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MOFs conductive polymer composite film gas sensor and preparation method thereof

A technology of gas sensors and conductive polymers, which can be used in instruments, scientific instruments, air quality improvement, etc., can solve the problems of poor conductivity of MOFs and achieve excellent gas sensitivity

Pending Publication Date: 2022-05-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to solve the problem of poor conductivity of MOFs in the application of gas sensors, and provide a MOF / conductive polymer suitable for chemical resistance sensors prepared by blending CoCe-BTC and PEDOT Composite film gas sensor and its preparation method, the prepared composite sensitive material combines the advantages of CoCe-BTC and PEDOT, has good gas sensitivity, conductivity and cycle stability, and the comprehensive performance has been greatly improved

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  • MOFs conductive polymer composite film gas sensor and preparation method thereof
  • MOFs conductive polymer composite film gas sensor and preparation method thereof
  • MOFs conductive polymer composite film gas sensor and preparation method thereof

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Embodiment 1

[0058] This embodiment provides a preparation method of a MOFs conductive polymer composite thin film gas sensor. Poly-3,4-ethylenedioxythiophene PEDOT is deposited on the surface of gold interdigitated electrodes, and cobalt nitrate hexahydrate, cerium nitrate hexahydrate and trimesic acid are used. Formic acid was used as raw material to synthesize cobalt-cerium-based metal organic framework CoCe-BTC by water bath method, and then spin coating method was used to obtain CoCe-BTC / PEDOT composite film.

Embodiment 2

[0060] The present embodiment provides a preparation method of a MOFs conductive polymer composite thin film gas sensor, comprising the following steps:

[0061] S1, using cobalt nitrate hexahydrate, cerium nitrate hexahydrate and trimesic acid as raw materials to synthesize cobalt-cerium-based metal organic framework CoCe-BTC by a water bath method;

[0062] S2, cleaning and preprocessing the silicon oxide substrate, and then preparing gold interdigitated electrodes on the surface;

[0063] S3. Spin-coat poly-3,4-ethylenedioxythiophene PEDOT on the interdigitated electrode obtained in step S2, and place it on a hot table to dry;

[0064] S4. Spin-coat the cobalt-cerium-based metal organic framework CoCe-BTC on the interdigitated electrode obtained in step S3, and put it on a hot table to dry, to obtain a gas sensor with a MOFs conductive polymer composite film CoCe-BTC / PEDOT.

Embodiment 3

[0066] The present embodiment provides a preparation method of a MOFs conductive polymer composite thin film gas sensor, comprising the following steps:

[0067] (1) S1, using cobalt nitrate hexahydrate, cerium nitrate hexahydrate and trimesic acid as raw materials to synthesize cobalt-cerium-based metal organic framework CoCe-BTC by a water bath method;

[0068] Specifically, step S1 specifically includes the following steps:

[0069] S101, a certain proportion of cobalt nitrate hexahydrate and cerium nitrate hexahydrate are dissolved in the first solvent successively, and fully stirred to form a uniform mixed solution;

[0070] Preferably, in step S101, the molar ratio of cobalt nitrate hexahydrate and cerium nitrate hexahydrate is 1:10;

[0071] Preferably, the first solvent in step S101 is deionized water for dissolving cobalt nitrate hexahydrate and cerium nitrate hexahydrate;

[0072] S102, a certain amount of trimesic acid is dissolved in the second solvent, and fully...

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Abstract

The invention discloses an MOFs conductive polymer composite film gas sensor and a preparation method thereof, poly (3, 4-ethylenedioxythiophene) PEDOT is deposited on the surface of a gold interdigital electrode, cobalt nitrate hexahydrate, cerium nitrate hexahydrate and trimesic acid are used as raw materials to synthesize a cobalt-cerium-based metal organic framework CoCe-BTC by a water bath method, then a CoCe-BTC / PEDOT composite film is obtained by a spin-coating method, and the MOFs conductive polymer composite film gas sensor is prepared. According to the method, the CoCe-BTC / PEDOT composite film can be simply and efficiently transferred to the smooth substrate, the prepared sensor combines the advantages of CoCe-BTC and PEDOT, meanwhile, the responsivity and the conductivity are improved, the stability is good, the cost is low, and a good design concept is provided for large-scale production of the type of gas sensors.

Description

technical field [0001] The invention relates to the field of gas sensitive materials, in particular to a MOF / conductive polymer composite thin film gas sensor and a preparation method thereof. Background technique [0002] In recent years, with people's increasing attention to the monitoring of various harmful gases and the control of atmospheric pollutants, the development of efficient gas sensors has become the consensus of countries around the world. Nitrogen dioxide (NO 2 ) is a reddish-brown toxic pollutant with a pungent odor mainly produced by fossil fuel combustion and industrial production activities, mainly in different proportions (x) of nitrogen oxides (NO x ) in the form of a mixture. It has attracted much attention due to its potential harm to environmental safety and human health, such as acid rain, photochemical smog and pm2.5 (particles with a diameter of less than or equal to 2.5μm), etc. 2 Exposure to nitrogen dioxide puts people at high risk for respir...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/126Y02A50/20
Inventor 杨亚杰奚润晖查小婷石柳蔚王程鹏徐建华
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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