CN113406155A - Tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and preparation method thereof - Google Patents
Tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and preparation method thereof Download PDFInfo
- Publication number
- CN113406155A CN113406155A CN202110695696.4A CN202110695696A CN113406155A CN 113406155 A CN113406155 A CN 113406155A CN 202110695696 A CN202110695696 A CN 202110695696A CN 113406155 A CN113406155 A CN 113406155A
- Authority
- CN
- China
- Prior art keywords
- polyacid
- gas
- layer
- tin oxide
- tungsten oxide
- 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
Links
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000002121 nanofiber Substances 0.000 title claims abstract description 31
- 229910001887 tin oxide Inorganic materials 0.000 title claims abstract description 28
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910001930 tungsten oxide Inorganic materials 0.000 title claims abstract description 27
- 239000011540 sensing material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 111
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000010410 layer Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008859 change Effects 0.000 claims abstract description 5
- 239000012792 core layer Substances 0.000 claims abstract description 5
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 4
- 238000001354 calcination Methods 0.000 claims abstract description 3
- 230000003647 oxidation Effects 0.000 claims abstract description 3
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 3
- 229920006324 polyoxymethylene Polymers 0.000 claims description 17
- 238000011084 recovery Methods 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- DHRLEVQXOMLTIM-UHFFFAOYSA-N phosphoric acid;trioxomolybdenum Chemical compound O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.OP(O)(O)=O DHRLEVQXOMLTIM-UHFFFAOYSA-N 0.000 claims description 3
- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 claims description 3
- CGFYHILWFSGVJS-UHFFFAOYSA-N silicic acid;trioxotungsten Chemical compound O[Si](O)(O)O.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 CGFYHILWFSGVJS-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000004044 response Effects 0.000 description 22
- 239000004065 semiconductor Substances 0.000 description 19
- 238000011160 research Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000006798 recombination Effects 0.000 description 5
- 238000005215 recombination Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 238000000634 powder X-ray diffraction Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 208000004930 Fatty Liver Diseases 0.000 description 1
- 208000007882 Gastritis Diseases 0.000 description 1
- 206010019708 Hepatic steatosis Diseases 0.000 description 1
- 208000006550 Mydriasis Diseases 0.000 description 1
- 206010036105 Polyneuropathy Diseases 0.000 description 1
- 206010061921 Psychotic disorder due to a general medical condition Diseases 0.000 description 1
- 206010038669 Respiratory arrest Diseases 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 description 1
- 208000003443 Unconsciousness Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 208000023652 chronic gastritis Diseases 0.000 description 1
- 208000019425 cirrhosis of liver Diseases 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 230000035618 desquamation Effects 0.000 description 1
- 230000007646 directional migration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 208000010706 fatty liver disease Diseases 0.000 description 1
- 230000037406 food intake Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000003680 myocardial damage Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002073 nanorod Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000001907 polarising light microscopy Methods 0.000 description 1
- 230000007824 polyneuropathy Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 231100000240 steatosis hepatitis Toxicity 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910003145 α-Fe2O3 Inorganic materials 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention provides a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and a preparation method thereof. The material main body is three layers of coaxial nanofiber materials, a core layer is tin oxide, a middle layer is polyacid, a shell layer is tungsten oxide, and the three substances are distributed in a three-layer cable shape. The existence of gas such as ethanol in the air can be detected by utilizing the change of an electrochemical signal at a certain working temperature. The material is prepared by combining a coaxial electrostatic spinning method with oxidation calcination, has simple method and low cost, can effectively detect gases such as ethanol with low concentration in the air, and is suitable for development and production of a polyacid type high-performance gas sensor.
Description
Technical Field
The invention belongs to the technical field of gas sensors, and relates to a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and a preparation method thereof.
Background
Ethanol, commonly known as ethanol, is an organic substance, of formula C2H6O, ethanol is a flammable, volatile, colorless and transparent liquid at normal temperature and pressure. The ethanol vapor can form an explosive mixture with air and can be mutually soluble with water in any proportion. The ethanol has wide application range, and can be used for preparing acetic acid, beverages, essence, fuels, fuel and the like. In medical treatment, 70-75% volume fraction ethanol is also commonly used as a disinfectant, and has wide application in national defense chemical industry, medical treatment and health, food industry, industrial and agricultural production. Because ethanol is volatile, the vapor and air can form explosive mixture, and the explosion caused by open fire and high heat energy is easy to cause combustion. Contact with the oxidant causes a chemical reaction or combustion. The ethanol gas can easily enter human body through inhalation, ingestion, percutaneous absorption and other ways. The human body inhales excessive ethanol to cause life risks such as loss of consciousness, dilated pupils, irregular breathing, shock, heart circulation failure, respiratory arrest and the like; more serious patients may cause polyneuropathy, chronic gastritis, fatty liver, liver cirrhosis, myocardial damage, and organic psychosis. Prolonged contact with the skin can cause dryness, desquamation, chapping and dermatitis. Based on the above analysis, it is important to detect ethanol gas.
