CN109239165A - A kind of electrochemical sensor based on Solid-state Ion-exchange - Google Patents
A kind of electrochemical sensor based on Solid-state Ion-exchange Download PDFInfo
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- CN109239165A CN109239165A CN201811275450.6A CN201811275450A CN109239165A CN 109239165 A CN109239165 A CN 109239165A CN 201811275450 A CN201811275450 A CN 201811275450A CN 109239165 A CN109239165 A CN 109239165A
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- 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
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
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Abstract
The invention discloses a kind of electrochemical sensors based on Solid-state Ion-exchange, it include: waterproof ventilated membrane (1), sensor cover (2), membrane electrode (4), plastic stent (5), conducting wire (6), sensor housing (7), pin (8), wherein waterproof ventilated membrane (1) is arranged in the outer surface of sensor cover (2)；Sensor cover (2), membrane electrode (4), plastic stent (5) are sequentially loaded into sensor housing (7)；The membrane electrode (4) includes Solid-state Ion-exchange film, detecting electrode, to electrode, reference electrode, wherein detecting electrode is located on a face of Solid-state Ion-exchange film, and electrode, reference electrode are located on another face and drawn by conducting wire (6), conducting wire (6) is connect with the pin (8) that the bottom of sensor housing (7) is arranged.Present invention employs Solid-state Ion-exchange films to replace traditional liquid electrolyte, realizes that electroless liquid exists, compact-sized, the target of miniaturization.
Description
Technical field
The present invention relates to a kind of electrochemical sensors based on Solid-state Ion-exchange, belong to the technical field of sensor.
Background technique
Conventional electrochemical sensor belongs to liquid electrolyte type sensor.Although using the electrochemical sensing of liquid electrolyte
Device can not only work at room temperature, but also sensor response output signal is big, high sensitivity.But liquid electrolyte there is also
Many disadvantages: such as solution evaporates, and leakage, corrosion etc., it is unstable that this is likely to cause sensor output signal, to make to measure
As a result deviation is generated.
Summary of the invention
Technical problem to be solved by the present invention lies in liquid electrolyte is overcome the shortcomings of, provide a kind of based on solid ion
The electrochemical sensor of exchange replaces traditional liquid electrolyte using Solid-state Ion-exchange film, prevents solution from evaporating, let out
Leakage, corrosion.
The present invention specifically uses following technical scheme to solve above-mentioned technical problem:
A kind of electrochemical sensor based on Solid-state Ion-exchange, comprising: waterproof ventilated membrane, sensor cover, membrane electrode, plastics
Bracket, conducting wire, sensor housing, pin, wherein waterproof ventilated membrane is arranged in the outer surface of sensor cover；By sensor cover,
Membrane electrode, plastic stent are sequentially loaded into sensor shell body；The membrane electrode includes Solid-state Ion-exchange film, detecting electrode, right
Electrode, reference electrode, wherein detecting electrode is located on a face of Solid-state Ion-exchange film, and is located to electrode, reference electrode
On another face of Solid-state Ion-exchange film, and detecting electrode, electrode, reference electrode are drawn by conducting wire, and by conducting wire
The pin being arranged with the bottom of sensor housing is connect.
Further, as a preferred technical solution of the present invention: further including O-ring, the O-ring is set to sensing
Between device capping and membrane electrode.
Further, as a preferred technical solution of the present invention: passing through ultrasonic bonding in the sensor shell body
Encapsulation.
Further, as a preferred technical solution of the present invention: the Solid-state Ion-exchange film uses Nafion membrane.
Further, as a preferred technical solution of the present invention: the detecting electrode, equal to electrode, reference electrode
Noble metal or its mixture are deposited on Solid-state Ion-exchange film by sputtering method and obtained.
Further, as a preferred technical solution of the present invention: the noble metal is Pt or Pd, Au, Ru.
Further, as a preferred technical solution of the present invention: the electrochemical sensor for detect CO and NOx,
SO2, NH3, O3, VOC gas.
