CN112255278A - Based on Ti3C2Tx/WO3Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof - Google Patents

Based on Ti3C2Tx/WO3Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof Download PDF

Info

Publication number
CN112255278A
CN112255278A CN202010958487.XA CN202010958487A CN112255278A CN 112255278 A CN112255278 A CN 112255278A CN 202010958487 A CN202010958487 A CN 202010958487A CN 112255278 A CN112255278 A CN 112255278A
Authority
CN
China
Prior art keywords
ammonia gas
gas sensor
composite nano
composite
nano material
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.)
Granted
Application number
CN202010958487.XA
Other languages
Chinese (zh)
Other versions
CN112255278B (en
Inventor
何邕
郭学政
杜炳生
丁艳巧
邝德琳
伍志林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing University
Original Assignee
Chongqing University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing University filed Critical Chongqing University
Priority to CN202010958487.XA priority Critical patent/CN112255278B/en
Publication of CN112255278A publication Critical patent/CN112255278A/en
Application granted granted Critical
Publication of CN112255278B publication Critical patent/CN112255278B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles
    • 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
    • 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)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • General Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Electrochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molecular Biology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

The invention discloses a Ti3C2Tx/WO3The sensor sequentially comprises an alumina ceramic substrate, an Ag/Pd interdigital electrode layer and Ti from bottom to top3C2Tx/WO3A composite material thin film layer of Ti3C2Tx/WO3The composite film is made by drop coating onto a preformed interdigital electrode. WO selected in the invention3The nano particles have the advantages of sensitivity to ammonia gas, quick response time, good long-term stability, easy synthesis, rich oxygen active sites and the like; ti3C2TxThe material is a novel two-dimensional materialIt has a large specific surface area, a high carrier concentration and a surface rich in ammonia-adsorbing functional groups, so that Ti3C2TxThe material has excellent ammonia adsorption capacity; the combination of the two can greatly improve the response sensitivity of the sensor to ammonia gas.

