CN104198540A - Gas sensitive material for detecting low-concentration acetaldehyde - Google Patents
Gas sensitive material for detecting low-concentration acetaldehyde Download PDFInfo
- Publication number
- CN104198540A CN104198540A CN201410478950.5A CN201410478950A CN104198540A CN 104198540 A CN104198540 A CN 104198540A CN 201410478950 A CN201410478950 A CN 201410478950A CN 104198540 A CN104198540 A CN 104198540A
- Authority
- CN
- China
- Prior art keywords
- acetaldehyde
- gas sensitive
- sensitive material
- sensitivity
- sno2
- 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
- 239000000463 material Substances 0.000 title claims abstract description 27
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 title abstract description 54
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910021389 graphene Inorganic materials 0.000 claims description 7
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 23
- 230000035945 sensitivity Effects 0.000 abstract description 16
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 239000002904 solvent Substances 0.000 abstract description 4
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 abstract 3
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 abstract 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 238000003756 stirring Methods 0.000 description 13
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- 238000001132 ultrasonic dispersion Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 241000370738 Chlorion Species 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 150000001299 aldehydes Chemical class 0.000 description 2
- DAMJCWMGELCIMI-UHFFFAOYSA-N benzyl n-(2-oxopyrrolidin-3-yl)carbamate Chemical compound C=1C=CC=CC=1COC(=O)NC1CCNC1=O DAMJCWMGELCIMI-UHFFFAOYSA-N 0.000 description 2
- 235000014121 butter Nutrition 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
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 206010019233 Headaches Diseases 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 206010062717 Increased upper airway secretion Diseases 0.000 description 1
- 208000010476 Respiratory Paralysis Diseases 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 208000026435 phlegm Diseases 0.000 description 1
- 238000003822 preparative gas chromatography Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 description 1
- -1 with small brushes Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention discloses a novel gas sensitive material for detecting the high sensitivity of acetaldehyde gas and belongs to the technical field of gas sensitive materials. The novel gas sensitive material takes SnO2 as a basic material and is characterized in that Sb2O3 and grapheme are mixed in the SnO2 through a solvent thermal reaction method (ethanol is taken as a solvent), wherein the molar ratio of the SnO2 to the Sb2O3 ranges from 8 to 10, and the amount of the mixed grapheme is 0.08-1.0 percent of the sum of the mass of the SnO2 and the Sb2O3. The novel gas sensitive material has the benefits that the sensitivity of an indirectly heated type gas sensitive sensor made of the gas sensitive material to the acetaldehyde of 0.1 ppm (ratio of element resistance in air to element resistance in measured gas) at a working temperature of 25 DEG C ranges from 1.3 to 1.5, and the sensitivity to the acetaldehyde of 1000 mmp ranges from 60 and 70.
Description
Technical field
The invention belongs to gas sensitive, this material is used for making gas sensor, and the gas sensor of making has high sensitivity and better selectivity to low concentration acetaldehyde in air.
Technical background
The general toxicity main manifestations of acetaldehyde is the direct spread effect to skin, eyes and upper respiratory tract mucosa, and phlegm is increased, and bloodshot eyes redness, causes allergy, headache etc.Suck the acetaldehyde of high concentration and can cause and suffocate, even respiratory paralysis and death.Acetaldehyde can form adduct with DNA covalent bond, causes DNA interchain linkage and DNA break etc., and acetaldehyde also affects embryo's growth.Along with the enhancing of growth in the living standard and health consciousness, people more and more pay close attention to the existence of acetaldehyde.Accurately detect acetaldehyde in air, be of great significance for protection health.
At present the method for acetaldehyde is mainly vapor-phase chromatography, spectrophotometric method, high performance liquid chromatography and chemoluminescence method etc. in sensing chamber or in workshop air, and these methods need the instrument of more complicated, costliness.Metal Oxide Semiconductor Gas Sensing sensor due to cheap, be easy to make, can realize online detection and in widespread attention.(the Journal of The Electrochemical Society such as Yasuhiro Shimizu, 146 (3) 1222-1226 (1999)) in tin ash, mix 0.1wt%Rh, the sensitivity (in air in component resistance and tested gas component resistance ratio) that material is made element sensitivity to 40ppm acetaldehyde under 350 DEG C of working temperatures reaches 2 times.Jae-Mok Jun etc. (Bull.Korean Chem.Soc.32 (6) 1865-1872 (2011)) mix 5wt%SnO2 and 1wt%Ru in WO3, and to 100ppm acetaldehyde, sensitivity reaches 10 under 300 DEG C of working temperatures to make thick film element.The metal-oxide semiconductor (MOS) acetaldehyde sensitive material of bibliographical information and working temperature and the detection limit of sensor are higher at present.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of gas sensitive material for detection of acetaldehyde concentration in air, to improving detectability, the working temperature that reduce sensor and the minimum detectability to acetaldehyde of aldehydes gas sensor to low concentration acetaldehyde.
