Binary carbon material-conductive polymer composite nano gas-sensitive thin film and preparation method thereof

A technology of conductive polymers and binary carbon materials, which is applied in the field of composite nanomaterials and film technology, can solve the problems of poor selectivity and stability of single carbon material gas-sensing films, achieve excellent gas-sensing performance, and improve gas-sensing properties. Characteristics and stability, the effect of good and stable performance

Active Publication Date: 2014-07-02
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0007] The purpose of the present invention is to provide an orderly and controllable binary carbon material-conductive polymer self-assembled composite nano gas-sensitive film and its preparation method, imp

Method used

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  • Binary carbon material-conductive polymer composite nano gas-sensitive thin film and preparation method thereof
  • Binary carbon material-conductive polymer composite nano gas-sensitive thin film and preparation method thereof
  • Binary carbon material-conductive polymer composite nano gas-sensitive thin film and preparation method thereof

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Embodiment 1

[0055] ① The gold interdigitated electrode is used as the substrate; the substrate is ultrasonically cleaned in acetone, ethanol and deionized water for 10 minutes, and dried with nitrogen;

[0056] ② Place the substrate in a volume ratio of 1:1:5 ammonia water / hydrogen peroxide / water solution for 30 minutes to make the surface of the substrate hydrophilic;

[0057] ③ Take 2ml of polydiallyl ammonium chloride (PDDA) standard solution with a concentration of 20%wt, prepare 40ml of polycationic electrolyte PDDA aqueous solution with a concentration of 1%wt, and ultrasonicate for 10min for later use; take 0.1g poly(p-styrene Sodium sulfonate) (PSS), add 47.5ml of deionized water and 2.5ml of 2mol / L hydrochloric acid solution to make polyanion electrolyte PSS aqueous solution, ultrasonic for 10min for later use;

[0058] ④ Weigh 0.5mg of graphene nanosheets and single-walled carbon nanotubes respectively, add 5ml of deionized water to prepare the aqueous dispersion of binary carbo...

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Abstract

The invention discloses a binary carbon material-conductive polymer composite nano gas-sensitive thin film and a preparation method thereof. The binary carbon material-conductive polymer composite nano gas-sensitive thin film is a composite thin film formed by self-assembling a binary carbon material and a conductive polymer material through chemical polymerization, the binary carbon material is a combination of any of a graphene material and a carbon nanotube as well as a carbon nanofiber, nano porous carbon or nano graphite. The composite nano thin film with excellent gas-sensitive characteristic can be prepared by fully utilizing the excellent conductivity and high specific surface area of the carbon nano material and the peculiar response characteristic of the conductive polymer, playing the synergistic and supplementary roles generated among different materials and combining an orderly controllable self-assembled film forming method. The binary carbon material-conductive polymer composite nano gas-sensitive thin film and the preparation method thereof can open up a new approach for the sensitive thin film for a gas sensor which is high in performance, low in cost and capable of working at room temperature.

Description

technical field [0001] The invention relates to the field of composite nanomaterials and thin film technology, in particular to a binary carbon material-conductive polymer self-assembled composite nanometer gas-sensitive thin film and a preparation method thereof. Background technique [0002] As a new type of gas-sensing material, graphene has bright application prospects in the field of gas sensors due to its large specific surface area, unique carrier characteristics and excellent electrical properties; at the same time, various carbon nanomaterials, such as carbon nanotubes, Carbon nanofibers, nanoporous carbon, or nanographite, etc., have become one of the most promising gas-sensing materials due to their rich pore structure and high specific surface area. Gas sensors based on different carbon materials have high sensitivity and low detection limit, but poor selectivity; at the same time, the excellent chemical properties of the gas-sensitive film also depend on the goo...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08K7/00C08K3/04C08J5/18C08G73/06C08G61/12
Inventor 太惠玲郭宁杰叶宗标徐晓颖何应飞蒋亚东
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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