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A kind of preparation method of zinc metastannate quantum dot

A technology of zinc metastannate and quantum dots, which is applied in the field of preparation of zinc metastannate quantum dots, can solve the problems of large particle size of reaction products, low catalytic efficiency, high toxicity of raw materials, etc., and achieve accelerated drying rate, large specific surface area, Effect of Catalytic Efficiency Improvement

Active Publication Date: 2022-06-03
HANGZHOU NORMAL UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

[0006] The present invention aims to overcome the disadvantages of high toxicity of raw materials and easy generation of foam, large particle size of reaction product and low catalytic efficiency in the preparation of existing zinc metastannate quantum dots, and provides a kind of zinc metastannate quantum dots. The preparation method avoids the use of highly toxic cetyltrimethylammonium bromide, and the average particle size of the prepared zinc metastannate quantum dots can reach below 10nm, has a large specific surface area and high catalytic efficiency

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  • A kind of preparation method of zinc metastannate quantum dot
  • A kind of preparation method of zinc metastannate quantum dot
  • A kind of preparation method of zinc metastannate quantum dot

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preparation example Construction

[0032] A preparation method of zinc metastannate quantum dots, characterized in that the preparation method comprises the following steps:

[0033] (1) Weigh 0.03-0.045g of zinc oxide, put it into a 100ml beaker, add 30ml of distilled water, and place it on a magnetic stirrer to keep stirring until it is completely dissolved to form the first solution;

[0034] (2) slowly adding potassium stannate and urea to the above-mentioned first solution according to a certain proportion to form a second solution, wherein the mass ratio of each component is zinc oxide: potassium stannate: urea is 3-5:10-15 :40-60;

[0035] (3) Put the above-mentioned second solution in a magnetic stirrer and stir at 200-500r / min for 30-40min to obtain a suspension, transfer the suspension to an autoclave, and then place it in an electrothermal constant temperature at 150-200°C The reaction was carried out in a blast drying oven for 6-8h, then taken out and cooled to room temperature, and a white precipi...

Embodiment 1

[0038] A preparation method of zinc metastannate quantum dots, characterized in that the preparation method comprises the following steps:

[0039] (1) Weigh 0.04g of zinc oxide, put it into a 100ml beaker, add 30ml of distilled water, and keep stirring on a magnetic stirrer until it is completely dissolved to form the first solution;

[0040] (2) slowly adding potassium stannate and urea to the above-mentioned first solution according to a certain proportion to form a second solution, wherein the mass ratio of each component is zinc oxide: potassium stannate: urea is 4:13:50;

[0041](3) The above-mentioned second solution was placed in a magnetic stirrer and stirred at 500 r / min for 35 min to obtain a suspension, the suspension was transferred to a high-pressure reactor, and then placed in a 150 ℃ electric heating constant temperature blast drying oven to react 7h, then take out and cool to room temperature, and obtain a white precipitate after filtration;

[0042] (4) The ...

Embodiment 2

[0046] A preparation method of zinc metastannate quantum dots, characterized in that the preparation method comprises the following steps:

[0047] (1) Weigh 0.045g of zinc oxide, put it into a 100ml beaker, add 30ml of distilled water, and place it on a magnetic stirrer to keep stirring until it is completely dissolved to form the first solution;

[0048] (2) slowly adding potassium stannate and urea to the above-mentioned first solution according to a certain proportion to form a second solution, wherein the mass ratio of each component is zinc oxide: potassium stannate: urea is 3:15:40;

[0049] (3) The above-mentioned second solution was placed in a magnetic stirrer and stirred at 200 r / min for 40 min to obtain a suspension, the suspension was transferred to a high-pressure reactor, and then placed in a 200 ℃ electric heating constant temperature blast drying oven to react 8h, then take out and cool to room temperature, and obtain a white precipitate after filtration;

[...

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Abstract

The invention relates to the field of functional nanomaterials, in particular to a method for preparing zinc metastannate quantum dots, comprising the following steps: (1) dissolving zinc oxide in distilled water to form a first solution; (2) dissolving potassium stannate Add urea and urea to the above-mentioned first solution to form a second solution; (3) Stir the above-mentioned second solution evenly, heat the reaction for 6-8 hours, and obtain a white precipitate after cooling and filtering; (4) Wash the collected white precipitate , centrifugal separation and drying to obtain a zinc metastannate quantum dot. The zinc metastannate quantum dots prepared by the present invention have an average particle diameter of up to 3-5nm, have a larger specific surface area, and greatly improve catalytic efficiency; while avoiding the use of highly toxic organic matter that is a surfactant, greatly increasing the The preparation is safe, and avoids the generation of a large amount of foam during the reaction process, increases the stability of the reaction, and the reaction steps are simple and easy to operate.

Description

technical field [0001] The invention relates to the field of functional nanomaterials, in particular to a method for preparing zinc metastannate quantum dots. Background technique [0002] The reason why the modern chemical industry is so developed and the energy source continuously produces chemical products that can meet people's needs is because of the extensive use of catalysts in the modern chemical industry. Generally speaking, the role of the catalyst can be summarized into three aspects: reducing the activation energy of the reaction, making the chemical reaction impossible thermodynamically possible; increasing the rate of the reaction, improving the kinetics of the reaction, so as to reduce the reaction temperature, The purpose of reducing the energy consumption of the reaction; reducing the reaction energy barrier of the target product and improving the selectivity of the target product. Generally speaking, the quality and structure of the catalyst itself do not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00B82Y40/00
CPCC01G19/00C01P2004/64C01P2004/04
Inventor 高鹏汪军
Owner HANGZHOU NORMAL UNIVERSITY
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