Cobaltosic oxide nanowire array based alcohol gas sensor and preparation method thereof

A technology of cobalt trioxide nanometer and gas sensor, which is applied in the direction of material resistance, can solve the problems of cumbersome production process and expensive processing cost, and achieve the effects of low equipment requirements, favorable adsorption and desorption, and short production cycle

Inactive Publication Date: 2013-07-24
ZHEJIANG UNIV
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Problems solved by technology

[0006] Aiming at the technical problems such as cumbersome production process and high processing cost of existing gas sensors, the present invention applies cobalt tetr...

Method used

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  • Cobaltosic oxide nanowire array based alcohol gas sensor and preparation method thereof
  • Cobaltosic oxide nanowire array based alcohol gas sensor and preparation method thereof
  • Cobaltosic oxide nanowire array based alcohol gas sensor and preparation method thereof

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] The chemicals used in the experiment were commercially available analytically pure.

[0038] Preparation of alcohol gas sensor:

[0039] (1) Use magnetron sputtering to deposit a silver film on both ends of the quartz polycrystalline alumina ceramic sheet. The thickness of the film is 90-100 nanometers. The target material for sputtering is silver. The sputtering power is 100 watts and the sputtering pressure is 0.9 Pa.

[0040] (2) Mix and stir cobalt nitrate, ammonium fluoride, hexamethylenetetramine and water with a molar ratio of 1:1:5 at room temperature to obtain a uniformly mixed solution, and move the solution into a polytetrafluoroethylene liner In a stainless steel high-pressure reactor made of ethylene, the filling degree of the reactor is 50%, and the insulating substrate plated with electrodes and cleaned is placed in the ...

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Abstract

The invention discloses a cobaltosic oxide nanowire array based alcohol gas sensor. The alcohol gas sensor includes an insulating substrate, an electrode layer and a sensing electric conductor. The sensing electric conductor is composed of a cobaltosic oxide nano-array grows on the insulating substrate directly by a hydrothermal method. The invention also provides a preparation method of the alcohol gas sensor. The method includes: first employing the well-known thermal evaporation, sputtering or chemical evaporation deposition coating technology to deposit an electrode layer material on both ends of the insulating substrate, and controlling the thickness; and then making use of the hydrothermal method to let the cobaltosic oxide nano-array grow on the insulating substrate directly to serve as the sensing electric conductor of the gas sensor. The preparation process can generate the product with good crystallinity, has a short production period and no pollution, and avoids the difficulty of dispersing or manipulating a nano-material, thus being convenient for industrialized production. And the obtained gas sensor has excellent sensitivity to alcohol detection, and shows good selectivity, stability and repeatability.

Description

technical field [0001] The invention belongs to the technical field of electronic gas-sensing devices, and in particular relates to an alcohol gas sensor based on a cobalt trioxide nanowire array and a preparation method thereof. Background technique [0002] With the rapid development of our country's economic level and residents' living standards in recent years, the share of private cars has risen sharply, and at the same time, frequent traffic accidents, especially those caused by drunk driving, have caused serious harm to ourselves and others. People's lives and properties are threatened, and it also brings serious economic losses to the country and society. At the same time, from factories and enterprises to residents' families, the detection and monitoring of alcohol leakage are very important and indispensable to the personal and property safety of residents. Therefore, the alcohol concentration detector has very broad practical application value and potential marke...

Claims

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Application Information

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IPC IPC(8): G01N27/12
Inventor 朱丽萍文震梅伟民李亚光胡亮郭艳敏蒋杰
Owner ZHEJIANG UNIV
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