CN112964754B - Synthesis method of flexible ethanol sensor - Google Patents
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- CN112964754B CN112964754B CN202110182667.8A CN202110182667A CN112964754B CN 112964754 B CN112964754 B CN 112964754B CN 202110182667 A CN202110182667 A CN 202110182667A CN 112964754 B CN112964754 B CN 112964754B
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000001308 synthesis method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000007650 screen-printing Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 11
- 238000000151 deposition Methods 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 235000019441 ethanol Nutrition 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 229910052961 molybdenite Inorganic materials 0.000 claims description 17
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 15
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 13
- 239000004246 zinc acetate Substances 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 12
- 239000004332 silver Substances 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 230000002194 synthesizing effect Effects 0.000 claims description 9
- 239000011206 ternary composite Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000004687 hexahydrates Chemical class 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000002121 nanofiber Substances 0.000 claims description 3
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 3
- 239000012279 sodium borohydride Substances 0.000 claims description 3
- RWVGQQGBQSJDQV-UHFFFAOYSA-M sodium;3-[[4-[(e)-[4-(4-ethoxyanilino)phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]-2-methylcyclohexa-2,5-dien-1-ylidene]methyl]-n-ethyl-3-methylanilino]methyl]benzenesulfonate Chemical compound [Na+].C1=CC(OCC)=CC=C1NC1=CC=C(C(=C2C(=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C)C=2C(=CC(=CC=2)N(CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C)C=C1 RWVGQQGBQSJDQV-UHFFFAOYSA-M 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 28
- 239000011787 zinc oxide Substances 0.000 abstract description 14
- 239000002073 nanorod Substances 0.000 abstract description 8
- 229910000510 noble metal Inorganic materials 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000011068 loading method Methods 0.000 abstract description 3
- 238000002715 modification method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000011701 zinc Substances 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y15/00—Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Abstract
The invention provides a synthesis method of a flexible ethanol sensor, which comprises the following steps: preparing a sensitive material; preparing a flexible electrode; and depositing a sensitive material on the flexible electrode to prepare the flexible ethanol sensor. The preparation method of the sensitive material is based on a hydrothermal method for preparing a zinc oxide nano rod structure, and the zinc oxide nano rod structure is modified through multiple times of hydrothermal synthesis by a noble metal loading and doping method and a heterojunction method, so that the selectivity and the sensitivity to ethanol are improved. The method has the advantages that the heterostructure is combined with the noble metal load modification method, and the graphene-like material MoS is adopted 2 The specific surface area of the material is increased, the sensitivity of the material to gas is improved, the selectivity of the material to gas is increased by using the supported noble metal PT, and finally, the interdigital electrode is printed on the flexible material through a screen printing method, and the interdigital electrode and the sensitive material are integrated into the flexible ethanol sensor, so that the flexible ethanol sensor has excellent performance and wide application prospect.
Description
Technical Field
The invention relates to the field of flexible gas sensors, in particular to a synthesis method of a flexible ethanol sensor.
Background
Ethanol is a gas with special odor, and when people are in a high-concentration ethanol environment for 8 hours, the ethanol can cause serious injury to eyes and respiratory tracts of people. Therefore, the research on the sensor for detecting the gas such as ethanol has self-evident meaning and value
Common methods of ethanol detection are optical, calorimetric, gas chromatography and acoustic. The methods need special instruments and equipment, and have the problems of high cost, large volume, inconvenient use, incapability of real-time monitoring, difficult wide popularization and application and the like. The device manufactured based on the flexible substrate has the characteristics of flexibility, biocompatibility, attachability, wearability and the like. Along with the development of materials and preparation processes, flexible electronics gradually exert great advantages in the medical and health fields, and play an important role in real-time monitoring and leakage alarming of gas in the industrial field. However, the existing ethanol sensor has the problems of poor sensitivity, high power consumption and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a synthesis method of a flexible ethanol sensor.
The synthesis method of the flexible ethanol sensor provided by the invention comprises the following steps:
step S1: preparation of Pt-ZnO-MoS 2 Ternary complex ethanol sensitive materials.
Step S2: a flexible electrode is prepared.
Step S3: and depositing a sensitive material on the flexible electrode to prepare the flexible ethanol sensor.
