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Preparation method of hierarchical structured indium oxide hollow tubular gas-sensitive material

A technology of hierarchical structure and gas-sensitive material, applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problems of difficult to meet detection requirements, low reactivity, and low gas sensitivity.

Inactive Publication Date: 2016-01-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional bulk metal oxides are difficult to meet the detection requirements of various application fields due to their large size, low reactivity, poor adsorption capacity, and low sensitivity to gases.

Method used

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  • Preparation method of hierarchical structured indium oxide hollow tubular gas-sensitive material
  • Preparation method of hierarchical structured indium oxide hollow tubular gas-sensitive material
  • Preparation method of hierarchical structured indium oxide hollow tubular gas-sensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Take a small amount of C fiber and disperse it in deionized water, weigh a certain amount of indium chloride and L-cysteine, and dissolve them in deionized water. The concentration of indium chloride is 0.05mol / L, and the concentration of L-cysteine The concentration of cystine is 0.1mol / L, and the molar ratio of indium chloride and L-cysteine ​​is controlled to be 1:1;

[0016] (2) Move the mixed solution obtained in step (1) to a hydrothermal reaction kettle lined with polytetrafluoroethylene, and conduct a hydrothermal reaction at a temperature of 170°C for 16 hours, and then use the product after the hydrothermal reaction The centrifuge is used for solid-liquid separation, and the obtained solid product is washed several times with deionized water and ethanol;

[0017] (3) Place the solid product obtained in step (2) in a drying oven, dry at 60°C for 24 hours, then put it in an alumina crucible and put it in a muffle furnace, and heat it at 450°C for 3 hours to ...

Embodiment 2

[0019] (1) Disperse a small amount of C fiber in deionized water, weigh a certain amount of indium chloride and L-cysteine, and dissolve them in deionized water, in which the concentration of indium chloride is 0.06mol / L, and the concentration of L-cysteine The concentration of cystine is 0.15mol / L, and the molar ratio of indium chloride and L-cysteine ​​is controlled to be 1:1.5;

[0020] (2) Move the mixed solution obtained in step (1) to a hydrothermal reaction kettle lined with polytetrafluoroethylene, and conduct a hydrothermal reaction at a temperature of 180°C for 18 hours, and then use the product after the hydrothermal reaction The centrifuge is used for solid-liquid separation, and the obtained solid product is washed several times with deionized water and ethanol;

[0021] (3) Place the solid product obtained in step (2) in a drying oven, dry at 60°C for 24 hours, then put it in an alumina crucible and put it in a muffle furnace, and heat it at 500°C for 3 hours to ...

Embodiment 3

[0023] (1) Disperse a small amount of C fiber in deionized water, weigh a certain amount of indium chloride and L-cysteine, and dissolve them in deionized water, in which the concentration of indium chloride is 0.067mol / L, and the concentration of L-cysteine The concentration of cystine is 0.133mol / L, and the molar ratio of indium chloride to L-cysteine ​​is controlled to be 1:2;

[0024] (2) Move the mixed solution obtained in step (1) to a hydrothermal reaction kettle lined with polytetrafluoroethylene, conduct a hydrothermal reaction at a temperature of 190°C for 20 hours, and then use the product after the hydrothermal reaction The centrifuge is used for solid-liquid separation, and the obtained solid product is washed several times with deionized water and ethanol;

[0025] (3) Place the solid product obtained in step (2) in a drying oven, dry at 60°C for 24 hours, then put it in an alumina crucible and put it in a muffle furnace, and heat it at 500°C for 3 hours to obtai...

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Abstract

The invention provides a preparation method of a hierarchical structured indium oxide hollow tubular gas-sensitive material. The preparation method specifically comprises the following steps: indium chloride and L-cysteine which are used as raw materials and C-fiber used as a template undergo hydrothermal reaction and calcinations treatment to obtain the hierarchical structured hollow tubular indium oxide. The method has a simple production process. The obtained indium oxide gas-sensitive material has a hollow and hierarchical structure and is a novel gas-sensitive material with high sensitivity.

Description

technical field [0001] The invention relates to a preparation method of a hierarchical structure indium oxide hollow tube gas-sensing material, and belongs to the technical field of preparation technology of advanced nanometer functional materials. Background technique [0002] In recent years, with the rapid development of industrialization, the problem of environmental and air pollution has become increasingly serious. With the continuous advancement of science and technology and the enhancement of people's health awareness, people began to develop various detection instruments and methods to ensure timely and accurate detection of toxic and harmful gases in the environment. As an extremely important branch in the field of sensing technology, gas sensor has received extensive attention. The most widely used gas-sensitive materials for gas sensors are metal oxides. Metal oxides mainly use the adsorption and surface reaction of gases on their surfaces to cause changes in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00
Inventor 张苏宋鹏王琦杨中喜闫慧慧
Owner UNIV OF JINAN
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