A gas sensor is a device that can convert certain information of a gas, including concentration and species, into data information that can be utilized. The physical and chemical properties of various gases are used to convert the change of the monitored gas into electric signals which can be easily processed, so that people can control and apply the gas correctly and effectively. Is the first link for realizing automatic detection and automatic control. The semiconductor material is one of the cores of the gas sensor, and has high sensitivity and simple operation. The practical application of the gas sensitive material with low cost and high performance is realized, and the development of a novel semiconductor material is urgently needed. To date, over more than half a centuryIn the research, tens of gas sensitive materials are successively developed, developed and applied. However, the research focus is still on metal oxide semiconductors, wherein SnO2、ZnO、TiO2、WO3、In2O3And alpha-Fe2O3The n-type semiconductor material occupies more than 90% of the research field of gas sensing. However, the single-component semiconductor material has a high carrier recombination rate, which limits the performance of the gas-sensitive material. This also becomes a scientific problem limiting the development of gas sensitive materials. With the continuous and deep research of semiconductor gas sensors, people find that the gas-sensitive performance of semiconductor materials can be obviously improved by constructing a reasonable heterojunction. In the material of the zero-dimensional nanoparticles, at the grain boundaries, a large amount of recombination of electron and hole pairs can occur due to the presence of defects; at the same time, there are long carrier migration paths with random directions, which limit the gas-sensitive performance of the material. The material with the one-dimensional structure, such as the nanotube, the nanorod and the nanofiber, can provide a preferential directional migration path for a current carrier, and effectively promotes the separation of electrons and holes, thereby improving the photoelectric performance of the material.
Polyoxometalates (i.e. polyacids, Polyoxometalates, POMs) are polynuclear complexes, have a history of development for nearly two hundred years so far, and have become an important research field in inorganic chemistry. In recent years, polyacid has been studied in gas sensing. In 2011, Suzhou professor combined ascorbic acid and silicotungstic acid, and the subject group showed a significant color change in ammonia. In 2013, Khan and the like prepare polyvanadate with a frame structure, and have certain electrochemical response to the existence of nitrogen oxides. Respectively introducing polyacid into SnO by professor of Shanxi university in northeast China2、BiVO3And TiO2In addition, the sensor has sensing function on gases such as formaldehyde, toluene and the like. In addition, polyoxometallate (polyacid for short) is a good electron acceptor, and can inhibit the recombination of photon-generated carriers and promote the migration of the photon-generated carriers by capturing photon-generated electrons of a semiconductor conduction band, thereby being beneficial to electron transfer. However, in previous studies, electricity using polyacids was mainly usedSubaceptor properties, in simple molecularly doped form, for introduction of polyacids into SnO2And the like, in order to improve the gas-sensitive performance of the original semiconductor. The polyacid in the semiconductor material has low content, plays a main role in the original semiconductor material, is in a disordered state, is distributed on the surface and bulk phase of the semiconductor material, and cannot form a polyacid/semiconductor heterojunction. There has been no report on the study of polyacids to form heterojunctions with semiconductor materials and to be used as gas sensing. Therefore, the deep research on the gas sensing performance of the polyacid/semiconductor heterojunction material has become a key scientific problem for developing the application of the polyacid in devices such as gas sensors and the like. In addition, the influence of the structure of polyacid on gas sensing performance has not been fully revealed and studied, which limits the development and application of polyacid/semiconductor materials in the field of devices such as gas sensors. Thus, we introduced the polyacid to SnO2@WO3Two heterojunctions are formed, thereby obviously improving WO3The detection performance of the gas sensor.
Disclosure of Invention
The invention aims to provide a semiconductor/polyacid/semiconductor series heterojunction material and a preparation method thereof for the first time. Wherein the material is SnO2@POMs@WO3The structure of the three-layer coaxial nanofiber is shown in figure 1, a core layer is tin oxide, a middle layer is polyacid, a shell layer is tungsten oxide, and the three substances are distributed in a three-layer cable shape. Phosphomolybdic acid (PMo) with a polyacid of the Keggin type12) Phosphotungstic acid (PW)12) And silicotungstic acid (SiW)12) The preparation method can be prepared by a coaxial electrostatic spinning technology and a calcining oxidation mode.
The second purpose of the invention is to solve the scientific problem of high electron hole recombination rate of the semiconductor gas-sensitive material. The material prepared by the invention has two series-connected heterogeneous interfaces, can promote the migration of current carriers and inhibit the electron hole recombination, thereby improving the gas-sensitive performance of the material. And SnO without addition of polyacid2@WO3Fiber-to-fiber ratio, SnO2@POMs@WO3The three-layer coaxial nanofiber has more excellent gas-sensitive performance.
The third purpose of the invention is to react the polyacid for the first timeFor use in connection with WO3The gas sensor of (1) is used for investigating the promotion effect of polyacid on the gas-sensitive performance of organic gases such as ethanol, acetone and the like.
