Quantum dot and preparation method thereof
A technology of quantum dots and cations, applied in the field of quantum dots and their preparation, can solve the problems of insufficient liquid-liquid two-phase method, and achieve the effect of cost saving
Active Publication Date: 2017-02-15
TCL CORPORATION
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Problems solved by technology
[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a quantum dot and its preparation method, aiming to solve the problem of deficiencies in the liquid-liquid two-phase method in the prior art
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Embodiment 1
[0029] combine figure 1 As shown, the preparation steps of quantum dots are as follows:
[0030] (1) Sodium citrate fiber membrane was prepared by electrospinning
[0031]Dissolve 3 g of sodium citrate in 10 mL of distilled water, add 3 wt % dimethyl ethyl sulfone as a co-solvent, add 2.4 g of polystyrene, and then stir at 60 ° C for 3 h to obtain a homogeneous solution. The solution was injected into a 10 mL syringe, and the syringe used a stainless steel needle with an inner diameter of 0.4 mm as the solution injection end. A 4cm×5cm copper mesh was used as the collector, the distance from the injection needle to the copper mesh was 12cm, and a UV lamp with a power of 100W was used in the middle to irradiate. The injection speed of the solution was 1.2mL / h, and the high-voltage power supply was 18kV. After the whole spinning process continued for 4 hours, a nano-scale sodium citrate fiber membrane with a certain thickness was obtained, and the sodium citrate fiber membran...
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The invention discloses a quantum dot and a preparation method thereof. The preparation method comprises the following steps of firstly, preparing a solid fibrous film; then, putting the prepared solid fibrous film into a cation precursor solution to crosslink; injecting an anion precursor into the crosslinked solid fibrous film to react, so as to obtain the quantum dot, wherein the size of the solid fibrous film is nanometer or micrometer level. The quantum dot has the advantages that by using the solid nanometer fiber as a micro-reactor, the reaction temperature is lower, and the quantum dot can quickly nucleate and grow at a solid-liquid interface; the size of the quantum dot can be adjusted by controlling the size of the solid fibrous film or the reaction temperature; the solid nanometer fibrous film which is used as the micro-reactor can be repeatedly used, so that the cost is greatly reduced. The preparation method has the advantages that the operation is simple, the repeating is easy, and the preparation method can be used for preparation.
Description
technical field [0001] The invention relates to the field of quantum dot synthesis, in particular to a quantum dot and a preparation method thereof. Background technique [0002] In recent years, researchers have extensively studied the optical properties of colloidal quantum dots due to their enormous applications in biosensing, biolabeling, and light-emitting diodes. Due to the requirements on the structure and performance of luminescent quantum dots, their controllable synthesis has become an attractive research field. [0003] In the synthesis of luminescent quantum dots, researchers have developed a variety of preparation methods, such as metal-organic precursor method, solvothermal method, aqueous phase synthesis method, ion beam synthesis method, ultrasonic radiation method, thermal injection method, chemical water bath deposition method , microwave-assisted chemical water bath deposition method and solvent growth method, etc. The most widely used preparation method...
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Login to View More IPC IPC(8): C09K11/56C09K11/88C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/565C09K11/661C09K11/88C09K11/881C09K11/883
Inventor 覃辉军杨一行
Owner TCL CORPORATION