CN102464350A - Method for synthesizing netty nanometer metal oxide by eggshell inner membrane as template - Google Patents
Method for synthesizing netty nanometer metal oxide by eggshell inner membrane as template Download PDFInfo
- Publication number
- CN102464350A CN102464350A CN2010105448942A CN201010544894A CN102464350A CN 102464350 A CN102464350 A CN 102464350A CN 2010105448942 A CN2010105448942 A CN 2010105448942A CN 201010544894 A CN201010544894 A CN 201010544894A CN 102464350 A CN102464350 A CN 102464350A
- Authority
- CN
- China
- Prior art keywords
- gallus domesticus
- metal
- template
- inner membrance
- crusta gallus
- 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.)
- Pending
Links
Images
Landscapes
- Catalysts (AREA)
Abstract
The invention relates to a method for synthesizing a netty nanometer metal oxide by an eggshell inner membrane as a template. The method comprises the following steps of putting a metal nitrate into a reactor, adding isopropanol and water for volume metering until the concentration is 0.5mol/L, adding an eggshell inner membrane into the reactor, carrying out dipping for 8 to 10 hours, taking out the dipped eggshell inner membrane, drying the dipped eggshell inner membrane in air, putting the dried eggshell inner membrane into a tubular furnace, heating to a temperature of 640 to 660 DEG C at a heat rate of 3 to 4 DEG C per second, carrying out calcination for 1 to 2 hours, and cooling to a room temperature in air. Compared with the prior art, the method provided by the invention has advantages that processes are simple; a product can be treated conveniently and easily; precious metals of Pt and Pd or other rare earth metals are not used; the method is conducive to cost saving; response time is reduced; and the method has strong versatility and good development prospects.
Description
Technical field
The present invention relates to a kind of compound method, especially relating to a kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance.
Background technology
Sensing technology is a comprehensive branch of learning that relates to multi-door subjects such as physics, electronics, materialogy, chemistry; It is a new and high technology subject; Received the concern of many countries such as the U.S., China has also classified Research on Sensing as one of " 95 " state key science and technology item.Wherein, the air-sensitive sensing be sensing technology an important branch it can the information translation such as concentration of gas be become electric signal, obtain the exist situation of this gas whereby, thereby detect, warning etc. in atmospheric environment.Through the development of over half a century, gas sensing has had hundreds of, have highly sensitive, the time of response is fast, advantage such as easy to use.
The core of gas sensor is a gas sensitive.The more of research is the Metal Oxide Semiconductor Gas Sensing material, overcome factors such as organic materials sensor for temperature instability.Wherein, the more and more perfect of research is SnO
2System, ZnO system, Fe
2O
3System is in recent years to In
2O
3Research also more.SnO
2Be to be studied and to use maximum semiconductor materials, to CO, Cl
2, NH
3, H
2S, etc. inorganic gas and organic gass such as ethanol, toluene, through changing compound method or the different metal of the different ratios that mixes, obtain the gas sensitive of different pattern varying sensitivities; Pure ZnO, In
2O
3Sensitivity detection to multiple gases is lower, and how rare earth doped oxide compound improves the detection performance; Fe
2O
3Be widely used at aspects such as magneticsubstance, battery material, gas sensitives.
70% is all caused by gas explosion in the accident of well ore deposit, and methane is the staple of gas, accounts for 95%.The methane that in air, is mixed with 5-16% is to blast; CO is the staple that causes carbon monoxide poisoning, the back death by suffocation of poisoning; Industrial expansion makes and in air, discharges a large amount of SO by a large amount of coal burnings
2, H
2S etc., contaminate environment; Detect the driver and whether can use gas sensor in drunk driving or the like aspect.
Summary of the invention
The object of the invention is exactly that what provide in order to overcome the defective that above-mentioned prior art exists that a kind of technology is simple, cost is lower, time of recovery is short is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance.
The object of the invention can be realized through following technical scheme:
A kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, it is characterized in that this method may further comprise the steps:
(1) metal nitrate is placed reactor drum, it is 0.5mol/L that adding Virahol and water are settled to concentration;
(2) inner membrance of adding Ovum crusta Gallus domesticus in the solution that step (1) makes takes out behind dipping 8～10h, dries naturally;
(3) will handle the Ovum crusta Gallus domesticus inner membrance that obtains through step (2) and place tube furnace, the control temperature rise rate is 3～4 ℃/s, is warming up to 640～660 ℃ of calcining 1～2h, naturally cools to room temperature and gets final product.
