CN112666230A - Acetone sensor, preparation method and acetone detection method - Google Patents
Acetone sensor, preparation method and acetone detection method Download PDFInfo
- Publication number
- CN112666230A CN112666230A CN202011608939.8A CN202011608939A CN112666230A CN 112666230 A CN112666230 A CN 112666230A CN 202011608939 A CN202011608939 A CN 202011608939A CN 112666230 A CN112666230 A CN 112666230A
- Authority
- CN
- China
- Prior art keywords
- ceramic tube
- acetone
- sensor
- okra
- gas
- 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
Abstract
The invention belongs to the technical field of gas sensor preparation, and discloses an acetone sensor, a preparation method and an acetone detection method3O4A material; coating materials, assembling and welding according to the indirectly heated device process to finish the process based on okra-shaped Co3O4And (4) preparing the sensor. The invention successfully synthesizes Co by a one-step hydrothermal method3O4A gas sensitive material. The synthesis method is simple and the cost is low. The invention successfully realizes the construction of the hierarchical structure by a one-step hydrothermal method, taking ammonium fluoride as a structure directing agent and changing the composition of a solvent, and has simple synthesis method and low cost. The invention has excellent gas-sensitive characteristic, the sensitivity is 35.2, the optimal working temperature is 150 ℃, and the invention is realized under the environment of low temperature and high humidityAnd (3) effectively detecting acetone.
Description
Technical Field
The invention belongs to the technical field of gas sensor preparation, and particularly relates to an acetone sensor, a preparation method and an acetone detection method.
Background
At present: acetone (acetone, C)3H6O), also known as dimethyl ketone and xylon, are representative volatile organic compounds, colorless, transparent and having an aromatic odor. The method is widely used for organic synthesis raw materials, organic solvents, cleaning agents and the like in factories and laboratories. Acetone is highly toxic. When the acetone concentration is higher than 173ppm, the eyes, nose and central nervous system of a human may be damaged, resulting in dizziness and physical strength reduction. In addition, diabetes can be diagnosed by analyzing the acetone content in human breath. As a component of human exhaled breath, acetone has a concentration of up to 1800ppb in diabetic patients, which is much higher than the 300-900ppb concentrations in exhaled breath of healthy people. In view of the widespread existence and serious harm of acetone in life, it is very necessary to develop a high-performance gas sensor for detecting the influence of acetone concentration on human health.
Among many gas detection technologies, a semiconductor oxide gas sensor is a leading-edge hotspot of research because of its advantages of low power consumption, high sensitivity, good stability, easy integration, and the like. The P-type semiconductor oxide gas sensor has the advantages of low working temperature, high selectivity, high interference resistance and the like, and is favorable for further application of the gas sensor. Co3O4As a typical P-type sensitive material, the material has reduction-oxidation pair Co2+/Co3+And abundant adsorbed oxygen, which is beneficial to the application of the gas sensitive material. But due to the limitation of the self-conduction mechanism, the sensitivity is low, and the effective detection of the gas is difficult to realize. Therefore, to meet the practical application, Co is required to be used3O4The gas sensitive material is modified and researched, and the content of the modified gas sensitive material based on Co is further improved3O4Gas-sensitive properties of the sensor.
The construction of a hierarchical structure is beneficial to increasing the specific surface area of the product and improving the gas contentThe diffusion rate of the protons is another effective strategy to improve the performance of the gas sensor. In 2016, T.M.Li and colleagues successfully utilized a hydrothermal method to prepare SnO with a flower-like structure assembled by nanosheets2The response of the gas sensor based on this sample to 100ppm ethanol reached 37(T.M.Li, W.Zeng, H.W.Long, Z.C.Wang, Sens.actuators B.231(2016) 120-. However, the existing synthesis conditions of the hierarchical structure are generally controlled by regulating the content of the structure directing agent, the process is complex, and improvement is needed.
Through the above analysis, the problems and defects of the prior art are as follows: existing based on Co3O4The sensitivity of the sensor is low, and effective detection of gas is difficult to realize; the synthesis process of the hierarchical structure material is complex.
