CN114609207A - Electrochemical gas sensor for rapidly detecting chlorine and preparation method thereof - Google Patents
Electrochemical gas sensor for rapidly detecting chlorine and preparation method thereof Download PDFInfo
- Publication number
- CN114609207A CN114609207A CN202210287330.8A CN202210287330A CN114609207A CN 114609207 A CN114609207 A CN 114609207A CN 202210287330 A CN202210287330 A CN 202210287330A CN 114609207 A CN114609207 A CN 114609207A
- Authority
- CN
- China
- Prior art keywords
- electrode layer
- chlorine
- reference electrode
- gas sensor
- working electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
-
- 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
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/301—Reference electrodes
-
- 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
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/307—Disposable laminated or multilayered electrodes
-
- 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
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/308—Electrodes, e.g. test electrodes; Half-cells at least partially made of carbon
Abstract
The invention provides an electrochemical gas sensor for rapidly detecting chlorine and a preparation method thereof, and the electrochemical gas sensor comprises a shell with a cavity inside, wherein strong acid electrolyte is filled in the shell, the shell comprises a working electrode layer, a reference electrode layer, a multilayer liquid retention diaphragm and a counter electrode layer, the working electrode layer, the reference electrode layer and the counter electrode layer are arranged from top to bottom, the working electrode layer is simultaneously separated from the reference electrode layer and the counter electrode layer through the multilayer liquid retention diaphragm, the working electrode layer, the reference electrode layer and the counter electrode layer are in direct contact with the strong acid electrolyte, and the working electrode layer and the reference electrode layer are carbon element electrodes containing added active ingredients. The advantage of shortening the monitoring response time of low-concentration chlorine gas can be mainly achieved.
Description
Technical Field
The invention relates to the field of electrochemical sensors, in particular to an electrochemical gas sensor for rapidly detecting chlorine and a preparation method thereof.
Background
Chlorine is a highly toxic gas with a strong pungent odor, which can invade the human body through the respiratory tract and cause permanent damage and even death after short-term contact. But can be used for producing plastics (such as PVP), synthetic fibers, dyes, pesticides, disinfectants, bleach solvents and various chlorides because of the reaction with various organic and inorganic substances, and is an important raw material in the industrial production field. It is therefore necessary to detect the chlorine concentration strictly in these industrial sites.
Because of the high toxicity of chlorine, the maximum allowable concentration of chlorine in air is 1mg/m specified in China3About 0.3 ppm. The electrochemical chlorine sensor in the current market has long monitoring response time to low-concentration chlorine, generally needs 60 seconds or even longer time, and if chlorine leakage occurs, great risk exists in the longer detection time to the personal safety.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an electrochemical gas sensor for rapidly detecting chlorine and a preparation method thereof, which have the advantage of shortening the monitoring response time of low-concentration chlorine.
In order to achieve the purpose, the electrochemical gas sensor for rapidly detecting chlorine provided by the invention comprises a shell, a chlorine inlet and a plurality of pins, wherein the interior of the shell is a cavity, a strong acid electrolyte is filled in the shell, the shell comprises a working electrode layer, a reference electrode layer, a multilayer liquid retention diaphragm and a counter electrode layer, the working electrode layer, the reference electrode layer and the counter electrode layer are arranged from top to bottom, the working electrode layer is separated from the reference electrode layer and the counter electrode layer simultaneously through the multilayer liquid retention diaphragm, the working electrode layer, the reference electrode layer and the counter electrode layer are in direct contact with the strong acid electrolyte, and the working electrode layer and the reference electrode layer are carbon element electrodes containing added active ingredients.
Further, the active components in the working electrode layer and the reference electrode layer are selected from Si, S, P, I in nonmetal simple substance or oxide powder SiO2、SO3、P2O3、P2O5、I2O5At least one of (1).
Further, the content of the active ingredient in the working electrode layer is 10 to 30% by mass, and the content of the active ingredient in the reference electrode layer is 5 to 15% by mass.
Further, the strong acid electrolyte is H with the mass concentration of 10-50%2SO4Aqueous solution or H3PO4An aqueous solution.
Further, the working electrode layer and the reference electrode layer are selected from one of a graphite electrode, a conductive carbon black electrode, a porous carbon nanotube electrode, carbon cloth or a graphene electrode.
