Polyhedral cobaltosic oxide-3D porous graphene gel composite material film sensitive to acetone

A technology of tricobalt tetroxide and composite material film, which is applied in the field of gas sensor, can solve the problems of high working temperature, slow response recovery, low sensitivity, etc., and achieve the effects of high practicability, good repeatability, and simple preparation method

Inactive Publication Date: 2017-07-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

while using a single Co 3 o 4 There are still some shortcomings in the detection of a

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  • Polyhedral cobaltosic oxide-3D porous graphene gel composite material film sensitive to acetone
  • Polyhedral cobaltosic oxide-3D porous graphene gel composite material film sensitive to acetone
  • Polyhedral cobaltosic oxide-3D porous graphene gel composite material film sensitive to acetone

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[0025] In Example 1, a certain amount of graphene oxide was added to a certain amount of deionized water, first sonicated for several minutes, and then a certain amount of hydroquinone was added and under continuous magnetic stirring to make it uniformly dispersed; The graphene dispersion is added to the PTFE lining of a stainless steel autoclave with a volume of 50 ml and sealed; put the sealed autoclave into a blast drying box and set a suitable reaction time And the reaction temperature, when the reaction is over, let it cool to room temperature naturally; centrifuge to collect the reaction product, wash with deionized water and absolute ethanol several times, freeze the centrifuged product in a freeze dryer, and then collect the product It is a three-dimensional porous graphene gel; add a certain amount of cobalt nitrate hexahydrate and 2-methylimidazole to a certain amount of deionized water, and make it completely dissolved under continuous magnetic stirring; a certain amo...

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Abstract

The invention provides a preparation method of a polyhedral cobaltosic oxide-3D porous graphene gel composite material sensor film for detecting acetone and belongs to the technical field of gas-sensitive sensors. The method includes: 3D porous graphene gel is synthesized in a hydrothermal manner, the prepared 3D porous graphene gel is composited with a cobalt-based metal organic frame material, thermal treatment is performed on the composite material to obtain the composite material of polyhedral CO3O4 and the polyhedral cobaltosic oxide, and using a coating method to prepare the film for sensing and detecting the acetone. The composite material film can detect the acetone of different concentration, and the sensitivity of the composite material film to 50ppm CO2 reaches up to 81.2(Rgas/R0). The preparation method has the advantages that the method is simple, low in raw material cost and good in repeatability, and the prepared film is excellent in performance, good in application value and promising in application prospect.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and in particular relates to the preparation of a polyhedron-shaped cobalt tetroxide and three-dimensional porous graphene gel composite film and the research on its gas-sensitivity to acetone. Background technique [0002] With the continuous development of human society, the continuous discharge of toxic and harmful gases has caused the atmospheric environment to be polluted to varying degrees, and the existence of such toxic and harmful gases seriously threatens the health of human beings. Therefore, the detection of toxic and harmful gases plays an extremely important role in the detection of environmental quality and personal safety protection. Acetone (CH 3 COCH 3 ) is a kind of organic gas, which is closely related to human life. On the one hand, acetone is one of the most commonly used organic reagents in laboratories and industrial production workshops. Inhalation of a large amou...

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 薛庆忠丁德恭熊雅鲁文博
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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