Gas sensitive of the present invention is with SnO
2for base-material, by solvent thermal reaction method (ethanol is made solvent) at SnO
2in mix Sb
2o
3and Graphene, wherein SnO
2with Sb
2o
3mol ratio be between 8-10, graphene-doped amount is SnO
2and Sb
2o
3the 0.08-1.0% of quality sum.
This material is prepared with solvent-thermal method, according to certain mol proportion by butter of tin, antimony trichloride is dissolved in ethanol, a certain amount of Graphene is joined in above-mentioned mixed solution, ultrasonic dispersion 1 hour, then dropwise add while stirring NaOH ethanolic solution, the molal quantity of NaOH equals the butter of tin molal quantity of 4 times and the antimony trichloride molal quantity sum of 3 times, potpourri is transferred in the autoclave with teflon, at 100-140 DEG C of insulation 8-24 hour, allow reactor naturally cool to room temperature, product is filtered, wash to filtrate and can't check chlorion with deionized water and ethanol, 60 DEG C of vacuum drying, obtain gas sensitive.
Material of the present invention can be used as the sensitive material of aldehydes gas sensitive element, the method of utilizing this material to make heater-type gas sensor is: 0.1 gram of material and 0.5 gram of terpinol mixed grinding are made to slurry, with small brushes, slurry is coated onto to the surface of alumina ceramic tube; The size of alumina ceramic tube is: long 6 millimeters, and 1.6 millimeters of internal diameters, 2 millimeters of external diameters, make electrode at alumina tube two ends with gold medal, are welded with spun gold as lead-in wire on electrode, and between electrode, distance is 1 millimeter; In alumina tube, place nichrome wire as heater strip, flow through the electric current of heater strip and heater strip both end voltage and can control the temperature of alumina tube surface-sensitive material by control; The alumina tube that scribbles sensitive material slurry is placed under infrared lamp and is dried, obtain heater-type gas sensor.Element is under working temperature to the sensitivity of certain gas, the ratio of element resistance and element resistance in tested gas in air.Element reaches 0.1ppm to the minimum detectability of acetaldehyde, and to the sensitivity of indoor common dusty gas 1000ppm acetaldehyde, 1000ppm ammonia, 1000ppm benzene all lower than 3.
Embodiment
The high sensitivity to acetaldehyde, low detection limit and good selectivity with specific embodiment illustrative material below.
Embodiment 1
The Graphene alcohol suspension that is 1mg/ml by 0.75ml concentration joins ultrasonic dispersion in 30ml ethanol and after 1 hour, adds 1ml concentrated hydrochloric acid to stir, and adds respectively 0.0005mol SbCl
3with 0.0045mol SnCl
4after stirring and dissolving, continue ultrasonic dispersion 1 hour, dropwise adding while stirring 10ml concentration is the ethanolic solution of the NaOH of 1.95mol/L, stir after 10 minutes, it is in the autoclave of 50ml with teflon that potpourri is transferred to volume, 100 DEG C of insulations 10 hours, allow reactor naturally cool to room temperature, product is filtered, washs to filtrate and can't check chlorion with deionized water and ethanol, 60 DEG C of vacuum drying, (in material, the mol ratio of Sn/Sb is 9, and graphene-doped amount is SnO to obtain gas sensitive
2and Sb
2o
3quality sum 0.1%).
Material is made to heater-type element, record element, under 20 DEG C of working temperatures, the sensitivity of 0.1ppm, 1ppm, 10ppm, 100ppm, 1000ppm acetaldehyde is respectively to 1.4,2.0,5.1,10,65.And under identical working temperature, the sensitivity of the acetaldehyde to 1000ppm and 100ppm benzene only has 1.3 and 1.9.Acetaldehyde response time and release time to 0.1-1000pp are all no more than 30 seconds.
Embodiment 2
The Graphene alcohol suspension that is 1mg/ml by 0.55ml concentration joins ultrasonic dispersion in 30ml ethanol and after 1 hour, adds 1ml concentrated hydrochloric acid to stir, and adds respectively 0.0005mol SbCl
3with 0.004mol SnCl
4after stirring and dissolving, continue ultrasonic dispersion 1 hour, dropwise adding while stirring 10ml concentration is the ethanolic solution of the NaOH of 1.75mol/L, stir after 10 minutes, it is in the autoclave of 50ml with teflon that potpourri is transferred to volume, 120 DEG C of insulations 16 hours, allow reactor naturally cool to room temperature, product is filtered, washs to filtrate and can't check chlorion with deionized water and ethanol, 60 DEG C of vacuum drying, (in material, the mol ratio of Sn/Sb is 8, and graphene-doped amount is SnO to obtain gas sensitive
2and Sb
2o
3quality sum 0.08%).
