantum dots with high fluorescence intensity, the experimental process after optimizing conditions, comprises the following steps:
[0098] (1) Put 0.1250g of sodium molybdate in a beaker, add 10ml of double distilled water to dissolve, and ultrasonicate for 5min;
[0099] (2) Add 0.4375g of glutathione and 10ml of water to dissolve, sonicate for 10min, and adjust the pH to 7;
[0100] (3) Transfer the uniformly mixed solution to a 50ml reaction kettle, and put it into a constant temperature oven at 200°C for 30h;
[0101] (4) Take it out, cool it to room temperature, and set the volume to 35ml; centrifuge at 12000r / min for 40min to obtain a yellow supernatant, which is the molybdenum disulfide quantum dot solution; store it in a refrigerator at 4°C for later use.
[0102] like Figure 1-Figure 4 The molybdenum disulfide quantum dots obtained in Example 1 have a high fluorescence value, can be stored at low temperature, and...
Embodiment 2
[0104] An optimized molybdenum disulfide quantum dot with high fluorescence intensity is tested for its stability as follows:
[0105] (1) After the molybdenum disulfide quantum dot solution prepared after optimization is irradiated with the molybdenum disulfide quantum dot solution with an ultraviolet lamp at a time period of 0h, 2h, 4h, 8h, 12h, 24h, 36h, and 48h, measure the fluorescence value, to judge the light stability;
[0106] (2) Measure the fluorescence value of the molybdenum disulfide quantum dot solution prepared after optimization in the time periods of 0h, 2h, 4h, 8h, 12h, 24h, 36h, and 48h, and judge the time stability;
[0107](3) The molybdenum disulfide quantum dot solution prepared after optimization is respectively at 0°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C Under certain conditions, measure the fluorescence value and judge the temperature stability;
[0108] (4) Mix the optimized molybdenum disulfide quantum dot solution with the BR s...
Embodiment 3
[0111] A high fluorescence intensity molybdenum disulfide quantum dot orthogonal experiment, comprising the following steps:
[0112] (1) Dissolve 0.1250g of sodium molybdate in 10ml of double distilled water, and ultrasonicate for 5 minutes; respectively add 0.3125g, 0.3750g, 0.4375g, 0.5000g of glutathione and 10ml of double distilled water according to the corresponding ratio, and ultrasonicate 10min;
[0113] (2) Use 1-2mol / L HCL and 2-4mol / L NaOH to adjust to PH = 3, PH = 5, PH = 7, PH = 9, transfer the solution to a 50ml reaction kettle, and place them at 160°C respectively , 180 ℃, 200 ℃, 220 ℃ oven, reaction 6h, 18h, 30h, 42h;
[0114] (3) Take it out at the corresponding time. After cooling to room temperature, the reaction solution is centrifuged at 12000r / min for 40min to obtain a yellow supernatant, which is an aqueous solution of molybdenum disulfide quantum dots.
[0115] As shown in Table 2, the molybdenum disulfide quantum dots obtained in this example are re...
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