SnO provided by the invention2@POMs@WO3The three-layer coaxial nanofiber gas sensing material can be prepared by the following method:
firstly, dissolving a certain amount of ammonium metatungstate and PVP in an organic solvent, and stirring at room temperature to obtain a transparent and uniform shell precursor solution; then dissolving a certain amount of stannic chloride and PVP in an organic solvent, and stirring at room temperature to obtain a uniform and transparent core layer precursor solution; and dissolving a certain amount of polyacid and PVP in an organic solvent, and stirring at room temperature to obtain a transparent and uniform intermediate layer precursor solution. Then the solution is spun under a certain voltage by a coaxial electrostatic spinning technology to obtain SnO2@POMs@WO3Precursor fiber is calcined at high temperature to prepare SnO2@POMs@WO3Three layers of coaxial nanofibers (the morphology is shown in figure 2).
SnO prepared by the method2@POMs@WO3The three-layer coaxial nanofiber is characterized by X-ray powder diffraction (PXRD, shown in figure 3) to determine the composition. It was found that the peak positions and peak intensities of the synthesized material and tin oxide pentoxide were consistent in the XRD spectrum, which confirmed that the material synthesized by the above-mentioned method was indeed tin oxide and tungsten oxide, and the presence of polyacid was not observed in the XRD spectrum due to the small amount of polyacid.
SnO provided by the invention2@POMs@WO3The application of the three-layer coaxial nanofiber gas sensing material in gas sensing has the following working conditions:
the above materials can be coated on the gas sensor shown in fig. 4. The gas sensor consists of Al with a pair of gold electrodes on the outer surface2O3Insulating ceramic tube, through Al2O3Ni-Gr alloy heating wire and four Pt wires in insulating ceramic tube and Al-coated Ni-Gr alloy heating wire2O3A hexagonal base consisting of the external surface of the insulating ceramic tube and the sensitive material film on a pair of gold electrodes, and four posts of the hexagonal base connected with four platinum wiresConnected to four signal lines and the remaining two columns connecting two heater lines, the sensor exposed to air has a stable resistance value when a certain current is applied, and when the sensitive material film comes into contact with a certain amount of the gas to be measured (ethanol), the resistance value is reduced until a stable value is reached. According to the principle, when the sensor works under a certain current and a corresponding certain temperature, if the resistance value is reduced, the existence of the gas to be measured is indicated.
The tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material provided by the invention has the following characteristics:
1. the tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material has a SnO main body2@POMs@WO3The three-layer coaxial nanofiber comprises a core layer made of tin oxide, a middle layer made of polyacid, a shell layer made of tungsten oxide and three substances distributed in a three-layer cable shape.
2. The tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material is coated on a ceramic tube electrode and has a sensing effect on ethanol gas at a certain working temperature. The first application of the polyacid to the composition based on WO3The gas sensor of (1) is used for investigating the promotion effect of polyacid on the gas-sensitive performance of organic gases such as ethanol, acetone and the like. .
3. The tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material has the advantages of optimal response performance to 100ppm ethanol, high sensitivity, quick response and recovery rate, good selectivity to ethanol gas and good long-term stability.
Drawings
Fig. 1 is a structural schematic diagram of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material.
FIG. 2 is a transmission electron microscope image and a high-power transmission electron microscope image of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material.
Fig. 3 is an X-ray powder diffraction pattern of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material.
Fig. 4 is a schematic structural diagram of the tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensor.
FIG. 5 is a curve diagram of response amplitude of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material to 100ppm ethanol at different temperatures.
FIG. 6 is a graph of the dynamic response and recovery characteristics of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material at 280 ℃ for 5ppm to 100ppm ethanol gas.
FIG. 7 is a graph of the dynamic response and recovery time of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material to 100ppm ethanol gas at 280 ℃.
FIG. 8 is a bar graph of response characteristics of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material to 100ppm of different types of gases at 280 ℃.
FIG. 9 is a graph of the response amplitude change of a tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material to 100ppm ethanol gas within 30 days.
Detailed Description
To further illustrate the present invention, the following examples are set forth without limiting the scope of the invention as defined by the appended claims.
This example is an SnO with the best content of the three groups of polyacids prepared in the summary of the invention2@POMs(PMo12、PW12、SiW12)@WO3Testing the performance of the gas sensor by adding SnO2@POMs(1％PMo12、3％PW12、3％SiW12)@WO3Gas sensor and SnO2@WO3The gas sensor is subjected to a comparative experiment to test the performance; here, the gas response amplitude of the gas sensor is defined as S ═ Ra/RgWhere Ra is the resistance in air and Rg is the resistance in the gas to be measured, and further, the response or recovery time is 90% of the time it takes for the resistance value of the gas sensor to stabilize after being added or removed from the gas bottle to be measured.
Specific example 1:
SnO is reacted as shown in FIG. 52@POMs(1％PMo12、3％PW12、3％SiW12)@WO3Gas sensor and SnO2@WO3The gas sensor tests the response performance of 100ppm ethanol at different temperatures of 240-360 ℃; as can be seen from the figure, four groups of sensors all showed temperature-dependent sensing characteristics, SnO2@POMs(1％PMo12、3％PW12、3％SiW12)@WO3Gas sensor and SnO2@WO3The response of the gas sensor reaches the maximum value at 280 ℃; therefore, the following other gas sensitive performance tests were all performed at the optimum temperature of 280 ℃.