The difficulty in solving the above problems and defects is: how to do to Co3O4Gas sensitive material is modified to improve the content of Co3O4The sensitivity of the sensor; how to realize the construction of the flower-shaped structure by a simple process.
The significance of solving the problems and the defects is as follows: sensitivity is an important indicator of gas sensor performance. A gas sensor having low sensitivity cannot effectively realize detection of gas. Therefore, it is required to produce a gas sensor having high sensitivity. The hierarchical structure is beneficial to increasing the specific surface area of the product, improving the diffusion speed of gas molecules, providing a high-efficiency reaction field for the adsorption and oxidation reaction of gas, and further realizing the improvement of gas-sensitive performance. However, the synthesis process of the currently reported hierarchical structure is complex, is not beneficial to wide application, and needs to be improved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an acetone sensor, a preparation method and an acetone detection method.
The invention is realized in such a way that the preparation method of the acetone sensor comprises the following steps:
(1) cobalt nitrate is used as metal salt, ethanol/water mixed solution is used as solvent, ammonium fluoride is used as surfactant, and the one-step chemical hydrothermal method is adopted to successfully prepare the autumn catalystSunflower-like Co3O4A material;
(2) coating materials, assembling and welding according to the indirectly heated device process to finish the process based on okra-shaped Co3O4And (4) preparing the sensor.
Further, the content of the chemical reagents is 0.6-1.6 g of cobalt nitrate respectively; 15-33 mL of ethanol/water mixed solution; 0.5 to 3g of ammonium fluoride.
Further, the okra-like Co3O4The material specifically includes:
(1) dissolving cobalt nitrate and ammonium fluoride in a mixed solvent of ethanol/water, and continuously stirring at room temperature for 15-40 min to form a uniform solution;
(2) standing the uniform solution at room temperature for 24 h;
(3) and after the standing time is finished, removing the supernatant, and transferring the pink precipitate into a centrifugal tube. Alternately centrifuging the precipitate for multiple times by using ethanol and deionized water respectively at the centrifugation speed of 600-800 rpm;
(4) then drying the centrifugal product in an oven at the temperature of 60-80 ℃;
(5) and finally, calcining the dried product in a muffle furnace at 200-500 ℃ for 1-3 h to obtain Co3O4A material.
Further, the sensor preparation according to the indirectly heated device process specifically comprises:
(1) mixing okra-like Co3O4Grinding and mixing the material powder and deionized water to form pasty slurry;
(2) uniformly coating the ground paste slurry on the outer surface of a ceramic tube by using a pen brush to form a thick gas-sensitive material film, wherein the ceramic tube is provided with a pair of gold electrodes and four platinum lead wires;
(3) baking the coated ceramic tube, and putting the ceramic tube into a muffle furnace for calcination after the gas-sensitive material film is completely dried;
(4) taking out the calcined ceramic tube, and enabling a nickel-chromium heating coil with the resistance value of 28-50 k omega to penetrate through the ceramic tube to control the working temperature;
(5) welding and fixing the assembled ceramic tube by four platinum leadsIs fixed on a hexagonal base to finish the process based on okra-shaped Co3O4And (4) preparing the sensor.
Further, the mixing mode of the materials and the deionized water is specifically as follows: firstly, okra-shaped Co3O4Putting the material powder into a mortar, adding a proper amount of deionized water, grinding for 30s, and mixing to form pasty slurry; okra-like Co3O4The material powder and the deionized water are mixed according to the mass ratio of 2: 1-5: 1.
Further, uniformly coating the ground paste slurry on the outer surface of a ceramic tube by using a pen brush to form a gas-sensitive material film with the thickness of 8-20 microns, wherein the ceramic tube is provided with a pair of gold electrodes and four platinum leads; the ceramic tube has a length of 3.9 to 4.2mm, an inner diameter of 0.7 to 1.1 μm, and an outer diameter of 1.1 to 1.4 μm.
Further, baking the coated ceramic tube for 10-20 min, and after the gas sensitive material film is completely dried, putting the ceramic tube into a muffle furnace at 120-350 ℃ to calcine for 30-50 min.
The invention prepares and synthesizes the okra-shaped Co in the invention by adding chemicals according to the specific parameters3O4A material.
