High-dispersity hollow anti-bell ringing type copper/silicon dioxide core-shell nanoparticle and preparation method thereof

A copper nanoparticle and silicon dioxide technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for material and surface science, can solve the problems of cumbersome and low material utilization, achieve low corrosiveness and simple methods The effect of rapid, readily available synthetic raw materials

Inactive Publication Date: 2016-11-02
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is usually cumbersome and requires the use of strong acids (hydrocyanic acid, hydrochloric acid, etc.), strong alkalis (sodium hydroxide, etc.) as corrosive agents
In addition, because the shell material is corroded, the material utilization rate is not high

Method used

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  • High-dispersity hollow anti-bell ringing type copper/silicon dioxide core-shell nanoparticle and preparation method thereof
  • High-dispersity hollow anti-bell ringing type copper/silicon dioxide core-shell nanoparticle and preparation method thereof
  • High-dispersity hollow anti-bell ringing type copper/silicon dioxide core-shell nanoparticle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh 0.8376g of copper acetylacetonate and add it to a 150mL round bottom flask with a magnet. An additional 14.2275 g of oleylamine was added. Under the protection of nitrogen, the temperature was gradually raised to 120°C and kept for 10 minutes to remove impurities such as water in the system. Then, when the temperature was raised to 200° C. at a heating rate of 20° C. / min, 1.4228 g of trioctylphosphine was added. Continue heating to 220°C and keep it for 2h, then cool down to room temperature under the protection of nitrogen. After adding 30mL ethanol solution, centrifuge. After repeated dispersion and centrifugation with hexanaphthene / ethanol mixed solution, obtain about 20nm copper nanoparticles ( figure 2 ). The XRD crystal phase diagram of copper nanoparticles is shown in image 3 shown.

[0030] (2) Use a pipette to take 150 mL of cyclohexane into a round bottom flask with a magnet, add 20 mL of Igepal CO-630 surfactant and 20 mL of the copper nanop...

Embodiment 2

[0033] (1) Weigh 0.8376g of copper acetylacetonate and add it to a 150mL round bottom flask with a magnet. An additional 14.2275 g of oleylamine was added. Under the protection of nitrogen, the temperature was gradually raised to 120°C and kept for 10 minutes to remove impurities such as water in the system. Then, when the temperature was raised to 220° C. at a heating rate of 20° C. / min, 1.4228 g of pentaoctylphosphine was added. Continue heating to 230°C and keep it for 2h, then cool down to room temperature under the protection of nitrogen. After adding 10 mL of ethanol solution, centrifuge. After repeated dispersion and centrifugation with a cyclohexane / ethanol mixed solution, copper nanoparticles with a diameter of about 12 nm were obtained.

[0034] (2) Use a pipette to take 150 mL of cyclohexane into a round bottom flask with a magnet, add 20 mL of Igepal CO-520 surfactant and 40 mL of the copper nanoparticle cyclohexane solution that has been synthesized in the firs...

Embodiment 3

[0037] (1) Weigh 0.8376g of copper acetylacetonate and add it to a 150mL round bottom flask with a magnet. An additional 14.2275 g of oleylamine was added. Under the protection of nitrogen, the temperature was gradually raised to 120°C and kept for 10 minutes to remove impurities such as water in the system. Then, when the temperature was raised to 200° C. at a heating rate of 20° C. / min, 1.4228 g of trioctylphosphine was added. Continue heating to 220°C and keep it for 2h, then cool down to room temperature under the protection of nitrogen. After adding 10 mL of ethanol solution, centrifuge. After repeated dispersion and centrifugation with cyclohexane / ethanol mixed solution, copper nanoparticles of about 20 nm were obtained.

[0038] (2) Use a pipette to take 150 mL of cyclohexane into a round bottom flask with a magnet, add 20 mL of Igepal CO-520 surfactant and 40 mL of the copper nanoparticle cyclohexane solution that has been synthesized in the first step, and stir for...

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Abstract

The invention belongs to the technical field of advanced nanocomposites, and particularly discloses a high-dispersity hollow anti-bell ringing type copper/silicon dioxide core-shell nanoparticle and a preparation method thereof. The preparation method comprises the following steps: synthesizing a copper nanoparticle with uniform morphology and size by adopting a high-temperature decomposition method; coating a layer of uniform silicon dioxide on the surface of the nanoparticle by using a cyclohexane/ammonia water reversed-phase micro-emulsion method so as to form a copper/silicon dioxide core-shell structure; and finally carrying out processing under an alkaline condition by utilizing a hydrothermal method so as to obtain the high-dispersity hollow anti-bell ringing type copper/silicon dioxide core-shell nanoparticle. The hollow anti-bell ringing type nanoparticle has the advantages of being high in copper metal dispersity, uniform in morphology and high in specific surface area, and has important application prospect in the fields of adsorptive separation and catalysis. According to a synthesis method provided by the invention, the control carried out on the specific surface area and copper dispersity of the hollow anti-bell ringing type core-shell nanoparticle can be realized. The synthesis raw materials are easy to get and the method is simple and rapid, so that large-batch synthesis can be realized.

Description

technical field [0001] The invention belongs to the field of advanced nanocomposite materials and technologies, and in particular relates to a hollow anti-rattle copper / silicon dioxide core-shell nanoparticle with high dispersion and a preparation method thereof. technical background [0002] In recent years, due to the ease of design of core-shell nanoparticles, including the selection of core-shell materials, the control of shell porosity and pore structure, and their broad application prospects in the fields of catalysis, medicine, environmental protection, and energy storage, core-shell nanoparticles Nanoparticles have aroused great interest of researchers at home and abroad. Among them, as a catalyst and adsorption material, it has a high dispersion of active metals and a hollow core-shell structure, which can allow reactants to pass through the core-shell material, increase the utilization rate of active metals, and improve mass transfer efficiency, thereby improving t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F1/02B22F9/24B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0655B22F1/054B22F1/16
Inventor 李自卫李敏陈丽军
Owner GUIZHOU INST OF TECH
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