As shown in FIG. 6, SnO2@POMs(1％PMo12、3％PW12、3％SiW12)@WO3Gas sensor and SnO2@WO3The gas sensor is used for testing the dynamic response and recovery characteristics of ethanol gas with different concentrations of 5ppm to 100ppm at 280 ℃: the results show that the response value is gradually increased along with the increase of the ethanol concentration, and SnO2@3％PW12@WO3The gas sensor has the best sensitivity to ethanol, and the response can reach 8.8 at 100 ppm.
As shown in FIG. 7, by reacting SnO2@POMs(1％PMo12、3％PW12、3％SiW12)@WO3Gas sensor and SnO2@WO3The gas sensor carries out response recovery characteristic test on 100ppm ethanol at 280 ℃, and the result shows that SnO2@1％PMo12@WO3The response time and recovery time of the gas sensor are 1.8s and 69.1s respectively, and the response recovery time is fastest, which indicates that SnO2@1％PMo12@WO3The gas sensor has a rapid response and recovery rate to ethanol gas.
As shown in FIG. 8, by reacting SnO2@POMs(1％PMo12、3％PW12、3％SiW12)@WO3Gas sensor and SnO2@WO3The gas sensor is used for testing the response characteristics of 100ppm different types of gases at 280 ℃, wherein SnO2@3％PW12@WO3Gas response of gas sensor to 100ppm ethanol gasThe amplitude is up to 9, which shows that SnO2@3％PW12@WO3The gas sensor has good selectivity to ethanol gas.
As shown in FIG. 9, by reacting SnO2@POMs(1％PMo12、3％PW12、3％SiW12)@WO3The gas sensor is subjected to a stability test for 30 days, and the result shows that SnO2@3％SiW12@WO3The response amplitude to the ethanol gas is always kept at about 5.5, which shows that SnO2@3％SiW12@WO3The gas sensor has good long-term stability to ethanol.
Claims (4)
1. A tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material is characterized in that: has gas sensing performance, is a tin oxide/polyacid/tungsten oxide composite material with a molecular formula of SnO2@POMs@WO3The polyacid is Keggin type phosphomolybdic acid, phosphotungstic acid and silicotungstic acid.
2. The tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material of claim 1, characterized in that: the gas sensor can be prepared by a coaxial electrostatic spinning technology and a calcining oxidation mode, and can be manufactured by coating a sensitive material film.
3. The tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material according to claim 1, characterized in that: under a certain working temperature, the change of an electrochemical signal can be utilized to detect the existence of gases such as ethanol in the air, thereby realizing gas sensing.
4. The tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material according to claim 1, characterized in that: the main body is three layers of coaxial nanofiber materials, a core layer is tin oxide, a middle layer is polyacid, a shell layer is tungsten oxide, the three materials are distributed in a three-layer cable shape, and the composition and the structure of the materials are determined; the material can stably exist on the electrode of the ceramic tube in the form of a film, so that the gas-sensitive reaction can be directly carried out in the air; the gas-sensitive reaction method is simple, the recovery is complete, and the environment is not polluted; the gas-sensitive film can be repeatedly used, and the gas sensitivity can still be maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695696.4A CN113406155B (en) | 2021-06-23 | 2021-06-23 | Tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695696.4A CN113406155B (en) | 2021-06-23 | 2021-06-23 | Tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113406155A true CN113406155A (en) | 2021-09-17 |
| CN113406155B CN113406155B (en) | 2022-08-05 |
Family
ID=77682629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110695696.4A Expired - Fee Related CN113406155B (en) | 2021-06-23 | 2021-06-23 | Tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113406155B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314652A (en) * | 2021-12-21 | 2022-04-12 | 长春理工大学 | Titanium dioxide/polyacid/ferric oxide three-layer coaxial nanobelt gas sensing material and preparation method thereof |
Citations (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580011A (en) * | 1991-09-25 | 1993-03-30 | Nikon Corp | Thin-film chemical sensor with electrical heating element |
| CN1271096A (en) * | 1999-04-16 | 2000-10-25 | 电子科技大学 | Nitrogen oxide sensor made of doped polyaniline and its making process |
| US6277523B1 (en) * | 1996-03-27 | 2001-08-21 | Saint-Gobain Vitrage | Electrochemical device |
