CN103159255A - Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof - Google Patents
Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof Download PDFInfo
- Publication number
- CN103159255A CN103159255A CN2013100840283A CN201310084028A CN103159255A CN 103159255 A CN103159255 A CN 103159255A CN 2013100840283 A CN2013100840283 A CN 2013100840283A CN 201310084028 A CN201310084028 A CN 201310084028A CN 103159255 A CN103159255 A CN 103159255A
- Authority
- CN
- China
- Prior art keywords
- lanthanum
- yttrium
- titanium oxide
- solution
- codoped
- 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
Images
Abstract
The invention relates to a lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as a preparation method and an application thereof. The material is prepared by the steps of: by taking nano-titanium dioxide as a matrix and the amount of titanium substances as a base number, doping 0.1-0.8 mol% of lanthanum and 0.1-0.8 mol% of yttrium, dripping ethanol solution of tetrabutyl titanate into the ethanol solution of lanthanum nitrate and yttrium nitrate by utilizing a sol-gel method to prepare sol, and drying, grinding and roasting the sol. The grain diameter of the obtained lanthanum-yttrium-codoped nano-titanium dioxide is 35-70 nm. The invention further provides the preparation method of the material. The obtained gas-sensitive material is used for producing gas-sensitive sensors for detecting o-chlorophenol, is high in sensitivity, good in selectivity and short in response time and is beneficial for realizing fast detection of the o-chlorophenol.
Description
Technical field
The present invention relates to the nano titanium oxide gas sensitive and preparation method thereof and application of a kind of lanthanum, yttrium codoped, belong to the gas sensitive technical field.
Background technology
Ortho chloro phenol, namely the 2-chlorophenol, be a kind of important industrial chemicals, is widely used in organic synthesis and makes dyestuff.Owing to being easy to volatilization, animal, plantsand water and soil are all produced serious harm, therefore be confirmed as a kind of persistence organic pollutant.At present, mainly adopt vapor-phase chromatography and Chromatography/Mass Spectrometry method that ortho chloro phenol is detected.Because these methods need large-scale precision instrument, carry inconvenience, thereby limited its application that detects in real time.How ortho chloro phenol is detected as quickly and accurately one of focus of paying close attention to into people.
Nano material is made into gas sensor to the existing patent literature of the research of persistence organic pollutant examinations.The applicant's patent document CN101281159A (CN200810016320.0) has realized the real-time detection to chlorobenzene and ethanol by the nano zine oxide of sheet porous structural is made gas sensor.The nano zine oxide gas sensitive of the sheet porous structural that adopts in this invention is grown (103s) to the time of response of chlorobenzene.Up to now, the gas sensitive that detects for ortho chloro phenol or the report of gas sensor are still rare.Therefore; further the new gas sensor of research and development in time detects persistence organic pollutant (particularly to ortho chloro phenol) easily with realization; satisfying the environmental protection production process to the control of the ortho chloro phenol content in air ambient, be of great significance for the tool that improves of current environment protection especially Air quality.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, the nano titanium oxide gas sensitive and preparation method thereof and application of a kind of lanthanum, yttrium codoped is provided.
Technical scheme of the present invention is as follows:
The nano titanium oxide gas sensitive of a kind of lanthanum, yttrium codoped, this material is take nano titanium oxide as matrix, take the titanium amount of substance as radix, doped with the lanthanum of 0.1～0.8mol% and the yttrium of 0.1～0.8mol%, to adopt sol-gel method with the ethanolic soln of tetrabutyl titanate, be added drop-wise in the ethanolic soln of lanthanum nitrate and Yttrium trinitrate and make colloidal sol, then drying, grinding, roasting make.
The nano titanium oxide gas sensitive of lanthanum, yttrium codoped according to the present invention, preferred, this material is take the titanium amount of substance as radix, and the molecular fraction of doping lanthanum is 0.2%, and the molecular fraction of doped with yttrium is 0.2%.
According to the present invention, the preparation method of the nano titanium oxide gas sensitive of a kind of lanthanum, yttrium codoped comprises that step is as follows:
(1) tetrabutyl titanate is dissolved in dehydrated alcohol, stirs 25～30min under room temperature, form solution A; Glacial acetic acid is dissolved in deionized water, gets solution B;
(2) solution A is splashed in solution B, stir while dripping, and transfer to pH=3～3.5 with acid, get solution C;
(3) according to the mol ratio of Ti/La/Y=1:0.001～0.008:0.001～0.008, with the Yi Chun – water mixed solution of lanthanum nitrate and Yttrium trinitrate, splash in the solution C that step (2) makes, stirring at room 70～90min, standing 10～24h gets colloidal sol;
(4) colloidal sol that step (3) is made is placed in 65～85 ℃ of drying 4～6h of loft drier, gets gel; The gained gel in 600～1000 ℃ of temperature roasting 1～3h, obtains the nano-titanium dioxide powder of lanthanum, yttrium codoped after grinding, and is the nano titanium oxide gas sensitive of lanthanum of the present invention, yttrium codoped.
