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Composite gas sensitive material of organic molecule based on D-pi-A structure and graphene, and preparation method thereof

A graphene composite, organic molecule technology, applied in the analysis of materials, material resistance, material analysis by electromagnetic means, etc., can solve the problem of undiscovered gas-sensitive materials, and achieve high sensitivity and selectivity, simple raw materials, and reaction conditions. mild effect

Active Publication Date: 2016-11-09
BEIHANG UNIV
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Problems solved by technology

However, no relevant report has been found on gas-sensing materials composed of organic molecules of D-π-A structure and graphene supramolecules.

Method used

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  • Composite gas sensitive material of organic molecule based on D-pi-A structure and graphene, and preparation method thereof
  • Composite gas sensitive material of organic molecule based on D-pi-A structure and graphene, and preparation method thereof
  • Composite gas sensitive material of organic molecule based on D-pi-A structure and graphene, and preparation method thereof

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Embodiment Construction

[0035] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0036] The invention provides a gas-sensing material based on D-π-A structure organic molecules and graphene composite and a preparation method thereof, the gas-sensing material is composed of D-π-A structure organic molecules and a matrix substance, and the D- The organic molecule with π-A structure is preferably 5-aminonaphthalene-1-sulfonic acid, and the matrix material is graphene oxide.

[0037] This embodiment provides a gas sensor material prepared with 5-aminonaphthalene-1-sulfonic acid as an organic molecule with a D-π-A structure and graphene oxide as a matrix material. The specific synthesis steps are as follows:

[0038] step one:

[0039] Weigh quantitative graphene oxide and disperse it in deionized water to prepare a 1mg / mL dispersion. The dispersion needs to be ultrasonically treated for 40 minutes and then ultrasonically crushed for ...

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Abstract

The invention discloses a composite gas sensitive material of an organic molecule based on a D-pi-A structure and graphene and a preparation method thereof, and belongs to the technical field of preparation of graphene based gas sensitive material. The gas sensitive material is prepared from an organic molecule with D-pi-A structure and a matrix material. The organic molecule with D-pi-A structure contains naphthalene ring or benzene ring, and anthracene ring, and both electron withdrawing groups and electron donating groups, and a series of similar structures. The method is as below: first dispersing graphene oxide in deionized water to prepare a dispersion, then adding the organic molecule with D-pi-A structure, adding hydrazine hydrate, and heating in an oil bath for reduction reaction; and then conducting suction filtration and washing by using acetate fiber membrane so as to finally obtain a uniform dispersion. The invention provides the composite gas sensitive material of the organic molecule based on the D-pi-A structure and graphene and the preparation method thereof. The prepared gas sensitive material has high selectivity, sensitivity, recovery and stability to NO2. In addition, the raw materials used in the invention re low in cost, green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of preparation of graphene-based gas-sensing materials, in particular to a gas-sensing material based on D-π-A structure organic molecules compounded with graphene and a preparation method thereof. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial produced by sp 2 The single-layer graphite with two-dimensional hexagonal structure formed by the close arrangement of hybridized carbon atoms, each carbon atom is connected to three adjacent carbon atoms through a σ bond, and the network structure of these strong C-C bonds makes the graphene sheet excellent structural rigidity. Each carbon atom has 1 unbonded electron, and these electrons move freely on the delocalized π orbital formed in the direction perpendicular to the atomic plane, which endows graphene with good conductivity, a unique structure and excellent properties. Composite materials have great application po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04G01N27/12
CPCG01N27/125
Inventor 王耀裴文乐
Owner BEIHANG UNIV
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