| TW200624807A (en) * | 2005-01-07 | 2006-07-16 | Univ Chung Yuan Christian | Using extended gate field effect transistor to design and analyze the chinese medicine biosensor |
| KR20070066859A (en) * | 2005-12-23 | 2007-06-27 | 한국과학기술연구원 | Ultra-sensitive metal oxide gas sensor and fbrication method thereof |
| CN101318704A (en) * | 2008-07-08 | 2008-12-10 | 清华大学 | Tungstic oxide nano-wire and method for preparing tungstic oxide nano-wire gas-sensitive sensor |
| CN101399122A (en) * | 2007-08-29 | 2009-04-01 | 韩国科学技术研究院 | Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same |
| CN101437663A (en) * | 2004-11-09 | 2009-05-20 | 得克萨斯大学体系董事会 | Fabrication and application of nanofiber ribbons and sheets and twisted and non-twisted nanofiber yarns |
| CN101671050A (en) * | 2009-09-28 | 2010-03-17 | 武汉大学 | Method for preparing nano SnO2 material by utilizing exothermal reaction |
| KR20100079470A (en) * | 2008-12-31 | 2010-07-08 | 전남대학교산학협력단 | Method for producing carbon composite nano fiber with photocatalytic activity, carbon composite nano fiber with photocatalytic activity produced by the same method, filters comprising the carbon nano fiber and tio2,sio2 sol solutions used for thermo stable photo catalyst |
| CN101874274A (en) * | 2007-11-27 | 2010-10-27 | 玛丽亚·斯特罗姆 | Composite materials including an intrinsically conducting polymer, and methods and devices |
| CN102191571A (en) * | 2011-03-11 | 2011-09-21 | 长春理工大学 | Preparation method of coaxial three-layer nano cable NiO@SnO2@TiO2 |
| CN102331443A (en) * | 2011-07-13 | 2012-01-25 | 东华大学 | Acetone gas sensor and manufacturing method thereof |
| CN102661978A (en) * | 2012-03-30 | 2012-09-12 | 长春理工大学 | Plane methane gas sensor with double-sensitive layer structure and manufacturing method thereof |
| US20120267234A1 (en) * | 2011-04-22 | 2012-10-25 | Sun Catalytix Corporation | Nanostructures, Systems, and Methods for Photocatalysis |
| WO2013007966A1 (en) * | 2011-07-08 | 2013-01-17 | Cambridge Display Technology Limited | Organic semiconductor solution |
| CN104118904A (en) * | 2014-07-01 | 2014-10-29 | 济南大学 | Preparation method and application of three-dimensional hollow multilevel-structured stannic oxide gas-sensitive material |
| CN104297416A (en) * | 2014-11-03 | 2015-01-21 | 北京联合大学 | Cataluminescence sensitive material for formaldehyde, benzene and ammonia in air |
| US20150160149A1 (en) * | 2013-12-06 | 2015-06-11 | Samsung Electronics Co., Ltd. | Sensing material for gas sensor, gas sensor comprising the sensing material, method of preparing the sensing material, and method of manufacturing the gas sensor |
| US20160041116A1 (en) * | 2014-08-06 | 2016-02-11 | Korea Advanced Institute Of Science And Technology | Composite metal oxide materials including polycrystalline nanofibers, microparticles, and nanoparticles, gas sensors using the same as a sensing material thereof, and manufacturing methods thereof |
| CN105388138A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨工业大学 | Optical measurement method based on tungsten oxide serving as ethyl alcohol gas sensing material |
| US20160077069A1 (en) * | 2014-09-17 | 2016-03-17 | Korea Advanced Institute Of Science And Technology | Gas sensor and member using metal oxide semiconductor nanofibers including nanoparticle catalyst functionalized by bifunctional nano-catalyst included within apoferritin, and manufacturing method thereof |
| CN105486724A (en) * | 2015-11-20 | 2016-04-13 | 吉林大学 | NO2 sensor based on precious metal Ag-supported mesoporous WO3 material and preparation method thereof |
| CN105606660A (en) * | 2015-12-24 | 2016-05-25 | 东北师范大学 | Gas-sensitive material for detecting NO2 and method for manufacturing gas-sensitive element made of gas-sensitive material |
| CN105603713A (en) * | 2015-11-13 | 2016-05-25 | 大连民族大学 | Preparation method and applications of SnO2/ZnO nano composite fiber material with coaxial heterostructure |
| CN105628748A (en) * | 2015-12-24 | 2016-06-01 | 东北师范大学 | Platinum-loaded tin dioxide nanofiber gas-sensitive material and gas-sensitive element made from same |
| CN105738449A (en) * | 2016-01-13 | 2016-07-06 | 东北师范大学 | Stannic oxide-polyacid compound gas sensing material and preparation method thereof |
| CN105784789A (en) * | 2016-05-25 | 2016-07-20 | 吉林大学 | NH3 sensor of mesoporous WO3 material based on supported precious metal Pt and preparation method of NH3 sensor |
| KR20170015128A (en) * | 2015-07-31 | 2017-02-08 | 한양대학교 에리카산학협력단 | Multi-layer ceramic/metal type gas sensor and manufacturing method of the same |
| US20170059538A1 (en) * | 2015-09-01 | 2017-03-02 | Hyundai Motor Company | Chemochromic nanoparticles, method for manufacturing the same, and hydrogen sensor comprising the same |