Description

Based on Ti3C2Tx/WO3Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof
Technical Field
The invention relates to the technical field of gas sensors and nano materials, in particular to Ti3C2Tx/WO3A room temperature ammonia gas sensor of composite nano material, a preparation method and application.
Background
With the rapid development of industry and agriculture in recent years, ammonia gas is used in large quantities for chemical raw materials and fertilizer production. However, because of its strong irritation, human beings can suffer from skin allergy, respiratory tract damage and the like after being contacted for a long time. Therefore, the design and development of the ammonia gas sensor which has the advantages of room temperature operation, large response value, high response speed, low detection concentration limit and the like has very important value for industrial and agricultural production.
Metal oxide semiconductors are commonly used materials in the gas sensing field, and are widely used for gas detection due to their ease of preparation and low cost. Among them, tungsten oxide is a common material having excellent sensitivity to ammonia, and has a large response value to ammonia and a high response speed. However, since the metal oxide is not sensitive to gas at room temperature, a heat treatment is required to work. Therefore, the power consumption of the sensor is increased, and the miniaturization and intelligent development of the current sensor is not facilitated. And the metal oxide has strong cross sensitivity to gas, has response to various gases, and is difficult to accurately identify the type and concentration of target gas. These disadvantages greatly limit the application of metal oxides in the gas-sensitive field.
The novel two-dimensional material has the characteristics of large specific surface area, high carrier concentration and the like, so that the room temperature detection of gas can be realized. Through the calculation of a first principle, the two-dimensional materials have larger difference of binding energy of different gases, and each two-dimensional material generally has a characteristic gas corresponding to the two-dimensional material. The characteristics can well make up the defects of the metal oxide semiconductor in the gas sensitive field, and the metal oxide semiconductor and the two-dimensional material are compounded, so that the action temperature of the metal oxide semiconductor on gas can be reduced, and meanwhile, the composite material has excellent gas selection characteristics.
Disclosure of Invention
The invention aims to: providing a Ti3C2Tx/WO3The room-temperature ammonia gas sensor made of the composite nano material, and the preparation method and the application thereof solve the problems of high working temperature, poor ammonia gas sensitivity, low selectivity and the like of the conventional ammonia gas sensor at present.
The technical scheme adopted by the invention is as follows:
based on Ti3C2Tx/WO3Room temperature ammonia sensor of composite nanomaterial, Ti3C2Tx/WO3The room-temperature ammonia gas sensor made of the composite nano material sequentially comprises an alumina ceramic substrate layer, an Ag/Pd interdigital electrode layer and Ti from bottom to top3C2Tx/WO3A composite material thin film layer of Ti3C2Tx/WO3The composite film is made by drop coating onto a preformed interdigital electrode.
Further, the Ti3C2Tx/WO3The thickness of the composite material film layer is 1-5 μm.
Further, said one Ti3C2Tx/WO3The thickness of the Ag/Pd interdigital electrode layer is 100-200nm, the number of pairs of fingers of the Ag/Pd interdigital electrode layer is 5, and the distance between the fingers is 200 mu m.
Ti3C2Tx/WO3The preparation method of the room-temperature ammonia gas sensor made of the composite nano material comprises the following steps:
the method comprises the following steps: preparation of Ti by direct ultrasonic compounding3C2Tx/WO3A composite nanomaterial;
step two: preparation based on Ti3C2Tx/WO3The room temperature ammonia gas sensor of the composite nano material comprises the following specific steps:
A. taking 10mg of prepared Ti3C2Tx/WO3The nano composite material is prepared by dispersing the material in 50 mu L of absolute ethyl alcohol, and performing ultrasonic treatment for 5min (power 150W) to obtain a uniform dispersion liquid.
B. Taking 3 mu L of the dispersion liquid obtained in the step A by using a liquid transfer device, and uniformly coating the dispersion liquid on a prefabricated interdigital electrode of an alumina ceramic substrate layer and an Ag/Pd interdigital electrode layer to obtain Ti3C2Tx/WO3A room temperature ammonia gas sensor of composite nano material.
Further, the first step specifically includes the following steps:
firstly, weighing 2g of Ti3AlC240ml of hydrofluoric acid (40% by mass) was measured and poured into a polytetrafluoroethylene beaker, and the obtained Ti was poured into the beaker3AlC2Slowly adding into the beaker, stirring at room temperature (25 deg.C) at 200rpm for 24 hr, repeatedly centrifuging and washing the solution with deoxygenated water until pH is 6, and vacuum drying the precipitate to obtain Ti3C2TxAnd (5) standby.
② taking 50mg Ti in the step I3C2TxDispersing the Ti powder into 30ml of deoxygenated water, and carrying out ultrasonic treatment for 30min to obtain uniform Ti3C2TxAnd (3) dispersing the mixture.
③ taking 50mgWO3 nano-particles, dispersing the nano-particles into 30ml of deoxidized water, and carrying out ultrasonic treatment for 30min to obtain uniform WO3And (3) dispersing the mixture.
