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Tin dioxide based nano gas sensitive material and preparation method thereof

A technology of tin dioxide and gas-sensitive materials, which is applied to the analysis of materials, electrochemical variables of materials, and material analysis by electromagnetic means.

Inactive Publication Date: 2006-05-10
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical effect of the tin dioxide nanocrystalline composite powder material obtained by this patented technology has not been expressed in the patent literature, nor has it been reported in other literatures, but the above-mentioned shortcomings still exist in terms of the disclosed technical solution itself.

Method used

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  • Tin dioxide based nano gas sensitive material and preparation method thereof
  • Tin dioxide based nano gas sensitive material and preparation method thereof
  • Tin dioxide based nano gas sensitive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 1 part of stannous chloride according to the net molar (part) ratio; 1 part of sodium dodecylbenzenesulfonate; 2 parts of potassium borohydride; 0.03 part of antimony trioxide; 0.02 part of ethyl orthosilicate; After 0.3 parts of the tube were prepared according to the following steps:

[0017] A) Grind the reactant particles stannous chloride and half of sodium dodecylbenzenesulfonate in an agate mortar for 10 minutes respectively, then mix and grind for 10 minutes, then mix the reactant particles with potassium borohydride and the remaining half Sodium dodecylbenzene sulfonate was firstly ground separately in an agate mortar for 10 minutes, then mixed and ground for 10 minutes, and finally the final products of the above two steps were mixed, ground for 30 minutes, and placed in air for 12 hours;

[0018] B) dilute ethyl orthosilicate with an appropriate amount of ethanol, add dropwise deionized water to produce a milky precipitate, then dissolve antimony trioxi...

Embodiment 2

[0023] First weigh 1 part of stannous chloride according to the net molar (part) ratio; 2 parts of sodium dodecylbenzenesulfonate; 2 parts of potassium borohydride; 0.04 part of antimony trioxide; 0.02 part of ethyl orthosilicate, carbon After 0.4 parts of nanotubes, the novel tin dioxide-based nano gas-sensitive material of the present invention was prepared in the same steps and sequence as Example 1.

[0024] With the resistive gas sensor produced by the novel tin dioxide-based nano gas-sensitive material obtained in this example, the resistance (KΩ) value in the air and the sensitivity in 500ppm ethanol gas vary with the heating voltage parameters as shown in Table 2. Show.

Embodiment 3

[0026] First weigh 1 part of stannous chloride according to the net molar (part) ratio; 1 part of sodium dodecylbenzenesulfonate; 2 parts of potassium borohydride; 0.01 part of antimony trioxide; After 0.1 part of nanotubes, the novel tin dioxide-based nano gas-sensitive material of the present invention was prepared according to the same steps and sequence as Example 1.

[0027] With the resistive gas sensor produced by the novel tin dioxide-based nano gas-sensitive material obtained in this example, the resistance (KΩ) value in the air and the sensitivity in 500ppm ethanol gas vary with the heating voltage parameters as shown in Table 3. Show.

[0028] Table 1:

[0029]

[0030] Table 2:

[0031]

[0032] table 3:

[0033]

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Abstract

The invention relates to a stannic oxide (SnO2) base nano air-sensitive material and method for making the same which comprises steps of: calculating and getting stannous chloride as mole ratio, proportioning with sodium dodecylbenzene sulfonate, potassium borohydride, antimony oxide and ethyl silicate; grinding, drying, prefiring to get stannic oxide nano powder; according to the mole proportion, doping carbon nano tube with the produced stannic oxide nano powder. The inventive method has the advantages of being lower cost than doping noble metallic elements in the stannic oxide (SnO2) base nano air-sensitive material, and of having high sensitivity.

Description

technical field [0001] The present invention relates to the technical field of testing or analyzing materials by means of measuring the chemical or physical properties of materials, in particular to a kind of electronic element material, especially to a kind of tin dioxide (SnO 2 )-based nanometer gas sensitive material and preparation method thereof. Background technique [0002] Because tin dioxide-based nanomaterials have good gas-sensing properties, they are widely used in the manufacturing of gas sensors. In order to improve the sensitivity and selectivity, response speed and recovery time of this type of sensor, the research work done by researchers in the industry is mainly in the following aspects: ① Make the material particles as fine as possible, preferably made of nanomaterials, increase the Unit specific surface area to improve sensitivity; ② Make gas-sensitive materials into thin films to increase the contact area with gas and improve sensitivity; ③ Incorporate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30C01B19/02G01N27/407
Inventor 傅刚张麟陈环丁志文
Owner GUANGZHOU UNIVERSITY
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