CN105174299A - Preparation of CuO flakes and application of CuO flakes serving as gas sensitive materials - Google Patents
Preparation of CuO flakes and application of CuO flakes serving as gas sensitive materials Download PDFInfo
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- CN105174299A CN105174299A CN201510539839.7A CN201510539839A CN105174299A CN 105174299 A CN105174299 A CN 105174299A CN 201510539839 A CN201510539839 A CN 201510539839A CN 105174299 A CN105174299 A CN 105174299A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 title abstract description 17
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 24
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000035945 sensitivity Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000002105 nanoparticle Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 3
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 238000007669 thermal treatment Methods 0.000 claims description 10
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 5
- 238000000703 high-speed centrifugation Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 235000011837 pasties Nutrition 0.000 claims description 5
- 239000002957 persistent organic pollutant Substances 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 230000002000 scavenging effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 3
- 229960004756 ethanol Drugs 0.000 claims description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 239000011540 sensing material Substances 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 230000010718 Oxidation Activity Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 238000003795 desorption Methods 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 54
- 239000007789 gas Substances 0.000 description 40
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002341 toxic gas Substances 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 230000008821 health effect Effects 0.000 description 1
- 239000002055 nanoplate Substances 0.000 description 1
- 239000002135 nanosheet Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- -1 reach 58 Chemical compound 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
- C01G3/02—Oxides; Hydroxides
-
- 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
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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Abstract
The invention discloses a method for preparing CuO flakes and application of the CuO flakes in the field of gas sensors, and belongs to the technical field of inorganic semiconductor sensing material preparation. The method comprises the following steps: immersing a washed Cu foil in an oxalic acid solution having a specific concentration, allowing the solution to stand for a certain period, and collecting a blue-green precipitate; filtering, centrifuging, baking and heating the precipitate to obtain flakes which are interwoven and constructed by CuO nano-particles of 40-50nm and have a linearity of 4-5mu m and a thickness of about 200nm. The preparation method has the advantages of simplicity, controllability and low cost; the prepared CuO flakes have a unique surface structure, and can be used for improving the oxidation activity of a material by utilizing the catalytic property of the CuO flakes on volatile organic compounds (VOCs), so that the sensitivity of a sensor can be greatly improved. The CuO flakes are beneficial to transmission of VOCs gas molecules on the surface of the CuO flakes, can be used for promoting the response and recovery speed of a sensor due to the quick adsorption and desorption characteristics, and shows a good gas-sensitive characteristic on the VOCs. Compared with a gas sensor prepared from nano-structure CuO, the gas sensor prepared from the CuO flakes has the advantage that the gas-sensitivity is greatly improved.
Description
technical field:
The present invention relates to a kind of CuO preparation of sections and the application as gas sensitive material thereof, belong to inorganic semiconductor sensing material fabricating technology field.CuO thin slice detects VOCs gas (methyl alcohol, ethanol, Virahol, formaldehyde, propyl carbinol, acetone, toluene) as sensitive material, has the advantages such as highly sensitive, response resume speed is fast, can be used for rapid detection VOCs gas.
background technology:
Three classes are broadly divided into the indoor air pollutants that Human health effects is maximum: one is pellet: dust, smog, pollen etc., major effect human respiratory and Digestive tract; Two is microbiology class: bacterium, virus etc.; Three is organic and inorganic toxic gas pollutants.For one or two pollutants, people know control measures, and for hazardness and the source of the 3rd class and indoor toxic gas, people know few.The toxic and harmful constantly discharged in material of construction, finishing material and article of furniture indoor, is actually the primary pollution source of room air, wherein the toxic gas mainly volatile organic compounds (VOCs) such as formaldehyde, benzene and benzene homologues.Therefore, detect and monitor these toxic gases in time, to minimizing and Control pollution, mould pure and fresh, comfortable air ambient, protection HUMAN HEALTH all has very important meaning and function.
Have more high performance VOCS gas sensor to research and develop, researchist one constantly improves the sensitive property of gas sensor straight through the structure and composition of studying type material.The design of the nanostructure of gas sensitive becomes the important directions of development, comprises structure and the three-dimensional nanometer material such as material, two-dimensional nano sheet dish such as zero-dimension nano particle gas sensitive, one-dimensional nano line rod.Cupric oxide is a kind of current most widely used Semiconductor gas sensors material, can be applicable to measure part oxidizing gas and partial reductive gas.At present, find by prior art documents, Yang etc. have prepared three-dimensional flower-shaped structure C uO material, its to the gas such as ethanol, toluene under 1000ppm concentration sensitivity lower than 5(Sens.Actuators, B, 2015,207,177); Xia(RSCAdv., 2014,4,57975) and Su(Sci.Rep., 2014,4,5753) etc. prepared nano-plates CuO, its to VOCs gas under 190-1050ppm concentration sensitivity lower than 8; Cao etc. have prepared nanometer leaf CuO, its to alcohol gas under 1500ppm concentration sensitivity lower than 9(RSCAdv., 2015,5,34788).The present invention adopts CuO sheeting as gas sensitive material, for detecting VOCs gas, improving and improving the sensitivity characteristic to VOCs gas, there is not yet pertinent literature report and patent application.
