A kind of preparation method of mos2 quantum dot
A technology of quantum dots and samples, which is applied in the field of preparation of MoS2 quantum dots, to achieve the effects of reduced production costs, narrow particle size distribution, good chemical stability and thermal stability
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Embodiment 1
[0027] A kind of MoS 2 The preparation method of quantum dots is to prepare molybdenum sulfide powder with nanometer size by hydrothermal method; and to use DMF as solvent to prepare MoS by solvothermal reaction method 2 quantum dots. Concretely prepare according to the following steps:
[0028] 1) will contain 3g / L Na 2 MoO 4 2H 2 O and 6g / L C 2 h 5 The solution of NS was poured into the reaction kettle and reacted hydrothermally at 200°C for 24 hours. After the reaction was completed, it was cooled to room temperature and centrifuged at 10,000 r / min to wash the reaction samples (washed three times with water and alcohol). The washed samples were vacuum-dried at 60°C for 24 h and ground to obtain MoS 2 powder, ready to use.
[0029] 2) Take the MoS prepared in step 1) 2 Powder 0.1g, and 40ml DMF solvent were ultrasonically mixed at 200W for 12h to make MoS 2 The powder is uniformly dispersed in the polar solvent; put into the reactor for solvothermal reaction at 200...
Embodiment 2
[0036] A kind of MoS 2 The preparation method of quantum dots is specifically prepared according to the following steps:
[0037] 1) will contain 2g / L Na 2 MoO 4 2H 2 O and 4g / L C 2 h 5 The solution of NS was poured into the reaction kettle and reacted hydrothermally at 180°C for 30h. After the reaction was completed, it was cooled to room temperature and centrifuged at 10000r / min to wash the reaction samples (washed three times with water and alcohol). The washed samples were vacuum-dried at 60°C for 24 h and ground to obtain MoS 2 powder, ready to use.
[0038] 2) Take the MoS prepared in step 1) 20.1g of powder, and 40ml of DMF solvent were ultrasonically mixed at 200W for 12h; put into the reaction kettle for solvothermal reaction at 180°C for 10h, and the reaction kettle was cooled to room temperature and the liquid was taken out. Stand still for 24 hours, take 1 / 3 of the supernatant, centrifuge at 10,000r / min for 30 minutes, and then take 1 / 3 of the centrifuge fr...
Embodiment 3
[0040] A kind of MoS 2 The preparation method of quantum dots is specifically prepared according to the following steps:
[0041] 1) will contain 2g / L Na 2 MoO 4 2H 2 O and 6g / L C 2 h 5 The solution of NS was poured into the reaction kettle and reacted hydrothermally at 180°C for 30h. After the reaction was completed, it was cooled to room temperature and centrifuged at 10000r / min to wash the reaction samples (washed three times with water and alcohol). The washed samples were vacuum-dried at 60°C for 24 h and ground to obtain MoS 2 powder, ready to use.
[0042] 2) Take the MoS prepared in step 1) 2 0.1g of powder, and 40ml of DMF solvent were ultrasonically mixed at 200W for 12h; put into the reaction kettle for solvothermal reaction at 160°C for 10h, and the reaction kettle was cooled to room temperature and the liquid was taken out. Stand still for 24 hours, take 1 / 3 of the supernatant, centrifuge at 10,000r / min for 30 minutes, and then take 1 / 3 of the centrifuge f...
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