The present invention by adopting the above technical scheme, can have the following technical effects:
The electrochemical sensor based on Solid-state Ion-exchange that the present invention designs, be it is a kind of can be used for detecting it is flammable, it is inflammable
Or the electrochemical sensor of toxic and harmful gas.Electrochemical sensor of the invention includes at least one Solid-state Ion-exchange
Film, a detecting electrode, one to electrode, a reference electrode.Electrode of the invention includes at least noble metal such as Pt, Pd,
Au, Ru etc. or mixture.Due to the use of solid liposome nanoparticle film, can effectively improve electrochemical sensor uses the longevity
Life shortens the response time, also has certain effect to reduction bottom electric current and noise aspect.When electrochemical sensor of the invention is used
In detection CO, NOx, SO2, NH3, O3, when VOC, there is good effect.It replaces passing present invention employs Solid-state Ion-exchange film
The liquid electrolyte of system realizes that electroless liquid exists, compact-sized, the target of miniaturization.
Detailed description of the invention
Fig. 1 is that the present invention is based on the structural schematic diagrams of the electrochemical sensor of Solid-state Ion-exchange.
Fig. 2 is the diagrammatic cross-section of electrochemical sensor of the present invention.
Wherein, Symbol explanation: 1- waterproof ventilated membrane, 2- sensor cover, 3-O type circle, 4- membrane electrode, 5- plastic stent,
6- conducting wire, 7- sensor housing, 8- pin.
Specific embodiment
Embodiments of the present invention are described with reference to the accompanying drawings of the specification.
As depicted in figs. 1 and 2, the present invention devises a kind of electrochemical sensor based on Solid-state Ion-exchange, comprising: anti-
Water ventilated membrane 1, sensor cover 2, O-ring 3, membrane electrode 4, plastic stent 5, conducting wire 6, sensor housing 7, pin 8.
Specifically, waterproof ventilated membrane 1 is arranged in the outer surface of the sensor cover 2；By sensor cover 2, membrane electrode 4,
Plastic stent 5 is sequentially loaded into sensor housing 7, and sensor housing 7 can be encapsulated by ultrasonic bonding, is realized
Fixed installation effect.Preferably, O-ring 3 can be set between sensor cover 2 and membrane electrode 4, plays anti-skidding sealing and makees
With.
The membrane electrode 4 includes Solid-state Ion-exchange film, detecting electrode, to electrode, reference electrode, wherein detecting electrode position
In on a face of Solid-state Ion-exchange film, and electrode, reference electrode are located on another face of Solid-state Ion-exchange film, and
Detecting electrode passes through conducting wire 6 to electrode, reference electrode and draws, and the pipe that the bottom of conducting wire 6 and sensor housing 7 is arranged
Foot 8 connects.
Detecting electrode in the membrane electrode 4 of this sensor, electrode, reference electrode are passed through sputtering method by noble metal or its
Mixture is deposited on Solid-state Ion-exchange film and is obtained, i.e., is instead of traditional liquid electrolyte, benefit with Solid-state Ion-exchange film
Use sputtering method depositing noble metal as electrode, working electrode, to electrode, reference electrode and Solid-state Ion-exchange film form membrane electrode
4.There is the extraction of conducting wire 6 on three electrodes respectively.Preferably, the Solid-state Ion-exchange film uses Nafion membrane.
The preparation of the membrane electrode 4 can be, but not limited to process: Solid-state Ion-exchange film cut according to certain diameter,
Then 2h is boiled under certain temperature in 0.5mol/L (5%) H2O2 solution, except the organic impurities in striping, is then placed in dilute sulphur
2h is boiled in acid solution, except the inorganic impurity in striping, 2h is finally boiled in distilled water, is put into deionized water stand-by.It will
The Solid-state Ion-exchange film handled well prepares detecting electrode by sputtering method respectively, to electrode and reference electrode.
Such as the detecting electrode is prepared as follows: by sputtering method by noble metal, such as Pt, Pd, Au, Ru
Deng or its mixture deposit on Solid-state Ion-exchange film, obtain detecting electrode.It is described electric to electrode preparation method and detection
Pole method is similar；It is described similar with detecting electrode method to electrode preparation method.
