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Silicon dioxide/tin oxide composite nanoparticle with nuclear shell structure and preparation method thereof

A silicon dioxide, core-shell structure technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of complex preparation process, harsh reaction conditions, difficult to control morphology, etc., and achieve simple preparation process and production cost. The effect of low and wide extinction wavelength regulation range

Active Publication Date: 2009-12-30
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the common preparation methods of silica core-shell nanocomposite particles in the prior art include ultrasonic method, microemulsion method, layer-by-layer growth method, sol-gel method, etc. These methods often have harsh reaction conditions and complicated preparation processes. , poor repeatability, difficult to control morphology and the introduction of impurities

Method used

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  • Silicon dioxide/tin oxide composite nanoparticle with nuclear shell structure and preparation method thereof
  • Silicon dioxide/tin oxide composite nanoparticle with nuclear shell structure and preparation method thereof

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Embodiment 1

[0026] The preparation method of the silicon dioxide / tin oxide nanocomposite particles with core-shell structure in this embodiment, such as figure 1 As shown, the steps are as follows:

[0027] (1) Weigh 0.6g nano-SiO 2 Powder, 3.5gSnCl 4 .5H 2 O and 0.2 g of sodium dodecylbenzene sulfonate were dispersed in 100 ml of deionized water by ultrasonic dispersion for 30 min to obtain an emulsion. After the emulsion was stirred at 90°C for 15 minutes, 50ml of 1mol / L (NH 4 ) 2 CO 3 Solution, continue to react for 2h to obtain the precursor sol.

[0028] (2) After centrifugation, the precursor sol was washed once with deionized water and ethanol, and dried at 80°C for 12 hours to obtain the precursor powder.

[0029] (3) The obtained white precursor powder was calcined in a muffle furnace at a temperature of 600° C. for 2 hours to obtain pale yellow silica / tin oxide nanocomposite particles with a core-shell structure.

Embodiment 2

[0031] The difference between this embodiment and the first embodiment is: SnCl 4 .5H 2 The amount of O is 7.0g; the amount of sodium dodecylbenzenesulfonate is 0.4g; the ultrasonic dispersion time is 60min; the amine precipitant (NH 4 ) 2 CO 3 The dosage of the solution is 50ml (2mol / L). The reaction time of the step (1) is 3 hours; the calcination temperature of the step (3) is 700° C., and the calcination time is 2 hours.

Embodiment 3

[0033] The difference between this embodiment and the first embodiment is: SnCl 4 .5H 2 The amount of O is 14.0g; the amount of sodium dodecylbenzenesulfonate is 0.8g; the ultrasonic dispersion time is 60min; the amine precipitant (NH 4 ) 2 CO 3The dosage of the solution is 100ml (4mol / L). The reaction time of step (1) is 4 hours; the calcination temperature of step (3) is 700° C., and the calcination time is 3 hours.

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Abstract

The invention discloses silica / tin oxide composite nanoparticles with nuclear shell structure which contain nano-silica inner cores and a tin oxide shells which are coated on the surface of the nano-silica inner cores. The invention also discloses a preparation method of the silica / tin oxide composite nanoparticles with nuclear shell structure, comprising the following steps: adopting nano-silica, soluble tin salt and amine precipitant as raw materials, dispersing the materials, preparing a precursor and finally obtaining the composite nanoparticles through drying and roasting. The silica / tin oxide composite nanoparticles have wider adjustment range for extinction wave length and effectively improve the usability of the SnO2 nanometer material. The preparation method of the invention has cheap cost, simple process, uniform product size, controllable thickness and high proportion for forming and coating films on the surface of silica with tin oxide.

Description

technical field [0001] The invention relates to the field of nanoparticle preparation, in particular to a silicon dioxide / tin oxide nanocomposite particle with a core-shell structure and a preparation method thereof. Background technique [0002] In the past two decades, nanomaterials technology has developed rapidly, and great progress has been made in material synthesis, design, and assembly. However, the single properties of single materials such as nanospheres, nanowires, nanotubes, nanorods, and nanocubes limit their practical applications. Therefore, it is necessary to combine two or more materials at the nanoscale to produce new properties and applications. A new research hotspot has been formed. The nano-core-shell structure is an ordered assembly structure at the nanoscale formed by one nanomaterial wrapping another material through chemical bonds or other forces, and it is a higher-level composite nanostructure. Nano-coating is a particle surface property tailori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00
Inventor 陈何国张冠琦侯甫文欧阳喜仁陈建军张利利
Owner GUANGZHOU BAIYUN CHEM IND
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