CN107219287A - Ionic liquid electrochemical gas sensor - Google Patents
Ionic liquid electrochemical gas sensor Download PDFInfo
- Publication number
- CN107219287A CN107219287A CN201710509887.0A CN201710509887A CN107219287A CN 107219287 A CN107219287 A CN 107219287A CN 201710509887 A CN201710509887 A CN 201710509887A CN 107219287 A CN107219287 A CN 107219287A
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- electrode
- ionic liquid
- base
- electrochemical gas
- gas sensor
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- 239000002608 ionic liquid Substances 0.000 title claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229920000742 Cotton Polymers 0.000 claims abstract description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 14
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 15
- -1 1- butyl -3- methylimidazoles bromide Chemical class 0.000 claims description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 239000011267 electrode slurry Substances 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 239000012876 carrier material Substances 0.000 claims description 4
- 229910000510 noble metal Inorganic materials 0.000 claims description 4
- KAIPKTYOBMEXRR-UHFFFAOYSA-N 1-butyl-3-methyl-2h-imidazole Chemical compound CCCCN1CN(C)C=C1 KAIPKTYOBMEXRR-UHFFFAOYSA-N 0.000 claims description 3
- OIWSIWZBQPTDKI-UHFFFAOYSA-N 1-butyl-3-methyl-2h-imidazole;hydrobromide Chemical class [Br-].CCCC[NH+]1CN(C)C=C1 OIWSIWZBQPTDKI-UHFFFAOYSA-N 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 230000005518 electrochemistry Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims description 2
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 description 11
- 239000003792 electrolyte Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 229910001120 nichrome Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/413—Concentration cells using liquid electrolytes measuring currents or voltages in voltaic cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention provides a kind of ionic liquid electrochemical gas sensor, the sensor includes sensor dust cover, upper lid, electrode, metal lead wire, the drain cotton for being adsorbed with ionic liquid and base；Air admission hole is opened up on the dust cap, the upper lid opens up venthole, and the dust cap lid is located on the upper lid and with the upper cap-shaped into air chamber, and the air admission hole connects the air chamber with the venthole；The base is the accommodating cavity of upper opening, and the drain cotton, the metal lead wire, the electrode and the upper lid are sequentially arranged in the accommodating cavity from bottom to top；Conductive strips are provided with the base, the metal lead wire connects the electrode and the conductive strips.Ionic liquid electrochemical gas sensor of the present invention has the advantages that stability is good, temperature coefficient is small compared to traditional electrochemical gas sensor, it is hot and humid under the conditions of anti-leakage ability it is strong.
Description
Technical field
The present invention relates to a kind of electrochemical gas sensor, specifically, a kind of ionic liquid electrochemical gas relate to
Sensor.
Background technology
Conventional electrochemical gas sensor typically uses the aqueous solution of inorganic acid, salt as electrolyte, due to such electricity
Solve liquid volatile in atmosphere, so the decay of sensor performance is caused due to the volatilization of electrolyte in use, from
And the reliability of the sensor influenceed.
In order to solve the problem of above is present, people are seeking a kind of preferable technical solution always.
The content of the invention
The purpose of the present invention is that in view of the shortcomings of the prior art, so as to provide, a kind of stability is good, temperature coefficient is small, high temperature
The strong ionic liquid electrochemical gas sensor of anti-leakage ability under super-humid conditions.
To achieve these goals, the technical solution adopted in the present invention is：A kind of ionic liquid electrochemical gas sensing
Device, the sensor includes sensor dust cover, upper lid, electrode, metal lead wire, the drain cotton for being adsorbed with ionic liquid and bottom
Seat；Open up air admission hole on the dust cap, the upper lid opens up venthole, the dust cap lid be located on the upper lid and with institute
Cap-shaped is stated into air chamber, the air admission hole connects the air chamber with the venthole；The base is the accommodating cavity of upper opening,
The drain cotton, the metal lead wire, the electrode and the upper lid are sequentially arranged in the accommodating cavity from bottom to top；It is described
Conductive strips are provided with base, the metal lead wire connects the electrode and the conductive strips.