Another object of the present invention is to provide an acetone sensor prepared by the method for preparing an acetone sensor, the acetone sensor comprising: a platinum lead, a gold electrode, a ceramic tube, a gas-sensitive material film, a nickel-chromium alloy heating coil and a hexagonal base; the ceramic tube is fixed on the hexagonal base by welding, the ceramic tube is provided with a pair of gold electrodes and four Pt leads, the gas sensitive material film is uniformly coated on the outer surface of the ceramic tube, and the nichrome heating coil penetrates through the inner side of the ceramic tube.
The invention also aims to provide a method for detecting the n-butanol, which uses the acetone sensor.
Another object of the present invention is to provide an acetone detection method using the acetone sensor.
By combining all the technical schemes, the invention has the advantages and positive effects that: through the construction of the hierarchical structure,improve Co3O4The sensitivity of the gas sensor and the test result show that the okra-shaped Co-based gas sensor prepared by the method of the invention3O4The sensitivity of the sensor made of the material to 100ppm acetone gas at the optimal working temperature (150 ℃) is 35.2, and the effective detection of acetone can be realized. The invention successfully synthesizes Co by a one-step hydrothermal method3O4A gas sensitive material. The synthesis method is simple and the cost is low. The invention successfully realizes the construction of a hierarchical structure by a one-step hydrothermal method, taking ammonium fluoride as a structure directing agent and changing the composition (ethanol/water) of a solvent, and has the advantages of simple synthesis method and low cost.
The method successfully prepares the Co-shaped material based on okra3O4N-butanol sensor of the material. The gas sensor has excellent gas-sensitive property to acetone gas, the sensitivity is 35.2, the optimal working temperature is 150 ℃, and the effective detection of acetone in low-temperature and high-humidity environment can be realized. And the synthesis process is simple.
The invention prepares okra-shaped Co3O4Material parameter information: 0.6-1.6 g of cobalt nitrate; 15-33 mL of ethanol/water mixed solution; 0.5 to 3g of ammonium fluoride. Okra-like Co3O4The mass ratio of the material powder to the deionized water is 2: 1-5: 1, and the grinding time is 30 s. Under the experimental conditions, okra-like Co is completed3O4Material based on okra-like Co3O4Preparation of acetone sensor of material.
The okra-shaped Co is successfully prepared by the method3O4The material has good dispersibility and obvious flower-like structure. Okra-like Co-based prepared by the method of the invention3O4The acetone sensor made of the material has excellent sensing characteristics on acetone gas, the sensitivity is 35.2, the optimal working temperature is 150 ℃, and the acetone can be effectively detected in a low-temperature and high-humidity environment. The invention synthesizes okra-shaped Co with high catalytic activity, high specific surface area, easy-diffusion channels, multiple active sites and high carrier concentration by using a simple process (one-step hydrothermal method)3O4A material. Prepared by the invention based on autumnSunflower-like Co3O4The acetone sensor made of the material can realize effective detection of acetone at a low working temperature of 150 ℃, and the sensitivity is 35.2. The gas sensor device prepared by the invention is an indirectly heated device, and has low cost and small volume.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a flow chart of a method for manufacturing an acetone sensor according to an embodiment of the present invention.
FIG. 2 shows okra-like Co provided in an embodiment of the present invention3O4Scanning electron micrograph of material.
FIG. 3 shows okra-like Co provided by an embodiment of the present invention3O4X-ray diffraction pattern of the material.
FIG. 4 shows an example of the present invention based on okra-like Co3O4The response of an acetone sensor of the material to 100ppm acetone is plotted as a function of temperature.
FIG. 5 shows an example of the present invention based on okra-like Co3O4A schematic of the cyclic induction transient curve of an acetone sensor of material at the optimum operating temperature (150 ℃) for 100ppm acetone.
FIG. 6 shows an example of the present invention based on okra-like Co3O4The n-butanol sensor of the material has a radar plot of the response values to 100ppm of each gas at the optimum operating temperature (150 ℃).
