Preparation method of dimethyl methylphosphonate (DMMP) gas sensor base on silica-based hybrid mesoporous material

A gas sensor and mesoporous material technology, applied in the field of gas sensors and safety engineering, can solve the problems of inability to realize on-site trace detection, lack of portable and cheap detection methods, etc., achieve increased sensitivity and selectivity, and use less materials , good selective effect

Inactive Publication Date: 2012-06-20
SHANGHAI UNIV
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Problems solved by technology

[0004] At present, many detection techniques have been developed to detect sarin poisonous gas, mainly including gas chromatography-mass spectrometry, enzyme inhibition, etc., but most of them are relatively large or Expensive scientific equipment, lack of portable and cheap detection methods, especially rapid on-site trace detection methods

Method used

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  • Preparation method of dimethyl methylphosphonate (DMMP) gas sensor base on silica-based hybrid mesoporous material
  • Preparation method of dimethyl methylphosphonate (DMMP) gas sensor base on silica-based hybrid mesoporous material
  • Preparation method of dimethyl methylphosphonate (DMMP) gas sensor base on silica-based hybrid mesoporous material

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Embodiment 1

[0028] In this example, the preparation method of the silicon-based hybrid mesoporous material modified by hexafluoroisopropanol aniline group and the preparation method of the quartz crystal microbalance (QCM) dimethyl methylphosphonate gas sensor based on the material, the process and the steps are as follows:

[0029] (1) Dissolve 1.0-2.0 g of surfactant polyethylene oxide-polypropylene oxide-polyethylene oxide (P123) in 30.0-40.0 g of 2M hydrochloric acid solution at 30 o C-40 oC Stir for 1-4 h. Then add a certain proportion of carboxyethylsilane triol sodium salt and tetraethyl orthosilicate (TEOS) and stir for 24 h. Then the precursor obtained by the previous step reaction is placed in the autoclave, at 100 o C reacted and crystallized for 24-48 h, and the crystallized product was filtered, washed with water, and dried, and then dissolved in 60ml of 50wt% sulfuric acid solution at 95 o C was refluxed for 24 h. After the solid is washed and dried with water,...

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Abstract

The invention relates to a preparation method of silica-based hybrid mesoporous material and a preparation method of a quartz crystal microbalance dimethyl methylphosphonate (DMMP) sensor coated by the silica-based hybrid mesoporous material, which belongs to fields of sensor technology and safety engineering. The method adopts the silica-based hybrid mesoporous material functionalizing hexafluoroisopropanol anilino group as gas sensing material for absorbing DMMP, not only sufficiently utilizes the advantages of large specific surface, good adsorptive property and uniform bore diameters of the mesoporous material, but also ensures that the gas sensing material has good selectivity through the functionalization of organo-functional group. The DMMP gas sensor prepared by the method of the invention has the characteristics of high sensitivity, high response speed, good repetitiveness, good selectivity, simple device manufacture process and the like.

Description

technical field [0001] The invention relates to a preparation method of a quartz crystal microbalance dimethyl methylphosphonate (DMMP) gas sensor based on a silicon-based hybrid mesoporous material, which belongs to the technical field of gas sensors and safety engineering. Background technique [0002] In recent years, terrorist attacks using explosions in public places and the release of biochemical poisons as the main means of attack have occurred frequently. Anti-terrorism has become an important task in safeguarding national security. Due to its complex composition and high risk, chemical poisons are very difficult to detect early warning. The particularity of anti-terrorism activities poses further challenges to the sensing technology for trace detection of dangerous substances such as chemical agents. Therefore, the development of sensing technology for trace detection of biochemical toxicants has great practical significance. [0003] Among the many chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 郑琦徐甲强李慧敏
Owner SHANGHAI UNIV
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