Hollow silicon dioxide sub-microsphere with nanoscale precious metal and silicon dioxide kernel and preparation method thereof

A silica ball and silica technology, which is applied in the preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, nanostructure manufacturing, etc. problems, to achieve the effect of simple operation, easy industrialized large-scale production, and preventing agglomeration

Inactive Publication Date: 2011-09-28
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This template method can well control the size of the core, the size of the cavity and the thickness of the shell, but the steps are very cumbersome, and it is not easy to mass-produce industrially

Method used

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  • Hollow silicon dioxide sub-microsphere with nanoscale precious metal and silicon dioxide kernel and preparation method thereof
  • Hollow silicon dioxide sub-microsphere with nanoscale precious metal and silicon dioxide kernel and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Hollow silica submicron spheres with silica cores can be prepared with reference to patent application number 200610089184.9:

[0030] Step 1: Prepare hybrid silica submicron spheres by sol-gel method.

[0031] Prepare 160 parts by volume of ammonia water mixed solution with a mixed solvent of methanol and acetonitrile (volume ratio is 1: 1), so that the molar concentration of ammonia water in the mixed solution is 1.2mol / L; prepare 25 parts by volume of methanol solution of methyl orthosilicate , so that the molar concentration of methyl orthosilicate in methanol solution of methyl orthosilicate is 0.05mol / L; prepare 10 parts by volume of methanol solution of trimethoxysilylpropyl ethylenediamine, make trimethoxysilylpropylethylenediamine The molar concentration of the amine in the methanol solution of trimethoxysilylpropylethylenediamine is 1×10 -3 mol / L; based on the volume of methanol solution of methyl orthosilicate.

[0032] Add 12 parts by volume of methanol so...

Embodiment 2

[0046] Hollow silica submicron spheres with silica cores can be prepared with reference to patent application number 200610089184.9:

[0047] Step 1: Prepare hybrid silica submicron spheres by sol-gel method.

[0048] Prepare 200 parts by volume of ammonia water mixed solution with the mixed solvent of acetone and propanol (volume ratio is 2: 1), make the molar concentration of ammonia water in the mixed solution be 6.5mol / L; Prepare orthosilicate ethyl ester and orthopropyl silicate 40 parts by volume of propanol mixed solution, so that the molar concentration of ethyl orthosilicate and propyl orthosilicate in the propanol mixed solution of ethyl orthosilicate and propyl orthosilicate respectively is 1.8mol / L; prepare aniline 20 parts by volume of the propanol solution of methyltriethoxysilane, so that the molar concentration of anilinomethyltriethoxysilane in the propanol solution of anilinomethyltriethoxysilane is 1.5×10-3mol / L; The volume part of the propanol mixed soluti...

Embodiment 3

[0057] Hollow silica submicron spheres with silica cores can be prepared with reference to patent application number 200610089184.9:

[0058]Step 1: Prepare hybrid silica submicron spheres by sol-gel method.

[0059] Prepare 80 parts by volume of ethanol solution of ammonia water, so that the molar concentration of ammonia water in the ethanol solution of ammonia water is 0.05mol / L; prepare 20 parts by volume of ethanol solution of ethyl orthosilicate, make ethyl orthosilicate The molar concentration in the ethanol solution of ester is 0.1mol / L; Prepare 5 parts by volume of ethanol solution of trimethoxysilylpropylethylenediamine, make trimethoxysilylpropylethylenediamine in the ethanol of trimethoxysilylpropylethylenediamine The molar concentration in the solution is 7×10 -4 mol / L; based on the parts by volume of the ethanol solution of ethyl orthosilicate.

[0060] Add 5 parts by volume of ethanol solution of tetraethyl orthosilicate dropwise to the ethanol solution of amm...

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Abstract

The invention relates to a hollow silicon dioxide sub-microsphere with nanoscale precious metal and a silicon dioxide kernel and a preparation method thereof. In the invention, the hollow silicon dioxide sub-microsphere with the silicon dioxide kernel is soaked with an alkaline solution and is then added in various precious metal precursor solutions with certain concentrations; the mixture is heated and reduced to obtain a movable spherical silicon dioxide kernel which is positioned in the hollow silicon dioxide sub-microsphere and simultaneously has particle size of 20-600nm as well as a precious metal particle kernel with the particle size of 2-100nm; the diameter range of the hollow silicon dioxide sub-microsphere is 50-1000nm; the thickness of the casing is 5-100nm; a casing layer hasa mesoporous structure; the average pore size of a mesopore is 1-10nm; and the specific surface area of the sub-microsphere is 110-500m<2> / g.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and relates to hollow silicon dioxide submicron spheres with nanoscale noble metals and silicon dioxide cores and a preparation method thereof, in particular to nanoscale precious metals such as gold, silver, platinum and palladium and silicon dioxide cores hollow silica submicron spheres. Background technique [0002] In recent years, nanoscale noble metals have attracted extensive attention in catalysis, optical imaging, etc.; however, due to the high surface energy of nanoparticles, they are easy to agglomerate during the reaction process, thus losing their original activity and selectivity. Therefore, many chemists and material scientists are very eager to prepare nanocomposites with large surface area while maintaining high stability. Protecting nanoscale noble metals in porous hollow spheres provides an idea to solve this problem. Hollow spheres with nanoscale noble metal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00B01J23/52B01J23/50B01J23/44B01J23/42B01J21/08C07C209/36C07C211/51C07C213/02C07C215/76
Inventor 唐芳琼谭龙飞陈东刘惠玉
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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