summary of the invention:
The object of the present invention is to provide a kind of CuO preparation of sections method.Adopt simple method to prepare CuO sheeting, after heat treatment, to sample the CuO thin slice obtained interweaved by the CuO nano particle of 40 ~ 50nm size with being built into dimension 4 ~ 5 μm, and thickness is about the thin slice of 200nm.Experiment instrument is simple, simple to operate, with low cost.
In the present invention, the concrete preparation method of CuO thin slice has following steps:
(1) cleaning of Cu paper tinsel: high-purity Cu paper tinsel of thickness 0.1mm is put into acetone scavenging solution ultrasonic cleaning 30 minutes after sand papering, removes surperficial organic pollutant; Put into dehydrated alcohol, the ultrasonic cleaning of deionized water difference 20 minutes after deionized water rinsing more successively, wash ion and the organic impurities on surface, dry for standby;
(2) the Cu paper tinsel that step (1) obtains is cut into dice, being immersed in concentration is in the oxalic acid solution of 0.25 ~ 0.75mol/L, sealing placement 18 ~ 22 days, occurs a large amount of blue-greenish colour throw out on Cu paper tinsel surface;
(3) step (2) gained blue-greenish colour throw out collected, filter, high speed centrifugation deionized water wash, the product obtained at high temperature is dried, then is placed in retort furnace and heat-treats.
This CuO sheeting is another object of the present invention is to be applied in the survey to VOCs gas.
Get CuO sheeting and the deionized water uniform pasty state of 2:5 furnishing in mass ratio, be applied to the vitrified pipe outside surface of band Pt lead-in wire, 120
oc dries 12h, obtains the vitrified pipe gas sensor with even gas sensitive thick film, in retort furnace 325
oc thermal treatment 1h, element to be welded on base and to be placed on special agingtable, aging 120 hours of logical 5.0V volts DS, under the test condition of operating voltage 5.0V, uses WS-30A air-sensitive tester measuring element in working temperature 160 DEG C of sensitivity to VOCs gas.Result shows, and prepared material can realize, to effective detection of VOC gas, having larger application prospect.
accompanying drawing illustrates:
The X-ray diffractogram of the CuO thin slice of Fig. 1 prepared by embodiment one, show the characteristic diffraction peak peak position of pure CuO and standard card (JCPDS48-1548) completely the same, inclusion-free peak occurs, and peak type is sharp-pointed, shows that crystal structure degree is fine.
The electron scanning micrograph figure of the CuO thin slice of Fig. 2 prepared by embodiment one, as seen from the figure, product morphology is surperficial bossed flake.
Electromicroscopic photograph figure is penetrated in the transmission of the CuO thin slice of Fig. 3 prepared by embodiment one, and as seen from the figure, thin slice is interweaved by the CuO nano particle of 40 ~ 50nm size with being built into dimension 4 ~ 5 μm, and thickness is about the thin slice of 200nm.
The CuO thin slice of Fig. 4 prepared by embodiment one is to the sensitivity of VOC gas and response, recovery characteristics, as seen from the figure, under 500ppm gas concentration, sensor has the highest sensitivity to propyl carbinol, reach 58, toluene is minimum is 3.6, and the highly sensitive nano-sized CuO in reporting at present is to the sensitivity of VOCs gas.
The electron scanning micrograph figure of the CuO thin slice of Fig. 5 prepared by embodiment two, as seen from the figure, product morphology is surperficial bossed flake.
As seen from the figure, to the transmission electron microscope photo figure of the CuO thin slice of Fig. 6 prepared by embodiment two thin slice interweaved by the CuO nano particle of 40 ~ 50nm size with being built into dimension 4 ~ 5 μm, and thickness is about the thin slice of 200nm.
The electron scanning micrograph figure of the CuO thin slice of Fig. 7 prepared by embodiment three, as seen from the figure, product morphology is surperficial bossed flake.
