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Method for preparing hollow spherical stannic oxide nano powder

A hollow spherical, nano-powder technology, applied in tin oxide, nano-structure manufacturing, nano-technology, etc., can solve problems such as pollution, environment, and high heat treatment temperature, and achieve the effect of no pollution in the process, simple raw materials, and easy access to raw materials

Inactive Publication Date: 2011-06-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 1. The heat treatment temperature is high, and impurities are easily introduced during the high-temperature calcination process, which leads to the growth and agglomeration of powder particles, thus affecting the final performance of the powder
[0007] 2. The preparation and removal of templates increases the complexity of the process and increases the cost, and when a large number of templates are removed by chemical solution corrosion, it will cause environmental pollution, which is not conducive to long-term large-scale production

Method used

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  • Method for preparing hollow spherical stannic oxide nano powder
  • Method for preparing hollow spherical stannic oxide nano powder
  • Method for preparing hollow spherical stannic oxide nano powder

Examples

Experimental program
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Embodiment 1

[0032] a) 1.3539g SnCl 2 .2H 2 O is dissolved in 20ml of absolute ethanol, then stirred until forming the clear solution of tin protochloride of 0.3mol / l; The NaOH of 0.8g is dissolved in 50ml deionized water, then stirred until forming the clear solution of NaOH of 0.4mol / l;

[0033] b) under strong stirring, NaOH solution is evenly added dropwise to the tin salt solution until the pH value is between 11 and 13, and then stirred for 10 minutes to form a uniform milky white precursor solution;

[0034] c) Transfer the above precursor solution to a hydrothermal reactor, conduct a hydrothermal treatment at 180° C. for 12 hours, and then naturally cool to room temperature;

[0035] d) Wash the hydrothermal product several times with deionized water and absolute ethanol in sequence until the soluble ions are completely removed, and dry at 70°C for 2 hours under vacuum to obtain white hollow spherical SnO 2 Nano powder. by SnO 2 SnO composed of nanoparticles 2 The diameter of ...

Embodiment 2

[0038] a) 1.8052g SnCl 2 .2H 2 O is dissolved in 20ml of absolute ethanol, then stirred until forming the clear solution of stannous chloride of 0.4mol / l; the NaOH of 0.4g is dissolved in 20ml deionized water, then stirred until forming the clear solution of NaOH of 0.5mol / l;

[0039] b) Under strong stirring, evenly drop NaOH solution into the tin salt solution until the pH value is between 11 and 13, and then stir for 15 minutes to form a uniform milky white precursor solution;

[0040] c) Add 10ml of ethylene glycol to the above precursor solution, and then stir for 30min to form a uniform solution;

[0041] d) Transfer the above solution to a hydrothermal reaction kettle, perform hydrothermal treatment at 180° C. for 12 hours, and then naturally cool to room temperature;

[0042] e) Wash the hydrothermal product several times with deionized water and absolute ethanol in sequence until the soluble ions are completely removed, and dry at 90°C for 1 h under vacuum to obtain w...

Embodiment 3

[0044] a) 1.0518g SnCl 4 .5H 2 O is dissolved in 10ml of deionized water, then stirred until forming a 0.3mol / l tin chloride solution; 0.8g of NaOH is dissolved in 40ml of deionized water, then stirred until forming a 0.5mol / l clear solution of NaOH;

[0045] b) under strong stirring, NaOH solution is evenly added dropwise to the tin salt solution until the pH value is between 11 and 13, and then stirred for 10 minutes to form a uniform milky white precursor solution;

[0046] c) Transfer the above precursor solution to a hydrothermal reaction kettle, hydrothermally treat at 160°C for 16h, and then naturally cool to room temperature;

[0047] d) Wash the hydrothermal product several times with deionized water and absolute ethanol in sequence until the soluble ions are completely removed, and dry at 60 °C for 3 h under vacuum to obtain white hollow spherical SnO 2 Nano powder. by SnO 2 SnO composed of nanoparticles 2 The diameter of the hollow sphere is about 1 μm, and the...

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Abstract

The invention provides a method for preparing hollow spherical stannic oxide nano powder and belongs to the technical field of preparation of nano materials. The preparation method mainly comprises the steps of: respectively preparing tin salt and an alkali source into solution; uniformly dripping the solution of the alkali source into the solution of tin salt with stirring of a magnetic force, and stirring to obtain uniform precursor solution; performing hydrothermal treatment on the precursor solution in a reaction kettle; washing and drying the hydrothermal product to obtain the hollow spherical powder consisting of nano SnO2 particles. The prepared SnO2 hollow spheres have uniform size, regular shape, good crystallization and uniform thickness of a spherical shell. In the method, an expendable template is not needed, the process is simple and reaction conditions are mild, and the method has the characteristics of short preparation period, high product quality, high yield, low costand the like, and is an environmentally-friendly synthesis method.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing hollow spherical tin dioxide nanopowder. Background technique [0002] Hollow sphere material, as a special nano or micro material, is an important class of structural materials with novel characteristics and functions developed in recent years. layer. This kind of material has the characteristics of low density, high specific surface area, stable structure and surface permeability, and its hollow part can accommodate guest materials, so it can be widely used in the carrier of drugs, dyes and catalysts, gas-sensitive materials, filter materials, Low dielectric materials, artificial cells and photonic crystals and other fields. [0003] Tin dioxide (SnO 2 ) is a wide bandgap semiconductor material with high chemical stability and excellent photoelectric performance. The bandgap width at room temperature is 3.6eV. SnO2 with a hollow spher...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82B3/00
Inventor 郭艳群李月杨晔谭瑞琴宋伟杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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