Based on above-mentioned, the sensor electrode is made by supporting noble metal catalyst on Substrates surface, including work
Electrode W, to electrode C and reference electrode R.
It is described that electrode C and the reference electrode R are disposed in parallel on the Substrates based on above-mentioned, the work
The electrode W correspondences venthole is set, and the cross-sectional area of the working electrode W is more than the cross-sectional area of the venthole.
Based on above-mentioned, the bottom at the base two ends is provided with pad, and the conductive strips are since the pad along along base
Wall crosses edge on base and extends to base bottom.
Based on above-mentioned, the metal lead wire is nichrome wire, iron-nickel alloy wire or platinum filament.
Based on above-mentioned, the ionic liquid include 1- butyl -3- methylimidazole villaumites, 1- butyl -3- methylimidazoles bromide,
1- ethyl-3-methylimidazoles bromide, methyltriethylammonitetrafluoroborate tetrafluoroborate or 1- ethyl -1- crassitude chlorine.
Based on above-mentioned, the upper lid and the base are snapped connection, and are sealed with epoxy resin.
A kind of ionic liquid electrochemistry formaldehyde sensor based on the ionic liquid electrochemical gas sensor, using expensive
Pt metal adds dispersant and electrode slurry is made, the electrode of sensor is printed as on a support material as catalyst, respectively will
Base, the drain cotton for being adsorbed with 1- butyl -3- methylimidazole bromides, electrode, upper lid, dust cap are assembled into formaldehyde sensor.
A kind of ionic liquid electrochemical ammonia sensor based on the ionic liquid electrochemical gas sensor, using expensive
Metal Ru adds dispersant and electrode slurry is made, the electrode of sensor is printed as in carrier material PTFE film as catalyst,
Base, the drain cotton for being adsorbed with methyltriethylammonitetrafluoroborate tetrafluoroborate, electrode, upper lid, dust cap are assembled into ammonia sensing respectively
Device.
The present invention compared with the prior art there is the substantive distinguishing features of protrusion and marked improvement, specifically, the present invention to pass through
Structure design, making can be using saturated vapor pressure very low ionic liquid as electrolyte, and the ionic liquid is difficult in atmosphere
Volatilization, makes the sensor relatively conventional inorganic acid of electrolyte or salt electrolyte stable, sensor stabilization in use
Property is also accordingly improved.Have that stability is good, temperature coefficient is small compared to traditional electrochemical gas sensor, it is hot and humid under the conditions of
The advantages of anti-leakage ability is strong.
Brief description of the drawings
Fig. 1 is the explosive view of electrochemical ion liquid sensor of the present invention.
Fig. 2 is half assembling structure schematic diagram of electrochemical ion liquid sensor of the present invention.
Fig. 3 is the electrode structure schematic diagram of electrochemical ion liquid sensor of the present invention.
Embodiment
Below by embodiment, technical scheme is described in further detail.
As depicted in figs. 1 and 2, a kind of ionic liquid electrochemical gas sensor, the sensor includes pickup dust-proofing
Lid 1, upper lid 2, electrode 3, metal lead wire 4, the drain cotton 5 for being adsorbed with ionic liquid and base 6；The lid of dust cap 1 is located at institute
State on lid 2, air admission hole is set on the dust cap 1, the upper lid 2 opens up venthole, and the lid of dust cap 1 is located on described
Air chamber is formed on lid 2 and with the upper lid 2, the air admission hole connects the air chamber with the venthole；The base 6 is top
The accommodating cavity of opening, the drain cotton 5, the metal lead wire 4, the electrode 3 and the upper lid 2 are sequentially arranged from bottom to top
In the air chamber；Conductive strips b is provided with by printing or spraying method on the base 6, the bottom at the two ends of base 6 is set
There are pad a, the conductive strips b to cross edge on base 6 along the inwall of base 6 since the pad a and extend to the bottom of base 6.Institute
State metal lead wire 4 and connect the electrode 3 and the conductive strips b, so as to realize the conducting of sensor signal and external circuit.
During specific assembling, the upper lid 2 and the base 6 are snapped connection, and are sealed with epoxy resin.