A method for manufacturing an electrochemical chlorine gas sensor for an electrochemical gas sensor for rapidly detecting chlorine gas, S1: adding a carbon element electrode material into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the carbon element electrode material is completely dispersed, adding active component powder into the mixed solution, continuously stirring to prepare slurry, then compounding the slurry onto a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a working electrode layer;
s2: adding a carbon element electrode material into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the carbon element electrode material is completely dispersed, then adding active component powder into the mixed solution, continuously stirring to prepare slurry, then compounding the slurry onto a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a reference electrode layer;
s3: adding a noble metal electrode material into a mixed solution of isopropanol and 5% Nafion, magnetically stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a counter electrode layer.
S4: and sequentially filling the prepared working electrode layer, the reference electrode layer and the counter electrode layer into a shell filled with electrolyte from top to bottom to assemble the electrochemical chlorine sensor.
Has the advantages that: 1. in the electrochemical chlorine sensor, the reference electrode layer and the counter electrode layer are separated without using a liquid retention diaphragm, so that the distance of ion transmission between the reference electrode layer and the counter electrode layer is reduced, and the aim of shortening the response time is fulfilled.
2. The working electrode layer and the reference electrode layer are prepared by adding active ingredients, the response rate to chlorine is higher, and the purpose of shortening the response time is achieved.
Drawings
The present invention will be further described and illustrated with reference to the following drawings.
Fig. 1 is a schematic structural view of an electrochemical sensor according to embodiment 1 or embodiment 2.
Fig. 2 is a graph comparing the response time of the electrochemical sensor of example 1 according to the preferred embodiment of the present invention with that of the conventional electrochemical sensor.
Reference numerals: 1. a working electrode layer; 2. a reference electrode layer; 3. a counter electrode layer; 4. an electrolyte; 5. multilayer liquid retention diaphragm.
Detailed Description
The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the working electrode layer 1 and the reference electrode layer 2 of the electrochemical chlorine sensor are selected from one of graphite electrodes, conductive carbon black electrodes, porous carbon nanotube electrodes, carbon cloth, or graphene electrodes.
In particular, in this example, the following steps and amounts were specifically used to prepare an electrochemical chlorine sensor:
s1: 1600mg of conductive carbon black is added into the mixed solution of isopropanol and 5 percent Nafion, the mixture is magnetically stirred for 2 hours until the mixture is completely dispersed, and then 400mg of micron-sized SiO is added2Adding the powder into the mixture, continuously stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a reference electrode layer;
s2: adding 900mg of conductive carbon black into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the mixture is completely dispersed, and then adding 100mg of micron-sized SiO 22Adding the powder into the mixture, continuously stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a reference electrode layer;
s3: adding 2000mgPt black into a mixed solution of isopropanol and 5% Nafion, magnetically stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare the counter electrode layer.
S4: and sequentially filling the prepared working electrode layer, the reference electrode layer and the counter electrode layer into a shell filled with electrolyte from top to bottom to assemble the electrochemical chlorine sensor.
The traditional electrochemical chlorine sensor approach is:
adding 2000mg of Pt black into a mixed solution of isopropanol and 5% Nafion, magnetically stirring to prepare slurry, then compounding the slurry onto a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to respectively prepare a working electrode layer, a reference electrode layer and a counter electrode layer. And sequentially filling the prepared working electrode layer, the reference electrode layer and the counter electrode layer into a shell filled with electrolyte from top to bottom to assemble the electrochemical chlorine sensor.
After comparing the reaction time of the electrochemical sensor of this embodiment with that of the conventional electrochemical sensor, a corresponding time comparison relationship is obtained, as shown in fig. 2, for illustrating the response rate of the electrochemical sensor of example 1.
As shown in fig. 2, it is clear that the response time of the working electrode layer and the reference electrode layer, which are carbon element electrodes containing the added active component, is shorter after the improvement.