Material is made to heater-type element, record element, under 20 DEG C of working temperatures, the sensitivity of 0.1ppm, 1ppm, 10ppm, 100ppm, 1000ppm acetaldehyde is respectively to 1.3,1.9,5.0,9.0,60.And under identical working temperature, the sensitivity of the acetaldehyde to 1000ppm and 100ppm benzene only has 1.2 and 1.8.Acetaldehyde response time and release time to 0.1-1000pp are all no more than 35 seconds.
Embodiment 3
The Graphene alcohol suspension that is 1mg/ml by 8.3ml concentration joins ultrasonic dispersion in 22ml ethanol and after 1 hour, adds 1ml concentrated hydrochloric acid to stir, and adds respectively 0.0005mol SbCl
3with 0.005mol SnCl
4after stirring and dissolving, continue ultrasonic dispersion 1 hour, dropwise adding while stirring 10ml concentration is the ethanolic solution of the NaOH of 2.15mol/L, stir after 10 minutes, it is in the autoclave of 50ml with teflon that potpourri is transferred to volume, 140 DEG C of insulations 24 hours, allow reactor naturally cool to room temperature, product is filtered, washs to filtrate and can't check chlorion with deionized water and ethanol, 60 DEG C of vacuum drying, (in material, the mol ratio of Sn/Sb is 10, and graphene-doped amount is SnO to obtain gas sensitive
2and Sb
2o
3quality sum 1%).
Material is made to heater-type element, record element, under 20 DEG C of working temperatures, the sensitivity of 0.1ppm, 1ppm, 10ppm, 100ppm, 1000ppm acetaldehyde is respectively to 1.5,2.2,5.8,11,70.And under identical working temperature, the sensitivity of the acetaldehyde to 1000ppm and 100ppm benzene only has 1.4 and 2.0.Acetaldehyde response time and release time to 0.1-1000pp are all no more than 40 seconds.
Claims (1)
1. for detection of a gas sensitive for low concentration acetaldehyde, it is characterized in that, this material is at SnO
2middle doping Sb
2o
3with the compound substance of Graphene, wherein: the mol ratio of Sn and Sb is 8~10, the quality of Graphene is SnO
2and Sb
2o
30.08~1.0% of quality sum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410478950.5A CN104198540B (en) | 2014-09-18 | 2014-09-18 | A kind of gas sensitive for detecting low concentration acetaldehyde |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410478950.5A CN104198540B (en) | 2014-09-18 | 2014-09-18 | A kind of gas sensitive for detecting low concentration acetaldehyde |
Publications (2)
Publication Number | Publication Date |
---|---|
CN104198540A true CN104198540A (en) | 2014-12-10 |
CN104198540B CN104198540B (en) | 2016-08-24 |
Family
ID=52083865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201410478950.5A Expired - Fee Related CN104198540B (en) | 2014-09-18 | 2014-09-18 | A kind of gas sensitive for detecting low concentration acetaldehyde |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN104198540B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106053549A (en) * | 2016-05-30 | 2016-10-26 | 安徽工业大学 | Gas sensitive material for detecting low-concentration acetone |
CN108593718A (en) * | 2018-05-22 | 2018-09-28 | 广东美的制冷设备有限公司 | Gas sensor sensitive material and preparation method thereof |
CN109716118A (en) * | 2016-11-02 | 2019-05-03 | 韩国电力公社 | Acetylene gas analytical equipment and analysis method for buried cable |
CN110455889A (en) * | 2019-08-14 | 2019-11-15 | 吉林大学 | Based on YSZ and NiTiO3Sensitive electrode blendes together electric potential type acetaldehyde sensor and preparation method thereof |
CN113173602A (en) * | 2021-04-14 | 2021-07-27 | 扬州大学 | Preparation method of n-nonanal volatile gas sensitive material |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN85100030A (en) * | 1985-04-01 | 1986-06-10 | 天津大学 | Thin film SnO 2 gas-sensitive element and manufacture method thereof |
CN101140254A (en) * | 2007-10-16 | 2008-03-12 | 上海大学 | Method for enhancing air-sensitive performance of metal oxide semiconductor material |
CN103995088A (en) * | 2014-05-26 | 2014-08-20 | 太原理工大学 | Preparation method and application of graphene/tin oxide nano composite material |
-
2014
- 2014-09-18 CN CN201410478950.5A patent/CN104198540B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN85100030A (en) * | 1985-04-01 | 1986-06-10 | 天津大学 | Thin film SnO 2 gas-sensitive element and manufacture method thereof |
CN101140254A (en) * | 2007-10-16 | 2008-03-12 | 上海大学 | Method for enhancing air-sensitive performance of metal oxide semiconductor material |
