CN115259156A - Capable of detecting low concentration NO at room temperature2Gas sensitive element and preparation method thereof - Google Patents
Capable of detecting low concentration NO at room temperature2Gas sensitive element and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a method for detecting low-concentration NO at room temperature2The gas sensitive component and the preparation method thereof. The preparation method comprises the following steps: (1) Multilayer Ti3C2Synthesizing MXene; (2) TiO 22/Ti3C2Synthesizing; (3) TiO 22‑x/Ti3C2Synthesizing; and (4) manufacturing the gas sensitive component. The invention aims to solve the problem of poor gas sensitivity of the existing MXene-based material, the preparation method is simple and convenient in process and low in cost, and the TiO prepared by the method is2‑x/Ti3C2TiO in composite material2Has a {001} crystal face with special high energy and high activity and rich oxygen vacancy, andthe composite material has Schottky heterostructure and can react with 10ppm NO at room temperature2Response (Δ R/R)a) Respectively up to 4.6, which is far more than the prior MXene-based gas-sensitive material. Furthermore, tiO2‑x/Ti3C2And also has good cycle response. The invention provides an effective method for constructing the MOS/MXene gas sensitive material with a special crystal face and rich oxygen vacancies, and further promotes the development of the gas sensitive technology.
Description
Technical Field
The invention relates to a preparation method of a gas sensitive material in the field of gas concentration detection, in particular to a method for detecting low-concentration NO at room temperature2The preparation method of the gas sensitive material, the preparation method of the corresponding gas sensitive component by using the gas sensitive material, the gas sensitive component prepared by using the preparation method of the gas sensitive component, and the room temperature detection of NO by using the gas sensitive component packaged by using2Gas sensor for detecting NO by using gas sensitive element or room temperature2Gas sensor for detecting low concentration NO at room temperature2The method of (1).
Background
The growing environmental pollution caused by the massive use of fossil fuels has always plagued human beings and has become a major problem in the world, due to the development of chemical and automotive industries. The emission of a large amount of greenhouse gases can cause global warming of the atmosphere, and great threat is caused to the environment. The harmful gases mainly discharged by the combustion of coal and petroleum products also bring serious smog to the earth. Air pollution factors therefore require extensive human attention, rapid analysis, effective control and proper treatment. Among various air pollution gases, nitrogen dioxide (NO)2) Is one of the typical byproducts of fossil fuel combustion and automobile exhaust emissions. NO (nitric oxide)2Is a volatile and irritating noxious odor, which causes not only photochemical smog and acid rain, but also respiratory diseases such as bronchitis and pulmonary edema, which may lead to death in severe cases. Therefore, development of low-cost, highly sensitive NO2Gas sensor materials are very important and critical.
Disclosure of Invention
The invention aims at the existing TiO2High working temperature of gas sensitive material and Ti3C2The technical problem of low response of gas sensitive material, namely detecting low-concentration NO at room temperature2The preparation method of the gas sensitive material, the preparation method of the corresponding gas sensitive component by using the gas sensitive material, the gas sensitive component prepared by using the preparation method of the gas sensitive component, and the room temperature detection of NO by using the gas sensitive component packaged by using the room temperature detection of NO2Gas sensor for detecting NO by using gas sensitive element or room temperature2Gas sensor for detecting low concentration NO at room temperature2The method of (4).
The invention is realized by adopting the following technical scheme: low-concentration NO can be detected at room temperature2The gas sensitive material comprises a plurality of layers of Ti3C2MXene, the preparation method of the gas sensitive material comprises the following steps:
(1) Synthesis of multilayer Ti3C2MXene: with 1gTi3AlC2Pulverizing at a ratio of 15mLHF to Ti3AlC2Uniformly dispersing the powder in HF, stirring at 35 ℃, cleaning and drying to obtain multilayer Ti3C2MXene。
As a further modification of the above protocol, mechanical stirring was carried out at 35 ℃ for 4h.
As a further improvement of the above scheme, the gas sensitive material further comprises TiO2/Ti3C2The preparation method of the composite material further comprises the following steps:
(2) Synthesis of TiO2/Ti3C2The composite material is as follows: with 0.3g of multi-layer Ti3C2MXene powder: 0.5g NaBF43.87mL HCl, and mixing multiple layers of Ti3C2MXene powder was slowly added to deionized water to form a suspension, and NaBF was added4And HCl are added into the suspension, stirred and then transferred into a polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ to obtain TiO2/Ti3C2A composite material.
Preferably, the mixture is stirred for 1h and then transferred into a polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ for 12h.
