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Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material and preparation method thereof

A technology of mesoporous silicon oxide and nickel oxide, applied in the direction of material resistance, nanotechnology, etc., can solve the problems of high sensitivity and good stability, and achieve the effects of unique materials, enhanced thermal stability, and reduced specific surface area loss

Inactive Publication Date: 2015-04-29
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no formaldehyde gas sensitive material with high sensitivity and good stability.

Method used

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  • Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material and preparation method thereof
  • Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material and preparation method thereof
  • Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of preparation method of iron-doped double mesoporous nickel oxide formaldehyde gas-sensing material, its preparation method comprises as follows:

[0026] Mix 6.0g of surfactant P123, 216g of water and 11.8g of concentrated hydrochloric acid at 35°C, stir for 1-12 hours until all the surfactants are dissolved and dispersed evenly, then add 6g of n-butanol, stir for 2 hours, then add 12.9 After stirring for 24 hours, transfer TEOS to a polytetrafluoroethylene bottle, followed by hydrothermal reaction at 40°C for 1 day, after natural cooling, suction filtration, washing, and natural drying at room temperature, that is to say, it contains surfactant mesoporous silica. The sample surfactant P123 obtained above was removed by calcining at 550°C in air for 6 hours to obtain a white powder. The obtained ordered mesoporous silica has a specific surface area of ​​736 m 2 / g, pore volume 0. 64cm 3 / g, the pore size is about 4.8 nm.

[0027] Use 1 g of th...

Embodiment 2

[0029] Embodiment 2: a kind of preparation method of iron-doped double mesoporous nickel oxide formaldehyde gas-sensing material, its preparation method comprises as follows:

[0030] Mix 6.0g of surfactant P123, 216g of water and 11.8g of concentrated hydrochloric acid at 35°C, stir for 1-12 hours until all the surfactants are dissolved and dispersed evenly, then add 6g of n-butanol, stir for 2 hours, then add 12.9 After stirring for 24 hours, transfer TEOS to a polytetrafluoroethylene bottle, followed by hydrothermal reaction at 40°C for 1 day, after natural cooling, suction filtration, washing, and natural drying at room temperature, that is to say, it contains surfactant mesoporous silica. The sample surfactant P123 obtained above was removed by calcining at 550°C in air for 6 hours to obtain a white powder. The obtained ordered mesoporous silica has a specific surface area of ​​736 m 2 / g, pore volume 0. 64cm 3 / g, the pore size is about 4.8 nm.

[0031] Use 1 g of th...

Embodiment 3

[0032] Embodiment 3: a kind of preparation method of iron-doped double mesoporous nickel oxide formaldehyde gas-sensing material, its preparation method comprises as follows:

[0033] Mix 6.0g of surfactant P123, 216g of water and 11.8g of concentrated hydrochloric acid at 35°C, stir for 1-12 hours until the surfactant is completely dissolved and dispersed evenly, then add 6g of n-butanol, stir for 2 hours, then add 12.9g Ethyl orthosilicate TEOS, stirred for 24 hours, transferred to a polytetrafluoroethylene bottle, followed by hydrothermal reaction at 40 degrees for 1 day, natural cooling, suction filtration, washing, and natural drying at room temperature, that is, the product containing surfactant Mesoporous silica. The sample surfactant P123 obtained above was removed by calcining at 550°C in air for 6 hours to obtain a white powder. The obtained ordered mesoporous silica has a specific surface area of ​​736 m 2 / g, pore volume 0. 64cm 3 / g, the pore size is about 4.8 ...

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Abstract

The invention relates to a sensing material and a preparation method of the sensing material and in particular relates to a Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material and a preparation method of the Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material. The Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material is formed by Fe-doped nickel oxide spiral nanowires through cubic periodic arrangement; the preparation method of the Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material comprises the steps of mixing surface active agents, water and hydrochloric acid until the surface active agents are completely dissolved, adding with n-butyl alcohol, stirring for 2h, then adding with tetraethoxysilane and stirring for one day, carrying out hydrothermal reaction for one day at 35-100 DEG C, cooling, performing suction filtration, washing, and drying to obtain white powder; calcining in air to remove the surface active agent; by using the calcined ordered mesoporous silica as a hard template, adding the hard template into ethanol solution of nickel nitrate and ferric nitrate, and calcining in air; and adding sodium hydroxide solution into the calcined product, stirring, centrifuging, and filtering to obtain the Fe-doped bimodal mesoporous nickel oxide material. The Fe-doped bimodal mesoporous nickel oxide formaldehyde gas sensitive material has high sensitivity and good stability.

Description

technical field [0001] The invention relates to a gas-sensing material and a preparation method thereof, in particular to an iron-doped double mesoporous nickel oxide formaldehyde gas-sensing 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 exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12B82Y40/00
Inventor 薛屏申国鑫赖小勇闫冰青杨晓梅夏维涛李鹏
Owner NINGXIA UNIVERSITY
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