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A kind of graphene-based gas-sensitive material and preparation method thereof

A gas-sensing material, graphene-based technology, applied in graphene, analytical materials, chemical instruments and methods, etc., can solve the problems of general gas-sensing performance, recovery response and long recovery time

Active Publication Date: 2022-03-22
HEBEI CHEM & PHARMA COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the general gas-sensing performance of the existing gas-sensing materials, especially the gas-sensing performance at room temperature, such as the recovery response and long recovery time at room temperature, and provide a A kind of graphene-based gas-sensitive material and preparation method thereof

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  • A kind of graphene-based gas-sensitive material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] In parts by weight, take successively: 30 parts of D50 are 1# graphene oxide of 50nm, 20 parts of D50 are 2# graphene oxide of 200nm, 15 parts of D50 are 3# graphene oxide of 1200nm, import in the mixer , with a rotating speed of 1200r / min stirring and mixing for 60min, discharging, to obtain compound graphene oxide;

[0030] After mixing the compounded graphene oxide and water at a mass ratio of 1:10, and then ultrasonically stripping it for 80 minutes at an ultrasonic frequency of 180 kHz, then add metal oxide particles with a compounded graphene oxide mass of 15%. , the particle size distribution range of the metal oxide is 5-30nm, continue to ultrasonically disperse for 40min under the condition of ultrasonic frequency of 70kHz, then filter with suction to obtain a filter cake, and wash the filter cake with deionized water for 5 times, then wash the washed The filter cake was transferred to an oven, and dried to a constant weight at a temperature of 120°C to obtain ...

Embodiment 2

[0034] In parts by weight, take successively: 25 parts of D50 are 1# graphene oxide of 30nm, 18 parts of D50 are 2# graphene oxide of 180nm, 12 parts of D50 are 3# graphene oxide of 800nm, import in the mixer , stirring and mixing for 50 minutes with a rotating speed of 1000r / min, and discharging to obtain compound graphene oxide;

[0035] After mixing the compounded graphene oxide and water at a mass ratio of 1:8, and then ultrasonically stripping it for 70 minutes at an ultrasonic frequency of 160 kHz, add metal oxide particles with a compounded graphene oxide mass of 12%. , the particle size distribution range of the metal oxide particles is 10-30nm, continue to ultrasonically disperse at an ultrasonic frequency of 65kHz for 30min, then filter with suction to obtain a filter cake, wash the filter cake 4 times with deionized water, and then wash the filter cake The filter cake was transferred to an oven and dried to a constant weight at a temperature of 110°C to obtain a dry...

Embodiment 3

[0039] In parts by weight, take successively: 20 parts of D50 are 1# graphene oxide of 10nm, 15 parts of D50 are 2# graphene oxide of 100nm, 10 parts of D50 are 3# graphene oxide of 500nm, import in the mixer , with a rotating speed of 800r / min stirring and mixing for 40min, discharging, to obtain compound graphene oxide;

[0040]After mixing the compounded graphene oxide and water at a mass ratio of 1:5, and then ultrasonically stripping it for 60 minutes at an ultrasonic frequency of 100 kHz, then add metal oxide particles with a compounded graphene oxide mass of 10%. , the particle size distribution range of the metal oxide particles is 5-10nm, continue to ultrasonically disperse at an ultrasonic frequency of 60kHz for 20min, then filter with suction to obtain a filter cake, wash the filter cake 3 times with deionized water, and then wash the filter cake The filter cake was transferred to an oven and dried to a constant weight at a temperature of 100°C to obtain a dry filte...

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Abstract

The invention belongs to the technical field of gas sensor materials, and in particular relates to a graphene-based gas-sensitive material and a preparation method thereof. In the product that the present invention develops, comprise composite graphene oxide and metal oxide particle; Described composite graphene oxide is the 1# graphene oxide that is 10-50nm by D50, and the 2# graphite oxide that D50 is 100-200nm ene, and 3# graphene oxide with D50 of 500-1200nm; the metal oxide is selected from: cobalt oxide, cobaltous oxide, tin oxide, cuprous oxide, zinc oxide, ferric oxide, oxide Any one in iron, tungsten oxide, manganese dioxide; The OI value of described graphene-based gas-sensitive material is 10-25; The OI value of described graphene-based gas-sensitive material is: adopt XRD diffractometer, test its The ratio of the peak area of ​​the 004 characteristic peak to the peak area of ​​the 110 characteristic peak.

Description

technical field [0001] The invention belongs to the technical field of gas sensor materials. More specifically, it relates to a graphene-based gas-sensitive material and a preparation method thereof. Background technique [0002] Metal oxide semiconductors have been very important gas-sensing materials for a long time, and there have been a lot of reports on metal oxides as gas-sensing materials. With the discovery of graphene materials, researchers began to try to use them in gas sensors, especially the use of graphene derivative rGO in gas sensors, which has been reported at home and abroad. The rGO was obtained by step annealing, the gas sensor was prepared, and its response to nitrogen dioxide and ammonia at room temperature was tested. The response of the sensor to nitrogen dioxide can be fully recovered within 10-30 minutes, but the response to ammonia is unstable. At the same time, researchers also began to compound metal oxides by adding graphene, especially rGO, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198C01G51/04C01G49/08C01G49/06C01G45/02C01G41/02C01G19/02C01G9/02C01G3/02B82Y30/00G01N23/207
CPCC01B32/198C01G51/04C01G49/08C01G49/06C01G45/02C01G41/02C01G19/02C01G9/02C01G3/02B82Y30/00G01N23/207C01B2204/32C01B2204/20C01P2004/80C01P2004/64
Inventor 高雅男
Owner HEBEI CHEM & PHARMA COLLEGE
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