Preferably, the gas-sensitive material further comprises TiO2-x/Ti3C2The preparation method of the composite material further comprises the following steps:
(3) Synthesis of TiO2-x/Ti3C2The composite material comprises the following components: adding TiO into the mixture2/Ti3C2Powder at flow-dried Ar +10%2Annealing under atmosphere, with the heating rate of 10 ℃ min-1Annealing at 400 ℃ to obtain TiO2-x/Ti3C2A composite material.
Still more preferably, tiO is added2/Ti3C2Powder was placed in a tube furnace, dried by flow Ar +10%2Annealing for 2h under the atmosphere.
The present invention also provides a method for detecting low concentration NO at room temperature2The preparation method of the gas sensitive component comprises the following steps:
in a plurality of layers of Ti3C2MXene、TiO2/Ti3C2Composite material and TiO2-x/Ti3C2Selecting one composite material from the composite materials; wherein any of the above can be used to detect low concentration NO at room temperature2The gas-sensitive material of (2) is prepared into a multilayer Ti3C2MXene, with any of the above capable of detecting low concentration NO at room temperature2TiO prepared by the method for preparing the gas-sensitive material2/Ti3C2Composite material using any of the above capable of detecting low concentration NO at room temperature2TiO prepared by the preparation method of the gas sensitive material2-x/Ti3C2A composite material;
dispersing the selected composite material in ethanol according to the proportion of 0.05g of the selected composite material to 0.1mL of ethanol, dripping the selected composite material on a Pt interdigital electrode on an alumina substrate, and drying to obtain the gas sensitive component of the corresponding composite material.
The invention also provides a method for detecting low-concentration NO at room temperature2The gas sensitive component of (1) is capable of detecting low at room temperatureConcentration of NO2The multilayer Ti prepared by the method for preparing the gas sensitive component3C2MXene gas sensitive element or TiO2/Ti3C2Gas sensitive element, or TiO2-x/Ti3C2And a gas sensitive component.
The invention also provides a method for detecting NO at room temperature2A gas sensor capable of detecting low concentration NO at room temperature using the above2The gas sensitive element of (1) is packaged.
The invention also provides a method for detecting low-concentration NO at room temperature2The detection method of (3), comprising the steps of:
using the above method, low concentration NO can be detected at room temperature2Gas sensitive component of (2) or the above room temperature detection of NO2Gas sensor, controlling room temperature at 25 + -2 deg.C, exposing substrate coated with gas-sensitive material to NO2Then introducing air, and recording the resistance R of the coated substrate exposed to the gasgAnd resistance R in aira；
According to the resistance RgAnd a resistance RaCalculating the gas response resistance: r = (R)g-Ra)/Ra。
Compared with the prior gas sensitive material, the invention has the advantages that (1) TiO2The {001} crystal face has high surface energy and reaction active energy and can provide more active oxygen adsorption sites; (2) The unpaired electrons generated by oxygen vacancies and unsaturated coordination atoms can become the gathering centers of electrons, and an effective channel is provided for the transfer of electrons from the composite material to adsorbed gas molecules, so that the NO ratio is improved2The sensitivity of (c); (3) TiO 22-x/Ti3C2The schottky heterojunction between them helps to accelerate charge transfer and separation.
The method comprises the following specific steps:
(1) For example, the literature, "J.Choi, et al, in situ formation of multiple Schottky barriers In a Ti3C2MXene film and its application in high purity sensitive gas sensors, adv.Funct.Mater.30 (2020) 20039982Modified Ti3C2A single piece of paper,for 0.5 and 5ppm NO at room temperature2Responses of approximately 0.05 and 0.16 were obtained, respectively. Compared with the present invention, except for the material of the matrix (single layer of Ti)3C2MXene) in situ grown TiO2The shapes are different, no special crystal face is provided, and rich oxygen vacancy is not formed.
(2) For example, the literature, "H.L.Tai, et al, enhanced ammonia response of Ti3C2Txnanosheets supported by TiO2nanoparticles at room temperature, sens. Initiators B chem.298 (2019) 126872Spraying the solution on the interdigital electrode, and then coating a single layer of Ti3C2Spray coating on TiO2Preparing TiO on the film2/Ti3C2The result of the double-layer film shows that the double-layer film has a response value of 0.03 to 10ppm of ammonia gas at room temperature. Compared with the present invention, except for the material of the matrix (single layer of Ti)3C2MXene) and different preparation methods, the obtained materials are different (not TiO)2/Ti3C2Composite material but a two-layer film), and sprayed TiO2Has no special crystal face and oxygen vacancy.