In specific selection, according to the difference of test gaseous species, from the electrode and specific kind for supporting different catalysts
The ionic liquid of class.Inventive sensor can be used for the toxic and harmful gas such as detection carbon monoxide, hydrogen sulfide, ammonia, formaldehyde
Composition and content.
The metal lead wire uses nichrome wire, iron-nickel alloy wire or platinum filament.
The ionic liquid includes 1- butyl -3- methylimidazole villaumites, 1- butyl -3- methylimidazoles bromide, 1- ethyls -3-
Methylimidazole bromide, methyltriethylammonitetrafluoroborate tetrafluoroborate or 1- ethyl -1- crassitude chlorine.
As shown in figure 3, the sensor electrode includes working electrode W, to electrode C and reference electrode R, during making, with expensive
Metal adds a certain proportion of dispersant and is made after electrode slurry as catalyst, then is printed to biography on Substrates surface
Sensor electrode.It is described that electrode C and the reference electrode R are disposed in parallel on the Substrates, the working electrode W correspondences
The venthole is set, and the cross-sectional area of the working electrode W is more than the cross-sectional area of the venthole.
Using precious metals pt as catalyst, add dispersant and electrode slurry is made, sensing is printed as on a support material
The electrode of device, respectively assembles base, the drain cotton for being adsorbed with 1- butyl -3- methylimidazole bromides, electrode, upper lid, dust cap
Into formaldehyde sensor.After tested, the sensitivity annual oscillations rate of sensor is 4.9%, and 50 DEG C of temperatures coefficient are 1.01.
Using noble metal Ru as catalyst, add dispersant and electrode slurry is made, printed in carrier material PTFE film
Into the electrode of sensor, respectively by base, the drain cotton for being adsorbed with methyltriethylammonitetrafluoroborate tetrafluoroborate, electrode, upper lid, dust cap
It is assembled into ammonia gas sensor.After tested, the sensitivity year attenuation rate of sensor is 9.5%, and 50 DEG C of temperatures coefficient are 1.03.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among claimed technical scheme scope of the invention.
Claims (9)
1. a kind of ionic liquid electrochemical gas sensor, it is characterised in that：The sensor include sensor dust cover, on
Lid, electrode, metal lead wire, the drain cotton for being adsorbed with ionic liquid and base；Air admission hole, the upper lid are opened up on the dust cap
Open up venthole, the dust cap lid is located on the upper lid and with the upper cap-shaped into air chamber, the air admission hole and it is described go out
Stomata connects the air chamber；The base is the accommodating cavity of upper opening, the drain cotton, the metal lead wire, the electrode
It is sequentially arranged from bottom to top in the accommodating cavity with the upper lid；Conductive strips are provided with the base, the metal draws
Line connects the electrode and the conductive strips.
2. ionic liquid electrochemical gas sensor according to claim 1, it is characterised in that：The sensor electrode by
On Substrates surface noble metal catalyst is supported to be made, including working electrode W, to electrode C and reference electrode R.
3. ionic liquid electrochemical gas sensor according to claim 2, it is characterised in that：It is described to electrode C and institute
State reference electrode R to be disposed in parallel on the Substrates, the working electrode W correspondences venthole is set, the work
Electrode W cross-sectional area is more than the cross-sectional area of the venthole.
4. ionic liquid electrochemical gas sensor according to claim 1, it is characterised in that：The bottom at the base two ends
Portion is provided with pad, and the conductive strips cross edge on base along base inner wall since the pad and extend to base bottom.
5. ionic liquid electrochemical gas sensor according to claim 1, it is characterised in that：The metal lead wire is nickel
Chromium alloy wire, iron-nickel alloy wire or platinum filament.
6. ionic liquid electrochemical gas sensor according to claim 1, it is characterised in that：The ionic liquid includes
1- butyl -3- methylimidazole villaumites, 1- butyl -3- methylimidazoles bromide, 1- ethyl-3-methylimidazoles bromide, methyl triethyl group
Ammonium tetrafluoroborate or 1- ethyl -1- crassitude chlorine.