FIG. 7 shows acetone gas Co provided by an embodiment of the present invention3O4The structure schematic diagram of the gas sensor;
in fig. 7: 1. a platinum lead wire; 2. a gold electrode; 3. a ceramic tube; 4. a gas sensitive material layer; 5. a nichrome heating coil; 6. a hexagonal base.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to solve the problems in the prior art, the invention provides an acetone sensor, a preparation method and an acetone detection method, and the invention is described in detail with reference to the accompanying drawings.
As shown in fig. 1, the preparation method of the acetone sensor provided by the invention comprises the following steps:
s101: cobalt nitrate is used as metal salt, ethanol/water mixed solution is used as solvent, ammonium fluoride is used as surfactant, and okra-shaped Co is synthesized by a one-step hydrothermal method3O4A material;
s102: coating materials, assembling and welding according to the indirectly heated device process to finish the process based on okra-shaped Co3O4And (4) preparing the sensor.
Okra-like Co of the invention3O4The content of the chemical reagents in the preparation process of the gas sensitive material is 0.6-1.6 g of cobalt nitrate respectively; 15-33 mL of ethanol/water mixed solution; 0.5 to 3g of ammonium fluoride.
The method for preparing the acetone sensor provided by the invention can be implemented by other steps by persons skilled in the art, and the method for preparing the acetone sensor provided by the invention in fig. 1 is only one specific example.
The invention embodiment provides okra-shaped Co3O4The specific preparation method of the material comprises the following steps:
(1) firstly, dissolving cobalt nitrate and ammonium fluoride in a mixed solvent of ethanol/water, and continuously stirring for 15-40 min at room temperature to form a uniform solution;
(2) standing the uniform solution at room temperature for 24 h;
(3) and after the standing time is finished, removing the supernatant, and transferring the pink precipitate into a centrifugal tube. Alternately centrifuging the precipitate for multiple times by using ethanol and deionized water respectively at the centrifugation speed of 600-800 rpm;
(4) then drying the centrifugal product in an oven at the temperature of 60-80 ℃;
(5) and finally, calcining the dried product in a muffle furnace at 200-500 ℃ for 1-3 h to obtain okra-shaped Co3O4A material.
The okra-like Co-based device is prepared according to the indirectly heated device process provided by the embodiment of the invention3O4The preparation method of the sensor specifically comprises the following steps:
(1) mixing okra-like Co3O4Grinding and mixing the material powder and deionized water to form pasty slurry;
(2) and taking a small amount of fully ground paste slurry, and uniformly coating the paste slurry on the outer surface of the ceramic tube by using a pen brush to form the gas-sensitive material film with the thickness of 8-20 microns. The ceramic tube has a pair of gold electrodes and four platinum leads. The length of the ceramic tube is 3.9-4.2 mm, the inner diameter is 0.7-1.1 μm, and the outer diameter is 1.1-1.4 μm;
(3) baking the coated ceramic tube for 10-20 min, and after the gas-sensitive material film is completely dried, putting the ceramic tube into a muffle furnace at 200-350 ℃ to calcine for 30-50 min;
(4) taking out the calcined ceramic tube, and enabling a nickel-chromium heating coil with the resistance value of 28-50 k omega to penetrate through the ceramic tube to control the working temperature;
(5) welding and fixing the assembled ceramic tube on a hexagonal base through four platinum leads to finish the process based on okra-shaped Co3O4And (4) preparing the sensor.
The grinding and mixing mode of the material and the deionized water is as follows: firstly, okra-shaped Co3O4Placing the material powder in a mortar, adding a proper amount of deionized water, grinding for 30s, and mixing to form pasty slurry. Okra-like Co3O4The mass ratio of the material powder to the deionized water is 2: 1-5: 1.
After testing, okra-like Co-based materials prepared by the method of the present invention3O4The n-butanol sensor of the material shows excellent sensing characteristics on the n-butanol gas, the sensitivity is 35.2, the optimal working temperature is 150 ℃, and the condition that the n-butanol gas exists in the environment with low temperature and high humidity can be realizedAnd (5) detecting the effect.
Based on okra-shaped Co in the invention3O4The working mechanism of the material acetone sensor is that when the prepared sensor is in different environments, the resistance value changes correspondingly. For example: when exposed to air, oxygen molecules absorb electrons from the material and adsorb on the surface of the material to form high-density holes, and the working resistance is low. When exposed to n-butanol, the adsorbed oxygen will react with the n-butanol molecules to produce CO2、H2O, free electrons, the released free electrons returning to the conduction band to form electron-hole pairs, resulting in a decrease in hole density and an increase in working resistance.