| CN107315036A (en) * | 2017-08-06 | 2017-11-03 | 潘金文 | One kind is based on SnO2The alcohol gas sensor of composite nano fiber |
| CN107827150A (en) * | 2017-12-14 | 2018-03-23 | 上海交通大学 | A kind of nickel doped tin oxide nano material, formaldehyde gas sensor and preparation method |
| CN108205002A (en) * | 2017-12-19 | 2018-06-26 | 太原理工大学 | A kind of high gas response and the LaFeO of selectivity3Base alcohol gas sensor element and preparation method thereof |
| CN108593711A (en) * | 2018-02-05 | 2018-09-28 | 广东为邦消防检测有限公司 | A kind of high-precision gas detector |
| CN108760629A (en) * | 2018-05-22 | 2018-11-06 | 青海大学 | A kind of preparation method and applications of multi-metal oxygen cluster functionalization cadmium sulfide nano wires sensor array |
| CN109970108A (en) * | 2019-04-15 | 2019-07-05 | 青岛大学 | A kind of gas sensor and preparation method thereof based on nanometer nickel sulfide composite material |
| CN110044973A (en) * | 2019-05-05 | 2019-07-23 | 吉林大学 | Plane formula room temperature ammonia gas sensor and preparation method thereof based on the organic sensitive thin film of TPA-DCPP |
| CN110609445A (en) * | 2014-01-14 | 2019-12-24 | Az电子材料卢森堡有限公司 | Polyoxometallate and heteropolyoxometalate compositions and methods of use thereof |
| US20200088668A1 (en) * | 2018-09-17 | 2020-03-19 | Massachusetts Institute Of Technology | Switchable single-walled carbon nanotube-polymer composites for co2 sensing |
| JP2020056643A (en) * | 2018-10-01 | 2020-04-09 | 国立大学法人九州大学 | Gas sensor member, gas sensor, and gas sensor member manufacturing method |
| US20200225185A1 (en) * | 2019-01-15 | 2020-07-16 | Korea Advanced Institute Of Science And Technology | Sensor including nanostructures and method for manufacturing the same |
| US20200362128A1 (en) * | 2019-05-14 | 2020-11-19 | National Tsinghua University | Method of fabricating patterned cellulose nanocrystal composite nanofibers and nano thin films and their applications |
| CN112225926A (en) * | 2020-09-25 | 2021-01-15 | 山东大学 | Covalent organic material film and preparation method and application thereof |
| CN112226702A (en) * | 2020-08-17 | 2021-01-15 | 蓬莱市超硬复合材料有限公司 | Tungsten oxide alloy material and preparation method thereof |
| CN112578007A (en) * | 2020-12-02 | 2021-03-30 | 长春理工大学 | Indium oxide-polyacid composite gas sensing material and preparation method thereof |
-
2021
- 2021-06-23 CN CN202110695696.4A patent/CN113406155B/en not_active Expired - Fee Related
Patent Citations (46)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580011A (en) * | 1991-09-25 | 1993-03-30 | Nikon Corp | Thin-film chemical sensor with electrical heating element |
| US6277523B1 (en) * | 1996-03-27 | 2001-08-21 | Saint-Gobain Vitrage | Electrochemical device |
| CN1271096A (en) * | 1999-04-16 | 2000-10-25 | 电子科技大学 | Nitrogen oxide sensor made of doped polyaniline and its making process |
| CN101437663A (en) * | 2004-11-09 | 2009-05-20 | 得克萨斯大学体系董事会 | Fabrication and application of nanofiber ribbons and sheets and twisted and non-twisted nanofiber yarns |
| TW200624807A (en) * | 2005-01-07 | 2006-07-16 | Univ Chung Yuan Christian | Using extended gate field effect transistor to design and analyze the chinese medicine biosensor |
| KR20070066859A (en) * | 2005-12-23 | 2007-06-27 | 한국과학기술연구원 | Ultra-sensitive metal oxide gas sensor and fbrication method thereof |
| CN101091111A (en) * | 2005-12-23 | 2007-12-19 | 韩国科学技术研究院 | Ultra-sensitive metal oxide gas sensor and fabrication method thereof |
| CN101399122A (en) * | 2007-08-29 | 2009-04-01 | 韩国科学技术研究院 | Dye-sensitized solar cell with metal oxide layer containing metal oxide nanoparticles produced by electrospinning and method for manufacturing same |
| CN101874274A (en) * | 2007-11-27 | 2010-10-27 | 玛丽亚·斯特罗姆 | Composite materials including an intrinsically conducting polymer, and methods and devices |
| CN101318704A (en) * | 2008-07-08 | 2008-12-10 | 清华大学 | Tungstic oxide nano-wire and method for preparing tungstic oxide nano-wire gas-sensitive sensor |
| KR20100079470A (en) * | 2008-12-31 | 2010-07-08 | 전남대학교산학협력단 | Method for producing carbon composite nano fiber with photocatalytic activity, carbon composite nano fiber with photocatalytic activity produced by the same method, filters comprising the carbon nano fiber and tio2,sio2 sol solutions used for thermo stable photo catalyst |
| CN101671050A (en) * | 2009-09-28 | 2010-03-17 | 武汉大学 | Method for preparing nano SnO2 material by utilizing exothermal reaction |
| CN102191571A (en) * | 2011-03-11 | 2011-09-21 | 长春理工大学 | Preparation method of coaxial three-layer nano cable NiO@SnO2@TiO2 |
