Gas sensor array for detecting indoor gas pollution

A gas sensor and gas pollution technology, applied in the field of gas sensors and arrays, can solve problems such as false alarms, low selectivity, and non-discovery

Inactive Publication Date: 2004-11-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the currently used gas sensors use tin dioxide as a sensitive material, but there are problems such as low selectivity and prone to false alarms
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  • Gas sensor array for detecting indoor gas pollution
  • Gas sensor array for detecting indoor gas pollution
  • Gas sensor array for detecting indoor gas pollution

Examples

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[0010] As shown in Figure 1, it is a gas sensor array for detecting indoor gas pollution composed of 5 indium tin oxide thin film gas sensors with different indium tin ratios. Their indium / tin atomic ratios are 0.10, 0.20, 0.40, 0.60, 0.70, respectively. .

[0011] Indium tin oxide films with different indium tin ratios are prepared by the sol-gel method. SnCl 2 ·2H 2 O and InCl 3 ·4H 2 O is the raw material, dissolve the raw material into a certain amount of absolute ethanol, and add a certain amount of glacial acetic acid. The solution is heated while stirring for 2 hours, the stirring and heating temperature is controlled at 60 ℃, and then stored at room temperature for 1-2 days. Obtain a uniform and transparent solution. The solution obtained by the above method is coated with a wet film on the hollow ceramic column where the gold electrode is prepared in advance. After the two-step pretreatment of 80 degrees and 180 degrees, it can be obtained on the hollow ceramic column aft...

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Abstract

The gas sensor array for detecting indoor gaseous pollutant consists of several In-Sn oxide film gas sensors with different In/Sn atom ratio within 0-1.0. The sensors with different In/Sn atom ratio have different response to gases, so that the gas sensor array has greatly raised gas selectivity and may be used in identifying benzene, toluene, xylene, formaldehyde and other common indoor pollutant gases.

Description

technical field [0001] The invention relates to a gas sensor and an array for detecting indoor harmful gas. Background technique [0002] Tin oxide is a semiconductor material with a wide range of uses, and has been widely used in gas sensors, transparent conductive films, and other optoelectronic devices. Most of the currently used gas sensors use tin dioxide as a sensitive material, but there are problems such as low selectivity and prone to false alarms. According to the search, there is no report on using a plurality of indium tin oxide thin film gas sensors with different indium tin ratios to form a gas sensor array. Contents of the invention [0003] The object of the present invention is to provide a gas sensor array with high selectivity and capable of detecting several indoor gas pollutions. [0004] The gas sensor array for detecting indoor gas pollution of the present invention is characterized in that the ar...

Claims

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Application Information

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IPC IPC(8): G01N27/62
Inventor 季振国孙兰侠何振杰
Owner ZHEJIANG UNIV
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