As shown in figure 7, the invention provides a food based on okra-shaped Co3O4The material acetone sensor device structure includes: platinum lead 1, gold electrode 2, ceramic tube 3, gas sensitive material film 4, nichrome heating coil 5, hexagonal base 6. The ceramic tube 3 is fixed on the hexagonal base 6 through welding, the ceramic tube 3 is provided with a pair of gold electrodes 2 and four Pt lead wires 1, the outer surface of the ceramic tube 3 is uniformly coated with a gas sensitive material film 4, and a nichrome heating coil 5 penetrates through the inner side of the ceramic tube 3.
The technical solution of the present invention is further described with reference to the following specific examples.
The preparation method of the nickel cobaltate gas sensor provided by the invention comprises the following steps:
(1) dissolving 0.6-1.6 g of cobalt nitrate and 0.5-3 g of ammonium fluoride in 15-33 mL of ethanol/water mixed solvent, and continuously stirring at room temperature for 15-40 min to form a uniform solution. The homogeneous solution was then allowed to stand at room temperature for 24 h. And after the standing time is finished, removing the supernatant, and transferring the pink precipitate into a centrifugal tube. The precipitate was centrifuged alternately with ethanol and deionized water several times at a centrifugation speed of 600-. And then drying the centrifugal product in an oven at the temperature of 60-80 ℃. And finally, calcining the dried product in a muffle furnace at 200-500 ℃ for 1-3 h to obtain okra-shaped Co3O4A material. The scanning picture is shown in figure 2.
(2) Mixing okra-like Co3O4Placing the powder in a mortar, and addingMeasuring deionized water, okra-like Co3O4Grinding and mixing the material powder and deionized water according to the mass ratio of 2: 1-5: 1 for 30s to form pasty slurry;
(3) and taking a small amount of fully ground paste slurry, and uniformly coating the paste slurry on the outer surface of the ceramic tube by using a pen brush to form the gas-sensitive material film with the thickness of 8-20 microns. The ceramic tube has a pair of gold electrodes and four platinum leads. The length of the ceramic tube is 3.9-4.2 mm, the inner diameter is 0.7-1.1 μm, and the outer diameter is 1.1-1.4 μm;
(4) baking the coated ceramic tube for 10-20 min, and after the gas-sensitive material film is completely dried, putting the ceramic tube into a muffle furnace at 120-350 ℃ for calcining for 30-50 min;
(5) taking out the calcined ceramic tube, and enabling a nickel-chromium heating coil with the resistance value of 28-50 k omega to penetrate through the ceramic tube to control the working temperature;
(6) and welding and fixing the assembled ceramic tube on the hexagonal base through four platinum leads to finish the preparation based on the okra-shaped sensor.
The technical effects of the present invention will be described in detail with reference to experiments.
FIG. 2 shows okra-like Co3O4The scanning electron micrograph of the material shows that the prepared okra-shaped Co3O4The material has good dispersibility and obvious hierarchical structure.
FIG. 3 shows okra-like Co3O4The X-ray diffraction pattern of the material shows that the main body of the prepared gas-sensitive material is Co3O4The corresponding standard card is PDF # 76-1802. After testing, okra-like Co-based materials prepared by the method of the present invention were found to be useful3O4The acetone sensor of the material exhibits excellent sensing characteristics for acetone gas. The test results are shown in fig. 4, 5 and 6.
FIG. 4 shows that the invention is based on okra-like Co3O4The response of the acetone sensor of the material to 100ppm acetone as a function of temperature is shown to be up to 35.2 at 150 c for 100ppm acetone.
FIG. 5 shows that the invention is based on okra-like Co3O4The acetone sensor made of the material circularly induces a transient curve to 100ppm acetone at 150 ℃, so that the sensor has good repeatability and is suitable for actual detection.
FIG. 6 shows that the invention is based on okra-like Co3O4The response value radar chart of the acetone sensor made of the material to various VOC gases of 100ppm at 150 ℃ can show that the sensor has good selectivity to acetone.