As seen from the figure, to the transmission electron microscope photo figure of the CuO thin slice of Fig. 8 prepared by embodiment three thin slice interweaved by the CuO nano particle of 40 ~ 50nm size with being built into dimension 4 ~ 5 μm, and thickness is about the thin slice of 200nm.
embodiment:
The present invention is raw materials used all adopts commercially available raw material and chemically pure reagent, and below in conjunction with specific embodiment, the present invention is further detailed explanation.
embodiment one:
(1) cleaning of Cu paper tinsel: high-purity Cu paper tinsel of thickness 0.1mm is put into acetone scavenging solution ultrasonic cleaning 30 minutes after sand papering, removes surperficial organic pollutant; Put into dehydrated alcohol, the ultrasonic cleaning of deionized water difference 20 minutes after deionized water rinsing more successively, wash ion and the organic impurities on surface, dry for standby;
(2) the Cu paper tinsel that step (1) obtains is cut into dice, being immersed in concentration is in the oxalic acid solution of 0.5mol/L, and sealing placement 20 days, obtains a large amount of blue-greenish colour throw out;
(3) by the collection of step (2) gained blue-greenish colour throw out, filtration, high speed centrifugation deionized water wash, the product obtained is 80
o12h is dried under C;
(4) step (3) products therefrom is placed in retort furnace and heat-treats, thermal treatment temp is 350
oc, heat treatment time is 1h;
(5) get step (4) resulting materials and the deionized water uniform pasty state of 2:5 furnishing in mass ratio, be applied to the vitrified pipe outside surface of band Pt lead-in wire, 120
oc dries 12h, obtains the vitrified pipe gas sensor with even gas sensitive thick film, in retort furnace 325
oc thermal treatment 1h, element to be welded on base and to be placed on special agingtable, aging 120 hours of logical 5.0V volts DS, under the test condition of operating voltage 5.0V, use WS-30A air-sensitive tester measuring element in working temperature 160 DEG C of sensitivity to VOCs gas, the sensitivity of definition gas sensor
β=
r g/
r a, wherein
r gwith
r abe respectively the resistance value of sensor element in VOCs gas and dry air.
embodiment two:
(1) cleaning of Cu paper tinsel: high-purity Cu paper tinsel of thickness 0.1mm is put into acetone scavenging solution ultrasonic cleaning 30 minutes after sand papering, removes surperficial organic pollutant; Put into dehydrated alcohol, the ultrasonic cleaning of deionized water difference 20 minutes after deionized water rinsing more successively, wash ion and the organic impurities on surface, dry for standby;
(2) the Cu paper tinsel that step (1) obtains is cut into dice, being immersed in concentration is in the oxalic acid solution of 0.75mol/L, and sealing placement 18 days, obtains a large amount of blue-greenish colour throw out;
(3) by the collection of step (2) gained blue-greenish colour throw out, filtration, high speed centrifugation deionized water wash, the product obtained is 70
o15h is dried under C;
(4) step (3) products therefrom is placed in retort furnace and heat-treats, thermal treatment temp is 375
oc, heat treatment time is 0.5h;
(5) get step (4) resulting materials and the deionized water uniform pasty state of 2:5 furnishing in mass ratio, be applied to the vitrified pipe outside surface of band Pt lead-in wire, 120
oc dries 12h, obtains the vitrified pipe gas sensor with even gas sensitive thick film, in retort furnace 325
oc thermal treatment 1h, element to be welded on base and to be placed on special agingtable, aging 120 hours of logical 5.0V volts DS, under the test condition of operating voltage 5.0V, use WS-30A air-sensitive tester measuring element in working temperature 160 DEG C of sensitivity to VOCs gas, the sensitivity of definition gas sensor
β=
r g/
r a, wherein
r gwith
r abe respectively the resistance value of sensor element in VOCs gas and dry air.
embodiment three:
(1) cleaning of Cu paper tinsel: high-purity Cu paper tinsel of thickness 0.1mm is put into acetone scavenging solution ultrasonic cleaning 30 minutes after sand papering, removes surperficial organic pollutant; Put into dehydrated alcohol, the ultrasonic cleaning of deionized water difference 20 minutes after deionized water rinsing more successively, wash ion and the organic impurities on surface, dry for standby;
(2) the Cu paper tinsel that step (1) obtains is cut into dice, being immersed in concentration is in the oxalic acid solution of 0.25mol/L, and sealing placement 22 days, obtains a large amount of blue-greenish colour throw out;
(3) by the collection of step (2) gained blue-greenish colour throw out, filtration, high speed centrifugation deionized water wash, the product obtained is 90
o10h is dried under C;
(4) step (3) products therefrom is placed in retort furnace and heat-treats, thermal treatment temp is 325
oc, heat treatment time is 1.5h;
(5) get step (4) resulting materials and the deionized water uniform pasty state of 2:5 furnishing in mass ratio, be applied to the vitrified pipe outside surface of band Pt lead-in wire, 120
oc dries 12h, obtains the vitrified pipe gas sensor with even gas sensitive thick film, in retort furnace 325
oc thermal treatment 1h, element to be welded on base and to be placed on special agingtable, aging 120 hours of logical 5.0V volts DS, under the test condition of operating voltage 5.0V, use WS-30A air-sensitive tester measuring element in working temperature 160 DEG C of sensitivity to VOCs gas, the sensitivity of definition gas sensor
β=
r g/
r a, wherein
r gwith
r abe respectively the resistance value of sensor element in VOCs gas and dry air.