In the present invention, due to the use of solid liposome nanoparticle film, the service life of electrochemical sensor can effectively improve,
Shorten the response time, also has certain effect to reduction bottom electric current and noise aspect.When electrochemical sensor of the invention is used for
CO and NOx, SO2, NH3 are detected, when the gases such as O3, VOC, there is good effect.
Therefore, present invention employs Solid-state Ion-exchange films to replace traditional liquid electrolyte, realizes that electroless liquid exists,
It is compact-sized, the target of miniaturization.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
It makes a variety of changes.
Claims (7)
1. a kind of electrochemical sensor based on Solid-state Ion-exchange characterized by comprising waterproof ventilated membrane (1), sensor
(2), membrane electrode (4), plastic stent (5), conducting wire (6), sensor housing (7), pin (8) are covered, wherein sensor cover (2)
Outer surface be arranged waterproof ventilated membrane (1)；Sensor cover (2), membrane electrode (4), plastic stent (5) are sequentially loaded into sensor
In shell (7)；The membrane electrode (4) includes Solid-state Ion-exchange film, detecting electrode, to electrode, reference electrode, wherein detection electricity
Pole is located on a face of Solid-state Ion-exchange film, and is located at another face of Solid-state Ion-exchange film to electrode, reference electrode
On, and detecting electrode, pass through conducting wire (6) extraction to electrode, reference electrode, and by the bottom of conducting wire (6) and sensor housing (7)
Pin (8) connection of portion's setting.
2. according to claim 1 based on the electrochemical sensor of Solid-state Ion-exchange, it is characterised in that: further include O-ring
(3), the O-ring (3) is set between sensor cover (2) and membrane electrode (4).
3. according to claim 1 based on the electrochemical sensor of Solid-state Ion-exchange, it is characterised in that: the sensor shell
It is encapsulated in body (7) by ultrasonic bonding.
4. according to claim 1 based on the electrochemical sensor of Solid-state Ion-exchange, it is characterised in that: the solid ion
Exchange membrane uses Nafion membrane.
5. according to claim 1 based on the electrochemical sensor of Solid-state Ion-exchange, it is characterised in that: the detection electricity
Pole passes through sputtering method to electrode, reference electrode and deposits to noble metal or its mixture on Solid-state Ion-exchange film and obtains.
6. according to claim 5 based on the electrochemical sensor of Solid-state Ion-exchange, it is characterised in that: the noble metal is
Pt or Pd, Au, Ru.
7. according to claim 1 based on the electrochemical sensor of Solid-state Ion-exchange, it is characterised in that: the electrochemical sensing
Device is for detecting CO and NOx, SO2, NH3, O3, VOC gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275450.6A CN109239165A (en) | 2018-10-30 | 2018-10-30 | A kind of electrochemical sensor based on Solid-state Ion-exchange |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811275450.6A CN109239165A (en) | 2018-10-30 | 2018-10-30 | A kind of electrochemical sensor based on Solid-state Ion-exchange |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114002298A (en) * | 2021-11-26 | 2022-02-01 | 南京伊桥科技有限公司 | Quick-response catalytic electrode of acid electrolyte oxygen sensor and preparation method |
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|---|---|---|---|---|
| JPH11190713A (en) * | 1997-12-26 | 1999-07-13 | Shimadzu Corp | Constant potential electrolytic gas sensor |
| CN101825604A (en) * | 2010-02-01 | 2010-09-08 | 北京亚都空气污染治理技术有限公司 | Formaldehyde gas sensor |
| US20150369774A1 (en) * | 2011-09-08 | 2015-12-24 | Brk Brands, Inc. | Carbon Monoxide Sensor System and Method |
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| CN106537131A (en) * | 2014-06-27 | 2017-03-22 | 斯佩克传感器有限责任公司 | Printed gas sensor |
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| WO2018059719A1 (en) * | 2016-09-30 | 2018-04-05 | Honeywell International Inc. | Method and apparatus for electrolyte concentration measurement in an electrochemical sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114002298A (en) * | 2021-11-26 | 2022-02-01 | 南京伊桥科技有限公司 | Quick-response catalytic electrode of acid electrolyte oxygen sensor and preparation method |
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Application publication date: 20190118 |