A kind of Gd-doped cdte nanocrystal and its aqueous phase preparation method and application
A technology for the preparation of nanocrystals and aqueous phases, which is applied in the fields of nanotechnology, nanotechnology, and nanooptics for materials and surface science, and can solve problems such as cumbersome operation steps, and achieve simple and safe operation, low cost, and easy availability of raw materials. Effect
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Embodiment 1
[0035] (1) Preparation of precursor solution:
[0036] 4mmol CdCl 2 Dissolve the solid in a 100mL volumetric flask, and configure 40mmol·L -1 Cd 2+ Precursor solution, standby; 0.25mmol GdCl 3 Dissolve the solid in a 50mL volumetric flask and prepare 5mmol·L -1 Gd 3+ Precursor solution, spare.
[0037] (2) Preparation of sodium telluride hydride NaHTe solution:
[0038] Mix 1mmol Te powder and 2mmol NaBH 4 Add it into a 25mL three-neck round bottom flask, add 5mL of distilled water, protect it with nitrogen, and react at room temperature for about 3 hours to obtain a clear light purple NaHTe solution, which is set aside.
[0039] (3) Preparation of Gd-doped CdTe nanocrystals:
[0040] 2.5mL 40mmol·L -1 Cd 2+ Precursor solution, 0.4mL 5mmol·L -1 Gd 3+ The precursor solution and 21.0 μL MPA were sequentially added into a 250 mL three-neck round bottom flask, and then the mixture was diluted to 100 mL. Add 1 mol·L dropwise to the mixture -1 NaOH solution, adjust the...
Embodiment 2
[0043] (1) Preparation of precursor solution:
[0044] 40mmol·L -1 Cd 2+ Precursor solution and 5mmol L -1 Gd 3+ The configuration process of the precursor solution is the same as in Example 1.
[0045] (2) Preparation of sodium telluride hydride NaTe solution:
[0046] The preparation process of sodium telluride hydride NaTe solution is the same as that in Example 1.
[0047] (3) Preparation of Gd-doped CdTe nanocrystals:
[0048] 2.5mL 40mmol·L -1 Cd 2+ Precursor solution, 0.8mL 5mmol·L -1 Gd 3+ The precursor solution and 21.0 μL MPA were sequentially added into a 250 mL three-neck round bottom flask, and then the mixture was diluted to 100 mL. Add 1 mol·L dropwise to the mixture -1 NaOH solution, adjust the pH value of the mixture to the interval of 8.0-9.0. The mixture was then treated with N 2 Bubble for 30min to remove dissolved oxygen in the mixture. 500 μL of freshly prepared NaHTe solution was added to the nitrogen-saturated mixture. Then the obtained m...
Embodiment 3
[0051] (1) Preparation of precursor solution:
[0052] 40mmol·L -1 Cd 2+ Precursor solution and 5mmol L -1 Gd 3+ The configuration process of the precursor solution is the same as in Example 1.
[0053] (2) Preparation of sodium telluride hydride NaTe solution:
[0054] The preparation process of sodium telluride hydride NaTe solution is the same as that in Example 1.
[0055] (3) Preparation of Gd-doped CdTe nanocrystals:
[0056] 2.5mL 40mmol·L -1 Cd 2+ Precursor solution, 2.0mL 5mmol·L -1 Gd 3+ The precursor solution and 21.0 μL MPA were sequentially added into a 250 mL three-neck round bottom flask, and then the mixture was diluted to 100 mL. Add 1 mol·L dropwise to the mixture -1 NaOH solution, adjust the pH value of the mixture to the interval of 8.0-9.0. The mixture was then treated with N 2 Bubble for 30min to remove dissolved oxygen in the mixture. 500 μL of freshly prepared NaHTe solution was added to the nitrogen-saturated mixture. Then the obtained m...
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