Okra-like Co preparation3O4Material parameter information: the content of the chemical reagents in the preparation process is 0.6-1.6 g of cobalt nitrate respectively; 15-33 mL of ethanol/water mixed solution; 0.5 to 3g of ammonium fluoride. Given preparation based on okra-like Co3O4Acetone sensor parameter information of material: okra-like Co3O4The mass ratio of the material powder to the deionized water is 2: 1-5: 1, and the grinding time is 30 s.
Through the experimental data, okra-like Co is completed3O4The material has good dispersibility and obvious flower-like structure. Based on the okra-shaped Co is completed through the experimental data3O4The prepared gas sensor shows excellent sensing characteristics on acetone gas, the sensitivity is 35.2, the optimal working temperature is 150 ℃, and the acetone can be effectively detected in a low-temperature and high-humidity environment.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A preparation method of an acetone sensor is characterized by comprising the following steps:
(1) cobalt nitrate is used as metal salt, ethanol/water mixed solution is used as solvent, ammonium fluoride is used as surfactant, and the okra-shaped Co is successfully prepared by a one-step chemical hydrothermal method3O4A material;
(2) coating materials, assembling and welding according to the indirectly heated device process to finish the process based on okra-shaped Co3O4And (4) preparing the sensor.
2. The method for preparing an acetone sensor according to claim 1, wherein the chemical reagents are each present in an amount of 0.6 to 1.6g of cobalt nitrate; 15-33 mL of ethanol/water mixed solution; 0.5 to 3g of ammonium fluoride.
3. The method of claim 1, wherein the okra-like Co is used as a Co sensor3O4The material specifically includes:
(1) dissolving cobalt nitrate and ammonium fluoride in a mixed solvent of ethanol/water, and continuously stirring at room temperature for 15-40 min to form a uniform solution;
(2) standing the uniform solution at room temperature for 24 h;
(3) after the standing time is over, removing the supernatant, transferring the pink precipitate into a centrifugal tube, and alternately centrifuging the precipitate for multiple times by using ethanol and deionized water respectively at the centrifugation speed of 600-;
(4) then drying the centrifugal product in an oven at the temperature of 60-80 ℃;
(5) and finally, calcining the dried product in a muffle furnace at 200-500 ℃ for 1-3 h to obtain Co3O4A material.
4. The method of claim 1, wherein the sensor fabrication according to the indirectly heated device process comprises:
(1) mixing okra-like Co3O4Grinding and mixing the material powder and deionized water to form pasty slurry;
(2) uniformly coating the ground paste slurry on the outer surface of a ceramic tube by using a pen brush to form a thick gas-sensitive material film, wherein the ceramic tube is provided with a pair of gold electrodes and four platinum lead wires;
(3) baking the coated ceramic tube, and putting the ceramic tube into a muffle furnace for calcination after the gas-sensitive material film is completely dried;
(4) taking out the calcined ceramic tube, and enabling a nickel-chromium heating coil with the resistance value of 28-50 k omega to penetrate through the ceramic tube to control the working temperature;
(5) welding and fixing the assembled ceramic tube on a hexagonal base through four platinum leads to finish the process based on okra-shaped Co3O4And (4) preparing the sensor.
5. The method for preparing an acetone sensor according to claim 4, wherein the mixing of the materials with deionized water is specifically: firstly, okra-shaped Co3O4Putting the material powder into a mortar, adding a proper amount of deionized water, grinding for 30s, and mixing to form pasty slurry; okra-like Co3O4The material powder and the deionized water are mixed according to the mass ratio of 2: 1-5: 1.
6. The method for preparing an acetone sensor as claimed in claim 4, wherein the ground paste is uniformly applied to the outer surface of a ceramic tube with a pair of gold electrodes and four platinum leads by a brush to form a gas-sensitive material film with a thickness of 8-20 μm; the ceramic tube has a length of 3.9 to 4.2mm, an inner diameter of 0.7 to 1.1 μm, and an outer diameter of 1.1 to 1.4 μm.