CN103995088A (en) * | 2014-05-26 | 2014-08-20 | 太原理工大学 | Preparation method and application of graphene/tin oxide nano composite material |
Non-Patent Citations (1)
Title |
---|
高晓平等: "基于锑掺杂的高灵敏度纳米SnO2气体传感器", 《仪表技术与传感器》, 31 December 2009 (2009-12-31) * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106053549A (en) * | 2016-05-30 | 2016-10-26 | 安徽工业大学 | Gas sensitive material for detecting low-concentration acetone |
CN106053549B (en) * | 2016-05-30 | 2019-02-19 | 安徽工业大学 | It is a kind of for detecting the gas sensitive of low concentration acetone |
CN109716118A (en) * | 2016-11-02 | 2019-05-03 | 韩国电力公社 | Acetylene gas analytical equipment and analysis method for buried cable |
CN108593718A (en) * | 2018-05-22 | 2018-09-28 | 广东美的制冷设备有限公司 | Gas sensor sensitive material and preparation method thereof |
CN110455889A (en) * | 2019-08-14 | 2019-11-15 | 吉林大学 | Based on YSZ and NiTiO3Sensitive electrode blendes together electric potential type acetaldehyde sensor and preparation method thereof |
CN113173602A (en) * | 2021-04-14 | 2021-07-27 | 扬州大学 | Preparation method of n-nonanal volatile gas sensitive material |
CN113173602B (en) * | 2021-04-14 | 2023-10-13 | 扬州大学 | Preparation method of n-nonanal volatile gas sensitive material |
Also Published As
Publication number | Publication date |
---|---|
CN104198540B (en) | 2016-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104198540A (en) | Gas sensitive material for detecting low-concentration acetaldehyde | |
CN104211108B (en) | A kind of gas sensitive for detecting low concentration formaldehyde | |
CN112229879A (en) | TiO2-Ti3C2TxComposite film gas sensor and preparation method and application thereof | |
CN105092652B (en) | Photocatalysis formaldehyde sensing material of tin dope and preparation method thereof and formaldehyde sensor | |
CN109001266B (en) | Composite gas-sensitive material with high sensitivity and high selectivity to acetic acid gas | |
Fu | Research on gas-sensing properties of lead sulfide-based sensor for detection of NO2 and NH3 at room temperature | |
EP2845009B1 (en) | A sensor composition for acetone detection in breath | |
CN104297464A (en) | Making method and application of mycotoxin photoelectrochemical sensor for in situ generation of CdS | |
CN108918600B (en) | High-selectivity composite gas-sensitive material for detecting acetic acid gas in air | |
CN105911111A (en) | Preparation and application of In-Sn composite oxide semiconductor ethanol sensor | |
CN105181762A (en) | Co-Sn composite oxide ethyl alcohol sensor and preparation and application thereof | |
CN104569081A (en) | Ethanol gas sensor based on In2O3 microflower/SnO2 nanoparticle composite material and preparation method of sensor | |
CN109490376A (en) | A kind of graphene-ZnGa that PARA FORMALDEHYDE PRILLS(91,95) gas is highly selective2O4Composite air-sensitive material | |
CN102279212A (en) | Resistive moisture sensor capable of measuring humidity of low-humidity environment and manufacturing method thereof | |
CN105806899A (en) | Production and application of Pt-SnO2 oxide semiconductor carbon monoxide sensor | |
CN110040766A (en) | The gas-sensitive nano material and gas sensor of high moisture resistance | |
Wang et al. | Preparation and CO gas-sensing behavior of Au-doped SnO2 sensors | |
CN107817273A (en) | The preparation method of aluminium, Ti doped Zinc oxide-base acetone gas sensor | |
CN107817277A (en) | The preparation method of new high selectivity acetone gas sensor | |
CN116879353A (en) | Sensor, detection system and method for detecting microorganisms in real time and directly in gas phase | |
CN108918601A (en) | It is a kind of for detecting the tungsten oxide composite air-sensitive material of low concentration acetone gas | |
CN102953059B (en) | Manufacture method of acetone gas sensitive sensor based on titanium dioxide doped by zinc oxide | |
CN112986340B (en) | Thick film material for acetone gas sensitive element, preparation method and acetone gas sensitive element | |
CN111693585B (en) | Semiconductor nano biosensor and preparation method thereof | |
CN112362702B (en) | Composite gas-sensitive material with high gas-sensitive selectivity and low detection limit for toluene at room temperature |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
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: 20160824 |