Dehydrated alcohol in described step (1), deionized water consumption are that meltage gets final product.Preferably, the volume ratio 2.0～2.5:10 of tetrabutyl titanate and dehydrated alcohol; The volume ratio of Glacial acetic acid and deionized water is 1.5～2:1.
According to the present invention, preferred, the acid in step (2) is 6moldm
-3Nitric acid; Step utilizes constant pressure funnel that solution A is splashed in solution B in (2).
According to the present invention, preferred, the Ti/La/Y mol ratio=1:0.002:0.002 in step (3).
Preferably, the Yi Chun – water mixed solution composition of the lanthanum nitrate in step (3) and Yttrium trinitrate is that the volume ratio of deionized water and dehydrated alcohol is 2～2.5:3, La/Y mol ratio=1:1, lanthanum nitrate and Yttrium trinitrate total content are 0.25～1.0% quality volume percent, the g/mL of unit.
According to the present invention, preferred, the time of repose described in step (3) is 15～20h.
According to the present invention, preferred, in step (4), the loft drier temperature is 80 ℃, and be 6h time of drying;
According to the present invention, preferred, the roasting condition described in step (4) is 900 ℃ of roasting 2h.
The median size of the nano titanium oxide of the lanthanum that makes according to the present invention, yttrium codoped is 35～70nm.
According to the present invention, highly preferred scheme is the embodiment 1 in embodiment, and the air-sensitive performance of the lanthanum for preparing under this embodiment 1 condition, the nano titanium oxide of yttrium codoped is best.
The present invention adopts sol-gel method to prepare the nano titanium oxide of lanthanum, yttrium codoped.Use tetrabutyl titanate to be the titanium source, ethanol is solvent, and lanthanum nitrate and Yttrium trinitrate are the doping precursor, and under room temperature, mix and blend obtains colloidal sol, then drying obtains gel.The nano titanium oxide of lanthanum, yttrium codoped is prepared in the gel roasting, and median size is 35～70nm.
The application of the nano titanium oxide gas sensitive of lanthanum of the present invention, yttrium codoped is used for making the gas-sensitive sensor device that ortho chloro phenol detects.
Above-mentioned application according to the nano titanium oxide gas sensitive of lanthanum of the present invention, yttrium codoped, the nano-titanium dioxide powder (gas sensitive) of described lanthanum, yttrium codoped is coated on vitrified pipe, make tube core after sintering, according to heater-type device common process weld, encapsulate, electricity is aging, makes gas-sensitive sensor device.Can prepare by prior art, referring to CN101281159A.
With the gas-sensitive sensor device of making, with the performance of HW-30A type air-sensitive tester test gas-sensitive sensor device, to the air-sensitive testing method of ortho chloro phenol, test atmosphere adopts static distribution method to measure under certain working temperature.Referring to CN101281159A.Use the nano-titanium dioxide powder by lanthanum, yttrium codoped of the present invention and make gas sensor, can realize the rapid detection to ortho chloro phenol.
Compared with prior art, excellent results of the present invention is as follows:
1. the present invention by appropriate lanthanum and the yttrium of doping in titanium dioxide, has changed the titanium dioxide lattice parameter, increases lattice imperfection, has improved air-sensitive performance; Also improved simultaneously the stability of gas-sensitive sensor device.
2. in preparation method of the present invention, ethanol is as solvent, and raw material is easy to get, and low price is conducive to again lanthanum, the yttrium Uniform Dispersion in titanium dioxide simultaneously, improves the gas sensing property to ortho chloro phenol.
3. the use of lanthanum nitrate and Yttrium trinitrate has reduced the generation of byproduct, makes product purity high.
4. the nano titanium oxide gas sensitive of the lanthanum of the present invention's use, yttrium codoped is as the gas sensitive base material, and the gas-sensitive sensor device of producing is highly sensitive, selectivity good, and the time of response is short, and good stability is beneficial to the rapid detection that realizes ortho chloro phenol.The nano titanium oxide gas sensitive of experimental result demonstration lanthanum of the present invention, yttrium codoped is 20s to the time of response of ortho chloro phenol.