Claims (8)
1. a CuO preparation of sections method, is characterized in that having following preparation process and step:
(1) cleaning of Cu paper tinsel: high-purity Cu paper tinsel of thickness 0.1mm is first used sand papering, then puts into acetone scavenging solution ultrasonic cleaning 30 minutes, remove surperficial organic pollutant; Put into dehydrated alcohol, the ultrasonic cleaning of deionized water difference 20 minutes after deionized water rinsing more successively, wash ion and the organic impurities on surface, dry for standby;
(2) the Cu paper tinsel that step (1) obtains is cut into dice, being immersed in concentration is in the oxalic acid solution of 0.25 ~ 0.75mol/L, and a large amount of blue-greenish colour throw out, appears in sealing placement 18 ~ 22 days;
(3) step (2) gained blue-greenish colour throw out collected, filter, high speed centrifugation deionized water wash, the product obtained at high temperature is dried, then is placed in retort furnace and heat-treats.
2. a kind of CuO preparation of sections method according to claim 1, is characterized in that, the temperature that in described step (3), product is dried is 70 ~ 90
oc, the time is 10 ~ 15h.
3. a kind of CuO preparation of sections method according to claim 1, is characterized in that, in described step (3), product is in retort furnace during thermal treatment, and thermal treatment temp is 325 ~ 375
oc, heat treatment time is 0.5 ~ 1.5h.
4. a kind of CuO preparation of sections method according to claim 1, is characterized in that, after the product annealing of described step (3), the CuO thin slice obtained is interweaved by the CuO nano particle of 40 ~ 50nm size with being built into dimension 4 ~ 5 μm, and thickness is about the thin slice of 200nm.
5. a gas sensor, it contains CuO sheeting according to claim 4.
6. gas sensor according to claim 5, is characterized in that: get CuO sheeting and the deionized water uniform pasty state of 2:5 furnishing in mass ratio, is applied to the vitrified pipe outside surface of band Pt lead-in wire, 120
oc dries 12h, obtains the vitrified pipe gas sensor with even gas sensitive thick film, in retort furnace 325
oc thermal treatment 1h, to be welded on element on base and to be placed in and agingly on special agingtable obtain gas sensor.
7. the gas sensor described in claim 5 or 6, at detection VOCs gas, comprises the application in methyl alcohol, ethanol, Virahol, formaldehyde, propyl carbinol, acetone, toluene.
8. application according to claim 7, described detection refers to and uses WS-30A air-sensitive tester measuring element in working temperature 160 DEG C of sensitivity to VOCs gas and response, time of recovery.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806893A (en) * | 2016-06-02 | 2016-07-27 | 四川大学 | High-sensitivity formaldehyde gas sensor and production method thereof |
| CN106976903A (en) * | 2017-02-28 | 2017-07-25 | 沈阳化工大学 | A kind of flower-shaped CuO method for preparing microsphere and its in formaldehyde gas sensor application |
| CN107884446A (en) * | 2017-11-07 | 2018-04-06 | 钟永松 | A kind of alcohol gas sensor based on multi-element metal oxide sensitive material |
| CN107884445A (en) * | 2017-11-07 | 2018-04-06 | 潘柏霖 | A kind of safety monitoring system for vehicle |
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| CN106976903B (en) * | 2017-02-28 | 2019-03-15 | 沈阳化工大学 | A kind of flower-shaped CuO method for preparing microsphere and its in formaldehyde gas sensor application |
| CN107884446A (en) * | 2017-11-07 | 2018-04-06 | 钟永松 | A kind of alcohol gas sensor based on multi-element metal oxide sensitive material |
| CN107884445A (en) * | 2017-11-07 | 2018-04-06 | 潘柏霖 | A kind of safety monitoring system for vehicle |
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