β-leadous oxide quantum dot and its preparation method, photodetector and its preparation method
A photodetector, lead oxide technology, applied in chemical instruments and methods, material electrochemical variables, luminescent materials, etc., can solve the problems of environmental stability restricting the use value of black phosphorus nanodevices, and achieve excellent photoelectric detection performance, The preparation method is simple and easy to operate, and the photoelectric detection performance and stability are breakthrough effects
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[0036] figure 1 It is a schematic diagram of the preparation method of β-leadous oxide quantum dots in one embodiment of the present invention; please refer to figure 1 , the second aspect of the present invention provides a kind of preparation method of β-leadous oxide quantum dot, comprises the following steps:
[0037] The β-leadous oxide powder (ie figure 1 β-PbO in bulk) was added to the solvent, and the probe was sonicated for 4-8h in an ice bath and inert atmosphere; after the sonication of the probe was completed, continue to sonicate for 12-72h in a water bath, and the temperature of the water bath was kept at 5-20°C Within the range; after ultrasonication, centrifugation and vacuum drying are performed to obtain β-leadous oxide quantum dots, the size of the β-leadous oxide quantum dots is less than or equal to 20nm.
[0038] In the embodiment of the present invention, the β-leadous oxide powder can be purchased directly.
[0039] In the embodiment of the present i...
Embodiment 1
[0078] A preparation method of β-leadous oxide quantum dots (β-PbO QDs), the preparation process can be found in figure 1 , including the following steps:
[0079] (1) if figure 1 As shown, 400mg of β-PbO powder was added to 300mL of N-methylpyrrolidone (NMP) alkaline solution (pH = 14), and the probe was ultrasonicated for 8 hours under an ice-bath nitrogen atmosphere, and the ultrasonic power was 300W. Then the water bath was ultrasonicated for 72 hours, the ultrasonic power of the water bath was 500W, and the temperature of the water bath was kept constant at 10°C;
[0080] (2) β-PbO QDs were collected by centrifugation after sonication. The centrifugation operation includes: first adopting a centrifugation rate of 9000 rpm for 40 minutes, and taking the supernatant; then continuing to centrifuge the supernatant at a centrifugation rate of 18000 rpm for 40 minutes to obtain a precipitate. The obtained precipitates were vacuum-dried to obtain β-PbO QDs.
[0081] figure...
Embodiment 2
[0084] A preparation method of β-leadous oxide quantum dots (β-PbO QDs), comprising the following steps:
[0085] (1) Add 400 mg of β-PbO powder into 300 mL of N,N-dimethylformamide (DMF) alkaline solution (pH=14), and ultrasonicate the probe for 6 hours under an ice-bath nitrogen atmosphere, and the ultrasonic power is 200W. Then the water bath was ultrasonicated for 48 hours, the ultrasonic power of the water bath was 400W, and the temperature of the water bath was kept constant at 10°C;
[0086] (2) β-PbO QDs were collected by centrifugation after sonication. The centrifugation operation includes: first adopting a centrifugation rate of 8000 rpm for 30 minutes, and taking the supernatant; then continuing to centrifuge the supernatant at a centrifugation rate of 18000 rpm for 30 minutes to obtain a precipitate. The obtained precipitates were vacuum-dried to obtain β-PbO QDs.
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