CN2906611Y - Vanadium oxide nanometer tube gas sensitive sensor - Google Patents
Vanadium oxide nanometer tube gas sensitive sensor Download PDFInfo
- Publication number
- CN2906611Y CN2906611Y CN 200520049758 CN200520049758U CN2906611Y CN 2906611 Y CN2906611 Y CN 2906611Y CN 200520049758 CN200520049758 CN 200520049758 CN 200520049758 U CN200520049758 U CN 200520049758U CN 2906611 Y CN2906611 Y CN 2906611Y
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- gas
- vanadium oxide
- nanotube
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Abstract
The utility model discloses a vanadium oxide nanotube gas sensor, which comprises an insulating ceramic substrate (1), a vanadium oxide nanotube gas-sensing layer (2) and two metal wires (3) which leaded from each end of the ceramic substrate. When contacted with the nitric oxide, the nitrogen dioxide, oxygen, the carbon monoxide and other gases, the different measured gases physically or chemically are absorbed and desorbed on the gas sensing materials to cause different changes of the electrical properties of the materials, which implements the target of detecting the type and the concentration of the gases. As the nanotube has the advantages of a hollow structure and a large wall surface area and provides a plurality of gas channels and has great adsorption capacity to gas, the utility model greatly improves the sensitivity, greatly reduces the work temperature, normally works under the room temperature, and also reduces the size of the sensor. A plurality of experiments discloses that the utility model has the advantages of high sensitivity, high selectivity, and high stability to different gases, simple structure, mature production, easy-to-use, and low price.
Description
Technical field
The utility model relates to a kind of vanadium oxide nanotube gas sensor.
Background technology
At present, people have following several to the detection means main method of gas: analysis of thermal conductivity (being usually used in gas chromatographic analysis), the analysis of magnetic-type oxygen, electron capture analysis, uv absorption analysis, Fibre Optical Sensor, chemical analysis, chemiluminescence formula gas sensor, semiconductor gas sensor, electrochemical transducer[sensor.In numerous analytical equipments, some equipment are as chemiluminescence formula gas analyzer etc., though have advantages such as detection sensitivity height, accuracy are strong, since bulky, can not be used for on-the-spot monitoring in real time, and cost an arm and a leg, so its application is very limited; The metal oxide semiconductor gas sensor because it has advantages such as sensitivity is higher, response is fast, and has obtained using widely.But less stable, the working temperature great majority need heating arrangement more than 300 ℃, generally can only be used as alarm.
At present, very active both at home and abroad to the research of new gas sensitive and gas sensor, developing direction mainly concentrate on following some: 1. develop new gas sensitive.Make these materials have high sensitivity, high selectivity, high stability to gas with various; 2. develop new gas sensor, make sensor microminiaturization and multifunction more, and have stable performance, easy to use, lower-price characteristic; 3. adopt computer technology to realize the intellectuality of gas sensor.
Summary of the invention
The purpose of this utility model provides a kind ofly has high sensitivity, high selectivity, high stability to gas with various, and easy to use, cheap gas sensor.
For achieving the above object, sensor of the present utility model adopts the metal oxide semiconductor nanotube as gas sensitive (as the vanadium oxide nanotube), adopt conventional spraying coating process, gas sensitive is sprayed directly into two ends to be had on the insulating ceramics substrate of metal lead wire, gets final product after the drying.Its principle of work is: when metal oxide semiconductor contacts with gases such as nitrogen monoxide, nitrogen dioxide, oxygen, carbon monoxide, different gas to be measured carries out physics on gas sensitive or chemistry is inhaled, desorption, different variations takes place in the electrical properties that causes material, thereby reaches the purpose of detected gas kind and gas concentration.And nanotube has hollow structure and big wall surface amasss, and a large amount of gas passages is provided, and gas is had very big adsorptive power, thereby improved sensitivity greatly, greatly reduce the working sensor temperature, get final product operate as normal under the room temperature, also dwindled the size of sensor.
The utility model compared with the prior art, initiative adopts the metal oxide semiconductor nanotube as gas sensitive, experiment showed, that it has high sensitivity, high selectivity, high stability to gas with various, and simple in structure, manufacture craft is ripe, easy to use, cheap.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Description of drawings
Fig. 1 is the cut-open view of vanadium oxide nanotube gas sensor embodiment of the present utility model.