Description of drawings
Fig. 1 is the X-ray diffraction spectrogram of nano-titanium dioxide powder of lanthanum, the yttrium codoped of embodiment 1 preparation.La/Y/TiO wherein
2(the La/Y/Ti mol ratio=0.002:0.002:1).
Fig. 2 is the transmission electron microscope photo of nano-titanium dioxide powder of lanthanum, the yttrium codoped of embodiment 1 preparation.
Fig. 3 is the X-ray energy spectrum collection of illustrative plates of nano-titanium dioxide powder of lanthanum, the yttrium codoped of embodiment 1 preparation; X-coordinate is energy (Energy), unit, KeV.
Fig. 4 is the gas-sensitive sensor device that the nano-titanium dioxide powder of lanthanum, the yttrium codoped of embodiment 2 is made, when 210 ℃ of working temperatures to the air-sensitive test curve of 100ppm ortho chloro phenol.
Fig. 5 is the gas-sensitive sensor device that the nano-titanium dioxide powder of lanthanum, the yttrium codoped of embodiment 2 is made, the sensitivity test curve in 90 days.
Embodiment
The present invention will be further described below in conjunction with embodiment, but institute of the present invention protection domain is not limited to this.
Embodiment 1,
The nano titanium oxide gas sensitive of lanthanum, yttrium codoped, take nano titanium oxide as matrix, take the titanium dioxide amount of substance as radix, the molecular fraction of doping lanthanum is 0.2%; The molecular fraction of yttrium is 0.2%; The median size of the nano titanium oxide of codoped is 56nm.
Preparation process is as follows:
(1) the 3.4mL tetrabutyl titanate is dissolved in the 16mL dehydrated alcohol, stirs 30min under room temperature, form solution A; The 2.0mL Glacial acetic acid is added in the 1mL deionized water, get solution B;
(2) pour solution A into constant pressure funnel, slowly splash in solution B, stir while dripping, and use 6moldm
-3Nitric acid transfer to pH=3, get solution C;
(3) according to the mol ratio of Ti/La/Y=1:0.002:0.002, with 0.0066g lanthanum nitrate (La (NO
3)
3) and 0.0076g Yttrium trinitrate (Y (NO
3)
36H
2O) be dissolved in the mixing solutions that 2mL deionized water and 3mL dehydrated alcohol form, and slowly splash in the solution C that step (3) makes, stirring at room 90min, standing 15～20h gets colloidal sol;
(4) colloidal sol that step (3) is made is after being placed in 80 ℃ of dry 6h of loft drier, in 900 ℃ of roasting 2h and get final product.
The X-ray energy spectrum collection of illustrative plates of the nano-titanium dioxide powder of the lanthanum that makes, yttrium codoped as described in Figure 3, analytical results shows in the nano titanium oxide of La/Y codoped and has La, Y, Ti and O element.In product, the molecular fraction of lanthanum is 0.2%, and the molecular fraction of yttrium is 0.2%, and the median size of the nano titanium oxide of codoped is 56nm(such as Fig. 2).
The application of the nano titanium oxide gas sensitive of embodiment 2, lanthanum, yttrium codoped
Get the lanthanum of embodiment 1 preparation, the nano-titanium dioxide powder 5mg of yttrium codoped, after porphyrize, add a small amount of deionized water furnishing pasty state, evenly be coated on alumina ceramic tube, be placed in sintering 2h in 300 ℃ of retort furnaces, make tube core, and according to heater-type device common process weld, encapsulated moulding gets gas-sensitive sensor device.Through after electric aging 120h, measure the character of gas-sensitive sensor device with HW-30A type air-sensitive tester.
210 ℃ of working temperatures, the sensitivity of the ortho chloro phenol of test 100ppm.From the response-recovery curve of this gas-sensitive sensor device to the 100ppm ortho chloro phenol, as shown in Figure 4, are respectively the response of ortho chloro phenol and time of recovery as can be known 20s and 110s.
Add appropriate lanthanum and yttrium, the sensitivity that not only can improve gas sensor, but also permanent stability and the work-ing life that can improve gas sensor in nm TiO 2-base body material.The sensitivity number of nano titanium oxide gas-sensitive sensor device in 90 days to lanthanum, yttrium codoped tested.The experimental result discovery, the sensitivity number of nano titanium oxide gas-sensitive sensor device in 90 days of lanthanum, yttrium codoped remains unchanged substantially, shows that this gas sensor has stability and long work-ing life preferably.As shown in Figure 5.