Fourthly, Ti in the step II3C2TxThe dispersion liquid is dropwise added into WO in the step III3In the dispersion, the mixed solution is placed in a cell crusher for ultrasonic treatment for 3 hours to obtain Ti3C2Tx/WO3A composite nanomaterial dispersion.
Fifthly, respectively centrifuging the solution obtained in the step IV with deoxygenated water and ethanol (8000rpm, 5min) for three times, and drying the precipitate to obtain Ti3C2Tx/WO3A composite nanomaterial.
Furthermore, the distance between the ultrasonic probe of the cell crusher in the step (iv) and the cup bottom is 1cm, the ultrasonic power is 150W, and the ultrasonic pulse interval is 3 s. .
Further, Ti in the step (iv)3C2TxThe dropping time of the dispersion was controlled to 1 min.
Further, the drying temperature and time in the fifth step are 60 ℃ and 12 hours.
Ti3C2Tx/WO3Application of room-temperature ammonia gas sensor made of composite nano material, and Ti3C2Tx/WO3The room temperature ammonia gas sensor of the composite nano material can measure Ti at room temperature3C2Tx/WO3The resistance change of the composite nano material is used for detecting the ammonia concentration in industrial and agricultural production.
The working principle is as follows: the composite materials are all semiconductor type materials, and the Ti prepared by the preparation method of the invention3C2Tx/WO3The resistance of the room-temperature ammonia gas sensor made of the composite nano material is stable in the air, the resistance is about tens of kilo-ohms, electrons in ammonia gas molecules can be captured when the ammonia gas molecules are contacted, and the conductivity of the ammonia gas sensor is reduced and the resistance is increased due to the fact that the composite material integrally presents the property of a P-type semiconductor.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. WO selected by the invention3The nano particles have the advantages of sensitivity to ammonia gas, quick response time, good long-term stability, easy synthesis, rich oxygen active sites and the like; ti3C2TxThe material is a novel two-dimensional material, has large specific surface area and high carrier concentration, and the surface contains rich ammonia adsorption functional groups, so that Ti3C2TxThe material has excellent ammonia adsorption capacity; the combination of the two can greatly improve the response sensitivity of the sensor to ammonia gas.
2. Ti of the invention3C2Tx/WO3The room-temperature ammonia gas sensor made of the composite nano material has good repeatability, selectivity, sensitivity and long-term stability, can normally work at room temperature, and can accurately and quickly monitor the ammonia gas concentration in industrial and agricultural production.
Drawings
FIG. 1 shows Ti prepared by the present invention3C2Tx/WO3The structure schematic diagram of the room-temperature ammonia gas sensor of the composite nano material;
FIG. 2 shows Ti of the present invention3C2Tx/WO3Scanning Electron Microscope (SEM) images of the composite nanomaterials;
FIG. 3 shows Ti of the present invention3C2Tx/WO3X-ray photoelectron spectroscopy (XPS) of the composite nanomaterial on Ti 2 p;
FIG. 4 shows Ti of the present invention3C2Tx/WO3X-ray photoelectron spectroscopy (XPS) plots of the composite nanomaterial on W4 f;
FIG. 5 shows Ti prepared by the present invention3C2Tx/WO3A real-time resistance change curve diagram of the room-temperature ammonia gas sensor of the composite nano material to 1-5 ppm;
FIG. 6 shows Ti prepared by the present invention3C2Tx/WO3A real-time response change curve diagram of the room-temperature ammonia gas sensor of the composite nano material to 1 ppm;
FIG. 7 shows Ti prepared by the present invention3C2Tx/WO3A room-temperature ammonia gas sensor selectivity test curve graph of the composite nano material;
FIG. 8 shows Ti prepared by the present invention3C2Tx/WO3A long-term stability test curve diagram of a room-temperature ammonia gas sensor made of the composite nano material.
Labeled as: 1-alumina ceramic substrate layer, 2-Ag/Pd interdigital electrode layer and 3-Ti3C2Tx/WO3A composite film layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 8 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in FIG. 1, a Ti-based alloy3C2Tx/WO3Room temperature ammonia sensor of composite nanomaterial, Ti3C2Tx/WO3The room-temperature ammonia gas sensor made of the composite nano material sequentially comprises an alumina ceramic substrate layer 1, an Ag/Pd interdigital electrode layer 2 and Ti from bottom to top3C2Tx/WO3A composite material thin film layer 3 of Ti3C2Tx/WO3The composite material film is prepared on an alumina ceramic substrate by a dripping coating method, the thickness of the Ti3C2Tx/WO3 composite material film layer 3 is 1-5 mu m, the thickness of the Ag/Pd interdigital electrode layer 2 is 100-200nm, the number of pairs of fingers of the Ag/Pd interdigital electrode layer 2 is 5, and the distance between the fingers is 200 mu m.
The above Ti3C2Tx/WO3The preparation method of the room-temperature ammonia gas sensor made of the composite nano material comprises the following steps:
the method comprises the following steps: preparation of Ti by direct ultrasonic compounding3C2Tx/WO3A composite nanomaterial;
firstly, weighing 2g of Ti3AlC240ml of hydrofluoric acid (40%) was measured and poured into a Teflon beaker, and the Ti obtained was poured3AlC2Slowly adding into the beaker, stirring at room temperature (25 deg.C) at 200rpm for 24 hr, repeatedly centrifuging and washing the solution with deoxygenated water until pH is 6, and vacuum drying the precipitate to obtain Ti3C2TxAnd (5) standby.
② taking 50mg Ti in the step I3C2TxDispersing it in 30ml of deoxygenated water, sonicating 3Obtaining uniform Ti within 0min3C2TxAnd (3) dispersing the mixture.
