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Production method of MXene graphene composite structure gas sensor

A gas sensor and graphene composite technology, used in instruments, scientific instruments, measuring devices, etc., can solve problems such as unsatisfactory performance of gas sensors, increase gas adsorption sites, improve response rate and sensitivity, and improve signal-to-noise. the effect of

Active Publication Date: 2021-10-22
GUANGXI NORMAL UNIV
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Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method of MXene graphene composite structure gas sensor, solve the technical problem that the performance of the gas sensor based on MXene / graphene composite structure prepared in the prior art is not ideal

Method used

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  • Production method of MXene graphene composite structure gas sensor
  • Production method of MXene graphene composite structure gas sensor
  • Production method of MXene graphene composite structure gas sensor

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0046] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element...

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Abstract

The invention discloses a production method of an MXene graphene composite structure gas sensor. A continuous graphene film and MXene are adopted to construct a vertically stacked double-layer composite sensitive film, and compared with a composite structure prepared by a solution mixing method, the double-layer composite sensitive film has the advantages that firstly, the continuous graphene film at the lower layer is used as an electric signal transport channel; the thermal noise of an electric signal can be effectively suppressed so that the signal-to-noise ratio of the sensor is improved; and secondly, the MXene on the upper layer has rich functional groups such as hydroxyl and carboxyl so that the gas adsorption sites of the composite sensitive film can be greatly increased, and the response rate and sensitivity of the gas sensor are improved.

Description

technical field [0001] The invention relates to the technical fields of MXene and graphene, in particular to a method for preparing a gas sensor with an MXene graphene composite structure. Background technique [0002] When graphene thin films are used in gas sensors, the way to improve their response speed and sensitivity is to increase the gas adsorption sites on the graphene surface or to modify graphene. [0003] MXene is a new type of two-dimensional material discovered in 2011. It is composed of layered transition metal carbides and nitrides. It has the characteristics of flexible and adjustable components, rich surface functional groups and hydrophilicity, and can provide graphene with abundant The adsorption sites of gas molecules and the high conductivity of graphene have shown great potential in improving the gas sensitivity of graphene and applying it to corresponding gas sensor devices. [0004] The existing MXene / graphene composite structure is mostly prepared ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127Y02A50/20
Inventor 李全福徐敏华陈武良孙曼莉彭慧玲
Owner GUANGXI NORMAL UNIV
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