7. ionic liquid electrochemical gas sensor according to claim 1, it is characterised in that：The upper lid and the bottom
Seat is snapped connection, and is sealed with epoxy resin.
8. a kind of ionic liquid electrochemistry first based on any one of the claim 1-7 ionic liquid electrochemical gas sensors
Aldehyde sensor, it is characterised in that：Using precious metals pt as catalyst, add dispersant and electrode slurry is made, in carrier material
On be printed as the electrode of sensor, respectively by base, be adsorbed with the drain cotton of 1- butyl -3- methylimidazole bromides, electrode, on
Lid, dust cap are assembled into formaldehyde sensor.
9. a kind of ionic liquid electrochemistry ammonia based on any one of the claim 1-7 ionic liquid electrochemical gas sensors
Gas sensor, it is characterised in that：Using noble metal Ru as catalyst, add dispersant and electrode slurry is made, in carrier material
The electrode of sensor is printed as in PTFE film, respectively by base, the drain cotton for being adsorbed with methyltriethylammonitetrafluoroborate tetrafluoroborate, electricity
Pole, upper lid, dust cap are assembled into ammonia gas sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509887.0A CN107219287B (en) | 2017-06-28 | 2017-06-28 | Ionic liquid electrochemical gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509887.0A CN107219287B (en) | 2017-06-28 | 2017-06-28 | Ionic liquid electrochemical gas sensor |
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| Publication Number | Publication Date |
|---|---|
| CN107219287A true CN107219287A (en) | 2017-09-29 |
| CN107219287B CN107219287B (en) | 2023-11-17 |
Family
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764179A (en) * | 2017-11-20 | 2018-03-06 | 汉威科技集团股份有限公司 | Low-power consumption valve corner on-Line Monitor Device and its on-line monitoring method |
| CN110726761A (en) * | 2019-11-14 | 2020-01-24 | 郑州炜盛电子科技有限公司 | Electrochemical gas sensor |
| CN111413387A (en) * | 2020-04-29 | 2020-07-14 | 广州钰芯传感科技有限公司 | Electrochemical gas sensor and electrode package thereof |
| CN113030221A (en) * | 2021-04-14 | 2021-06-25 | 武汉理工大学 | Hydrogen sensor and application thereof |
| CN115165985A (en) * | 2022-07-19 | 2022-10-11 | 华中科技大学 | Electrochemical hydrogen sulfide sensor based on ionic liquid and preparation method thereof |
| WO2024099338A1 (en) * | 2022-11-09 | 2024-05-16 | 郑州炜盛电子科技有限公司 | Flexible electrolyte, preparation method therefor and application thereof |
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| 李广伟;鲁俊民;秦东振;詹自力;郭雪原;: "离子液体在电流型电化学气体传感器中的应用", no. 10, pages 2409 - 2415 * |
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| CN107764179A (en) * | 2017-11-20 | 2018-03-06 | 汉威科技集团股份有限公司 | Low-power consumption valve corner on-Line Monitor Device and its on-line monitoring method |
| CN107764179B (en) * | 2017-11-20 | 2024-02-13 | 汉威科技集团股份有限公司 | Low-power consumption valve rotation angle online monitoring device and online monitoring method thereof |
| CN110726761A (en) * | 2019-11-14 | 2020-01-24 | 郑州炜盛电子科技有限公司 | Electrochemical gas sensor |
| CN111413387A (en) * | 2020-04-29 | 2020-07-14 | 广州钰芯传感科技有限公司 | Electrochemical gas sensor and electrode package thereof |
| CN113030221A (en) * | 2021-04-14 | 2021-06-25 | 武汉理工大学 | Hydrogen sensor and application thereof |
| CN115165985A (en) * | 2022-07-19 | 2022-10-11 | 华中科技大学 | Electrochemical hydrogen sulfide sensor based on ionic liquid and preparation method thereof |
| WO2024099338A1 (en) * | 2022-11-09 | 2024-05-16 | 郑州炜盛电子科技有限公司 | Flexible electrolyte, preparation method therefor and application thereof |
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