Preferably, the step S1 includes the steps of:
step S101: preparing ZnO powder, namely respectively weighing zinc acetate and sodium hydroxide at room temperature, adding the zinc acetate and the sodium hydroxide into deionized water according to a preset molar ratio, magnetically stirring the zinc acetate and the sodium hydroxide to uniformly mix the zinc acetate and the sodium hydroxide to form a solution, transferring the solution into a reaction kettle, putting the reaction kettle into an oven for hydrothermal reaction, cooling the reaction kettle to the room temperature, washing white precipitate in the reaction kettle with deionized water and absolute ethyl alcohol, and drying the washed white precipitate to obtain a white ZnO powder sample;
step S102: preparation of ZnO-MoS 2 The powder is prepared by weighing ZnO powder, sodium molybdate dihydrate and thiourea, adding into deionized water for ultrasonic dispersion, adding citric acid for magnetic stirring to form a second solution, transferring the second solution into a reaction kettle, then placing into a baking oven for hydrothermal reaction, cooling to normal temperature, washing off-white precipitate in the reaction kettle with deionized water and absolute ethyl alcohol, and drying to obtain off-white ZnO-MoS 2 A powder sample;
step S103: preparing a Pt-ZnO-MoS2 ternary composite material, specifically, weighing the ZnO-MoS 2 Dispersing the powder in deionized water by ultrasonic, adding chloroplatinic acid hexahydrate to form a third solution containing PT, magnetically stirring the third solution, adding sodium borohydride, magnetically stirring again, and subsequently usingAnd (5) centrifugally washing with deionized water and absolute ethyl alcohol, and drying to obtain an off-white Pt-ZnO-MoS2 sample.
Preferably, the molar ratio of zinc acetate to sodium hydroxide is 1:6.
preferably, platinum is doped with ZnO matrix in the mass fraction of 2wt% in the preparation of the Pt-ZnO-MoS2 ternary composite material.
Preferably, the step S2 includes the steps of:
step S201: drawing a silver interdigital electrode graph and manufacturing a screen printing plate for screen printing;
step S202: cleaning surface impurities of the flexible substrate by using ionized water and absolute ethyl alcohol;
step S203: and depositing a layer of silver interdigital electrode on the surface of the flexible substrate by adopting a screen printing method through the screen printing plate.
Preferably, the electrode width and the electrode spacing of the silver interdigital electrode pattern are 1mm.
Preferably, the mesh number of the screen is 250 mesh.
Preferably, the flexible substrate is polyimide with a thickness of 0.1 mm.
Preferably, the screen printing method specifically comprises the following steps: the electrode is subjected to screen printing on a substrate by adjusting the distance between the screen printing plate and the screen printing table to be about 1.5cm, the angle between the scraper and the screen printing plate to be 45 degrees, the conductive silver paste is scraped through holes by the scraper lightly, and then the printed substrate is put into a baking oven to be dried at 100 ℃ to obtain the electrode.
Preferably, the step S3 includes the steps of:
step S301: putting the prepared Pt-ZnO-MoS2 nanofiber sample into a beaker, adding a proper amount of absolute ethyl alcohol, performing ultrasonic treatment, and preparing uniform dispersion;
step S302: sucking a dispersion liquid sample through a micro liquid feeder, and dripping the dispersion liquid sample on an interdigital electrode part of the flexible electrode;
step S303: and (3) putting the flexible electrode into an oven for drying to prepare the flexible ethanol sensor.
Compared with the prior art, the invention has the following beneficial effects:
the zinc oxide nano structure of different growth substrates is prepared based on a hydrothermal method, the zinc oxide nano structure is modified by methods of noble metal loading, doping, heterojunction and the like, finally, the interdigital electrode is printed on the flexible material by a screen printing method, and the flexible ethanol sensor is integrated with the sensitive material.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a flow chart of a method for synthesizing a flexible ethanol sensor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a flexible ethanol sensor synthesis process in an embodiment of the invention;
fig. 3 is a schematic diagram of a silver interdigital electrode according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Fig. 1 is a flowchart of a synthesis method of a flexible ethanol sensor in an embodiment of the present invention, and fig. 2 is a schematic diagram of a synthesis process of a flexible ethanol sensor in an embodiment of the present invention, as shown in fig. 1 and fig. 2, where the synthesis method of a flexible ethanol sensor provided by the present invention includes the following steps:
step 1: preparing a Pt-ZnO-MoS2 ternary composite ethanol sensitive material; the method specifically comprises the following steps:
preparation of pure ZnO nano-rod: at room temperature, zinc acetate and sodium hydroxide are respectively weighed and added into 60ml of deionized water according to a certain molar ratio, magnetic stirring is carried out for 30 minutes, the zinc acetate and the sodium hydroxide are uniformly mixed, then the solution is transferred into a 100ml polytetrafluoroethylene reaction kettle, and the solution is put into an oven for 120-DEG hydrothermal reaction for 10 hours. And cooling to normal temperature, washing the white precipitate in the reaction kettle with deionized water and absolute ethyl alcohol for three times, and drying in an oven at 70 ℃ to obtain a white powder sample.
