Preparation method for yolk-eggshell-type organic-inorganic hybrid silicon oxide nanosphere

A technology of eggshell type and silicon oxide, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve complex process, difficult composition adjustment, and poor universal application and other problems, to achieve the effect of short time consumption, few steps and high storage capacity

Inactive Publication Date: 2012-10-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Our method can effectively overcome the shortcomings of the existing preparation technology, such a

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  • Preparation method for yolk-eggshell-type organic-inorganic hybrid silicon oxide nanosphere
  • Preparation method for yolk-eggshell-type organic-inorganic hybrid silicon oxide nanosphere
  • Preparation method for yolk-eggshell-type organic-inorganic hybrid silicon oxide nanosphere

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Embodiment 1

[0039] Under stirring at room temperature, dissolve 0.1 g CTAB in 10 mL deionized water, add 1 mL (10 mg mL -1 ) oleic acid-stabilized Fe dissolved in chloroform 3 o 4 Nanoparticle solution (Journal of Materials Chemistry2009, Vol. 19, No. 1811-1815), stirred for 0.5 h to form a uniform O / W emulsion, and heated to 60 o C. Chloroform was evaporated under stirring conditions to form a brown transparent solution, and 38 mL of water and 0.35 mL of NaOH (2 M) were added in sequence, and the temperature was raised to 80 oC , add 0.68 mL of TEOS, a few minutes later precipitation appeared, at 80 o Stir at C for 2 h, add 60 mL of water, add 0.36 mL of BTME (dissolved in 2 mL of ethanol) after the temperature is stable, and continue at 80 oC Stir for 1 h. After the product was filtered, washed with water and dried, it was dissolved in absolute ethanol solution with ammonium nitrate at 60 o C and stirred for 0.5 h, the product was filtered, washed with water, and dried to obtain ...

Embodiment 2

[0042] The preparation process of Example 1 was adopted, except that BTEB was added as a silicon source, and the stirring time was 3 h. A light brown-yellow powder was obtained. The representation method is the same as above. The TEM result shows that the obtained product is a nanoparticle with egg yolk-eggshell type, uniform particle size and good dispersion; the overall size of the eggyolk-eggshell type nanoparticle is 100 nm, and the wall thickness is 10nm ( image 3 ).

[0043]

Embodiment 3

[0045] The preparation process of Example 1 was adopted, except that APTES was added as a silicon source, and the stirring time was 5 h. A light brown-yellow powder was obtained. The representation method is the same as above. TEM results show that the obtained product is a nanoparticle with egg yolk-eggshell type, with uniform particle size and good dispersion; the overall size of the egg yolk-eggshell type nanoparticle is 120 nm, and the wall thickness is 13 nm ( Figure 4 ).

[0046]

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Abstract

The invention relates to silicon oxide sphere particles, concretely to a preparation method for organic-inorganic hybrid silicon oxide nanospheres with a structure of yolk-eggshell. The invention provides a yolk-eggshell-type organic-inorganic hybrid silicon oxide or a carbon-silicon composite nano-material with adjustable particle size, adjustable core-shell composition and hierarchical pore structure, and the preparation method thereof. In an alkaline system, nanometer silicon oxide spheres with core-shell structures are composed by taking a cationic surfactant as a structure-directing agent. Organosilicon precursor is added to the system. After being stirred, filtered and dried, the organic-inorganic hybrid silicon oxide nanospheres with freely mobile cores and functionalized mesoporous shells are obtained.

Description

technical field [0001] The invention relates to organic-inorganic hybrid nanomaterials, in particular to a method for preparing organic-inorganic hybrid silicon oxide nanospheres with egg yolk-eggshell structure (that is, free-moving nanoparticles are loaded in the cavity). Background technique [0002] The egg yolk-eggshell nano-silica material with freely movable nanoparticles in the inner cavity has become the current field of nanomaterials due to its unique optical and electrical properties, as well as its potential application prospects in catalysis, biomedicine, and imaging. research hotspots. The main components of the shells of egg yolk-eggshell nanomaterials that have been prepared so far include: silicon oxide, organic polymers, metal oxides and carbon. Among them, silicon oxide has attracted extensive attention due to its large specific surface area, high storage capacity, good mechanical and thermal stability, cheap and easy to obtain, and good biocompat...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/50B01J23/52B01J23/42B01J23/44B01J23/46B01J23/89B01J35/10
Inventor 杨启华杨雁李晓波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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