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Planar flexible room-temperature NO<2> sensor based on three-dimensional MXene folded ball/ZnO composite material and preparation method thereof

A composite material and sensor technology, used in material resistance, material analysis, material analysis by electromagnetic means, etc., can solve problems such as unfavorable gas sensing, aggregation, loss of large specific surface area, etc., and achieve large specific surface area and low operating temperature. , the effect of improving the sensing performance

Active Publication Date: 2020-01-10
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MXene (Ti 3 C 2 T x ) has good dispersibility in water, but MXene will seriously aggregate after drying and lose its advantage of large specific surface area, which is not conducive to gas sensing

Method used

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  • Planar flexible room-temperature NO&lt;2&gt; sensor based on three-dimensional MXene folded ball/ZnO composite material and preparation method thereof
  • Planar flexible room-temperature NO&lt;2&gt; sensor based on three-dimensional MXene folded ball/ZnO composite material and preparation method thereof
  • Planar flexible room-temperature NO&lt;2&gt; sensor based on three-dimensional MXene folded ball/ZnO composite material and preparation method thereof

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Embodiment 1

[0042] The three-dimensional MXene wrinkled ball / ZnO composite material is used as the sensitive electrode material to fabricate a planar flexible room temperature gas sensor. The fabrication process is as follows:

[0043] (1) Preparation of two-dimensional MXene material: weigh 1 gram of Ti 3 AlC 2 Slowly add 40mL of concentrated hydrochloric acid (36% by mass) and 1 gram of LiF into a 50mL PET bottle, stir and react in a water bath at 40°C for 24 hours, and the product after the reaction is washed and centrifuged repeatedly with deionized water until the supernatant The liquid pH is 6. Add the clay-like precipitate in the lower layer to 60 mL of deionized water, sonicate in an ice bath in a column ultrasonic machine for 1 hour, and finally centrifuge at a speed of 3000 rpm for 1 hour, take the upper layer liquid, and obtain the MXene dispersion. Measure 10mL of the MXene dispersion for suction filtration, place the MXene sheet obtained by suction filtration in a vacuum ov...

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Abstract

The invention discloses a planar flexible room-temperature NO<2> sensor based on a three-dimensional MXene folded ball / ZnO composite material and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor is composed of a polyimide flexible substrate having an Au interdigital electrode and three-dimensional MXene folded ball / ZnO composite material sensitive electrodes prepared on the interdigital electrode and the substrate. According to the planar flexible room-temperature NO<2> sensor based on the three-dimensional MXene folded ball / ZnO composite material andthe preparation method thereof provided by the invention, with the MXene material as a basis, the MXene is treated via an ultrasonic spraying method to prepare the anti-aggregating three-dimensionalMXene folded ball, thus achieving the advantages of being anti-aggregating, and maintaining a large specific surface area of the MXene; meanwhile, the oxidation is composited, and a ZnO nanoparticle is increased on a surface of the three-dimensional MXene folded ball, so that a sensing site is increased; and compared with a two-dimensional MXene and pure three-dimensional MXene folded ball, the sensor prepared based on the three-dimensional MXene folded ball / ZnO composite material obtains higher NO<2> sensing property, and has very good selectivity, resilience and bendability.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a planar flexible room temperature NO sensor with three-dimensional MXene wrinkled ball / ZnO composite material as a sensitive electrode. 2 The sensor and its preparation method are mainly used for wearable nitrogen dioxide detection. Background technique [0002] MXenes is a new type of two-dimensional material, which is the abbreviation of two-dimensional transitional Au carbides, nitrides and carbonitrides. The name comes from its preparation process and properties. Using MAX ceramic material as the raw material (M represents the transition Au metal, such as titanium, vanadium, chromium, manganese, A represents the intermediate sacrificial layer, X represents C or N elements), and is etched with a strong acid corrosive liquid to remove the sacrificial layer A, and then obtained "MX". Through ion intercalation and sonication, "MX" was dispersed into two-dimensional flakes,...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 刘方猛杨子杰卢革宇段羽闫旭孙鹏
Owner JILIN UNIV
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