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A gas-sensing material based on d-π-a structure organic molecule and graphene composite and its preparation method

A graphene composite and organic molecule technology, applied in graphene, analytical materials, material resistance, etc., can solve the problems of undiscovered gas-sensitive materials, and achieve the effects of low cost, low noise, and mild reaction conditions

Active Publication Date: 2018-06-12
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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  • A gas-sensing material based on d-π-a structure organic molecule and graphene composite and its preparation method
  • A gas-sensing material based on d-π-a structure organic molecule and graphene composite and its preparation method
  • A gas-sensing material based on d-π-a structure organic molecule and graphene composite and its preparation method

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Embodiment Construction

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

[0036] The invention provides a gas-sensing material based on the compounding of organic molecules of D-π-A structure and graphene and a preparation method thereof. The gas-sensing material is composed of organic molecules of D-π-A structure and a matrix substance. 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 by using 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 a certain amount of graphene oxide and disperse it in deionized water to prepare a dispersion liquid of 1 mg / mL. This dispersion liquid needs to be ultrasonically treated for 40 mi...

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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 graphene-based gas-sensing material preparation, and particularly relates to a gas-sensing material based on the composite of organic molecules of D-π-A structure and graphene and a preparation method thereof. Background technique [0002] Graphene is a novel two-dimensional carbon nanomaterial composed of sp 2 Hybrid carbon atoms are closely arranged to form a two-dimensional hexagonal structure of single-layer graphite. Each carbon atom is connected to three adjacent carbon atoms through σ bonds. The network structure of these strong C-C bonds makes the graphene sheet with excellent properties. structural rigidity. Each carbon atom has 1 unbonded electron, and these electrons move freely in the delocalized π orbitals formed in the direction perpendicular to the atomic plane, giving graphene good electrical conductivity with a unique structure and excellent properties. Composite materials have great ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184G01N27/12
CPCG01N27/125
Inventor 王耀裴文乐
Owner BEIHANG UNIV
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