Preparation of ZnO-MoS2 nanorod heterostructure to obtain ZnO-MoS2 nanorod heterostructure, weighing a certain mass of ZnO powder prepared by the method, adding 0.5g of sodium molybdate dihydrate and 0.7g of thiourea into 60ml of deionized water, performing ultrasonic dispersion for 25 minutes, adding 0.47g of citric acid, magnetically stirring for 15 minutes, transferring the solution into a 100ml polytetrafluoroethylene reaction kettle, placing the reaction kettle into an oven for 180-DEG hydrothermal reaction for 17 hours, cooling to normal temperature, washing off-white precipitate in the reaction kettle with deionized water and absolute ethyl alcohol for three times, and drying in the oven for 60 DEG to obtain an off-white powder sample.
Preparation of a Pt-ZnO-MoS2 ternary composite material: in order to obtain the Pt-ZnO-MoS2 ternary composite material, 0.5g of the prepared ZnO-MoS2 powder is weighed and dispersed in 20ml of deionized water for 25 minutes in an ultrasonic mode, and then chloroplatinic acid hexahydrate is added to prepare a mixed solution with a certain PT content and magnetically stirred for 30 minutes. 0.01g of sodium borohydride was added to the solution and magnetically stirred for 30min. And then, centrifugally washing the mixture with deionized water and absolute ethyl alcohol for three times, and drying the mixture at 60 ℃ to obtain an off-white sample.
In the embodiment of the invention, in the preparation of the pure ZnO nano rod, 0.734g and 0.96g (molar ratio 1:6) of zinc acetate and sodium hydroxide are respectively weighed. The mass of ZnO weighed in the preparation of the ZnO-MoS2 nanorod heterostructure is 0.334g (Zn: mo=2:1). In the preparation of the Pt-ZnO-MoS2 ternary composite material, the ZnO matrix is doped with platinum in a mass fraction of 2 wt%.
Step 2: a flexible electrode is prepared. The method specifically comprises the following steps: the silver interdigital electrode pattern was drawn using AI drawing software, and a screen for screen printing was fabricated. The surface impurities of the flexible substrate are cleaned by using ionized water and absolute ethyl alcohol, and a layer of silver interdigital electrode is deposited on the surface of the flexible substrate by using a screen printing method. The electrode width and electrode spacing of the silver interdigital electrode pattern are both 1mm, as shown in fig. 3. The mesh number of the screen is 250 mesh. The flexible substrate is Polyimide (PI) with a thickness of 0.1 mm. The method for depositing a layer of silver interdigital electrode on the surface of the substrate by using the screen printing method comprises the steps of adjusting the distance between a screen printing plate and a screen printing table to be about 1.5cm, enabling a scraper to form an angle of 45 degrees with the screen printing plate, lightly scraping conductive silver paste through holes by using the scraper to carry out screen printing on the electrode, then placing the printed substrate into a baking oven, and drying at 100 ℃ to obtain the silver interdigital electrode.
Step 3: and depositing a sensitive material on the flexible electrode to prepare the flexible ethanol sensor. The method specifically comprises the following steps: putting the prepared Pt-ZnO-MoS2 nanofiber sample into a beaker, adding a proper amount of absolute ethyl alcohol, performing ultrasonic treatment for 25min, preparing uniform dispersion liquid, sucking some samples by using a micro liquid feeder, dripping the samples on the interdigital electrode part on the surface of the substrate, putting the interdigital electrode part into an oven, and drying at 50 ℃ to prepare the flexible ethanol sensor.
