Preparation method of magnetic fluorescent composite nanospheres
A technology of nanospheres and fluorescence, which is applied in the field of preparation of magnetic fluorescent composite nanospheres, can solve the problems of not being able to achieve magnetic maneuverability and strong fluorescence properties at the same time, affecting the quantum yield of quantum dots, and low saturation magnetization of materials, etc., to achieve Easy to operate, consistent thickness, and uniform particle size
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Embodiment 1
[0030] (1) Preparation of CdSe quantum dots
[0031] First is Na 2 SeSO 3 Preparation of precursor solution, 5mmolNa 2 SO 3 , 0.5mmol selenium powder and 100mL deionized water were added into a 250mL three-neck flask, and the pH was adjusted to 9 with 1mol / L NaOH aqueous solution. In rapid stirring and passing N 2 Under the conditions, the temperature was raised to 100°C. As the reaction time prolongs, the color of the solution gradually changes from gray-black to colorless, clear and transparent, indicating that the selenium powder has been completely dissolved.
[0032] Cd 2+ Preparation of precursor solution: Add 3 mL of deionized water, 1 mmol of cadmium acetate and 2.4 mmol of N-acetylcysteine powder into a test tube, and dissolve them by ultrasonic waves.
[0033] Cd that will be made 2+ The precursor solution was quickly added to the pre-prepared Na 2 SeSO 3 In the precursor solution, under rapid mechanical stirring and N 2 Under the condition of 100°C, the...
Embodiment 2
[0041] (1) Preparation of CdSe quantum dots
[0042] First is Na 2 SeSO 3 Preparation of precursor solution, 5mmolNa 2 SO 3 , 0.5mmol selenium powder and 100mL deionized water were added into a 250mL three-neck flask, and the pH was adjusted to 9 with 1mol / L NaOH aqueous solution. In rapid stirring and passing N 2 Under the conditions, the temperature was raised to 100°C. As the reaction time prolongs, the color of the solution gradually changes from gray-black to colorless, clear and transparent, indicating that the selenium powder has been completely dissolved.
[0043] Cd 2+ Preparation of precursor solution: Add 3 mL of deionized water, 1 mmol of cadmium acetate and 2.4 mmol of N-acetylcysteine powder into a test tube, and dissolve them by ultrasonic waves.
[0044] Cd that will be made 2+ The precursor solution was quickly added to the pre-prepared Na 2 SeSO 3 In the precursor solution, under rapid mechanical stirring and N 2 Under the condition of 100°C, the...
Embodiment 3
[0047] (1) Preparation of CdSe quantum dots
[0048] First is Na 2 SeSO 3 Preparation of precursor solution, 5mmolNa 2 SO 3 , 0.5mmol selenium powder and 100mL deionized water were added into a 250mL three-neck flask, and the pH was adjusted to 9 with 1mol / L NaOH aqueous solution. In rapid stirring and passing N 2 Under the conditions, the temperature was raised to 100°C. As the reaction time prolongs, the color of the solution gradually changes from gray-black to colorless, clear and transparent, indicating that the selenium powder has been completely dissolved.
[0049] Cd 2+ Preparation of precursor solution: Add 3 mL of deionized water, 1 mmol of cadmium acetate and 2.4 mmol of N-acetylcysteine powder into a test tube, and dissolve them by ultrasonic waves.
[0050] Cd that will be made 2+ The precursor solution was quickly added to the pre-prepared Na 2 SeSO 3 In the precursor solution, under rapid mechanical stirring and N 2 Under the condition of 100°C, the...
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