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Prepn process of nanometer tin dioxide particle with homogenous particle size

A nanoparticle and tin dioxide technology, applied in tin oxide, nanostructure manufacturing, nanotechnology, etc., can solve the problems of unsuitable for industrialized continuous production, difficult to remove impurities, complex process, etc., achieve small size, simple equipment, good dispersion effect

Active Publication Date: 2007-01-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gel method, liquid phase precipitation method, solid phase method, hydrothermal method, etc. However, these methods have the disadvantages of complex process, long production cycle, and difficult removal of impurities after reaction, and are not suitable for large-scale industrial continuous production.

Method used

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  • Prepn process of nanometer tin dioxide particle with homogenous particle size
  • Prepn process of nanometer tin dioxide particle with homogenous particle size
  • Prepn process of nanometer tin dioxide particle with homogenous particle size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mixed solution of tin tetrachloride and dehydrated alcohol (mass ratio is 10: 100, flow rate 10ml / min) is mixed with N 2 (0.3m 3 / h) loaded into the evaporator, the temperature of the evaporator is controlled at 200°C, the vaporized and preheated air (200°C, 1m 3 / h), central tube hydrogen (0.05m 3 / h) After uniform mixing, it enters the combustion reactor from the center tube of the burner. Bicyclic hydrogen (0.5m 3 / h) and the second ring air (0.3m 3 The mixed gas of / h) is added from the second ring inlet to form an annular auxiliary flame, which is used to maintain the stability of the central jet flame and adjust the temperature of the reaction zone. There is another three-ring air (2m 3 / h) is added via three rings, and the hydrolysis reaction is carried out in a combustion chamber at a reaction temperature of 1500°C. The average diameter of the prepared tin dioxide nanoparticles is 12nm, the particle size is uniform, and the dispersion is good. figure...

Embodiment 2

[0028] The mixed solution of tin tetrachloride, dehydrated alcohol (mass ratio is 30: 100, flow rate 30ml / min) is by N 2 (0.8m 3 / h) loaded into the evaporator, the temperature of the evaporator is controlled at 300°C, the vaporized and preheated air (250°C, 3m 3 / h), central tube hydrogen (1m 3 / h) After uniform mixing, it enters the combustion reactor from the center tube of the burner. Bicyclic hydrogen (2.4m 3 / h) and the second ring air (0.8m 3 The mixed gas of / h) is added from the second ring inlet to form an annular auxiliary flame, which is used to maintain the stability of the central jet flame and adjust the temperature of the reaction zone. There is another three-ring air (5m 3 / h) is added via three rings, and the hydrolysis reaction is carried out in a combustion chamber at a reaction temperature of 1800°C. The average diameter of the prepared tin dioxide nanoparticles is 28nm, the particle size is uniform, and the dispersion is good. SEM photo see image...

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Abstract

The preparation process of nanometer tin dioxide particle with homogeneous particle size includes the following steps: carrying the mixed solution of tin tetrachloride and ethanol with N2 as carrier gas to evaporator for gasifying, mixing with hydrogen and air, feeding the mixture through the central tube of the three-channel nozzle in the top of the combusting reactor into the combusting reactor, feeding gas mixture of hydrogen and air through the middle ring tube of the three-channel nozzle into the combusting reactor, feeding air through the out ring tube of the three-channel nozzle into the combusting reactor, hydrolysis, and collecting produced nanometer tin dioxide particle while exhausting tail gas. The said preparation process can prepare nanometer tin dioxide particle of 10-20 nm size, great specific surface area and high dispersivity.

Description

technical field [0001] The invention relates to a preparation method of tin dioxide nanoparticles. Background technique [0002] Tin dioxide (SnO 2 ) is one of the important wide-bandgap semiconductor materials with a bandgap width of 3.6eV. Because of its chemical and mechanical stability, it is widely used in transparent conductive films, gas sensors, photocatalysis, and solar energy conversion. In the 21st century, people have increasingly discovered that nanoscale materials have many special physical and chemical properties, SnO 2 Nanomaterials have also received special attention. [0003] Among them, as the gas sensor is SnO 2 One of the most important uses affecting SnO 2 There are many factors for gas sensitivity, among which the size of grains and the size of specific surface area are the main influencing factors. Usually, SnO 2 The smaller the particle size, the larger the specific surface area, and the greater the sensitivity, because the gas-sensing effect ...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82B3/00
Inventor 李春忠胡彦杰姜海波顾锋
Owner EAST CHINA UNIV OF SCI & TECH
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