Metal nitrate described in the step (1) is the nitric acid solution of tin, adopts following treating processes to obtain: the tin grain is gone out surface dirt through sonic oscillation, and adding the concentrated nitric acid preparation then, to obtain concentration be 0.28～0.3g/ml.
Metal nitrate described in the step (1) is an indium nitrate.
Metal nitrate described in the step (1) is the mixture of nitric acid solution of tin and indium nitrate; Adopt following treating processes to obtain: the tin grain is gone out surface dirt through sonic oscillation; Adding concentrated nitric acid preparation then, to obtain concentration be 0.28～0.3g/ml; To wherein adding indium nitrate, the concentration of control indium nitrate is 0.74～0.76g/ml then.
The volume ratio of Virahol described in the step (1) and water is 1: 9.
Ovum crusta Gallus domesticus inner membrance described in the step (2) adopts the following steps preparation: put into hydrochloric acid soln after Ovum crusta Gallus domesticus is cleaned, after the dissolving of calcium shell, inner layer film comes off automatically, takes out, and cleans to get final product.
Described hydrochloric acid soln is the hydrochloric acid soln of massfraction 7-9%.
Compared with prior art, the present invention has the following advantages:
(1) present business-like gas sensitive has mixed catalyzer mostly, like precious metal, MOX etc., to improve sensitivity and to shorten response recovery time.The present invention has prepared pure mesh nano Indium sesquioxide, and White tin oxide and tin indium oxide have improved part sensitivity and shortened partial response time, do not carry out the doping of precious metals pt, Pd or other rare earth metals, help practicing thrift cost;
(2) occur in surperficial chemical transformation for Indium sesquioxide, tin class N-type semiconductor and relate to two kinds of principal reactions, airborne oxygen is captured electronics on the surface, becomes chemically adsorbing oxygen: O
2+ 2e → 2 (O
-) ads, the negative oxygen ion of ADSORPTION STATE is that surface electronic concentration reduces, the bill of material sheet conductance changes, again with gas generation respective change: R+ (O
-) ads → R (O) ads+e, the Web materials that the present invention makes helps obtaining big specific surface, more helps absorption, the diffusion of gas, and the transmission of electronics or negative oxygen ion is shifted, and shortens the time of response; Also help gas and detached rapidly, shorten time of recovery, make response safer and more effective;
(3) the present invention adopts simple inorganic salt as reactant respectively, has very strong versatility;
(4) product of the present invention's preparation has high electrochemical performance, can be used as the electrode materials of fuel cell, has vast potential for future development and application space;
(5) technology of the present invention is simple, and the product convenient processing is simple and direct, is suitable for medium scale development.
Description of drawings
Fig. 1 is the SEM photo of Ovum crusta Gallus domesticus inner membrance;
Fig. 2 prepares the SEM photo of product for embodiment 1;
Fig. 3 prepares the SEM photo of product for embodiment 2;
Fig. 4 prepares the SEM photo of product for embodiment 3;
Fig. 5 prepares the XRD figure of product for embodiment 1;
Fig. 6 prepares the XRD figure of product for embodiment 2;
Fig. 7 prepares the XRD figure of product for embodiment 3;
Sensitivity concentration curve when Fig. 8 prepares product to 200 ℃ of methane for embodiment 2;
Sensitivity temperature curve when Fig. 9 prepares product to methane concentration 10ppm for embodiment 2;
Sensitivity concentration curve when Figure 10 prepares product to 250 ℃ of methane for embodiment 3;
Sensitivity temperature curve when Figure 11 prepares product to methane concentration 10ppm for embodiment 3.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
A kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, and this method may further comprise the steps:
(1) preparation of egg inner layer film: Ovum crusta Gallus domesticus is cleaned, the film of outside is all taken off, shell is put into the hydrochloric acid soln that diluted, and after the dissolving of calcium shell, inner layer film comes off automatically, takes out, and cleans;
(2) preparation of mesh nano White tin oxide: with the ultrasonic concussion of Sn grain, the clean surface dust takes by weighing 1.4831g, adds the 5ml concentrated nitric acid, and the glass stick stirring and dissolving obtains Sn (NO
3)
4Strong solution all is transferred in the 25ml volumetric flask, adds the 2.5ml Virahol; Add the water constant volume, shake up, be configured to the solution of concentration 0.5mol/L, an amount of egg membrane is immersed 10h; Take out, dry 650 ℃ of calcinings naturally; The temperature rise rate of 3.5 ℃/s of control was calcined two hours, and naturally cooling promptly obtains mesh nano White tin oxide.
