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Preparation method of stannic oxide/silica composite nano-particle

A composite nanoparticle and silicon dioxide technology, applied in the directions of silicon dioxide, tin oxide, silicon oxide, etc., can solve the problems of complex preparation process, harsh reaction conditions, introduction of impurities, etc., and achieve simple equipment process, good crystallinity, short cycle effect

Active Publication Date: 2012-06-27
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the synthesis methods of the three-dimensional composite structure of tin dioxide are mainly hydrothermal method, template method, layer-by-layer growth method, etc. The above-mentioned methods often have complex preparation processes, harsh reaction conditions, high energy consumption, low yield, and the introduction of impurities, etc. question

Method used

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  • Preparation method of stannic oxide/silica composite nano-particle
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  • Preparation method of stannic oxide/silica composite nano-particle

Examples

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Embodiment 1

[0026] Dissolve crystalline tin tetrachloride / ethyl orthosilicate in a mixed solvent of water and ethanol to prepare a precursor solution; use a syringe pump to feed the precursor solution into a combustion reactor for hydrolysis reaction at a reaction temperature of 1500°C. Spherical silica particles are first formed in the flame, and then tin dioxide nucleates heterogeneously on its surface and grows in orientation, finally forming a nanocomposite structure of tin dioxide / silicon dioxide with a sea urchin-like structure.

[0027] Wherein: the volume ratio of water and ethanol is 1:5, the total concentration of tin source and silicon source in the mixed solvent is 0.5mol / L, and the molar ratio of tin source and silicon source is 1:1.

[0028] The feed rate of the precursor solution was 3ml / min, and the flow rate of oxygen was 0.3m 3 / h, the shear pressure is 0.15MPa.

[0029] Such as Figure 1~4 As shown, the prepared tin dioxide / silicon dioxide composite nanoparticles have...

Embodiment 2

[0031] The mixed solvent of stannous chloride / dichlorodimethylsilane dissolved in water and ethanol will be prepared as a precursor solution; the precursor solution will be passed into the combustion reactor with a syringe pump for hydrolysis reaction, and the reaction temperature is 2000°C . Spherical silica particles are first formed in the flame, then tin dioxide nucleates heterogeneously on its surface and grows in orientation, finally forming a nanocomposite structure of tin dioxide / silicon dioxide with a sea urchin-like structure.

[0032] Wherein: the volume ratio of water and ethanol is 1:11, the total concentration of tin source and silicon source in the mixed solvent is 1mol / L, and the molar ratio of tin source and silicon source is 2:1.

[0033] The feed rate of the precursor solution was 4ml / min, and the flow rate of oxygen was 0.6m 3 / h, the shear pressure is 0.22MPa.

[0034] The prepared tin dioxide / silicon dioxide composite nanoparticles have a sea urchin-lik...

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Abstract

The invention discloses a preparation method of a stannic oxide / silica composite nano-particle. The stannic oxide / silica composite nano-particle has a sea urchin-shaped structure. The preparation method provided by the invention comprises the following steps that one or more silicon sources and one or more tin sources are dissolved into a mixed solvent of water and ethanol so that a precursor solution is obtained; and the precursor solution is fed into a burning reactor by an injection pump and then undergoes a hydrolysis reaction at a reaction temperature of 1500 to 2000 DEG C, wherein spherical silica particles are produced in a fire and then heterogeneous nucleation and oriented growth of stannic oxide on the surfaces of the spherical silica particles are carried out so that the stannic oxide / silica composite nano-particles having sea urchin-shaped structures are obtained finally. The preparation method provided by the invention adopts simple equipment, can be realized easily and is conducive to realization of industrial continuous preparation.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and in particular relates to a preparation method of tin dioxide / silicon dioxide composite nanoparticles with sea urchin-like knots. Background technique [0002] Semiconductor oxide nanomaterials have unique optical and electrical properties, and are widely used in laser devices, nanoelectronics, nanophotonics and other fields. In order to obtain unique properties, semiconductor oxide nanomaterials are prepared into various shapes, such as nanotubes, nanorods, nanowires, nanobelts, nanospheres, nanocubes, etc. However, these structures and properties are single, and each has certain defects, which limit the application of semiconductor materials. Therefore, one of the current research hotspots is to combine these structures with each other to form new three-dimensional structures for better performance. [0003] Tin dioxide is an n-type semiconductor oxide material with e...

Claims

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Application Information

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IPC IPC(8): C01B33/12C01G19/02B82Y30/00B82Y40/00
Inventor 李春忠吴志文宁靖卫胡彦杰
Owner EAST CHINA UNIV OF SCI & TECH
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