The electrochemical sensor applied to the preparation method in the embodiment mainly comprises a shell, a chlorine inlet and a pin, wherein the interior of the shell is a cavity, a strong acid electrolyte 4 is filled in the shell, a working electrode layer 1, a reference electrode layer 2, a multi-layer liquid retention membrane 5 and a counter electrode layer 3 are contained in the shell, and the working electrode layer, the reference electrode layer and the counter electrode layer are arranged from top to bottom. The working electrode layer 1 is separated from the reference electrode layer 2 and the counter electrode layer 3 by a plurality of layers of liquid retention membranes 5, the working electrode layer 1, the reference electrode layer 2 and the counter electrode layer 3 are in direct contact with the strong-acid electrolyte 4, and the working electrode layer and the reference electrode layer are carbon element electrodes containing added active components.
The strong acid electrolyte adopts H with the mass concentration of 10-50%2SO4Aqueous solution or H3PO4Aqueous solution, content about 1 ml.
A noble metal electrode containing Pt is used as the counter electrode, for example: a Pt electrode, a Pt/C electrode, a Pt/graphite electrode, a Pt/C/graphite electrode, a Pt/Ru/C electrode, or a Pt/Ru/graphite electrode.
The working electrode layer and the reference electrode layer are selected from one of a graphite electrode, a conductive carbon black electrode, a porous carbon nanotube electrode, carbon cloth or a graphene electrode, and active ingredients are added into the working electrode layer and the reference electrode layer.
The active components comprise Si, S, P and I in nonmetal simple substance, and the latter comprises oxide powder SiO2、SO3、P2O3、P2O5、I2O5At least one of (1).
And the content of the active ingredient in the working electrode layer is 10 to 30% by mass ratio, and the content of the active ingredient in the reference electrode layer is 5 to 15% by mass ratio.
In summary, in the embodiment, the response rate is mainly improved in two ways.
The first method comprises the following steps: in the manufactured electrochemical chlorine sensor, the reference electrode layer and the counter electrode layer are separated without a liquid retention diaphragm, so that the distance of ion transmission between the reference electrode layer and the counter electrode layer is reduced, and the aim of shortening the response time is fulfilled.
And the second method comprises the following steps: active ingredients in the working electrode layer and the reference electrode layer are increased, the response rate of the working electrode layer and the reference electrode layer to chlorine is improved, and the purpose of shortening the response time is achieved.
Example 2
The difference from example 1 is that another method for manufacturing an electrochemical chlorine sensor having a different content,
in this example, an electrochemical chlorine sensor was prepared using the following steps:
s1, adding 900mg of graphite powder into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the graphite powder is completely dispersed, and then adding 600mg of SO3Adding the powder into the mixture, stirring to obtain slurry, and compounding the slurry to porous air-permeable PTFE membrane by screen printing or sprayingDrying to prepare a working electrode layer;
s2, adding 850mg of graphite powder into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the graphite powder is completely dispersed, and then adding 150mg of SO3Adding the powder into the mixture, continuously stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a reference electrode layer;
s3, adding 2000mg of Pt/graphite into a mixed solution of isopropanol and 5% Nafion, magnetically stirring to prepare slurry, then compounding the slurry onto a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare the counter electrode layer.
S4: and sequentially filling the prepared working electrode layer, the reference electrode layer and the counter electrode layer into a shell filled with electrolyte from top to bottom to assemble the electrochemical chlorine sensor.
The above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the invention. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. The scope of the invention is defined by the claims.
Claims (7)
1. The utility model provides an electrochemical gas sensor of short-term test chlorine, includes that inside is casing, chlorine import, a plurality of pin of cavity, its characterized in that, pour into strong acid electrolyte in the casing, contain working electrode layer, reference electrode layer, multilayer liquid retention diaphragm and counter electrode layer in the casing, working electrode layer, reference electrode layer and counter electrode layer are from last to setting up down, working electrode layer keeps liquid the diaphragm through the multilayer and separates with reference electrode layer and counter electrode layer simultaneously, working electrode layer, reference electrode layer and counter electrode layer and strong acid electrolyte direct contact, working electrode layer and reference electrode layer are for containing the carbon element electrode who adds active ingredient.
2. The electrochemical gas sensor for rapidly detecting chlorine as claimed in claim 1, wherein the active components in the working electrode layer and the reference electrode layer are selected from Si, S, P, I in nonmetal simple substance or oxide powder SiO2、SO3、P2O3、P2O5、I2O5At least one of (1).
3. The electrochemical gas sensor for rapid detection of chlorine as claimed in claim 2, wherein the active component content in the working electrode layer is 10 to 30% by mass and the active component content in the reference electrode layer is 5 to 15% by mass.
