CN107884447A - Preparation method of perovskite acetone sensing material and products thereof and application - Google Patents
Preparation method of perovskite acetone sensing material and products thereof and application Download PDFInfo
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- CN107884447A CN107884447A CN201711086335.XA CN201711086335A CN107884447A CN 107884447 A CN107884447 A CN 107884447A CN 201711086335 A CN201711086335 A CN 201711086335A CN 107884447 A CN107884447 A CN 107884447A
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- acetone
- perovskite
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- sensing material
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- 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
Abstract
The invention discloses a kind of preparation method of perovskite acetone sensing material and products thereof and application, DMF is dissolved in deionized water, is uniformly dispersed to form solution A with homogenizer after adding micrometer fibers element；Titanium chloride and strontium nitrate are dissolved in magnetic agitation in deionized water and form Ti3+And Sr2+Homogeneous blend obtains solution B, and solution B is added dropwise in solution A, and process does not stop to stir；Mixing liquid is put into Muffle furnace after drying in an oven and is heat-treated, and obtains the hollow fiber-shaped SrTiO of carbon coating3.Using the micrometer fibers element of big L/D ratio as skeleton, by Ti3+And Sr2+It is carried on long-chain, after heat treatment forms the hollow fiber-shaped SrTiO of carbon coating3, its feature is the porous hollow structure of threadiness, a large amount of absorption of acetone gas can be achieved, and the inventive method is simple to operate, and controllability is strong, is detected for acetone gas.
Description
Technical field
The present invention relates to the preparation method of acetone gas sensor, in particular to a kind of perovskite acetone sensing material and its
Product and application.
Background technology
Acetone is that the unregulated exhaust pollutant in vehicle exhaust one of mainly forms, and it is the intermediate oxidation of hydrocarbon fuel
Product, it is considered to be potential danger carcinogenic substance and important pollutant.For environmental protection and human health, to acetone detection method and
The research of apparatus has turned into one of focus for reducing motor vehicle emission research.Semi-conductor type acetone sensor has service life
The advantages that length, signal stabilization, cost is cheap in addition and is easy to on-line checking.
The research of sensing material property modification focuses mostly in the structured material for preparing bigger serface, such as nanometer at present
Pipe, bar array, how empty mould improve the sensitive of material for gaseous to improve gas absorption amount, lift gas diffusion rate
Degree, accelerate response speed.The present invention, which proposes, prepares hollow fibrous perovskite sensing material with micrometer fibers element template,
Develop high-specific surface area to realize detection sensitivity and quick response.
The content of the invention
For overcome the deficiencies in the prior art, present invention aims at：A kind of preparation of perovskite acetone sensing material is provided
Method.
Still a further object of the present invention is：Product prepared by a kind of above method is provided.
Another object of the present invention is：A kind of application of the above method is provided.
The object of the invention is realized by following proposal：A kind of preparation method of perovskite acetone sensing material, with big major diameter
The micrometer fibers element of ratio is used as skeleton, by Ti3+And Sr2+It is carried on long-chain, after heat treatment forms the hollow fibre of carbon coating
Shape SrTiO3, comprise the following steps：
(1) DMF is dissolved in deionized water, is uniformly dispersed to form solution A with homogenizer after adding micrometer fibers element；
(2) titanium chloride and strontium nitrate are dissolved in magnetic agitation in deionized water and form Ti3+And Sr2+Homogeneous blend obtains solution B,
Solution B, which is added dropwise in solution A, obtains mixing liquid, and process does not stop to stir；
(3) mixing liquid is put into Muffle furnace after drying in an oven and is heat-treated, and obtains the hollow fiber-shaped of carbon coating
SrTiO3。
Wherein, step（1）The content that the content of described micrometer fibers element is 0.05~0.4%, DFM is 0.5%.
Step（2）Described Ti:Sr=1:1, mixing speed 200~500rpm, Ti concentration are 0.2~1mol/l.
Step（3）Described heat treatment is with 5oC/min is warming up to 400oC, it is incubated 2~5 hours Temperature falls.
The present invention provides a kind of perovskite acetone sensing material, it is characterised in that is prepared into according to any of the above-described methods described
Arrive.
The present invention provides a kind of perovskite acetone sensing material and improves acetone air-sensitive material sensitivity in acetone detection
Using.
Obtained powder is sticked on hexagonal earthenware air-sensitive testing element, using WS-30A type air-sensitive original paper test systems
Measure the response of acetone gas.
Using the micrometer fibers element of big L/D ratio as skeleton, by Ti3+And Sr2+It is carried on long-chain, is after heat treatment formed
The hollow fiber-shaped SrTiO of carbon coating3, its feature be threadiness porous hollow structure, can be achieved acetone gas it is a large amount of
Absorption, the inventive method is simple to operate, and controllability is strong, is detected for acetone gas.The present invention, which proposes, utilizes cellulose template
To obtain the powder with high-specific surface area, and then the sensitivity of acetone air-sensitive material is improved, this method prepares simple, controllability
By force, available for producing high-quality gas sensor.
Brief description of the drawings
Fig. 1 is using the present invention（Embodiment 1）Acetone air-sensitive performance.
Embodiment
Embodiment 1
The DMF for weighing 0.5g is dissolved in 100ml deionized water, and addition 0.05g micrometer fibers elements, which are put into homogenizer, to be mixed
Uniformly, solution A is obtained；The strontium nitrate of the titanium chloride and 4.23g that continue to weigh 3.08g is dissolved in magnetic agitation in deionized water and formed
Ti3+And Sr2+Homogeneous blend obtains solution B, and solution B is added dropwise in solution A, process 200rpm stirrings, after being put into oven drying
In Muffle furnace with 5oC/min is warming up to 400oC, insulation is dropped for 2 hours naturally obtains the hollow fiber-shaped SrTiO of carbon coating3.Will
To powder stick on hexagonal earthenware air-sensitive testing element, using WS-30A type air-sensitive original papers test system measure acetone gas
Response, see Fig. 1 be using the present embodiment acetone air-sensitive performance.