③ taking 50mgWO3Dispersing the nano particles into 30ml of deoxygenated water, and performing ultrasonic treatment for 30min to obtain uniform WO3And (3) dispersing the mixture.
Fourthly, Ti in the step II3C2TxThe dispersion liquid is dropwise added into WO in the step III within 1min3In the dispersion, the mixed solution is placed in a cell crusher for ultrasonic treatment for 3 hours to obtain Ti3C2Tx/WO3The ultrasonic probe of the cell crusher is 1cm away from the cup bottom, the ultrasonic power is 150W, and the ultrasonic pulse interval is 3 s.
Fifthly, respectively centrifuging the solution obtained in the step IV with deoxygenated water and ethanol (8000rpm, 5min) for three times, and drying the precipitate at 60 ℃ for 12h to obtain Ti3C2Tx/WO3A composite nanomaterial.
Step two: preparation based on Ti3C2Tx/WO3Room temperature ammonia gas sensor made of composite nano material
A. Taking 10mg of prepared Ti3C2Tx/WO3The nano composite material is prepared by dispersing the material in 50 mu L of absolute ethyl alcohol, and performing ultrasonic treatment for 5min (power 150W) to obtain a uniform dispersion liquid.
B. Taking 3 mu L of the dispersion liquid obtained in the step A by using a liquid transfer device, and uniformly coating the dispersion liquid on a prefabricated interdigital electrode of an alumina ceramic substrate layer and an Ag/Pd interdigital electrode layer to obtain Ti3C2Tx/WO3A room temperature ammonia gas sensor of composite nano material.
Ti described in the present example3C2Tx/WO3The Scanning Electron Microscope (SEM) image of the composite nano material is shown in FIG. 2, which shows that the film has an obvious lamellar structure, and WO3Nanoparticles are attached to Ti3C2TxA surface.
The working principle is as follows: the composite materials are all semiconductor type materials, and the Ti prepared by the preparation method of the invention3C2Tx/WO3CompoundingThe resistance of the room-temperature ammonia gas sensor made of the nano material is stabilized to be about ten kilohms in the air, electrons in ammonia gas molecules can be captured when the ammonia gas molecules are contacted, and the conductivity of the ammonia gas sensor is reduced and the resistance is increased due to the fact that the composite material integrally presents the property of a P-type semiconductor.
WO selected by the invention3The nano particles have the advantages of sensitivity to ammonia gas, quick response time, good long-term stability, easy synthesis, rich oxygen active sites and the like; ti3C2TxThe material is a novel two-dimensional material, has large specific surface area and high carrier concentration, and the surface contains rich ammonia adsorption functional groups, so that Ti3C2TxThe material has excellent ammonia adsorption capacity; the combination of the two can greatly improve the response sensitivity of the sensor to ammonia gas.
Example 2
Ti3C2Tx/WO3Performance test of room-temperature ammonia gas sensor made of composite nano material
And carrying out peak separation treatment on peaks obtained by XPS characterization through peak separation software to obtain peak separation XPS energy spectrograms of a Ti 2p peak and a W4f peak of the composite material. As shown in FIG. 3, Ti3C2Tx/WO3The Ti 2p peak of the composite nanomaterial can be subdivided into 3 types of peaks, which can be seen to correspond to Ti3C2TxThe Ti-C and Ti-X peaks of the material can be obviously observed, further explaining that Ti3C2Tx/WO3Ti in composite nano material3C2TxPresence of (a). On the other hand, as shown in FIG. 4, from Ti3AlC2As can be seen from the peak energy spectrum of W4f of the composite material, the peak of W4f can be subdivided into 4 peaks at 35.69eV and 37.83eV, which correspond to W6+. The results further confirm Ti3C2Tx/WO3In composite materials WO3Presence of (a).
Ti prepared in example 13C2Tx/WO3Room temperature ammonia gas sensor made of composite nano material is stabilized in nitrogenIn the atmosphere, different ammonia gases are introduced and the resistance change of the sensor is monitored.
Ti described in the present example3C2Tx/WO3The dynamic response curve of the room temperature ammonia sensor of the composite nano material to 1-5ppm ammonia is shown in figure 5, and Ti can be seen3C2Tx/WO3The composite nano material film has high sensitivity and high resolution response to 1-5ppm ammonia gas.
Ti described in the present example3C2Tx/WO3The repeated response curve of the room temperature ammonia sensor of the composite nano material to 1ppm ammonia is shown in figure 6, and Ti can be seen3C2Tx/WO3The composite nano material film has good repeated response characteristics.
Ti described in the present example3C2Tx/WO3The selectivity curve of the room temperature ammonia gas sensor of the composite nano material is shown in FIG. 7, and Ti can be seen3C2Tx/WO3The composite nanometer material film has good selectivity.
Ti described in the present example3C2Tx/WO3The long-term stability curve of the room temperature ammonia gas sensor made of the composite nano material is shown in FIG. 8, and Ti can be seen3C2Tx/WO3The composite nano material film has good long-term stability.
Ti of the example3C2Tx/WO3The room-temperature ammonia gas sensor made of the composite nano material has good repeatability, selectivity, sensitivity and long-term stability, can normally work at room temperature, and can accurately and quickly monitor the ammonia gas concentration in industrial and agricultural production.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the embodiments and/or portions thereof may be made, and all changes, equivalents, and modifications which fall within the spirit and scope of the invention are therefore intended to be embraced by the appended claims.