The nano titanium oxide gas sensitive of embodiment 3, lanthanum, yttrium codoped, as described in Example 1, difference is: the molecular fraction of doping lanthanum is 0.4%; The molecular fraction of yttrium is 0.8%; The median size of the nano titanium oxide of codoped is 68nm.
Preparation process is as follows:
(1) the 3.4mL tetrabutyl titanate is dissolved in the 16mL dehydrated alcohol, stirs 30min under room temperature, form solution A;
(2) the 2.0mL Glacial acetic acid is added in the 1mL deionized water, get solution B;
(3) pour solution A into constant pressure funnel, slowly splash in solution B, stir while dripping, and use 6moldm
-3Nitric acid transfer to pH ≈ 3, get solution C;
(4) according to the mol ratio of Ti/La/Y=1:0.004:0.008, with 0.0132g lanthanum nitrate (La (NO
3)
3) and 0.0304g Yttrium trinitrate (Y (NO
3)
36H
2O) be dissolved in the mixing solutions that 2mL deionized water and 3mL dehydrated alcohol form, and slowly splash in the solution C that step (3) makes, stirring at room 90min, standing 10～24h gets colloidal sol;
(5) colloidal sol that step (4) is made after being placed in 80 ℃ of dry 6h of loft drier, in 1000 ℃ of roasting 2h, makes the lanthanum that median size is 68nm, the nano titanium oxide of yttrium codoped.
Claims (10)
1. the nano titanium oxide gas sensitive of a lanthanum, yttrium codoped, this material is take nano titanium oxide as matrix, take the titanium amount of substance as radix, doped with the lanthanum of 0.1～0.8mol% and the yttrium of 0.1～0.8mol%, to adopt sol-gel method with the ethanolic soln of tetrabutyl titanate, be added drop-wise in the ethanolic soln of lanthanum nitrate and Yttrium trinitrate and make colloidal sol, then drying, grinding, roasting make.
2. the nano titanium oxide gas sensitive of lanthanum as claimed in claim 1, yttrium codoped, is characterized in that take the titanium dioxide amount of substance as radix, and the molecular fraction of doping lanthanum is 0.2%, and the molecular fraction of doped with yttrium is 0.2%.
3. the preparation method of the nano titanium oxide gas sensitive of a lanthanum, yttrium codoped comprises that step is as follows:
(1) tetrabutyl titanate is dissolved in dehydrated alcohol, stirs 25～30min under room temperature, form solution A; Glacial acetic acid is dissolved in deionized water, gets solution B;
(2) solution A is splashed in solution B, stir while dripping, and transfer to pH=3～3.5 with acid, get solution C;
(3) according to the mol ratio of Ti/La/Y=1:0.001～0.008:0.001～0.008, with the alcohol-water mixing solutions of lanthanum nitrate and Yttrium trinitrate, splash in the solution C that step (2) makes, stirring at room 70～90min, standing 10～24h gets colloidal sol;
(4) colloidal sol that step (3) is made is placed in 65～85 ℃ of drying 4～6h of loft drier, gets gel; The gained gel in 600～1000 ℃ of temperature roasting 1～3h, gets the nano-titanium dioxide powder of lanthanum, yttrium codoped after grinding.
4. the preparation method of the nano titanium oxide gas sensitive of lanthanum as claimed in claim 3, yttrium codoped, is characterized in that in step (1) the volume ratio 2.0～2.5:10 of tetrabutyl titanate and dehydrated alcohol; The volume ratio of Glacial acetic acid and deionized water is 1.5～2:1.
5. the preparation method of the nano titanium oxide gas sensitive of lanthanum as claimed in claim 3, yttrium codoped, is characterized in that the acid in step (2) is 6moldm
-3Nitric acid.
6. the preparation method of the nano titanium oxide gas sensitive of lanthanum as claimed in claim 3, yttrium codoped, is characterized in that in step (3) Ti/La/Y mol ratio=1:0.002:0.002.
7. the preparation method of the nano titanium oxide gas sensitive of lanthanum as claimed in claim 3, yttrium codoped, is characterized in that in step (4), the loft drier temperature is 80 ℃, and be 6h time of drying;
8. the preparation method of the nano titanium oxide gas sensitive of lanthanum as claimed in claim 3, yttrium codoped, is characterized in that the roasting condition described in step (4) is 900 ℃ of roasting 2h.
