CN102495104A - Neuron harmful gas sensor based on Y-type zeolite material with zinc oxide (ZnO) surface coating - Google Patents
Neuron harmful gas sensor based on Y-type zeolite material with zinc oxide (ZnO) surface coating Download PDFInfo
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- CN102495104A CN102495104A CN2011104136204A CN201110413620A CN102495104A CN 102495104 A CN102495104 A CN 102495104A CN 2011104136204 A CN2011104136204 A CN 2011104136204A CN 201110413620 A CN201110413620 A CN 201110413620A CN 102495104 A CN102495104 A CN 102495104A
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Abstract
A neuron harmful gas sensor based on a Y-type zeolite material with a zinc oxide (ZnO) surface coating belongs to the technical field of electronic gas sensitive devices and is characterized by consisting of the Y-type zeolite material with the ZnO surface coating and interdigital gold electrodes. Zn (No3) 2 and Y-type zeolite are dissolved in ethanol according to mass ratio of 3 to 7; after being heated to 80 DEG C and stirred, the zeolite is volatilized to be depleted; deposited powder is taken out to be roasted at the temperature of 550 DEG C; the zeolite powder of the ZnO coating is obtained and pressed into a thick film under the pressure of 5,000 tons; and the gas sensitive material of the sensor is obtained. The silk-screen printing technique is then adopted to print the interdigital gold electrodes on the surface of the thick film, and the final sensor is obtained. The sensor is operated within the operating temperature range of 250 DEG C to 350 DEG C and with signals under the frequency of 3,000 Hz, and impedance of the sensor in flowing air and neuron harmful gas changes. The neuron harmful gas sensor based on the Y-type zeolite material with the ZnO surface coating has the advantages of showing better signal recovery performance.
Description
Technical field
The invention belongs to electron gas sensing device technical field, relate to a kind of neuron harmful gas sensor of the y-type zeolite material based on the ZnO surface coating.
Background technology
Zeolitic material is a kind of important industrial materials, is widely used in Industrial Catalysis, in molecular sieve and the chemical sensor.In the sensor of chemical gas application facet, the work in early stage mainly is to utilize its catalytic performance to improve the Selectivity of Sensor ability.Up to date, people's electrical property exploitation gas sensor of just beginning one's study and directly utilizing its ionic conduction.The basic structure of its sensor is at Si substrate or Al with platinum or golden interdigital electrode
2O
3On the substrate, utilize the thick film of screen printing technique deposition ZSM5 type zeolitic material.The sensor of exploitation is mainly used in the detection of ammonia and hydrocarbon.Professor Huang Yiping of domestic Shanghai Communications University has also attempted utilizing the method for inkjet printing; The zeolite thick film of 13X type is coated on the Si substrate with interdigital electrode; Prepared sensor shows certain simulation reagent methyl-phosphoric acid dimethyl ester (DMMP) sensitivity to the neuron harmful gas under the low frequency that is applied; But it selects poor-performing; Return its reason to be under the lower frequency, its induced signal is mainly derived from the interface between metal electrode and 13X sensitive material, so do not make full use of this unique texture of zeolite micropore.People such as the Li of Ohio State Univ-Columbus USA and Dutta are pressed into block with y-type zeolite, and prepared sensor is worked under the frequency of 3000Hz, find sensor sheet reveal good to DMMP sensitivity and to the being selected in property of multiple common gas.But the first time of sensor, there was not exclusively reversible problem in the induced signal to harmful gas, was unfavorable for practical application.
Summary of the invention
The neuron harmful gas sensor that the purpose of this invention is to provide a kind of y-type zeolite material based on the ZnO surface coating.The technical matters that the present invention will solve is the y-type zeolite gas sensitive of preparation ZnO surface coating, utilizes to have the gas sensitive of the y-type zeolite of ZnO surface coating as sensor, solves the problem that sensor responds incomplete recovery for the first time.
Technical scheme of the present invention is that sensor is made up of y-type zeolite gas sensitive with ZnO surface coating and golden interdigital electrode.At first prepare gas sensitive, with Zn (NO
3)
2Be dissolved in ethanolic solution with the y-type zeolite particle according to 3: 7 ratio of mass ratio; Be heated to 80 ℃; Fully stir after 24 hours, with the ethanol volatilization totally, get the white powder that deposits 550 ℃ of following roastings 2 hours; Obtain ZnO and be coated in the y-type zeolite powder, utilize pressing machine under 5000 tons pressure, to become thick film to obtain the gas sensitive of sensor powder compacting then.At last, utilize screen printing technique on the zeolite membrane surface of above-mentioned acquisition, to print the golden interdigital electrode shown in accompanying drawing 1, obtain final y-type zeolite gas sensor based on the ZnO surface-coated.
Effect of the present invention and benefit are; With respect to the pure y-type zeolite material sensors of report, show better restorability to the response signal of the simulation reagent methyl-phosphoric acid dimethyl ester of neuron harmful gas based on the y-type zeolite material sensors of ZnO surface coating.
Description of drawings
Accompanying drawing 1 is golden interdigital electrode synoptic diagram.
Among the figure: A 0.1-0.2mm; B 0.1-0.2mm.
Accompanying drawing 2 be sensor in the time of 320 ℃, fixed frequency is under 3000Hz, to the response signal of about 100ppm DMMP curve map over time.
Among the figure: the impedance variations curve of 1 sensor in moving air; 2 sensors are air in background, the impedance variations curve in about 100ppm DMMP concentration atmosphere; 3 sensors are air in background, the impedance variations curve in about 100ppm DMMP concentration atmosphere.
