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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 acetone, such as high working temperature, low sensitivity, slow response recovery, etc.

Method used

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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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Embodiment 1

[0025]Example 1, a certain amount of graphene oxide is added to a certain amount of deionized water, first ultrasonic for several minutes, then a certain amount of hydroquinone is added and it is uniformly dispersed under non-stop magnetic stirring; the oxidized The graphene dispersion is added into the polytetrafluoroethylene lining of a stainless steel autoclave with a volume of 50 milliliters, and it is sealed; the sealed autoclave is put into a blast drying oven, and a suitable reaction time is set and reaction temperature, when the reaction is over, allow it to cool naturally to room temperature; collect the reaction product by centrifugation, wash several times with deionized water and absolute ethanol respectively, freeze-dry the centrifuged product in a freeze dryer, and then collect the product It is a three-dimensional porous graphene gel; a certain amount of cobalt nitrate hexahydrate and 2-methylimidazole are respectively added to a certain amount of deionized water...

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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...

Claims

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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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