9. the preparation method of the nano titanium oxide gas sensitive of lanthanum as claimed in claim 3, yttrium codoped is characterized in that step is as follows:
(1) the 3.4mL tetrabutyl titanate is dissolved in the 16mL dehydrated alcohol, stirs 30min under room temperature, form solution A; The 2.0mL Glacial acetic acid is added in the 1mL deionized water, get solution B;
(2) pour solution A into constant pressure funnel, splash in solution B, stir while dripping, and use 6moldm
-3Nitric acid transfer to pH=3, get solution C;
(3) press the mol ratio of Ti/La/Y=1:0.002:0.002, with 0.0066g lanthanum nitrate (La (NO
3)
3) and 0.0076g Yttrium trinitrate (Y (NO
3)
36H
2O) be dissolved in the mixing solutions that 2mL deionized water and 3mL dehydrated alcohol form, and splash in the solution C that step (3) makes, stirring at room 90min, standing 15～20h gets colloidal sol;
(4) colloidal sol that step (3) is made is after being placed in 80 ℃ of dry 6h of loft drier, in 900 ℃ of roasting 2h and get final product.
10. the application of the nano titanium oxide gas sensitive of the described lanthanum of claim 1 or 2, yttrium codoped is used for making the gas-sensitive sensor device that ortho chloro phenol detects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084028.3A CN103159255B (en) | 2013-03-15 | 2013-03-15 | Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084028.3A CN103159255B (en) | 2013-03-15 | 2013-03-15 | Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103159255A true CN103159255A (en) | 2013-06-19 |
| CN103159255B CN103159255B (en) | 2015-03-11 |
Family
ID=48582835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310084028.3A Expired - Fee Related CN103159255B (en) | 2013-03-15 | 2013-03-15 | Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103159255B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749324A (en) * | 2015-03-26 | 2015-07-01 | 曲阜师范大学 | Morphological-control nano titanium dioxide doped with inorganic vanadate and palladium salt as well as preparation method and application of morphological-control nano titanium dioxide |
| CN106053581A (en) * | 2016-05-18 | 2016-10-26 | 南京师范大学 | Method for detecting o-chlorophenol based on PEDOT/g-C3N4 electrode |
| CN106565232A (en) * | 2016-10-11 | 2017-04-19 | 洛阳鼎威材料科技有限公司 | Titanium dioxide gas sensitive film preparation method |
| CN113044884A (en) * | 2020-04-03 | 2021-06-29 | 苏州泛氢新材料科技有限公司 | Titanium dioxide hydrogen-sensitive material, preparation method and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435685A (en) * | 2002-01-29 | 2003-08-13 | 清华大学 | Luminous gas-sensitive sensor based on nanomaterial and process for film-forming of nanomaterial |
| CN1527051A (en) * | 2003-09-23 | 2004-09-08 | 清华大学 | Organic gas testing nano material method and sensor |
| CN101551351A (en) * | 2009-05-07 | 2009-10-07 | 郑俊褒 | VOCs detection system and detection method based on photocatalysis technology and self-cleaning method thereof |
| CN101721990A (en) * | 2009-12-04 | 2010-06-09 | 天津大学 | Method for preparing double rare-earth elements La and Y doped TiO2 photocatalyst |
| CN102068980A (en) * | 2010-12-08 | 2011-05-25 | 华南农业大学 | Erbium-doped titanium dioxide nano tube and preparation method and application thereof |
-
2013
- 2013-03-15 CN CN201310084028.3A patent/CN103159255B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435685A (en) * | 2002-01-29 | 2003-08-13 | 清华大学 | Luminous gas-sensitive sensor based on nanomaterial and process for film-forming of nanomaterial |
| CN1527051A (en) * | 2003-09-23 | 2004-09-08 | 清华大学 | Organic gas testing nano material method and sensor |
| CN101551351A (en) * | 2009-05-07 | 2009-10-07 | 郑俊褒 | VOCs detection system and detection method based on photocatalysis technology and self-cleaning method thereof |
| CN101721990A (en) * | 2009-12-04 | 2010-06-09 | 天津大学 | Method for preparing double rare-earth elements La and Y doped TiO2 photocatalyst |
| CN102068980A (en) * | 2010-12-08 | 2011-05-25 | 华南农业大学 | Erbium-doped titanium dioxide nano tube and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| TIANYONG ZHANG, ET AL.: "Preparation and photocatalytic activity of La and Y co-doped nano TiO2", 《JOURNAL OF PHYSICS: CONFERENCE SERIES》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749324A (en) * | 2015-03-26 | 2015-07-01 | 曲阜师范大学 | Morphological-control nano titanium dioxide doped with inorganic vanadate and palladium salt as well as preparation method and application of morphological-control nano titanium dioxide |