7. The preparation method of the acetone sensor as claimed in claim 4, wherein the coated ceramic tube is baked for 10-20 min, and after the gas sensitive material film is completely dried, the ceramic tube is placed in a muffle furnace at 120-350 ℃ and is calcined for 30-50 min.
8. An acetone sensor produced by the method for producing an acetone sensor according to any one of claims 1 to 7, comprising: a platinum lead, a gold electrode, a ceramic tube, a gas-sensitive material film, a nickel-chromium alloy heating coil and a hexagonal base; the ceramic tube is fixed on the hexagonal base by welding, the ceramic tube is provided with a pair of gold electrodes and four Pt leads, the gas sensitive material film is uniformly coated on the outer surface of the ceramic tube, and the nichrome heating coil penetrates through the inner side of the ceramic tube.
9. An acetone detection method using the acetone sensor according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011608939.8A CN112666230A (en) | 2020-12-29 | 2020-12-29 | Acetone sensor, preparation method and acetone detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011608939.8A CN112666230A (en) | 2020-12-29 | 2020-12-29 | Acetone sensor, preparation method and acetone detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112666230A true CN112666230A (en) | 2021-04-16 |
Family
ID=75410941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011608939.8A Pending CN112666230A (en) | 2020-12-29 | 2020-12-29 | Acetone sensor, preparation method and acetone detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112666230A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447557A (en) * | 2021-05-27 | 2021-09-28 | 西安电子科技大学芜湖研究院 | Based on hollow six mango star Co3O4Methanol sensor made of material, preparation method and application |
| CN113740391A (en) * | 2021-09-26 | 2021-12-03 | 河北工业大学 | MOF-derived NiO-Co3O4Preparation method of acetone gas sensor |
| CN113899790A (en) * | 2021-08-30 | 2022-01-07 | 西安电子科技大学 | Acetone sensor, preparation method and application |
| CN114384125A (en) * | 2021-12-12 | 2022-04-22 | 西安电子科技大学 | Acetone sensor, preparation method and application |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713915A (en) * | 2015-03-18 | 2015-06-17 | 华中科技大学 | High-performance gas sensor based on laminated structure and preparation method for high-performance gas sensor |
| CN106093163A (en) * | 2016-05-27 | 2016-11-09 | 吉林大学 | La0.8sr0.2coO3ceO for sensitive electrode2base blendes together electric potential type acetone sensor, preparation method and applications |
| CN109775765A (en) * | 2019-02-22 | 2019-05-21 | 中国科学院山西煤炭化学研究所 | A kind of Co3O4Electrode material and preparation method thereof |
| CN110006958A (en) * | 2019-04-10 | 2019-07-12 | 河北工业大学 | Co3O4The preparation method of ZnO nano material acetone thick film gas-sensitive sensor |
-
2020
- 2020-12-29 CN CN202011608939.8A patent/CN112666230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713915A (en) * | 2015-03-18 | 2015-06-17 | 华中科技大学 | High-performance gas sensor based on laminated structure and preparation method for high-performance gas sensor |
| CN106093163A (en) * | 2016-05-27 | 2016-11-09 | 吉林大学 | La0.8sr0.2coO3ceO for sensitive electrode2base blendes together electric potential type acetone sensor, preparation method and applications |
| CN109775765A (en) * | 2019-02-22 | 2019-05-21 | 中国科学院山西煤炭化学研究所 | A kind of Co3O4Electrode material and preparation method thereof |
| CN110006958A (en) * | 2019-04-10 | 2019-07-12 | 河北工业大学 | Co3O4The preparation method of ZnO nano material acetone thick film gas-sensitive sensor |
Non-Patent Citations (5)
| Title |
|---|
| TINGTING ZHOU等: ""P-type CO3O4 nanomaterials-based gas sensor：Preparation and acetone sensing performance", 《SENSORS AND ACTUATORS B: CHEMICAL》 * |
| ZIYUE ZHANG等: ""Controllable synthesis of Co3O4 crossed nanosheet arrays toward an acetone gas sensor"", 《SENSORS AND ACTUATORS B: CHEMICAL》 * |