4. The electrochemical gas sensor for rapid detection of chlorine as claimed in claim 1, wherein the strongly acidic electrolyte is H with a mass concentration of 10% to 50%2SO4Aqueous solution or H3PO4An aqueous solution.
5. The electrochemical gas sensor for rapidly detecting chlorine according to claim 1, wherein the working electrode layer and the reference electrode layer are selected from one of graphite electrodes, conductive carbon black electrodes, porous carbon nanotube electrodes, carbon cloth, or graphene electrodes.
6. The electrochemical gas sensor for rapid detection of chlorine according to claim 1, wherein the counter electrode layer is a Pt electrode, a Pt/C electrode, a Pt/graphite electrode, a Pt/C/graphite electrode, a Pt/Ru/C electrode, or a Pt/Ru/graphite electrode.
7. A method for manufacturing an electrochemical chlorine gas sensor for use in the electrochemical gas sensor for rapid detection of chlorine according to any one of claims 1 to 6,
s1: adding a carbon element electrode material into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the carbon element electrode material is completely dispersed, adding active component powder into the mixed solution, continuously stirring to prepare slurry, then compounding the slurry onto a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a working electrode layer;
s2: adding a carbon element electrode material into a mixed solution of isopropanol and 5% Nafion, magnetically stirring for 2 hours until the carbon element electrode material is completely dispersed, adding active component powder into the mixed solution, continuously stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a reference electrode layer;
s3: adding a noble metal electrode material into a mixed solution of isopropanol and 5% Nafion, magnetically stirring to prepare slurry, then compounding the slurry on a porous and breathable PTFE membrane by using a screen printing or spraying technology, and drying to prepare a counter electrode layer;
s4: and sequentially filling the prepared working electrode layer, the reference electrode layer and the counter electrode layer into a shell filled with electrolyte from top to bottom to assemble the electrochemical chlorine sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210287330.8A CN114609207A (en) | 2022-03-22 | 2022-03-22 | Electrochemical gas sensor for rapidly detecting chlorine and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210287330.8A CN114609207A (en) | 2022-03-22 | 2022-03-22 | Electrochemical gas sensor for rapidly detecting chlorine and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114609207A true CN114609207A (en) | 2022-06-10 |
Family
ID=81864800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210287330.8A Pending CN114609207A (en) | 2022-03-22 | 2022-03-22 | Electrochemical gas sensor for rapidly detecting chlorine and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114609207A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6607642B1 (en) * | 1999-08-17 | 2003-08-19 | DRäGERWERK AKTIENGESELLSCHAFT | Electrochemical gas sensor with diamond-like carbon electrodes |
| KR20170068413A (en) * | 2017-04-26 | 2017-06-19 | 한국생산기술연구원 | Method for detecting chemical substances using impedance analysis |
| CN109187683A (en) * | 2018-08-14 | 2019-01-11 | 南京工业大学 | A kind of fixed electric potential electroanalysis type gas sensor, preparation method and purposes |
| CN109270146A (en) * | 2018-09-29 | 2019-01-25 | 荆州市爱尔瑞科技有限公司 | A kind of electrochemistry chlorine sensor |
| CN110231379A (en) * | 2019-06-12 | 2019-09-13 | 成都万众壹芯生物科技有限公司 | A kind of residual chlorine sensor and application thereof based on electrochemical principle |
| CN210572089U (en) * | 2019-08-13 | 2020-05-19 | 南京艾伊科技有限公司 | Electrochemical ammonia gas sensor based on anti-interference sensitive electrode |
| CN111982989A (en) * | 2020-08-06 | 2020-11-24 | 成都师范学院 | SiO (silicon dioxide)2Preparation method and application of-MWCNTs (multi-wall carbon nanotubes) enzymatic glucose electrochemical sensor |
| CN114002283A (en) * | 2021-11-26 | 2022-02-01 | 南京伊桥科技有限公司 | High-selectivity electrochemical hydrogen sulfide sensor and working electrode preparation method |
-
2022
