Composite gas-sensitive material used for detecting formaldehyde gas and preparation method thereof

A technology of gas-sensitive materials and formaldehyde gas, which is applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of high working temperature, poor selectivity and stability, and achieve low working temperature, good selectivity and high sensitivity Effect

Inactive Publication Date: 2018-08-14
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a composite gas-sensitive material for formaldehyde gas detection and a preparation method thereof, the composite gas-sensitive material for formaldehyde gas detection and a preparation method thereof To solve the technical problems of sensitivity, high working temperature, poor selectivity and stability of gas-sensitive materials for detecting formaldehyde gas in the prior art

Method used

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  • Composite gas-sensitive material used for detecting formaldehyde gas and preparation method thereof
  • Composite gas-sensitive material used for detecting formaldehyde gas and preparation method thereof
  • Composite gas-sensitive material used for detecting formaldehyde gas and preparation method thereof

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Embodiment 1

[0057] The composite gas-sensing material provided by the present invention is metal oxide and graphene quantum dot material calculated by mass percentage, that is, the graphene quantum dot material accounts for 5%, 10%, 20%, and 30% of the total mass percentage of the composite;

[0058] The metal oxide is zinc oxide;

[0059] The graphene quantum dots are nitrogen-doped graphene quantum dots;

[0060] The zinc oxide is a regular nanosheet structure with a size of 4-10 μm and a thickness of 50-100 nm;

[0061] The graphene quantum dot material is a circular nanosheet structure with a size of 5-20nm and a thickness of 0.6-5nm.

[0062] The preparation method of the above-mentioned composite gas-sensitive material specifically includes the following steps:

[0063] 1. Preparation of ZnO nanosheets by hydrothermal method

[0064] a. Dissolve 4mmol of zinc chloride in 20ml of deionized water and stir for 10min to uniformly disperse zinc chloride in the solution; dissolve 4mmol...

Embodiment 2

[0076] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that in step 3, graphene quantum dots account for 5% of the total mass of the composite.

Embodiment 3

[0077] Embodiment 3: This embodiment is basically the same as Example 1, except that in step 3, graphene quantum dots account for 10% of the total mass of the composite.

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Abstract

The invention provides a composite gas-sensitive material used for detecting formaldehyde gas. The composite gas-sensitive material is composited by a two-dimensional sheet metal oxide and a graphenequantum dot material, the two-dimensional sheet metal oxide accounts for 70-99.99% of mass percentage of the composite material, and the graphene quantum dot material accounts for 0.01-30% of mass percentage of the composite material. The invention also provides a preparation method of the composite gas-sensitive material used for detecting the formaldehyde gas. The invention provides a gas-sensitive element, which comprising a semiconductor element, and the surface of the semiconductor element is uniformly coated with the composite gas-sensitive material used for detecting formaldehyde gas. The invention also provides a preparation method of the above gas-sensitive element. The gas-sensitive element has the advantages of high sensitivity of formaldehyde gas, low operating temperature, good selectivity for interference gas, good stability, and low work temperature, and can be used for detecting formaldehyde gas under different occasions.

Description

technical field [0001] The invention belongs to the field of semiconductor materials, and relates to metal oxide semiconductor gas-sensitive materials, in particular to a composite gas-sensitive material for formaldehyde gas detection and a preparation method thereof. Background technique [0002] As one of the top ten chemicals with the highest output in the world, formaldehyde is a chemical substance in great demand. It is widely used in daily life. For example, adding formaldehyde-containing additives in the process of fabric processing can make Cloth has the advantages of anti-wrinkle, anti-shrinkage and flame-retardant; in addition, it also exists in various synthetic adhesives, among which urea-formaldehyde resin synthesized by formaldehyde and urea under certain reaction conditions has an irreplaceable role in the wood processing industry. status. However, along with the extensive use of formaldehyde in various fields, there are inevitably some troublesome side effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/64
Inventor 王现英陈祯璐王丁杨俊和
Owner UNIV OF SHANGHAI FOR SCI & TECH
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