Embodiment
Be described in detail specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
The y-type zeolite particle surface of preparation ZnO surface coating.At first with Zn (NO
3)
2Be dissolved in ethanolic solution with the y-type zeolite particle according to 3: 7 ratio of mass ratio, be heated to 80 ℃, fully stir 24 hours after, with ethanol volatilization totally, get the white powder that deposits 550 ℃ of following roastings 2 hours, obtain the y-type zeolite powder of ZnO surface coating.
The preparation sensor.Utilize pressing machine under 5000 tons pressure, powder compacting to be become thick film.At last, utilize screen printing technique on the zeolite thick film surface of above-mentioned acquisition, to print the golden interdigital electrode shown in accompanying drawing 1, obtain final y-type zeolite gas sensor based on the ZnO surface-coated.The line width of gold interdigital electrode is the 0.1-0.2 millimeter, and the width between line and the line is the 0.1-0.2 millimeter.
The test of sensor.Prepared sensor is placed under the mobile air atmosphere, and sensor element is heated to its operating temperature range between 250-350 ℃, introduce the methyl-phosphoric acid dimethyl ester gas molecule then.Through utilizing resistance value that AC impedance spectrometer survey sensor obtained under given frequency 3000Hz situation in air and the variation under the DMMP atmosphere that with the air is background, as the signal of sensor.Accompanying drawing 2 has provided and has recorded sensor 100ppm DMMP is responded curve over time, and after DMMP removed from air-flow, sensor sheet revealed good complete recovery characteristics.
Claims (1)
1. neuron harmful gas sensor based on the y-type zeolite material of ZnO surface coating; It is characterized in that constituting by y-type zeolite gas sensitive with ZnO surface coating and golden interdigital electrode; The y-type zeolite gas sensitive that at first prepares the ZnO surface coating is with Zn (NO
3)
2Be dissolved in the ethanol in 3: 7 ratio of mass ratio with y-type zeolite, be heated to 80 ℃, stir after 24 hours; With the ethanol volatilization totally; Get the white powder that deposits 550 ℃ of following roastings 2 hours, obtain the y-type zeolite powder of ZnO coating, under 5000 tons pressure, powder compacting is become thick film then; With screen printing technique golden interdigital electrode of printing on the thick film surface of preparation, electrode separation is the 0.1-0.2 millimeter, obtains the y-type zeolite gas sensor based on the ZnO surface coating again; The working temperature of sensor is in 250-350 degree scope, and sensor signal is under the frequency of 3000Hz, the impedance variations of sensor in moving air and neuron harmful gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104136204A CN102495104A (en) | 2011-12-12 | 2011-12-12 | Neuron harmful gas sensor based on Y-type zeolite material with zinc oxide (ZnO) surface coating |
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| CN2011104136204A CN102495104A (en) | 2011-12-12 | 2011-12-12 | Neuron harmful gas sensor based on Y-type zeolite material with zinc oxide (ZnO) surface coating |
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| CN102495104A true CN102495104A (en) | 2012-06-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980916A (en) * | 2012-11-19 | 2013-03-20 | 中国科学院上海硅酸盐研究所 | Zirconia-based NOx sensor and preparation method thereof |
| CN110681349A (en) * | 2019-11-19 | 2020-01-14 | 哈尔滨工业大学 | Preparation method and adsorption device of molecular pollution adsorption material with antistatic performance and zeolite molecular sieve coated with AZO film |
| CN113325042A (en) * | 2021-06-11 | 2021-08-31 | 吉林大学 | Sodium MTW molecular sieve, preparation method and application thereof, ammonia gas sensor, preparation method and application thereof |
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| CN101918824A (en) * | 2007-12-10 | 2010-12-15 | 西门子公司 | Gas sensor |
| CN102095759A (en) * | 2010-11-18 | 2011-06-15 | 大连理工大学 | Sensor of gas harmful to neuron based on Y-type zeolite film material |
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2011
- 2011-12-12 CN CN2011104136204A patent/CN102495104A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101918824A (en) * | 2007-12-10 | 2010-12-15 | 西门子公司 | Gas sensor |
| CN102095759A (en) * | 2010-11-18 | 2011-06-15 | 大连理工大学 | Sensor of gas harmful to neuron based on Y-type zeolite film material |
Non-Patent Citations (4)
| Title |
|---|
| 《American Chemical Society》 20110912 Jun Seop Lee等 "fabrication of ultrafine metal-oxide-decorated carbon nanofibers for DMMP sensor application" 第7992-8001页 1 第5卷, 第10期 * |
| 《J.Phys.Chem.C》 20101231 Xiaogan Li等 "interaction of dimethylmethylphosphonate with Zeolite Y：Impedance-based sensor for detecting nerve agent simulants" 第7986-7994页 1 第114卷, 第17期 * |
| JUN SEOP LEE等: ""fabrication of ultrafine metal-oxide-decorated carbon nanofibers for DMMP sensor application"", 《AMERICAN CHEMICAL SOCIETY》 * |
| XIAOGAN LI等: ""interaction of dimethylmethylphosphonate with Zeolite Y：Impedance-based sensor for detecting nerve agent simulants"", 《J.PHYS.CHEM.C》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980916A (en) * | 2012-11-19 | 2013-03-20 | 中国科学院上海硅酸盐研究所 | Zirconia-based NOx sensor and preparation method thereof |
| CN110681349A (en) * | 2019-11-19 | 2020-01-14 | 哈尔滨工业大学 | Preparation method and adsorption device of molecular pollution adsorption material with antistatic performance and zeolite molecular sieve coated with AZO film |
| CN113325042A (en) * | 2021-06-11 | 2021-08-31 | 吉林大学 | Sodium MTW molecular sieve, preparation method and application thereof, ammonia gas sensor, preparation method and application thereof |
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Application publication date: 20120613 |