Claims (9)

1. Based on Ti3C2Tx/WO3The room temperature ammonia gas sensor of the composite nano material is characterized in that the Ti3C2Tx/WO3The room-temperature ammonia gas sensor made of the composite nano material sequentially comprises an alumina ceramic substrate layer (1), an Ag/Pd interdigital electrode layer (2) and Ti from bottom to top3C2Tx/WO3A composite film layer (3).
2. A Ti according to claim 13C2Tx/WO3The room temperature ammonia gas sensor of the composite nano material is characterized in that the Ti3C2Tx/WO3The thickness of the composite material film layer (3) is 1-5 μm.
3. A Ti according to claim 13C2Tx/WO3The room-temperature ammonia gas sensor is characterized in that the thickness of the Ag/Pd interdigital electrode layer (2) is 100-200nm, the number of pairs of fingers of the Ag/Pd interdigital electrode layer (2) is 5, and the distance between the fingers is 200 mu m.
4. The Ti of claims 1 to 33C2Tx/WO3The preparation method of the room-temperature ammonia gas sensor made of the composite nano material is characterized by comprising the following steps of:
the method comprises the following steps: preparation of Ti by direct ultrasonic compounding3C2Tx/WO3A composite nanomaterial;
step two: preparation based on Ti3C2Tx/WO3The room temperature ammonia gas sensor of the composite nano material comprises the following specific steps:
A. taking 10mg of prepared Ti3C2Tx/WO3 composite nano material, dispersing the material in 50 mu L of absolute ethyl alcohol, and carrying out ultrasonic treatment for 5min at a power of 150W to obtain uniform dispersion liquid.
B. Taking 3 mu L of dispersion liquid obtained in the step A by using a liquid transfer machine, and uniformly coating the dispersion liquid on a prefabricated interdigital electrode of the alumina ceramic substrate layer (1)/Ag/Pd interdigital electrode layer (2) to obtain Ti3C2Tx/WO3A room temperature ammonia gas sensor of composite nano material.
5. The method for preparing room temperature ammonia gas sensor of Ti3C2Tx/WO3 composite nano-material as claimed in claim 4, wherein the materials in the first step are prepared according to the following ratio:
firstly, weighing 2g of Ti3AlC240ml of a 40% hydrofluoric acid solution was measured and poured into a polytetrafluoroethylene beaker, and the obtained Ti was poured into the beaker3AlC2Slowly adding into the beaker, stirring at room temperature at 200rpm for 24h, repeatedly centrifuging and washing the solution with deoxygenated water until pH is 6, and vacuum drying the precipitate to obtain Ti3C2TxStandby;
② taking 50mg Ti in the step I3C2TxDispersing the Ti powder into 30ml of deoxygenated water, and carrying out ultrasonic treatment for 30min to obtain uniform Ti3C2TxA dispersion liquid;
③ taking 50mgWO3Dispersing the nano particles into 30ml of deoxygenated water, and performing ultrasonic treatment for 30min to obtain uniform WO3A dispersion liquid;
fourthly, Ti in the step II3C2TxThe dispersion liquid is dropwise added into WO in the step III3In the dispersion, the mixed solution is placed in a cell crusher for ultrasonic treatment for 3 hours to obtain Ti3C2Tx/WO3A composite nanomaterial dispersion;
fifthly, the solution in the step IV is respectively centrifugally washed for three times by using deoxygenated water and ethanol, and the precipitate is dried to obtain Ti3C2Tx/WO3A composite nanomaterial.
6. A Ti according to claim 53C2Tx/WO3Preparation method of room-temperature ammonia gas sensor made of composite nano materialCharacterized in that the distance between the ultrasonic probe of the cell crusher in the step (IV) and the cup bottom is 1cm, the ultrasonic power is 150W, and the ultrasonic pulse interval is 3 s.
7. A Ti according to claim 43C2Tx/WO3The preparation method of the room temperature ammonia gas sensor made of the composite nano material is characterized in that Ti in the step IV3C2TxThe dropping time of the dispersion was controlled to 1 min.
8. A Ti according to claim 43C2Tx/WO3The preparation method of the room temperature ammonia gas sensor of the composite nano material is characterized in that the drying temperature and the drying time in the fifth step are 60 ℃ and 12 hours.
9. The Ti of claims 1 to 33C2Tx/WO3The application of the room-temperature ammonia gas sensor of the composite nano material is characterized in that the sensor is used for detecting the ammonia gas concentration.
CN202010958487.XA 2020-09-14 2020-09-14 Based on Ti 3 C 2 T x /WO 3 Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof Active CN112255278B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010958487.XA CN112255278B (en) 2020-09-14 2020-09-14 Based on Ti 3 C 2 T x /WO 3 Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010958487.XA CN112255278B (en) 2020-09-14 2020-09-14 Based on Ti 3 C 2 T x /WO 3 Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof

Publications (2)

Publication Number Publication Date
CN112255278A true CN112255278A (en) 2021-01-22
CN112255278B CN112255278B (en) 2022-11-22

Family

ID=74232159

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010958487.XA Active CN112255278B (en) 2020-09-14 2020-09-14 Based on Ti 3 C 2 T x /WO 3 Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN112255278B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113791124A (en) * 2021-05-20 2021-12-14 中国石油大学(华东) NO driven by wind power friction nano generator2Gas monitoring system and preparation method and application thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013154286A (en) * 2012-01-30 2013-08-15 Ohara Inc Photocatalytic porous body
CN105203617A (en) * 2015-09-11 2015-12-30 江苏大学 Electrochemical gas sensor for detecting ethanol and preparation method for electrochemical gas sensor
CN107607590A (en) * 2017-08-30 2018-01-19 吉林大学 One kind is based on the flower-shaped WO of PANI@3The flexible flat formula NH of nano sensitive material3Gas sensor and its application
CN109799267A (en) * 2019-04-02 2019-05-24 吉林大学 Plane humidity, ammonia gas sensor based on alkalization organ shape MXene sensitive material and preparation method thereof
CN110040766A (en) * 2019-04-02 2019-07-23 重庆大学 The gas-sensitive nano material and gas sensor of high moisture resistance
CN110095509A (en) * 2019-05-27 2019-08-06 电子科技大学 Ti3C2Tx/ polyaniline laminated film ammonia gas sensor and the preparation method and application thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013154286A (en) * 2012-01-30 2013-08-15 Ohara Inc Photocatalytic porous body
CN105203617A (en) * 2015-09-11 2015-12-30 江苏大学 Electrochemical gas sensor for detecting ethanol and preparation method for electrochemical gas sensor
CN107607590A (en) * 2017-08-30 2018-01-19 吉林大学 One kind is based on the flower-shaped WO of PANI@3The flexible flat formula NH of nano sensitive material3Gas sensor and its application
CN109799267A (en) * 2019-04-02 2019-05-24 吉林大学 Plane humidity, ammonia gas sensor based on alkalization organ shape MXene sensitive material and preparation method thereof
CN110040766A (en) * 2019-04-02 2019-07-23 重庆大学 The gas-sensitive nano material and gas sensor of high moisture resistance
CN110095509A (en) * 2019-05-27 2019-08-06 电子科技大学 Ti3C2Tx/ polyaniline laminated film ammonia gas sensor and the preparation method and application thereof