Vanadium oxide nanotube sensor shown in Figure 1 is made up of insulating ceramics substrate 1, gas sensing layer 2 and metal lead wire 3.
Embodiment
Plate metal lead wire (3) at the two ends of insulating ceramics substrate (1), at the even coated with adhesive in ceramic substrate (1) surface, again vanadium oxide nanotube gas sensitive is evenly shootd out on tackifier then, form gas sensing layer (2), get final product after the drying.
Certainly, the gas sensitive of this nanotube gas sensor can also adopt other metal oxide semiconductor nanotube, such as: nanotubes such as tin ash, zinc paste, di-iron trioxide.Equally, the insulating ceramics substrate also can be made different shapes and size as required.
Claims (3)
1. vanadium oxide nanotube gas sensor, the metal lead wire (3) of respectively drawing one by insulating ceramics substrate (1), vanadium oxide nanotube gas sensing layer (2) with from the ceramic substrate two ends is formed, it is characterized in that vanadium oxide nanotube gas sensitive is painted on two ends to be had on the insulating ceramics substrate of metal lead wire, gets final product after the drying.
2. vanadium oxide nanotube gas sensor according to claim 1, it is characterized in that, gas sensitive adopts the metal oxide semiconductor nanotube as gas sensitive, and these metal oxide semiconductor nanotubes are vanadium oxide nanotube, tin dioxide nanometer tube, zinc oxide nano mitron and di-iron trioxide nanotube.
3. vanadium oxide nanotube gas sensor according to claim 1 is characterized in that described substrate made by insulating ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520049758 CN2906611Y (en) | 2005-04-12 | 2005-04-12 | Vanadium oxide nanometer tube gas sensitive sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520049758 CN2906611Y (en) | 2005-04-12 | 2005-04-12 | Vanadium oxide nanometer tube gas sensitive sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2906611Y true CN2906611Y (en) | 2007-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520049758 Expired - Fee Related CN2906611Y (en) | 2005-04-12 | 2005-04-12 | Vanadium oxide nanometer tube gas sensitive sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN2906611Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388191A (en) * | 2015-11-19 | 2016-03-09 | 天津大学 | Preparation method of ceramic-based vanadium oxide nano rod structured room temperature CH4 sensor |
| CN105486723A (en) * | 2015-11-19 | 2016-04-13 | 天津大学 | Preparation method for room temperature NO2 sensor with ceramic-based vanadium oxide nanorod structure |
| CN109527680A (en) * | 2018-12-03 | 2019-03-29 | 武汉市银莱制衣有限公司 | Have antibacterial, antistatic, monitoring poisonous gas and mine protective garment fabric of toxic dust filtering synergistic function and preparation method thereof |
| CN114235903A (en) * | 2020-09-09 | 2022-03-25 | 中国科学院苏州纳米技术与纳米仿生研究所 | Gas sensor and manufacturing method thereof |
-
2005
- 2005-04-12 CN CN 200520049758 patent/CN2906611Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388191A (en) * | 2015-11-19 | 2016-03-09 | 天津大学 | Preparation method of ceramic-based vanadium oxide nano rod structured room temperature CH4 sensor |
| CN105486723A (en) * | 2015-11-19 | 2016-04-13 | 天津大学 | Preparation method for room temperature NO2 sensor with ceramic-based vanadium oxide nanorod structure |
| CN109527680A (en) * | 2018-12-03 | 2019-03-29 | 武汉市银莱制衣有限公司 | Have antibacterial, antistatic, monitoring poisonous gas and mine protective garment fabric of toxic dust filtering synergistic function and preparation method thereof |
| CN109527680B (en) * | 2018-12-03 | 2021-06-01 | 武汉市银莱制衣有限公司 | Mine protective clothing fabric with antibacterial, antistatic and toxic gas monitoring and dust and toxin filtering synergistic functions and preparation method thereof |
| CN114235903A (en) * | 2020-09-09 | 2022-03-25 | 中国科学院苏州纳米技术与纳米仿生研究所 | Gas sensor and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070530 |