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A two-dimensional mxene material processing method, product and gas sensor

A technology of gas sensor and processing method, which is applied in the field of gas sensor and two-dimensional MXene material processing, to achieve the effect of increasing specific surface area, improving gas sensing performance and meeting precision requirements

Active Publication Date: 2021-07-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of microwave plasma to activate and treat MXene materials to improve their gas-sensing properties.

Method used

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  • A two-dimensional mxene material processing method, product and gas sensor
  • A two-dimensional mxene material processing method, product and gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take the Ti after liquid phase etching 3 C 2 3g was placed in ethanol solution, and ultrasonically treated for 18min. Add the mixture dropwise to the Al 2 o 3 placed on a ceramic sheet, placed in an oven at 60°C, and dried for 10 hours before use. Will dry well with Ti 3 C 2 The ceramic sheet was placed in the microwave plasma equipment, the microwave power was set to 1900W, the pressure was adjusted to 2.5KPa, and oxygen was introduced, and the oxygen volume fraction was 100%. Two-dimensional layered Ti with high oxygen and low fluorine functional groups 3 C 2 The material is a gas sensor of a sensitive material.

Embodiment 2

[0044] Take the Ti after liquid phase etching 3 C 2 3g was placed in ethanol solution, and ultrasonically treated for 18min. Put the mixture in an oven at 60°C, dry it for 10 hours, and set it aside. The dried material is placed in a microwave plasma equipment, the microwave power is set to 1900W, the pressure is adjusted to 2.5KPa, oxygen is introduced, and the oxygen volume fraction is 100%, so that the sample is treated at 500°C in oxygen microwave plasma for 1h, Obtaining two-dimensional layered Ti with high oxygen and low fluorine functional groups 3 C 2 Material.

[0045] The two-dimensional layered Ti with high oxygen and low fluorine functional groups obtained above 3 C 2 The material was placed in an ethanol solution and ultrasonically treated for 18 minutes; the resulting mixture was added dropwise to an Al 2 o 3 placed on a ceramic sheet in an oven at 60°C, and dried for 10 hours to obtain a two-dimensional layered Ti layer with high oxygen and low fluorine...

Embodiment 3

[0047] Take the Ti after liquid phase etching 2 C 4g was placed in ethanol solution and treated with ultrasound for 10min. Add the mixture dropwise to the Al 2 o 3 placed on a ceramic sheet, placed in an oven at 70°C, and dried for 9 hours before use. Will dry well with Ti 2 The ceramic sheet of C is placed in the microwave plasma equipment, the microwave power is set to 1800W, the pressure is adjusted to 3KPa, and oxygen is introduced, and the oxygen volume fraction is 70%, so that the sample is treated at 400°C in oxygen microwave plasma for 1h, and the following is obtained. Two-dimensional layered Ti with high oxygen and low fluorine functional groups 2 C material is a gas sensor of sensitive material.

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Abstract

The invention discloses a processing method and product of a two-dimensional MXene material and a gas sensor. The processing method includes the following steps: using a fluorine-containing compound solvent as an etching solvent, and using a liquid-phase etching method to obtain The two-dimensional MXene material is placed in an organic solvent, ultrasonically treated, and then dried; the dried MXene material is subjected to microwave oxygen plasma treatment to obtain the two-dimensional MXene material. Microwave oxygen plasma treatment of two-dimensional MXene materials, on the one hand, effectively increases the specific surface area of ​​the material; on the other hand, it makes the material have more oxygen functional groups, which provides more oxygen activity for the material in the gas-sensing performance test. site, thereby improving the gas-sensing performance. The MXene gas-sensing material obtained by the invention has high selectivity and stability, and the response value to 100ppm ethanol gas can reach 22.47% at 25°C.

Description

technical field [0001] The invention belongs to the technical field of gas-sensitive materials, and in particular relates to a processing method and product of a two-dimensional MXene material and a gas-sensitive sensor. Background technique [0002] With the development of industry and social economy, volatile organic compounds (Volatile organic compounds, VOCs) have become the main pollutants in the indoor environment that affect human health, and even some VOCs gases are characteristic markers that reflect human diseases. Therefore, the development of highly sensitive, The highly selective and stable VOCs gas sensor has broad application prospects in the fields of indoor pollution monitoring and early diagnosis of major diseases. [0003] Currently, metal oxide semiconductors with high sensitivity, low cost and simple functions are widely studied as the core materials for VOCs sensors. Co-doped SnO was synthesized by electrospinning process by Kou et al. 2 Nanofibers. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12C01B32/921C01B32/914C01B21/06
CPCC01B21/062C01B32/914C01B32/921G01N27/125
Inventor 杨黎侯明郭胜惠高冀芸胡途
Owner KUNMING UNIV OF SCI & TECH