According to the embodiment of the invention, the zinc oxide nano rod structure is prepared based on a hydrothermal method, and is modified through multiple times of hydrothermal synthesis by a noble metal loading and doping method and a heterojunction method, so that the selectivity and the sensitivity to ethanol are improved. The method has the advantages that the heterostructure is combined with the noble metal load modification method, and the graphene-like material MoS is adopted 2 The specific surface area of the material is increased, the sensitivity of the material to gas is improved, the selectivity of the material to gas is increased by using the supported noble metal PT, and finally, the interdigital electrode is printed on the flexible material through a screen printing method, and the interdigital electrode and the sensitive material are integrated into the flexible ethanol sensor, so that the flexible ethanol sensor has excellent performance and wide application prospect.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (9)
1. The synthesis method of the flexible ethanol sensor is characterized by comprising the following steps of:
step S1: preparation of Pt-ZnO-MoS 2 Ternary composite ethanol sensitive material;
step S101: preparing ZnO powder, namely respectively weighing zinc acetate and sodium hydroxide at room temperature, adding the zinc acetate and the sodium hydroxide into deionized water according to a preset molar ratio, magnetically stirring the zinc acetate and the sodium hydroxide to uniformly mix the zinc acetate and the sodium hydroxide to form a solution, transferring the solution into a reaction kettle, putting the reaction kettle into an oven for hydrothermal reaction, cooling the reaction kettle to the room temperature, washing white precipitate in the reaction kettle with deionized water and absolute ethyl alcohol, and drying the washed white precipitate to obtain a white ZnO powder sample;
step S102: preparation of ZnO-MoS 2 The powder is prepared by weighing ZnO powder, sodium molybdate dihydrate and thiourea, adding into deionized water for ultrasonic dispersion, adding citric acid for magnetic stirring to form a second solution, transferring the second solution into a reaction kettle, then placing into a baking oven for hydrothermal reaction, cooling to normal temperature, washing off-white precipitate in the reaction kettle with deionized water and absolute ethyl alcohol, and drying to obtain off-white ZnO-MoS 2 A powder sample;
step S103: preparing a Pt-ZnO-MoS2 ternary composite material, specifically, weighing the ZnO-MoS 2 Dispersing the powder in deionized water by ultrasonic, adding chloroplatinic acid hexahydrate to prepare a third solution containing PT, magnetically stirring the third solution, adding sodium borohydride, magnetically stirring again, centrifugally washing with deionized water and absolute ethyl alcohol, and drying to obtain an off-white Pt-ZnO-MoS2 sample;
step S2: preparing a flexible electrode;
step S3: and depositing a sensitive material on the flexible electrode to prepare the flexible ethanol sensor.
2. The method for synthesizing the flexible ethanol sensor according to claim 1, wherein the molar ratio of zinc acetate to sodium hydroxide is 1:6.
3. the method of synthesizing a flexible ethanol sensor according to claim 1, wherein the Pt-ZnO-MoS2 ternary composite material is prepared by doping a ZnO matrix with a mass fraction of 2 wt%.
4. The method of synthesizing a flexible ethanol sensor according to claim 1, wherein the step S2 comprises the steps of:
step S201: drawing a silver interdigital electrode graph and manufacturing a screen printing plate for screen printing;
step S202: cleaning surface impurities of the flexible substrate by using ionized water and absolute ethyl alcohol;
step S203: and depositing a layer of silver interdigital electrode on the surface of the flexible substrate by adopting a screen printing method through the screen printing plate.
5. The method for synthesizing a flexible ethanol sensor as claimed in claim 4, wherein the electrode width and the electrode spacing of the silver interdigital electrode pattern are 1mm.
6. The method for synthesizing a flexible ethanol sensor as claimed in claim 4, wherein the mesh number of the screen is 250 mesh.
7. The method for synthesizing a flexible ethanol sensor according to claim 4, wherein the flexible substrate is polyimide with a thickness of 0.1 mm.
8. The method for synthesizing a flexible ethanol sensor according to claim 4, wherein the method for screen printing comprises the following steps: the electrode is subjected to screen printing on a substrate by adjusting the distance between the screen printing plate and the screen printing table to be about 1.5cm, the angle between the scraper and the screen printing plate to be 45 degrees, the conductive silver paste is scraped through holes by the scraper lightly, and then the printed substrate is put into a baking oven to be dried at 100 ℃ to obtain the electrode.
9. The method for synthesizing a flexible ethanol sensor according to claim 1, wherein the step S3 comprises the steps of:
step S301: putting the prepared Pt-ZnO-MoS2 nanofiber sample into a beaker, adding a proper amount of absolute ethyl alcohol, performing ultrasonic treatment, and preparing uniform dispersion;
step S302: sucking a dispersion liquid sample through a micro liquid feeder, and dripping the dispersion liquid sample on an interdigital electrode part of the flexible electrode;
step S303: and (3) putting the flexible electrode into an oven for drying to prepare the flexible ethanol sensor.
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| CN115784307B (en) * | 2022-09-08 | 2023-12-26 | 哈尔滨理工大学 | Preparation method and application of platinum or graphene-modified two-dimensional petal flaky molybdenum disulfide sensitive material |
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