| US20120267234A1 (en) * | 2011-04-22 | 2012-10-25 | Sun Catalytix Corporation | Nanostructures, Systems, and Methods for Photocatalysis |
| WO2013007966A1 (en) * | 2011-07-08 | 2013-01-17 | Cambridge Display Technology Limited | Organic semiconductor solution |
| CN102331443A (en) * | 2011-07-13 | 2012-01-25 | 东华大学 | Acetone gas sensor and manufacturing method thereof |
| CN102661978A (en) * | 2012-03-30 | 2012-09-12 | 长春理工大学 | Plane methane gas sensor with double-sensitive layer structure and manufacturing method thereof |
| US20150160149A1 (en) * | 2013-12-06 | 2015-06-11 | Samsung Electronics Co., Ltd. | Sensing material for gas sensor, gas sensor comprising the sensing material, method of preparing the sensing material, and method of manufacturing the gas sensor |
| CN110609445A (en) * | 2014-01-14 | 2019-12-24 | Az电子材料卢森堡有限公司 | Polyoxometallate and heteropolyoxometalate compositions and methods of use thereof |
| CN104118904A (en) * | 2014-07-01 | 2014-10-29 | 济南大学 | Preparation method and application of three-dimensional hollow multilevel-structured stannic oxide gas-sensitive material |
| US20160041116A1 (en) * | 2014-08-06 | 2016-02-11 | Korea Advanced Institute Of Science And Technology | Composite metal oxide materials including polycrystalline nanofibers, microparticles, and nanoparticles, gas sensors using the same as a sensing material thereof, and manufacturing methods thereof |
| US20160077069A1 (en) * | 2014-09-17 | 2016-03-17 | Korea Advanced Institute Of Science And Technology | Gas sensor and member using metal oxide semiconductor nanofibers including nanoparticle catalyst functionalized by bifunctional nano-catalyst included within apoferritin, and manufacturing method thereof |
| CN104297416A (en) * | 2014-11-03 | 2015-01-21 | 北京联合大学 | Cataluminescence sensitive material for formaldehyde, benzene and ammonia in air |
| KR20170015128A (en) * | 2015-07-31 | 2017-02-08 | 한양대학교 에리카산학협력단 | Multi-layer ceramic/metal type gas sensor and manufacturing method of the same |
| US20170059538A1 (en) * | 2015-09-01 | 2017-03-02 | Hyundai Motor Company | Chemochromic nanoparticles, method for manufacturing the same, and hydrogen sensor comprising the same |
| CN105603713A (en) * | 2015-11-13 | 2016-05-25 | 大连民族大学 | Preparation method and applications of SnO2/ZnO nano composite fiber material with coaxial heterostructure |
| CN105486724A (en) * | 2015-11-20 | 2016-04-13 | 吉林大学 | NO2 sensor based on precious metal Ag-supported mesoporous WO3 material and preparation method thereof |
| CN105388138A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨工业大学 | Optical measurement method based on tungsten oxide serving as ethyl alcohol gas sensing material |
| CN105606660A (en) * | 2015-12-24 | 2016-05-25 | 东北师范大学 | Gas-sensitive material for detecting NO2 and method for manufacturing gas-sensitive element made of gas-sensitive material |
| CN105628748A (en) * | 2015-12-24 | 2016-06-01 | 东北师范大学 | Platinum-loaded tin dioxide nanofiber gas-sensitive material and gas-sensitive element made from same |
| CN105738449A (en) * | 2016-01-13 | 2016-07-06 | 东北师范大学 | Stannic oxide-polyacid compound gas sensing material and preparation method thereof |
| CN105784789A (en) * | 2016-05-25 | 2016-07-20 | 吉林大学 | NH3 sensor of mesoporous WO3 material based on supported precious metal Pt and preparation method of NH3 sensor |
| CN107315036A (en) * | 2017-08-06 | 2017-11-03 | 潘金文 | One kind is based on SnO2The alcohol gas sensor of composite nano fiber |
| CN107827150A (en) * | 2017-12-14 | 2018-03-23 | 上海交通大学 | A kind of nickel doped tin oxide nano material, formaldehyde gas sensor and preparation method |
| CN108205002A (en) * | 2017-12-19 | 2018-06-26 | 太原理工大学 | A kind of high gas response and the LaFeO of selectivity3Base alcohol gas sensor element and preparation method thereof |
| CN108593711A (en) * | 2018-02-05 | 2018-09-28 | 广东为邦消防检测有限公司 | A kind of high-precision gas detector |
| CN108760629A (en) * | 2018-05-22 | 2018-11-06 | 青海大学 | A kind of preparation method and applications of multi-metal oxygen cluster functionalization cadmium sulfide nano wires sensor array |
| US20200088668A1 (en) * | 2018-09-17 | 2020-03-19 | Massachusetts Institute Of Technology | Switchable single-walled carbon nanotube-polymer composites for co2 sensing |
| JP2020056643A (en) * | 2018-10-01 | 2020-04-09 | 国立大学法人九州大学 | Gas sensor member, gas sensor, and gas sensor member manufacturing method |
| US20200225185A1 (en) * | 2019-01-15 | 2020-07-16 | Korea Advanced Institute Of Science And Technology | Sensor including nanostructures and method for manufacturing the same |