| CN104749324B (en) * | 2015-03-26 | 2016-07-27 | 曲阜师范大学 | Adulterate nano titanium oxide of inorganic vanadic salts and palladium salt regulation and control pattern and preparation method and application |
| CN106053581A (en) * | 2016-05-18 | 2016-10-26 | 南京师范大学 | Method for detecting o-chlorophenol based on PEDOT/g-C3N4 electrode |
| CN106053581B (en) * | 2016-05-18 | 2018-07-27 | 南京师范大学 | One kind being based on PEDOT/g-C3N4The method of electrode detection o-chlorphenol |
| CN106565232A (en) * | 2016-10-11 | 2017-04-19 | 洛阳鼎威材料科技有限公司 | Titanium dioxide gas sensitive film preparation method |
| CN113044884A (en) * | 2020-04-03 | 2021-06-29 | 苏州泛氢新材料科技有限公司 | Titanium dioxide hydrogen-sensitive material, preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103159255B (en) | 2015-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100592082C (en) | Formaldehyde air-sensitive material and its preparation method and preparation method for formaldehyde air-sensitive device | |
| CN103901081B (en) | ZnO-In 2o 3nano semiconductor crystal gas sensitive preparation method | |
| CN104003454B (en) | Porous oxidation cobalt nanowire and preparation method thereof and application | |
| CN108663417B (en) | One kind being directed to low concentration of NO2The novel I n of gas2O3/Sb2O3Composite hollow nanotube gas sensitive | |
| CN104569080A (en) | Acetone gas sensor based on hollow spherical ZnFe2O4 nano material and preparation method thereof | |
| CN103101973B (en) | Vanadium and palladium-codoped nanometer titania gas-sensitive material as well as preparation method and applications thereof | |
| CN103159255B (en) | Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof | |
| CN101419181A (en) | Air-sensitive material for detecting oxymethylene and air-sensitive device made from the material | |
| CN106093137A (en) | A kind of based on α Fe2o3acetone gas sensor of multi-pore micron flower sensitive material and preparation method thereof | |
| CN107164839B (en) | Formaldehyde sensitive material CdGa2O4 and preparation method thereof with hypersensitivity and selectivity | |
| CN102557114A (en) | Preparation method of indium oxide-based gas-sensitive material with three-dimensional hollow multi-stage structure and application thereof | |
| CN104950017A (en) | Gas sensor based on core-shell flower-ball-shaped ZnFe2O4 nanometer materials, preparing method and application thereof | |
| CN103274451B (en) | The synthesis of tindioxide/zinc oxide nuclear-shell structured nano-composite material and application | |
| CN102507662B (en) | Preparation methods of lanthanum-doped cobalt nickel ferrite gas-sensitive powder and gas sensor | |
| CN106770498A (en) | Acetone sensor, the preparation method and application of the rhodium doped stannic oxide nanometer fiber sensitive material prepared based on electrostatic spinning technique | |
| CN107655942A (en) | A kind of LaFeO based on core-shell particles structure3Acetone gas sensor of nano sensitive material and preparation method thereof | |
| CN100406880C (en) | Formaldehyde gas sensitive device with laminated sensitive layer and preparation method thereof | |
| CN105347403A (en) | High-selectivity formaldehyde gas-sensitive material and preparation method and application thereof | |
| CN105548270A (en) | Methylbenzene gas sensor based on alpha-Fe2O3/SnO2 heterostructure nanowire array and preparation method of methylbenzene gas sensor | |
| CN106018496A (en) | Method for preparing high-sensitivity low working temperature ethanol gas sensor element | |
| CN101943692A (en) | Air-sensitive material with high-sensitivity and quick-response, and preparation method and application thereof | |
| CN109342521B (en) | In doped with alkaline earth metal2O3Formaldehyde sensitive material and application thereof in formaldehyde detection | |
| CN108205002B (en) | L aFeO with high gas response and selectivity3Ethanol-based gas sensor element and method for manufacturing same | |
| CN106290486A (en) | A kind of New Co TiO3the preparation method and application of gas sensitive | |
| CN103691473B (en) | A kind of Bentonite/graphite phase carbon nitride composite material and preparation method thereof |
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: 20150311 Termination date: 20160315 |