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Method for fast preparing hollow porous silicon dioxide/silver nanoparticle composite and product

A technology of porous silica and composite materials, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. Cumbersome and other problems, to achieve the effect of obvious antibacterial ability, clear and concise reaction principle, and simple process

Inactive Publication Date: 2015-03-25
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of this study is to solve the problems of cumbersome preparation process of hollow porous silica / silver nanocomposites, uncontrollable particle size of composite materials, high cost of time and raw materials, and great environmental pollution, and provide a hollow porous silica Silicon / silver nanocomposite methods

Method used

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  • Method for fast preparing hollow porous silicon dioxide/silver nanoparticle composite and product
  • Method for fast preparing hollow porous silicon dioxide/silver nanoparticle composite and product
  • Method for fast preparing hollow porous silicon dioxide/silver nanoparticle composite and product

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Dissolve 1.7100 g of glucose in 100 mL of distilled water, add 0.4 mL of sodium silicate solution with a silicon dioxide concentration of 20%, and place it in a high-pressure hydrothermal kettle for 24 h at 180 °C after mixing thoroughly. The resulting solution was washed with distilled water several times, centrifuged at 6000 r for 10 min and filtered. After multiple washes, dry overnight at 80°C under vacuum. The obtained product was heated at 4°C min -1 Calcination at 600 °C for 6 h at a heating rate of 6 h to remove carbon nuclei to generate hollow porous nano-silica particles. Disperse it well to 200 mL 4.0×10 -4 g·mL -1 Add 2.5 mL of 0.1 M hydrazine hydrate to the cetyltrimethylammonium bromide aqueous solution, mix well, and add 5 mL of 0.05 M dilute silver nitrate solution dropwise under the condition of magnetic stirring at a speed of 300 r, and continue the reaction for 5 min . The obtained product was washed, centrifuged at 2000 r for 5 min and filtered...

Embodiment 2

[0031] Dissolve 1.7100 g of glucose in 100 mL of distilled water, add 0.4 mL of sodium silicate solution with a silicon dioxide concentration of 20%, and place it in a high-pressure hydrothermal kettle for 24 h at 180 °C after mixing thoroughly. The resulting solution was washed with distilled water, centrifuged at 6000 r for 10 min and filtered. After multiple washes, dry overnight at 80°C under vacuum. The obtained product was heated at 4°C min -1 Calcination at 500 °C for 4 h at a heating rate of 500 °C to remove carbon nuclei to generate hollow porous nano-silica particles. The resulting product was fully dispersed to 200 mL 3.5×10 -4 g·mL -1 Add 3.0 mL of 0.1 M hydrazine hydrate to the cetyltrimethylammonium bromide aqueous solution, mix well, and add 5 mL of 0.05 M dilute silver nitrate solution dropwise under the condition of magnetic stirring at a speed of 300 r, and continue the reaction for 10 min . The obtained product was washed, centrifuged at 2000 r for 5 m...

Embodiment 3

[0033] Dissolve 1.3680 g of glucose in 100 mL of distilled water, add 0.4 mL of sodium silicate solution with a silicon dioxide concentration of 20%, mix well, place in a high-pressure hydrothermal kettle and continue heating at 180 °C for 24 h. The resulting solution was washed with distilled water several times, centrifuged at 6000 r for 10 min and filtered. After multiple washes, dry overnight at 80°C under vacuum. The obtained product was heated at 4°C min -1 Calcined at 550 °C for 4 h at a heating rate of 550 °C to remove carbon nuclei to generate hollow porous nano-silica particles. The resulting product was fully dispersed to 200 mL 4.0×10 -4 g·mL -1 Add 2.5 mL of 0.1 M hydrazine hydrate to the cetyltrimethylammonium bromide aqueous solution, mix well, and add 5 mL of 0.05 M dilute silver nitrate solution drop by drop under the condition of rotating speed of 300 r, and continue the reaction for 15 min . The obtained product was washed, centrifuged at 2000 r for 5 m...

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Abstract

The invention relates to a method for fast preparing a hollow porous silicon dioxide / silver nanoparticle composite. The method includes the steps that a glucose water solution and a sodium silicate solution are mixed and then placed in a high-pressure hydrothermal kettle for a sustained reaction to obtain a carbonaceous ball silicon dioxide shell composite reactant, the reactant is centrifugally dried and then calcined in air for 3-8 h, and carbon nuclei are removed to obtain hollow porous silicon dioxide nanoparticles; the obtained silicon dioxide particles are fully dispersed in a mixed solution of a cetyl trimethyl ammonium bromide (CTAB) water solution and hydrazine hydrate, a dilute silver nitrate solution is added drop by drop, the mixture is stirred magnetically for a sustained reaction, and the obtained product is centrifugally separated to obtain the hollow porous silicon dioxide / silver nanoparticle material. The simple two-step method including a one-step hydrothermal method and a one-step reduction method is used for preparing hollow porous silicon dioxide / silver nanoparticles, and the hollow porous silicon dioxide nanoparticles are prepared through the one-step hydrothermal method, and the particle size of the hollow porous silicon dioxide nanoparticles can be adjusted conveniently; silver is reduced through the one-step reduction method, the preparation technology is simple, the reaction is fast, and large-scale industrial production can be achieved.

Description

technical field [0001] The invention belongs to the field of inorganic nonmetal / metal composite materials, and relates to a hollow porous silicon dioxide / silver nano composite material and a preparation method thereof. Background technique [0002] Hollow silica nanoparticles (HSNPS) have attracted much attention due to their hydrophilic properties, easy formation of colloidal suspensions, and surface functionality on both inner and outer walls. Hollow silica carbon nanoparticles have high chemical and thermal stability and low density, large surface area, good air permeability, permeability and good compatibility with other materials (Junjie Yuan, Xiong Zhang, He Qian , A novel approach to fabrication of superparamagnetite hollow silica / magnetic composite spheres. Journal of Magnetism and Magnetic Materials, 2010, 322: 2172-2176). It has great application potential in many fields such as selective separation, catalysis, and dielectric materials. Many chemical and physical...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
Inventor 欧宝立李政峰何聪刘俊成
Owner HUNAN UNIV OF SCI & TECH
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