The SEM photo of common egg inner layer film is as shown in Figure 1, and the SEM photo of the mesh nano White tin oxide for preparing is as shown in Figure 2, and XRD figure is as shown in Figure 5.
A kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, and this method may further comprise the steps:
(1) preparation of egg inner layer film: Ovum crusta Gallus domesticus is cleaned, the film of outside is all taken off, shell is put into the hydrochloric acid soln that diluted, and after the dissolving of calcium shell, inner layer film comes off automatically, takes out, and cleans;
(2) preparation of mesh nanometer Indium sesquioxide: take by weighing 3.7603g In (NO
3)
3, solution transfer is gone in the 25ml volumetric flask, adds the 2.5ml Virahol, adds the water constant volume, shakes up; Be configured to the solution of concentration 0.5mol/L, an amount of egg membrane is immersed 10h, take out, dry naturally; 650 ℃ of calcinings, the temperature rise rate of 3.5 ℃/s of control was calcined naturally cooling two hours.
The SEM photo of the mesh nano Indium sesquioxide for preparing is as shown in Figure 3, and XRD figure is as shown in Figure 6.
A kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, and this method may further comprise the steps:
(1) preparation of egg inner layer film: Ovum crusta Gallus domesticus is cleaned, the film of outside is all taken off, shell is put into the hydrochloric acid soln that diluted, and after the dissolving of calcium shell, inner layer film comes off automatically, takes out, and cleans;
(2) preparation of mesh nanometer tin indium oxide: take by weighing the Sn grain of 1.4831g ultrasonic cleaning, add the 5ml concentrated nitric acid, the glass stick stirring and dissolving obtains Sn (NO
3)
4Solution takes by weighing 3.7603g In (NO
3)
3, dissolving is transferred in the 25ml volumetric flask, adds the 2.5ml Virahol, adds the water constant volume; Shake up, be configured to the solution of concentration 0.5mol/L, an amount of egg membrane is immersed 10h, take out, dry naturally; 650 ℃ of calcinings, the temperature rise rate of 3.5 ℃/s of control was calcined naturally cooling two hours.
The SEM photo of the mesh nano indium tin oxide target for preparing is as shown in Figure 4, and XRD figure is as shown in Figure 7.
With embodiment 1～3 and mixes with small amount of water, sonic oscillation 5min obtains mashed prod; Spread upon on a small quantity on the vitrified pipe that has platinum filament with the microsyringe absorption; 80 ℃ of oven dry are repeatedly smeared, are dried, and scribble uniform thin layer until the vitrified pipe surface; Be welded on the pedestal together with heater strip, be placed on aging 72h on the agingtable.Measure three kinds of materials then respectively to CO, CH
4, NH
3, H
2S, ethanol, toluene air-sensitive performance, sensitivity concentration curve under sensitivity temperature curve when drawing same concentration and the optimum temps.
Sensitivity temperature curve during sensitivity concentration curve and the concentration 10ppm of mesh nano Indium sesquioxide during to 200 ℃ of methane is respectively like Fig. 8 and shown in Figure 9.According to s=(Vg-Va)/Va, can know that the sensitivity of different concns is respectively 6.80,6.90,10.49,11.12,11.92 among Fig. 8, along with the increase of concentration, sensitivity also increases; Sensitivity among Fig. 9 during differing temps is respectively 6.89,7.67,8.10,16.17, and along with the rising of temperature, sensitivity increases.
Sensitivity temperature curve such as Figure 10 and shown in Figure 11 during sensitivity concentration curve and the concentration 10ppm of mesh nano tin indium oxide during to 250 ℃ of methane.According to s=(Vg-Va)/Va, can know that the sensitivity of different concns is respectively 7.29,10.20,28.06,41.79,41.00 among Figure 10, along with the increase of concentration, sensitivity increases earlier, after downtrending is arranged; Sensitivity among Figure 11 during differing temps is respectively 82.56,28.09,9.23, and along with the rising of temperature, sensitivity reduces.
A kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, and this method may further comprise the steps:
(1) the tin grain is gone out surface dirt through sonic oscillation, adding the concentrated nitric acid preparation then, to obtain concentration be 0.28g/ml, is placed on then in the volumetric flask, adds the Virahol of 1/10 liquor capacity, and adding water, to be settled to concentration be 0.5mol/L;
(2) Ovum crusta Gallus domesticus is cleaned, the film of outside is all taken off, it is 7% hydrochloric acid soln that shell is put into massfraction; After the dissolving of calcium shell, inner layer film comes off automatically, takes out afterwash; In the solution that step (1) makes, add the inner membrance of Ovum crusta Gallus domesticus then, take out behind the dipping 8h, dry naturally;
(3) will handle the Ovum crusta Gallus domesticus inner membrance that obtains through step (2) and place tube furnace, the control temperature rise rate is 3.5 ℃/s, is warming up to 650 ℃ of calcinings two hours, naturally cools to room temperature and gets final product.
