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Carbon nanotube-based sensing material and preparation method thereof, and application of sensing material in organic amine volatile gas detection

A technology of volatile gas and sensing materials, which is applied in the field of gas sensing, can solve the problems of low specificity and sensitivity, and achieve the effects of solving low specificity and sensitivity, increasing sensitivity, and improving specificity

Active Publication Date: 2019-02-12
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a sensing material based on carbon nanotubes and its preparation method and its application in the detection of organic amine volatile gases, so as to solve the low specificity and sensitivity of carbon nanotubes to organic amine volatile gases The problem

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  • Carbon nanotube-based sensing material and preparation method thereof, and application of sensing material in organic amine volatile gas detection
  • Carbon nanotube-based sensing material and preparation method thereof, and application of sensing material in organic amine volatile gas detection
  • Carbon nanotube-based sensing material and preparation method thereof, and application of sensing material in organic amine volatile gas detection

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[0023] The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention but not to limit the scope of the present invention.

[0024] The sensing material in the present invention is also called composite material, composite thin film or organic amine volatile gas sensitive thin film. Non-covalent interactions are also known as non-bonding interactions.

[0025] (1) Preparation of non-covalently modified carbon nanotubes with 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyanodimethyl-p-benzoquinone

[0026] Add 10 groups of 1mg single-walled carbon nanotubes into 10 groups of 15ml tetrahydrofuran respectively, and sonicate for 30 minutes to disperse the single-walled carbon nanotubes in tetrahydrofuran; add 0, 1.3, 2 , 7, 9, 10, 13, 17.5, 21 and 22 mg of 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyanodimethyl-p-benzoquinone, sonicated for 30min so that 2 , 3,5...

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Abstract

The invention provides a carbon nanotube-based sensing material. The sensing material comprises a single-walled carbon nanotube and 2, 3, 5, 6-tetrafluoro-7, 7', 8, 8'-tetracyanoquinodimethan, wherein2, 3, 5, 6-tetrafluoro-7, 7', 8, 8'-tetracyanoquinodimethan is adsorbed on the surface of the single-walled carbon nanotube through non-covalent interaction. The invention further provides a preparation method of the sensing material and an application of the sensing material in organic amine volatile gas detection. Based on the strong electron-absorption effect of a plurality of electron-withdrawing functional groups of the 2, 3, 5, 6-tetrafluoro-7, 7', 8, 8'-tetracyanoquinodimethan, a strong non-covalent interaction is formed with the carbon nanotube, so that the sensitivity of the sensingmaterial to the organic amine volatile gas is increased.

Description

technical field [0001] The invention relates to the technical field of gas sensing, in particular to a sensing material based on carbon nanotubes, a preparation method thereof and its application in the detection of organic amine volatile gases. Background technique [0002] Organic amines are one of the most important nitrogen-containing organic compounds, widely used in chemical industry, rubber and medical and health industries. They generally have a low olfactory threshold. When it reaches a certain concentration in the air, it not only smells, but also endangers people's health. With increasing concerns in public health, food safety, environmental monitoring, and other related fields, there is an urgent need for highly sensitive and selective detection of low-concentration volatile organic amine gases. [0003] At present, the commonly used methods for the detection of organic amines mainly include gas chromatography-mass spectrometry, high performance liquid chromato...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 陈锦明贺庆国程建功
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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