Embodiment 2
The DMF for weighing 0.5g is dissolved in 100ml deionized water, and addition 0.4g micrometer fibers elements, which are put into homogenizer, to be mixed
It is even, obtain solution A；The strontium nitrate of the titanium chloride and 21.15g that continue to weigh 15.4g is dissolved in magnetic agitation in deionized water and formed
Ti3+And Sr2+Homogeneous blend obtains solution B, and solution B is added dropwise in solution A, process 500rpm stirrings, after being put into oven drying
In Muffle furnace with 5oC/min is warming up to 400oC, insulation is dropped for 5 hours naturally obtains the hollow fiber-shaped SrTiO of carbon coating3.Will
To powder stick on hexagonal earthenware air-sensitive testing element, using WS-30A type air-sensitive original papers test system measure acetone gas
Response, 0.2ppm sensitivity is 0.9.
Embodiment 3
The DMF for weighing 0.5g is dissolved in 100ml deionized water, and addition 0.25g micrometer fibers elements, which are put into homogenizer, to be mixed
Uniformly, solution A is obtained；The barium nitrate of the titanium chloride and 10.575g that continue to weigh 7.7g is dissolved in magnetic agitation shape in deionized water
Into Ti3+And Sr2+Homogeneous blend obtains solution B, and solution B is added dropwise in solution A, process 200rpm stirrings, is put into oven drying
Afterwards in Muffle furnace with 5oC/min is warming up to 400oC, insulation is dropped for 3.5 hours naturally obtains the hollow fiber-shaped SrTiO of carbon coating3。
Obtained powder is sticked on hexagonal earthenware air-sensitive testing element, acetone is measured using WS-30A type air-sensitive original papers test system
The response of gas, sensitivity 1.2.
Claims (6)
- A kind of 1. preparation method of perovskite acetone sensing material, it is characterised in that using the micrometer fibers element of big L/D ratio as Skeleton, by Ti3+And Sr2+It is carried on long-chain, after heat treatment forms the hollow fiber-shaped SrTiO of carbon coating3, including following step Suddenly：(1) DMF is dissolved in deionized water, is uniformly dispersed to form solution A with homogenizer after adding micrometer fibers element；(2) titanium chloride and strontium nitrate are dissolved in magnetic agitation in deionized water and form Ti3+And Sr2+Homogeneous blend obtains solution B, Solution B, which is added dropwise in solution A, obtains mixing liquid, and process does not stop to stir；(3) mixing liquid is put into Muffle furnace after drying in an oven and is heat-treated, and obtains the hollow fiber-shaped SrTiO of carbon coating3。
- 2. the preparation method of perovskite acetone sensing material as described in claim 1, it is characterised in that step（1）Described is micro- The content that the content of rice cellulose is 0.05~0.4%, DFM is 0.5%.
- 3. the preparation method of perovskite acetone sensing material as described in claim 1, it is characterised in that step（2）Described Ti: Sr=1:1, mixing speed 200~500rpm, Ti concentration are 0.2~1mol/l.
- 4. the preparation method of perovskite acetone sensing material as described in claim 1, it is characterised in that step（3）Described heat Processing is with 5oC/min is warming up to 400oC, it is incubated 2~5 hours Temperature falls.
- 5. a kind of perovskite acetone sensing material, it is characterised in that be prepared according to any methods describeds of claim 1-4.
- 6. perovskite acetone sensing material improves acetone air-sensitive material sensitivity in acetone detection according to claim 5 Using.
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| CN201711086335.XA CN107884447A (en) | 2017-11-07 | 2017-11-07 | Preparation method of perovskite acetone sensing material and products thereof and application |
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| US20030026985A1 (en) * | 2001-07-13 | 2003-02-06 | Creavis Gesellschaft F. Techn. U. Innovation Mbh | Tubes having internal diameters in the nanometer range |
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| CN103972478A (en) * | 2014-05-13 | 2014-08-06 | 北京化工大学 | Hollow carbon nanofiber material as well as preparation method and application thereof |
| CN104383905A (en) * | 2014-11-11 | 2015-03-04 | 上海交通大学 | Method for preparing multi-element metal oxide with hierarchical structure from biomass template |
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|---|---|---|---|---|
| US20030026985A1 (en) * | 2001-07-13 | 2003-02-06 | Creavis Gesellschaft F. Techn. U. Innovation Mbh | Tubes having internal diameters in the nanometer range |
| 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 |
| CN102126745A (en) * | 2011-01-24 | 2011-07-20 | 济南大学 | Nano zinc metastannate air-sensitive material with hollow fiber structure and preparation method thereof |
| CN102331443A (en) * | 2011-07-13 | 2012-01-25 | 东华大学 | Acetone gas sensor and manufacturing method thereof |
| CN103972478A (en) * | 2014-05-13 | 2014-08-06 | 北京化工大学 | Hollow carbon nanofiber material as well as preparation method and application thereof |
| CN104383905A (en) * | 2014-11-11 | 2015-03-04 | 上海交通大学 | Method for preparing multi-element metal oxide with hierarchical structure from biomass template |
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| R. BENE 等: ""High-temperature semiconductor gas sensors"", 《VACUUM》 * |
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