A kind of is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, it is characterized in that this method may further comprise the steps:
(1) the tin grain is gone out surface dirt through sonic oscillation; Adding concentrated nitric acid preparation then, to obtain concentration be 0.3g/ml; To wherein adding indium nitrate, the concentration of control indium nitrate is 0.76g/ml, is placed in the volumetric flask then again; The Virahol that adds 1/10 liquor capacity, adding water, to be settled to concentration be 0.5mol/L;
(2) Ovum crusta Gallus domesticus is cleaned, the film of outside is all taken off, it is 9% hydrochloric acid soln that shell is put into massfraction; After the dissolving of calcium shell, inner layer film comes off automatically, takes out afterwash; In the solution that step (1) makes, add the inner membrance of Ovum crusta Gallus domesticus then, take out behind the dipping 10h, dry naturally;
(3) will handle the Ovum crusta Gallus domesticus inner membrance that obtains through step (2) and place tube furnace, 3.5 ℃/s of control temperature rise rate is warming up to 650 ℃ of calcining 2h, naturally cools to room temperature and gets final product.
Claims (7)
1. one kind is the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, it is characterized in that this method may further comprise the steps:
(1) metal nitrate is placed reactor drum, it is 0.5mol/L that adding Virahol and water are settled to concentration;
(2) inner membrance of adding Ovum crusta Gallus domesticus in the solution that step (1) makes takes out behind dipping 8～10h, dries naturally;
(3) will handle the Ovum crusta Gallus domesticus inner membrance that obtains through step (2) and place tube furnace, the control temperature rise rate is 3～4 ℃/s, is warming up to 640～660 ℃ of calcining 1～2h, naturally cools to room temperature and gets final product.
2. according to claim 1 a kind of be the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance; It is characterized in that; Metal nitrate described in the step (1) is the nitric acid solution of tin; Adopt following treating processes to obtain: the tin grain is gone out surface dirt through sonic oscillation, and adding the concentrated nitric acid preparation then, to obtain concentration be 0.28～0.3g/ml.
3. according to claim 1 a kind of be the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, it is characterized in that the metal nitrate described in the step (1) is an indium nitrate.
4. according to claim 1 a kind of be the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance; It is characterized in that; Metal nitrate described in the step (1) is the mixture of nitric acid solution of tin and indium nitrate, adopts following treating processes to obtain: the tin grain is gone out surface dirt through sonic oscillation, and adding the concentrated nitric acid preparation then, to obtain concentration be 0.28～0.3g/ml; To wherein adding indium nitrate, the concentration of control indium nitrate is 0.74～0.76g/ml then.
5. according to claim 1 a kind of be the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, it is characterized in that the volume ratio of Virahol described in the step (1) and water is 1: 9.
6. according to claim 1 a kind of be the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance; It is characterized in that; Ovum crusta Gallus domesticus inner membrance described in the step (2) adopts the following steps preparation: put into hydrochloric acid soln after Ovum crusta Gallus domesticus is cleaned, after the dissolving of calcium shell, inner layer film comes off automatically; Take out clean getting final product.