| 汤丹蕾等: ""EDTA辅助合成Co3O4纳米材料及其气敏性能"", 《无机材料学报》 * |
| 王杏等: "《纳米二氧化钛的生产与应用》", 31 December 2014 * |
| 王莹麟: ""基于介孔结构氧化物半导体的气体传感器研究"", 《中国博士学位论文全文数据库》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447557A (en) * | 2021-05-27 | 2021-09-28 | 西安电子科技大学芜湖研究院 | Based on hollow six mango star Co3O4Methanol sensor made of material, preparation method and application |
| CN113899790A (en) * | 2021-08-30 | 2022-01-07 | 西安电子科技大学 | Acetone sensor, preparation method and application |
| CN113740391A (en) * | 2021-09-26 | 2021-12-03 | 河北工业大学 | MOF-derived NiO-Co3O4Preparation method of acetone gas sensor |
| CN113740391B (en) * | 2021-09-26 | 2023-12-05 | 河北工业大学 | MOF-derived NiO-Co 3 O 4 Preparation method of acetone gas sensor |
| CN114384125A (en) * | 2021-12-12 | 2022-04-22 | 西安电子科技大学 | Acetone sensor, preparation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112666230A (en) | Acetone sensor, preparation method and acetone detection method | |
| He et al. | 3D ordered macroporous SmCoO3 perovskite for highly active and selective hydrogen peroxide detection | |
| Ma et al. | Metal–organic framework-derived yolk–shell hollow Ni/NiO@ C microspheres for bifunctional non-enzymatic glucose and hydrogen peroxide biosensors | |
| CN108717072A (en) | A kind of light activated formaldehyde gas sensor and its preparation process | |
| Liu et al. | Sub-ppm YSZ-based mixed potential type acetone sensor utilizing columbite type composite oxide sensing electrode | |
| CN109107358B (en) | Cerium oxide/copper oxide heterojunction composite oxide and preparation method and application thereof | |
| CN108732214A (en) | Based on PdO@In2O3The acetone gas sensor and preparation method thereof of compound nano sensitive material | |
| Bai et al. | Enhanced gas sensing performance based on the PtCu octahedral alloy nanocrystals decorated SnO2 nanoclusters | |
| CN111573744B (en) | Nickel cobaltate gas-sensitive material, nickel cobaltate gas-sensitive sensor and preparation method thereof | |
| Li et al. | A novel mixed-potential type NH3 sensor based on Ag nanoparticles decorated AgNbO3 sensing electrode synthesized by demixing method | |
| CN106872545B (en) | A kind of arachnoid composite material, and preparation method thereof and the application in terms of biosensor | |
| CN109342534B (en) | Oxygen vacancy dominated CuO/ZnFe based2O4Xylene gas sensor of core-shell structure microsphere and preparation method thereof | |
| Wang et al. | Potentiometric ammonia sensor with InVO4 sensing electrode | |
| Wang et al. | A nonenzymatic glucose sensing platform based on Ni nanowire modified electrode | |
| CN109613100A (en) | Based on three-dimensional opal structural SnO2The acetone gas sensor and preparation method thereof of-ZnO compound nano sensitive material | |
| CN105929005A (en) | Mixed-potential low-ppm acetone sensor based on YSZ and MNb2O6 sensitive electrode, and preparation method and application thereof | |
| Yang et al. | CO response characteristics of NiFe2O4 sensing material at elevated temperature | |
| CN108107100A (en) | With Sm2-xSrxNi2O4Acetone sensor, preparation method and applications for sensitive electrode material | |
| Zhao et al. | Au144 loaded hierarchical In2O3 nanospheres for effective detection of acetone in simulated exhalation | |
| CN109521064B (en) | Room temperature NO2 sensor based on WO3 hollow sphere and preparation method thereof | |
| CN113960122A (en) | Three-dimensional SnO2/Co3O4Core-shell nano composite material and humidity-resistant acetone gas-sensitive element prepared from same | |
| CN110361434B (en) | Zinc oxide/molybdenum sulfide film sensitive to extremely low-concentration acetone | |
| CN113899790A (en) | Acetone sensor, preparation method and application | |
| CN113433174A (en) | Ethanol sensor based on ZnO porous structure microsphere sensitive material, preparation method and application thereof | |
| CN114813854A (en) | Acetone sensor, preparation method and detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210416 |