- 2022-03-22 CN CN202210287330.8A patent/CN114609207A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6607642B1 (en) * | 1999-08-17 | 2003-08-19 | DRäGERWERK AKTIENGESELLSCHAFT | Electrochemical gas sensor with diamond-like carbon electrodes |
| KR20170068413A (en) * | 2017-04-26 | 2017-06-19 | 한국생산기술연구원 | Method for detecting chemical substances using impedance analysis |
| CN109187683A (en) * | 2018-08-14 | 2019-01-11 | 南京工业大学 | A kind of fixed electric potential electroanalysis type gas sensor, preparation method and purposes |
| CN109270146A (en) * | 2018-09-29 | 2019-01-25 | 荆州市爱尔瑞科技有限公司 | A kind of electrochemistry chlorine sensor |
| CN110231379A (en) * | 2019-06-12 | 2019-09-13 | 成都万众壹芯生物科技有限公司 | A kind of residual chlorine sensor and application thereof based on electrochemical principle |
| CN210572089U (en) * | 2019-08-13 | 2020-05-19 | 南京艾伊科技有限公司 | Electrochemical ammonia gas sensor based on anti-interference sensitive electrode |
| CN111982989A (en) * | 2020-08-06 | 2020-11-24 | 成都师范学院 | SiO (silicon dioxide)2Preparation method and application of-MWCNTs (multi-wall carbon nanotubes) enzymatic glucose electrochemical sensor |
| CN114002283A (en) * | 2021-11-26 | 2022-02-01 | 南京伊桥科技有限公司 | High-selectivity electrochemical hydrogen sulfide sensor and working electrode preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ahammad et al. | Cost-effective electrochemical sensor based on carbon nanotube modified-pencil electrode for the simultaneous determination of hydroquinone and catechol | |
| Yang et al. | Selective determination of epinephrine using electrochemical sensor based on ordered mesoporous carbon/nickel oxide nanocomposite | |
| EP1959253A2 (en) | Electrochemical sensor | |
| CN107449816A (en) | All solid state ISE, preparation method and biology sensor | |
| EP2975390B1 (en) | Amperometric electrochemical gas sensing apparatus and method for measuring oxidising gases | |
| CN112394095A (en) | Electrochemical sensor for selectively detecting nitrite ions and preparation method and application thereof | |
| DE60301801T2 (en) | Electrochemical sensor for the detection of carbon monoxide | |
| DE1267296C2 (en) | FUEL ELEMENT | |
| CN111175362A (en) | Electrochemical hydrogen sulfide sensor and preparation method thereof | |
| Lonappan et al. | Electrochemical studies of tamsulosin hydrochloride using multiwalled carbon nanotube-modified glassy carbon sensor | |
| EP1419379B1 (en) | Electrochemical sensor | |
| CN107991366A (en) | The expiration hydrogen sensor of anti-interference fast-response | |
| CN114609207A (en) | Electrochemical gas sensor for rapidly detecting chlorine and preparation method thereof | |
| CN113899793A (en) | Electrochemical sulfur dioxide sensor and preparation method of high-stability counter electrode | |
| Amini et al. | Layered double hydroxide nanoparticles embedded in a biopolymer: a novel platform for electroanalytical determination of diazepam | |
| Yan et al. | Microwave-assisted synthesis of carbon dots–zinc oxide/multi-walled carbon nanotubes and their application in electrochemical sensors for the simultaneous determination of hydroquinone and catechol | |
| KR20200071210A (en) | Reduced graphene oxide and ammonia gas sensor comprising the same | |
| CN216926674U (en) | Electrochemical sulfur dioxide sensor | |
| CN109286024A (en) | A kind of preparation method of high-performance electric chemistry lambda sensor membrane electrode | |
| Zou et al. | The facile synthesis of a Co 3 O 4–NiNP composite as an electrochemical non-enzymatic sensing platform for small chemical molecules | |
| CN109270146B (en) | Electrochemical chlorine sensor | |
| JP6209327B2 (en) | Constant potential electrolytic gas sensor | |
| Jebril et al. | Development of a cost-effective and sustainable nanoplatform based on a green gold sononanoparticles/carbon black nanocomposite for high-performance simultaneous determination of nanoplastics | |
| Pavan et al. | Congo red immobilized on a silica/aniline xerogel: Preparation and application as an amperometric sensor for ascorbic acid | |
| CN110749637A (en) | CO electrochemical gas sensor based on semi-solid electrolyte and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |