Method for preparing spherical Sm2O3 semiconductor nanocrystals by means of complex hydrothermal method
A hydrothermal and semiconductor technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of easy powder agglomeration process cycle, low utilization rate of raw materials, nanocrystal agglomeration, etc., to avoid the introduction of impurities and Structural defects, strong uptake, fully developed effects
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[0019] Example 1:
[0020] 1) Will analyze pure SmCl 3 ·6H 2 O is added to deionized water and stirred with a magnetic stirrer to prepare Sm 3+ Solution A with a concentration of 0.1mol / L;
[0021] 2) Heat and stir Solution A at 35°C and adjust the pH of Solution A to 6 with a concentration of 1mol / L NaOH solution to form a precursor solution; then add trisodium citrate to the precursor solution, the amount of which is the theoretical yield of the product The ratio of the amount of the substance is n=0.2; the pH value of the precursor solution is again determined to be 6;
[0022] 3) Pour the precursor solution into the hydrothermal kettle, control the filling degree at 50%, then seal the hydrothermal kettle, and put it into the DHG-9075A electric heating blast drying box, control the water heating temperature to 140℃, and the pressure 8MPa, react for 48 hours, cool to room temperature naturally after the reaction;
[0023] 4) Open the hydrothermal kettle, take out the product, wash ...
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[0024] Example 2:
[0025] 1) Will analyze pure SmCl 3 ·6H 2 O is added to deionized water and stirred with a magnetic stirrer to prepare Sm 3+ Solution A with a concentration of 0.5mol / L;
[0026] 2) Heat and stir Solution A at 45°C and adjust the pH of Solution A to 7 with a concentration of 2mol / L NaOH solution to form a precursor solution; then add trisodium citrate to the precursor solution, the amount of which is the theoretical yield of the product The ratio of the amount of the substance is n=1; again determine the pH value of the precursor solution to 7;
[0027] 3) Pour the precursor solution into the hydrothermal kettle, control the filling degree at 55%, then seal the hydrothermal kettle, and put it into the DHG-9075A electric heating blast drying box, and control the water heating temperature to 200℃ and pressure 15MPa, react for 60 hours, and cool to room temperature naturally after the reaction;
[0028] 4) Open the hydrothermal kettle, take out the product, wash with ...
Example Embodiment
[0029] Example 3:
[0030] 1) Will analyze pure SmCl 3 ·6H 2 O is added to deionized water and stirred with a magnetic stirrer to prepare Sm 3+ Solution A with a concentration of 1.5mol / L;
[0031] 2) Heat and stir Solution A at 40℃, adjust the pH of Solution A to 8 with 3.5mol / L NaOH solution to form a precursor solution; then add trisodium citrate to the precursor solution, the amount of which is the same as the product theory The ratio of the amount of the produced substance is n=0.6; again determine the pH value of the precursor solution to 8;
[0032] 3) Pour the precursor solution into the hydrothermal kettle, control the filling degree at 60%, then seal the hydrothermal kettle, put it into the DHG-9075A electric heating blast drying oven, control the water heating temperature to 160℃, pressure 20MPa, react for 72 hours, cool to room temperature naturally after the reaction;
[0033] 4) Open the hydrothermal kettle, take out the product, wash with deionized water and centrifuge...
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