7. according to claim 6 a kind of be the method for the synthetic netted nano-metal-oxide of template with the Ovum crusta Gallus domesticus inner membrance, it is characterized in that described hydrochloric acid soln is the hydrochloric acid soln of massfraction 7-9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105448942A CN102464350A (en) | 2010-11-12 | 2010-11-12 | Method for synthesizing netty nanometer metal oxide by eggshell inner membrane as template |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105448942A CN102464350A (en) | 2010-11-12 | 2010-11-12 | Method for synthesizing netty nanometer metal oxide by eggshell inner membrane as template |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102464350A true CN102464350A (en) | 2012-05-23 |
Family
ID=46068518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105448942A Pending CN102464350A (en) | 2010-11-12 | 2010-11-12 | Method for synthesizing netty nanometer metal oxide by eggshell inner membrane as template |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102464350A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297318A (en) * | 2014-09-09 | 2015-01-21 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of network-structure nano-material for gas sensor |
| CN104591303A (en) * | 2014-12-10 | 2015-05-06 | 中国科学院宁波材料技术与工程研究所 | Micronano level metal oxide reticulate body and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896732A (en) * | 2006-06-22 | 2007-01-17 | 上海交通大学 | Production of tubing network-structured nano-stannic oxide gas-sensing material |
-
2010
- 2010-11-12 CN CN2010105448942A patent/CN102464350A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896732A (en) * | 2006-06-22 | 2007-01-17 | 上海交通大学 | Production of tubing network-structured nano-stannic oxide gas-sensing material |
Non-Patent Citations (4)
| Title |
|---|
| DONG YANG ET AL.: "Eggshell Membrane Templating of Hierarchically Ordered Macroporous Networks Composed of TiO2 Tubes", 《ADVANCED MATERIALS》, vol. 14, no. 21, 4 November 2002 (2002-11-04), pages 1543 - 1546 * |
| QUN DONG ET AL.: "Biogenic synthesis of tubular SnO2 with hierarchical intertextures by an aqueous technique involving glycoprotein", 《LANGMUIR》, vol. 23, no. 15, 20 June 2007 (2007-06-20), pages 8108 - 8113 * |
| 吴庆生等: "铜族硫化物半导体纳米晶的仿生合成及其光电性能", 《中国有色金属学报》, vol. 15, no. 2, 28 February 2005 (2005-02-28), pages 254 - 258 * |
| 房若宇等: "人工化石方法:制备复杂形貌纳米材料的捷径", 《材料工程》, no. 10, 31 December 2008 (2008-12-31), pages 191 - 196 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297318A (en) * | 2014-09-09 | 2015-01-21 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of network-structure nano-material for gas sensor |
| CN104591303A (en) * | 2014-12-10 | 2015-05-06 | 中国科学院宁波材料技术与工程研究所 | Micronano level metal oxide reticulate body and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Meng et al. | In-situ growth of ordered Pd-doped ZnO nanorod arrays on ceramic tube with enhanced trimethylamine sensing performance | |
| Lu et al. | UV-enhanced room temperature NO2 sensor using ZnO nanorods modified with SnO2 nanoparticles | |
| CN104003454A (en) | Porous cobalt oxide nanowire, and preparation method and application thereof | |
| CN106410229A (en) | Method for preparing loaded carbon-based anode catalysts for fuel batteries and application of loaded carbon-based anode catalysts | |
| CN103811775A (en) | Porous nano composite material for fuel cell oxygen reduction catalyst | |
| CN110201702A (en) | Carbon carries the nitrogenous compound oxygen reduction catalyst preparation method of monoatomic metal and gained catalyst | |
| CN106093140B (en) | For NO2The composite construction doped air-sensitive material of gas, gas sensor and preparation method thereof and application | |
| CN104118904A (en) | Preparation method and application of three-dimensional hollow multilevel-structured stannic oxide gas-sensitive material | |
| CN108663417A (en) | One kind being directed to low concentration of NO2The novel I n of gas2O3/Sb2O3Composite hollow nanotube gas sensitive | |
| CN106442642A (en) | Preparation method of zinc oxide/graphene composite material and resistance type gas sensor | |
| CN108445057A (en) | A kind of preparation and analysis method for detecting the electrochemical sensor of heavy metal ion | |
| CN107175090B (en) | Porous carbon solid phase micro-extraction coating and preparation method and application thereof | |
| Navale et al. | Low-temperature wet chemical synthesis strategy of In2O3 for selective detection of NO2 down to ppb levels | |
| CN104229871A (en) | Preparation method of flower type indium oxide gas-sensitive material with hierarchical structure | |
| Batra et al. | Micro-and nano-structured metal oxides based chemical sensors: an overview | |
| CN106914244A (en) | A kind of graphene-based metallic compound nano array material preparation and application | |
| CN108199053A (en) | A kind of preparation method of high efficiency, low cost oxygen reduction catalyst | |
| CN109507255A (en) | A kind of Preparation method and use of bismuth/carbonitride photoelectric material | |
| CN102464350A (en) | Method for synthesizing netty nanometer metal oxide by eggshell inner membrane as template | |
| CN102680537A (en) | Method for preparing high-selectivity stannic oxide/carbon nanometer tube gas sensor | |
| Xu et al. | Synthesis of ZnO/ZnCo2O4 hollow tube clusters by a template method for high-sensitive H2S sensor | |
| CN104297318A (en) | Preparation method of network-structure nano-material for gas sensor | |
| CN108303494B (en) | Vertical rod type atmospheric environment monitoring device | |
| CN116356561A (en) | Copper-based MOF nanofiber membrane and preparation method and application thereof | |
| CN103159255A (en) | Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application 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 | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120523 |