| CN109970108A (en) * | 2019-04-15 | 2019-07-05 | 青岛大学 | A kind of gas sensor and preparation method thereof based on nanometer nickel sulfide composite material |
| CN110044973A (en) * | 2019-05-05 | 2019-07-23 | 吉林大学 | Plane formula room temperature ammonia gas sensor and preparation method thereof based on the organic sensitive thin film of TPA-DCPP |
| US20200362128A1 (en) * | 2019-05-14 | 2020-11-19 | National Tsinghua University | Method of fabricating patterned cellulose nanocrystal composite nanofibers and nano thin films and their applications |
| CN112226702A (en) * | 2020-08-17 | 2021-01-15 | 蓬莱市超硬复合材料有限公司 | Tungsten oxide alloy material and preparation method thereof |
| CN112225926A (en) * | 2020-09-25 | 2021-01-15 | 山东大学 | Covalent organic material film and preparation method and application thereof |
| CN112578007A (en) * | 2020-12-02 | 2021-03-30 | 长春理工大学 | Indium oxide-polyacid composite gas sensing material and preparation method thereof |
Non-Patent Citations (8)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314652A (en) * | 2021-12-21 | 2022-04-12 | 长春理工大学 | Titanium dioxide/polyacid/ferric oxide three-layer coaxial nanobelt gas sensing material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113406155B (en) | 2022-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | Effects of Al doping on SnO2 nanofibers in hydrogen sensor | |
| CN109970108B (en) | Gas sensor based on nickel sulfide nano composite material and preparation method thereof | |
| KR101671405B1 (en) | Metal/oxide core-shell structure nanoparticle mixed sensing materials for semiconductor gas sensor | |
| Fan et al. | Carbon nanotubes-CuO/SnO2 based gas sensor for detecting H2S in low concentration | |
| CN109946358A (en) | One kind is with MTiO3Electric potential type SO is blended together for the YSZ base of sensitive electrode2Sensor, preparation method and applications | |
| CN113406155B (en) | Tin oxide/polyacid/tungsten oxide three-layer coaxial nanofiber gas sensing material and preparation method thereof | |
| CN110082406A (en) | One kind being based on SnO2-Co3O4The dimethylbenzene gas sensor and preparation method thereof of hetero-junctions nanostructure sensitive material | |
| CN109835944A (en) | Three-dimensional In for formaldehyde gas detection2O3/SnO2Core-shell nano composite material and gas sensor prepared therefrom | |
| JPH06507013A (en) | tin oxide gas sensor | |
| CN109839408B (en) | Ammonia gas sensor with nano composite material as sensing film | |
| CN105929005A (en) | Mixed-potential low-ppm acetone sensor based on YSZ and MNb2O6 sensitive electrode, and preparation method and application thereof | |
| Jiao et al. | Fabrication and investigation of a new all-inorganic lead free perovskite Cs3Bi2I6 Br3 for ammonia detection at room temperature | |
| CN110823965A (en) | Room temperature detection NO2Gas sensitive material and preparation method thereof | |
| KR20180015369A (en) | Highly reliable complex for detecting gas having independence againt humidity, method for preparing the complex, gas sensor comprising the complex, and method for preparing the gas sensor | |
| CN108508062A (en) | One kind being based on MoO3The triethylamine sensor of nano sensitive material, preparation method and applications | |
| CN113960122B (en) | Three-dimensional SnO2/Co3O4Core-shell nanocomposite and moisture-resistant acetone gas sensor prepared from same | |
| CN108593711A (en) | A kind of high-precision gas detector | |
| Husain et al. | Polypyrrole nanocomposites as promising gas/vapour sensing materials: Past, present and future prospects | |
| CN113552181A (en) | With NiO/NiFe2O4Triethylamine sensor using composite nanofiber as sensitive material and preparation method thereof | |
| Li et al. | Fabrication and characterization of a low power consumption ethanol gas sensor based on a suspended micro-hotplate | |
| Wei et al. | Formaldehyde sensing properties of ZnO-based hollow nanofibers | |
| CN109596676A (en) | Based on CexMn1-xO2-SnO2The gas sensor of material and its preparation and application | |
| CN112777586B (en) | Preparation and application of sensing film for ammonia sensor | |
| Manjula et al. | One step construction of crystal rod like Bi2O3/ZnO nanocomposite for voltammetry determination of isoprenaline in pharmaceutical and urine sample | |
| CN110082397A (en) | Cobaltosic oxide oxide semiconductor dimethylbenzene sensor and the preparation method and application 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220805 |