High-performance gas sensor

A gas sensor, sensor technology, applied in the direction of material resistance

Inactive Publication Date: 2012-07-25
BEIJING ZHONGKE MICRO NANO NETWORKING SCI TECH
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Problems solved by technology

In the preparation methods of one-dimensional sensitive nanomaterials, there are mainly complicated methods such as thermal evaporation method (high temperature), hydrothermal method (high temperature and high pressure) or high-voltage electrospinning (high voltage), and the low energy consumption method of normal temperature and pressure prepares a Work on dimensionally sensitive nanomaterials has yet to be reported

Method used

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Embodiment Construction

[0015] Raw materials for material preparation: zinc acetate, sodium hydroxide, sodium citrate, ethylenediamine, absolute ethanol, deionized water, lanthanum nitrate.

[0016] Equipment used for material preparation: 50mL beaker, 250mL beaker, measuring cylinder, glass rod, key, rubber dropper, magnetic stirrer, high-speed centrifuge.

[0017] This patent application simply prepares ZnO nanomaterials under normal temperature and pressure conditions, and prepares doped La 2 o 3 ZnO nanomaterials. The prepared gas sensor is very sensitive to alcohol gas and can be used as an alcohol detector for traffic police. The gas sensor prepared by the latter material has higher sensitivity and faster response / recovery time for the detection of alcohol gas. The gas sensor made of the latter material has higher sensitivity to acetone gas, and can selectively detect acetone gas in industrial production. Therefore, the experimentally prepared La-doped 2 o 3 ZnO nanomaterials have potenti...

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Abstract

The invention relates to a high-performance gas sensor, which is characterized by comprising the following steps of preparing a sensitive material of a sensor, designing and manufacturing a sensor structure, and measuring and representing a sensor. The sensitive material is prepared at normal temperature and normal pressure mainly by regulating a chemical balance method, wherein the specific chemical reaction is as follows: equations as shown in an original PDF, and zinc acetate contains Zn<2+> ions and can be dissolved in strong alkaline solution. On the presence of a large amount of hydroxyl radicals, Zn(OH)4<2-> can be generated, which can be seen in an equation (1). A matter Zn(OH)4<2-> has high chemical energy in neutral solution, is unstable and carries out a spontaneous reaction to generate low-energy and stable Zn(OH)2. Absolute ethyl alcohol is added and H<+> is provided so that the H<+> and excessive OH<-> generate a neutralization reaction, and a solution changes from alkaline to be neutral; and simultaneously, the chemical equation moves rightwards to generate Zn(OH)2, which can be seen in an equation (2). According to a sensitive material coating method, different structures of gas sensors are manufactured, including bypass type gas sensors, plane type gas sensors and the like.

Description

technical field [0001] The patent of the present invention relates to a high-performance gas sensor, including the preparation of sensitive materials for the sensor, the design and preparation of the sensor structure, and the measurement and characterization of the sensor. Background technique [0002] With the improvement of living standards, people began to take preventive measures against environmental pollution, gas leaks, gas explosions, etc. This requires gas sensors with reliable performance. Acetone, ethanol, methanol, ammonia, etc. are common toxic gases in production workshops. If the prepared gas sensors can be widely used in these production workshops, it will bring great protection to the safety of workers. In addition, since the sensor has high sensitivity and selectivity for a specific gas, the sensor can also be artificially set as a sensor for detecting a specific gas with high accuracy. [0003] Most of today's traffic accidents are caused by drunk drivin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
Inventor 王仲祺许志徐军
Owner BEIJING ZHONGKE MICRO NANO NETWORKING SCI TECH
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