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Method for manufacturing nano tin dioxide

A technology of nano-tin dioxide and tin salt, applied in the direction of tin oxide, nanotechnology, nanotechnology, etc., can solve the problems of complex operation, high production cost, unsatisfactory product yield, etc., and achieve simple process, low cost and low price cheap effect

Inactive Publication Date: 2008-01-23
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this method uses tin powder / particles as raw materials, the production cost is still relatively high; in addition, because this method fails to solve the problem of particle agglomeration during the chemical precipitation process, the resulting precursor needs to be washed and dried after grinding, processing, etc. Sieve to get nano-SnO with fine particle size 2 Powder, the product yield is not ideal, and the operation is still complicated

Method used

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  • Method for manufacturing nano tin dioxide
  • Method for manufacturing nano tin dioxide

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Experimental program
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Effect test

Embodiment 1

[0017] Weigh SnCl 4 ·5H 2 O 7.01g, made into 200ml of 0.1mol / L solution, and adding 1gPEG4000 and 10ml of 0.1mol / L HCl solution therein; configuring 500ml of 1mol / L ammonia solution; placing the configured tin tetrachloride solution in a magnetic Preheat at 30°C for 10 minutes on a constant temperature stirrer, slowly add the prepared ammonia solution into the tin tetrachloride solution with an alkaline burette, and control the pH value to 3 with a pH meter, then stop adding and continue stirring at a medium speed 15min; the resulting precursor sol was washed 8 times with deionized water during vacuum filtration, washed 2 times with ultrasonic alcohol, and then dried in a blast drying oven at 60°C. Roasting for 2h, the light yellow nano-SnO 2 The XRD pattern of the product is shown in Figure 2, and the TEM photo is shown in Figure 3. The particle size is about 15-17nm, and it can be seen that the grains are evenly distributed and there is no agglomeration.

Embodiment 2

[0019] Embodiment 2 weighs SnCl 4 ·5H 2 O 35.05g, made into 200ml of 0.5mol / L solution, and adding 5gPEG4000 and 10ml0.1mol / L of HCl solution therein; configuring 500ml of 1mol / L ammonia solution; placing the configured tin tetrachloride solution in a magnetic constant temperature Preheat the stirrer at 30°C for 10 minutes, slowly add the prepared ammonia solution into the tin tetrachloride solution with a basic burette, and control the pH value to 2.5 with a pH meter, then stop the dropwise addition and continue stirring at a medium speed for 15 minutes The resulting precursor sol was washed 8 times with deionized water during vacuum filtration, washed 2 times with ultrasonic alcohol, and then dried in a blast drying oven at 60°C, and the white precursor dry powder obtained was roasted in a muffle furnace at 600°C 2h, that is, light yellow nano-SnO 2 The XRD spectrum of the product is shown in Figure 4, and the particle size is about 17-20nm.

Embodiment 3

[0021] Weigh SnCl 4 ·5H 2 O 14.02g, made into 200ml of 0.2mol / L solution, and adding 2gPEG4000 and 10ml0.1mol / L of HCl solution therein; configure 500ml of 1mol / L ammonia solution; place the configured tin tetrachloride solution in a magnetic Preheat at 30°C for 10 minutes on a constant temperature stirrer, slowly add the prepared ammonia solution into the tin tetrachloride solution with a basic burette, and control the pH value to 3.5 with a pH meter, then stop the dropwise addition and continue stirring at a medium speed 15min; the resulting precursor sol was washed 8 times with deionized water during vacuum filtration, washed 2 times with ultrasonic alcohol, and then dried in a blast drying oven at 60°C. Roasting for 2h, the light yellow nano-SnO 2 The particle size of the product is about 10-15nm, and it can be seen that the grains are evenly distributed and there is no agglomeration.

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Abstract

A method for preparing the nano SnO2 powder is provided. The soluble pink salt as the tin source is made into the pink salt solution with concentration of 0.1mol / L to 0.5mol / L. The diluted acid solution is added, and then 0g / L to 10g / L surfactant is added, the precipitant agent is added in drops and the pH value is adjusted to 2.5 to 10, reaction is carried out through magnetic stirring and under the constant temperature of 20 DEG C. to 80 DEG C. to produce the precursor. The nano SnO2 finished product is gained after filtering, washing by deionized water, ultrasonic washing by absolute ethyl alcohol, drying and roasting the gained product. The invention adopts the soluble pink salt as the raw material with low price and cost, which do not need to grind and sieve the precursor with high ratio of product output and simpler process. The nano SnO2 grain size is evener.

Description

technical field [0001] The present invention relates to a kind of SnO 2 The preparation method, especially the preparation of nano-SnO 2 powder method. Background technique [0002] SnO 2 Because of its high electrical conductivity, high transparency in the visible light region, and good thermal and chemical stability, it can be widely used in catalysts, thin film materials, electrode materials, functional ceramics, solar cells, photoelectric sensing devices, etc., and the most An important application is as a raw material for gas sensors. SnO 2 As a common oxide semiconductor, its microcosmic mechanism is mainly caused by the surface desorption of particles in the ambient atmosphere. The larger the particle size, the higher the sensitivity. Therefore, the preparation of nano-SnO 2 It becomes an effective way to improve its gas sensitivity. [0003] Commonly used preparation nano-SnO 2 The methods are chemical vapor deposition (Javier F., MichaelL., Sarkis H.J., Mater...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82B3/00
Inventor 宋晓岚何希杨海平邱冠周杨华明金胜明
Owner CENT SOUTH UNIV
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