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
GUO XZ 等: "Enhanced ammonia sensing performance based on MXene-Ti3C2Tx multilayer nanoflakes functionalized by tungsten trioxide nanoparticles", 《JOURNAL OF COLLOID AND INTERFACE SCIENCE》 *
HUILING TAI 等: "Enhanced ammonia response of Ti3C2Tx nanosheets supported by TiO2 nanoparticles at room temperature", 《SENSORS AND ACTUATORS B: CHEMICAL》 *
JU MM 等: "Solvothermal synthesis of Ti3C2Tx/WO3-x flexible and self-standing films for aqueous proton supercapacitor electrodes", 《MATERIAL LETTERS》 *
XIAOBEI ZANG等: "Enhancing Capacitance Performance of Ti_3C_2T_x MXene as Electrode Materials of Supercapacitor:From Controlled Preparation to Composite Structure Construction", 《NANO-MICRO LETTERS》 *
YANG G 等: "Non-Invasive Flexible and Stretchable Wearable Sensors With Nano-Based Enhancement for Chronic Disease Care", 《IEEE REVIEWS IN BIOMEDICAL ENGINEERING》 *
张茜 等: "改性MnO2复合丙烯酸酯系高吸油树脂的合成及性能", 《中国化学会第28届学术年会第5分会场摘要集》 *
鲍思洁 等: "水热法制备Ti3C2Tx-WO3复合材料及其对乙醛气体的传感性能", 《硅酸盐学报》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113791124A (en) * 2021-05-20 2021-12-14 中国石油大学(华东) NO driven by wind power friction nano generator2Gas monitoring system and preparation method and application thereof

Also Published As

Publication number Publication date
CN112255278B (en) 2022-11-22

Similar Documents

Publication Publication Date Title
Wang et al. Rapid detection of low concentration CO using Pt-loaded ZnO nanosheets
Li et al. Bimetal PdAu decorated SnO2 nanosheets based gas sensor with temperature-dependent dual selectivity for detecting formaldehyde and acetone
Salehi et al. Highly sensitive carbon nanotubes–SnO2 nanocomposite sensor for acetone detection in diabetes mellitus breath
Leghrib et al. Gas sensors based on multiwall carbon nanotubes decorated with tin oxide nanoclusters
CN109342522B (en) Polypyrrole/graphene composite material-based resistance type NH3Sensor, preparation method and application thereof
Wen et al. MXene-derived TiO2 nanosheets decorated with Ag nanoparticles for highly sensitive detection of ammonia at room temperature
CN108872325A (en) One kind being based on SnSe2/SnO2Nitrogen dioxide gas sensor, preparation process and the application of hetero-junctions
CN110887874B (en) Moisture-sensitive sensor based on perovskite and preparation method and application thereof
CN112229879A (en) TiO2-Ti3C2TxComposite film gas sensor and preparation method and application thereof
CN109342523A (en) Based on the resistor-type NO for being rich in the grapheme modified composite material of Lacking oxygen stannic oxide2Sensor, preparation method and applications
CN112578011A (en) Sensor and detection method for detecting dopamine and uric acid
CN109828009A (en) A kind of H based on metal oxide semiconductor films material2S gas sensor and preparation method thereof
CN111855756A (en) Hydrogen sensor based on Pd-Ag alloy nanocrystalline and preparation method thereof
Bandara et al. Surface engineering of electrodeposited cuprous oxide (Cu2O) thin films: Effect on hydrophobicity and LP gas sensing
CN112255278B (en) Based on Ti 3 C 2 T x /WO 3 Room-temperature ammonia gas sensor made of composite nano material, and preparation method and application thereof
Ren et al. Grain boundaries dependent hydrogen sensitivity in MAO-TiO2 thin films sensors
CN110687185A (en) Based on SnO2@Fe2O3Low-power-consumption acetone gas sensor of nano heterostructure sensitive material and preparation method thereof
CN114563454A (en) Based on Au/Ti3C2TxDopamine electrochemical sensor for modifying glassy carbon working electrode and preparation method thereof
Li et al. Fabrication and characterization of a low power consumption ethanol gas sensor based on a suspended micro-hotplate
CN110615693B (en) Hydrogen sulfide gas sensing material, sensor, preparation method and use method
CN109521064B (en) Room temperature NO2 sensor based on WO3 hollow sphere and preparation method thereof
Wang et al. A room temperature oxygen gas sensor based on hierarchical TiO 2
CN111189887A (en) Humidity sensor and manufacturing method and application thereof
CN111077190A (en) Resistance type thin film nitrogen dioxide sensor and preparation method and application thereof
CN109884132A (en) MoO is adulterated based on bobbles shape Ni3The dimethylbenzene sensor of nano sensitive material, preparation method and applications

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
GR01 Patent grant
GR01 Patent grant