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Planar humidity and ammonia sensor based on alkalized organ-shaped mxene sensitive material and preparation method thereof

An ammonia sensor and sensitive material technology, applied in the direction of material resistance, etc., can solve the problems of unstable organ-shaped structure, shaking and dispersion, etc., and achieve the improvement of humidity sensing and ammonia sensing performance, low operating temperature, and low power consumption. Effect

Active Publication Date: 2020-12-18
JILIN UNIV
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Problems solved by technology

The preparation method using fluorine salt plus hydrochloric acid as the etching solution can obtain a denser layered structure, but its organ-like structure is unstable, and part of it may be dispersed by shaking.

Method used

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  • Planar humidity and ammonia sensor based on alkalized organ-shaped mxene sensitive material and preparation method thereof
  • Planar humidity and ammonia sensor based on alkalized organ-shaped mxene sensitive material and preparation method thereof
  • Planar humidity and ammonia sensor based on alkalized organ-shaped mxene sensitive material and preparation method thereof

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Embodiment 1

[0033] Organ-shaped Ti after alkalization treatment 3 C 2 T x Materials are used as sensitive electrode materials to make humidity and ammonia sensors. The manufacturing process is as follows:

[0034] (1) Preparation of alkalized organ-like Ti 3 C 2 T x : Weigh 1 gram of Ti 3 AlC 2 Slowly add 20 mL of hydrofluoric acid (mass fraction: 45%) into a 100 mL polytetrafluoroethylene bottle, stir and react in an oil bath at 60°C for 24 hours, and the product after the reaction is washed and centrifuged repeatedly with deionized water until the above The serum pH was 6. Finally, the lower precipitate was dispersed in absolute ethanol and dried in a vacuum oven at 80 °C for 12 hours to collect the final organ-like Ti 3 C 2 T x powder. Prepare 100 mL of high-concentration sodium hydroxide solution with a concentration of 2 mol / L in a plastic beaker. Weigh 0.3 g organoid Ti 3 C 2 T x The powder was added to the sodium hydroxide solution and stirring was continued for 2 ho...

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Abstract

The invention belongs to the technical field of gas-humidity sensitive sensors and relates to a planar humidity-ammonia gas sensor based on alkalized organ-like MXene (Ti3C2Tx, with T representing surface basic group terminals and x valuing from a ratio of surface terminals) sensitive material and preparation method thereof. The planar humidity-ammonia gas sensor is composed of an Al2O3 ceramic base plate with an Au / Ni interdigital electrode and an alkalized organ-like MXene (Ti3C2Tx) sensitive material applied evenly to the interdigital electrode and the ceramic base plate by dripping. Basedon the organ-like MXene material, surface F terminals are removed and sodium ions are inserted by alkalizing the organ-like MXene material. pre-alkalization and post-alkalization gas-humidity sensitivities are compared to obtain a device having better humidity and ammonia gas sensitivities. The sensor prepared herein has MXene gas-humidity sensitive response which is the highest up to now, and hasgood selectivity.

Description

technical field [0001] The invention belongs to the technical field of gas and humidity sensors, and in particular relates to a planar humidity and NH 3 A sensor and a preparation method thereof are mainly used for detecting ambient humidity and ammonia gas. Background technique [0002] The Internet of Things (IoT) is one of the fastest growing information technologies in the world. As the front end of information collection, the importance and demand of sensors are increasingly prominent. Currently, there are various types of sensors for environmental monitoring and physiological detection. Among them, chemical gas sensors based on special detection mechanisms are receiving more and more attention in monitoring toxic and harmful gases in the atmospheric environment and monitoring respiratory marker gases in medical diagnosis and treatment. Therefore, as an important information acquisition device developed in the era of big data, gas sensors have broad application prosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04
Inventor 刘方猛杨子杰卢革宇段羽孙鹏闫旭马健高原梁喜双刘凤敏
Owner JILIN UNIV
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