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Preparation method for acetone gas sensor

An acetone gas sensor and sensor technology, which is applied to the preparation of gas sensors and the field of preparation of acetone gas sensors, can solve the problems of high working temperature and high power consumption, and achieve fast response recovery time and good gas sensor selectivity. Effect

Inactive Publication Date: 2014-03-26
中国人民解放军白求恩医务士官学校
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Problems solved by technology

The oxides currently used for acetone vapor sensitive materials mainly include ZnO, SnO 2 , Ga 2 o 3 , CeO 2 , NiO, etc., most of the acetone gas sensors made have the defects of high working temperature and high power consumption

Method used

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  • Preparation method for acetone gas sensor
  • Preparation method for acetone gas sensor
  • Preparation method for acetone gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Embodiment A kind of preparation method of acetone gas sensor

[0024] The acetone gas sensor adopts a side-heating device structure, with an alumina ceramic tube as a carrier, a platinum wire as a noble metal electrode lead, and an alumina ceramic tube as a sensitive element tube, which is coated with tin dioxide and polypyrrole hybrid. Material.

[0025] 1. Synthesis of tin dioxide and polypyrrole hybrid materials

[0026] 1. Synthesis method one

[0027] Take 50ml of distilled water and adjust its H with hydrochloric acid + The concentration is about 1mol / L, add 1mg of pyrrole, and ultrasonically disperse the solution for 30min. Another 95 mg of tin dioxide was added. After the mixture was stirred and ultrasonicated for 30 minutes, it was transferred to a reaction kettle, and 2.42 mg of ferric chloride was added. Place the reaction kettle in an oven at 140°C for 8 hours of hydrothermal reaction. After the reaction is complete, take out the reaction kettle and co...

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Abstract

The invention discloses a preparation method for an acetone gas sensor. According to the preparation method, a series of tin dioxide and polypyrrole hybrid materials with different polypyrrole mass percents are prepared by using a simultaneous reaction of a hydrothermal method and a polymer in-situ generation method; the tin dioxide and polypyrrole hybrid materials are used for coating a heater-type device structure and an aluminum oxide ceramic tube is used as a carrier to prepare the acetone gas sensor; a noble metal electrode lead wire is a platinum wire and a sensing element tube core is the aluminum oxide ceramic tube. The method disclosed by the invention is good for finishing a reaction in one step and easily purifying a product. The gas sensor prepared by the method has good gas sensing selectivity on acetone gas under a low working environment; the recovery time can be rapidly responded; meanwhile, the interferences caused by hydrogen, carbon monoxide and ammonia gas can also be eliminated.

Description

[0001] technical field [0002] The invention relates to a method for preparing a gas sensor, in particular to a method for preparing an acetone gas sensor, and belongs to the technical field of gas sensor manufacturing. Background technique [0003] As a commonly used chemical substance, acetone is mainly used as raw material for organic synthesis, solvent in cosmetics, solvent and extractant in industrial production, etc. Since acetone is volatile, toxic, and explosive, monitoring it can improve the accuracy of real-time prediction of accidents, continuously eliminate hidden dangers of accidents, and reduce accidents, especially major accidents. The gas sensor used to monitor acetone in the prior art is constructed by modifying the oxide by doping or the like. The oxides currently used for acetone vapor sensitive materials mainly include ZnO, SnO 2 , Ga 2 o 3 , CeO 2 , NiO, etc. Most of the acetone gas sensors made have the defects of high working temperature and high...

Claims

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Application Information

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IPC IPC(8): G01N27/60
Inventor 许光军王志玲耿丽娜徐忠华戎文慧
Owner 中国人民解放军白求恩医务士官学校
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