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Silver and indium oxide composite nanorod array formaldehyde air-sensitive material and preparation method thereof

A technology of nanorod array and indium oxide, which is applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., to achieve the effects of reducing sintering, enhancing thermal stability, and accelerating response and recovery speed

Inactive Publication Date: 2012-09-19
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, formaldehyde gas-sensitive materials with high sensitivity and good stability still need to be further developed.

Method used

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  • Silver and indium oxide composite nanorod array formaldehyde air-sensitive material and preparation method thereof
  • Silver and indium oxide composite nanorod array formaldehyde air-sensitive material and preparation method thereof
  • Silver and indium oxide composite nanorod array formaldehyde air-sensitive material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1: A silver-indium oxide composite nanorod array formaldehyde gas-sensitive material, the formaldehyde gas-sensitive material is formed by a hexagonal periodic arrangement of silver-indium oxide composite nanorods, and the length between the nanorods is 2-5nm connection, the diameter of the nanorod is 9 nm, the length is 20-500 nm, and the mass percentage of the silver in the composite is 9.4%.

[0028] The preparation method of the silver-indium oxide composite nanorod array formaldehyde gas-sensitive material is as follows:

[0029] Mix 8.0g of surfactant P123, 60g of water and 240g of 2 M hydrochloric acid at 35°C, stir for 12 hours until all the surfactants are dissolved and dispersed evenly, then add 16.72g of ethyl orthosilicate TEOS, stir for 5 minutes After that, it was transferred to a polytetrafluoroethylene bottle and left to stand in an oven at 35°C for 20 hours, followed by hydrothermal reaction at 130°C for 5 days, after natural cooling, suction fi...

Embodiment 2

[0033] Example 2: A silver-indium oxide composite nanorod array formaldehyde gas-sensitive material, the formaldehyde gas-sensitive material is formed by a hexagonal periodic arrangement of silver-indium oxide composite nanorods, and the length between the nanorods is 2-5nm connection, the diameter of the nanorod is 9nm, the length is 20-500nm, and the mass percentage of the silver in the composite is 0.2%.

[0034] The preparation method of the silver-indium oxide composite nanorod array formaldehyde gas-sensitive material is as follows:

[0035] Mix 8.0g of surfactant P123, 60g of water and 240g of 2 M hydrochloric acid at 35°C, stir for 12 hours until all the surfactants are dissolved and dispersed evenly, then add 16.72g of ethyl orthosilicate TEOS, stir for 5 minutes Afterwards, it was transferred to a polytetrafluoroethylene bottle and left to stand in an oven at 35°C for 20 hours, followed by hydrothermal reaction at 130°C for 5 days, after natural cooling, suction filt...

Embodiment 3

[0037] Embodiment 3: A formaldehyde gas-sensing material of a silver-indium oxide composite nanorod array, the formaldehyde gas-sensing material is formed by a hexagonal periodic arrangement of silver-indium oxide composite nanorods, and the length between the nanorods is 2-5nm connection, the diameter of the nanorod is 9nm, the length is 20-500nm, and the mass percentage of the silver in the composite is 20%.

[0038] The preparation method of the silver-indium oxide composite nanorod array formaldehyde gas-sensitive material is as follows:

[0039] Mix 8.0g of surfactant P123, 60g of water and 240g of 2 M hydrochloric acid at 35°C, stir for 12 hours until all the surfactants are dissolved and dispersed evenly, then add 16.72g of ethyl orthosilicate TEOS, stir for 5 minutes After that, it was transferred to a polytetrafluoroethylene bottle and left to stand in an oven at 35°C for 20 hours, followed by hydrothermal reaction at 130°C for 5 days, after natural cooling, suction f...

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Abstract

The invention relates to a sensing material and a preparation method thereof, in particular to a silver and indium oxide composite nanorod array formaldehyde air-sensitive material and a preparation method thereof. The material is formed by hexagonally and periodically arraying silver and indium oxide composite nanorods. The preparation method comprises mixing and stirring surfactant, water and hydrochloric acid until the surfactant is dissolved totally; then adding ethyl orthosilicate in the mixture and stirring; performing hydrothermal reaction for 1-5 days at the temperature of 130 DEG C after standing; performing suction filtration, washing and drying after cooling so as to obtain white powder; using solvent to extract mesoporous silica which is a hard template; adding the mesoporous silica into ethanol solution with indium nitrate and silver nitrate, stirring and dipping; repeating the steps; and finally adding caustic soda solution in a calcined product, and centrifugally filtering to obtain an orderly silver and indium oxide composite nanorod array material after stirring. The silver and indium oxide composite nanorod array formaldehyde air-sensitive material and the preparation method thereof have the advantages of high sensitivity and fine stability.

Description

technical field [0001] The invention relates to a sensing material and a preparation method thereof, in particular to a silver-indium oxide composite nanorod array formaldehyde gas sensitive material and a preparation method thereof. Background technique [0002] As we all know, formaldehyde is an important chemical raw material, widely used in synthetic resins, surfactants, plastics, rubber, leather, paper, dyes, pharmaceuticals, pesticides, photographic film, explosives, building materials, as well as disinfection, fumigation and anticorrosion, etc. industry, but at the same time formaldehyde gas can strongly stimulate human mucous membranes, is carcinogenic, and is a highly toxic substance, so the effective detection of formaldehyde is particularly important. [0003] At present, the detection methods of formaldehyde gas mainly include spectrophotometry, chromatography, fluorescence, and electrochemical methods, but these methods still have some shortcomings, such as expe...

Claims

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Application Information

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IPC IPC(8): G01N27/00C01G15/00B82Y30/00B82Y40/00
Inventor 赖小勇薛屏李鹏
Owner NINGXIA UNIVERSITY
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