(3) For example, the literature, "T.T.He, et al, MXene/SnO2"by laminating Ti layers in layers with Ti nanoparticles chemical gas sensors, sens3C2Hydrothermal growth of SnO on MXene2MXene/SnO prepared by particles2The composite had a response of 0.02 to 0.5ppm ammonia at room temperature. Compared with the invention, in addition to loading different metal oxides, snO thereof2Nor have abundant oxygen vacancies.
In conclusion, the present invention compares with the above documents, in addition to the difference of the matrix material, the multilayer Ti is formed by hydrothermal method3C2Flake TiO with {001} crystal face is formed on MXene in situ2And subsequent annealing to form TiO2Has rich oxygen vacancy. Anatase TiO2The {001} crystal face has higher surface energy and reactivity than other surfaces, so that more active oxygen adsorption sites are available, and unpaired electrons and unsaturated coordination generated by oxygen vacanciesThe atoms may also provide more active sites for absorption of the target gas, whereas TiO provides2And can be used with metallic base material Ti3C2The Schottky heterojunction is formed, and the electron transmission can be accelerated by the synergistic effect, so that the NO ratio is improved2So that it can be sensitive to ppb-level NO at room temperature2And (6) detecting. This is not available in the above-mentioned documents.
Drawings
FIG. 1 shows the detection of low concentration NO at room temperature as provided in example 1 of the present invention2The flow chart of the detection method of (1).
FIG. 2 is a schematic view of Ti used in FIG. 13C2，TiO2/Ti3C2And high sensitivity room temperature detection of NO2Of TiO (2)2-x/Ti3C2Scanning electron microscope photograph of the surface of the composite material.
FIG. 3 shows Ti used in FIG. 13C2，TiO2/Ti3C2And high sensitivity room temperature detection of NO2Of TiO 22-x/Ti3C2X-ray diffraction images of the composite.
FIG. 4 shows Ti used in FIG. 13C2，TiO2/Ti3C2And high sensitivity room temperature detection of NO2Of TiO 22-x/Ti3C2Composite material pair 10ppmNO2The response curve of time.
FIG. 5 is a diagram of the highly sensitive room temperature detection of NO used in FIG. 12Of TiO (2)2-x/Ti3C2EPR curve of composite.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Example 1:
refer to FIG. 1, which illustrates an embodiment of the present invention for detecting low concentration NO at room temperature2The flow chart of the detection method of (1). The detection of low concentration NO at room temperature2The detection method comprises the following steps:
using a device capable of detecting low concentrations of NO at room temperature2Gas sensitive component or room temperature detection of NO2Gas sensor, controlling room temperature at 25 + -2 deg.C, exposing substrate coated with gas-sensitive material to NO2Then introducing air, and recording the resistance R of the coated substrate exposed to the gasgAnd resistance R in aira；
According to the resistance RgAnd a resistance RaCalculating the gas response resistance: r = (R)g-Ra)/Ra。
Wherein the NO is detected at room temperature in the step2The gas sensor can be formed by packaging the gas sensitive component. The gas sensitive element can be used for detecting low-concentration NO at room temperature2The multilayer Ti prepared by the method for preparing the gas sensitive element3C2MXene gas sensitive element or TiO2/Ti3C2Gas sensitive element, or TiO2-x/Ti3C2And a gas sensor.
The method can detect low concentration NO at room temperature2The preparation method of the gas sensitive component can comprise the following steps:
in a plurality of layers of Ti3C2MXene、TiO2/Ti3C2Composite material, tiO2-x/Ti3C2Selecting one composite material from the composite materials; wherein the method employs a method capable of detecting low concentration NO at room temperature2Preparation method of the gas sensitive material3C2MXene, using a reagent capable of detecting low concentrations of NO at room temperature2TiO prepared by the preparation method of the gas sensitive material2/Ti3C2Composite material using a low concentration of NO detectable at room temperature2TiO prepared by the method for preparing the gas-sensitive material2-x/Ti3C2A composite material;
dispersing the selected composite material in ethanol according to the proportion of 0.05g of the selected composite material to 0.1mL of ethanol, dripping the selected composite material on a Pt interdigital electrode on an alumina substrate, and drying to obtain the gas-sensitive component of the corresponding composite material.
Wherein said detection of low concentration NO is capable of being performed at room temperature2The gas-sensitive material of (1), which may include a plurality of layers of Ti3C2 MXene、TiO2/Ti3C2Composite material and TiO2-x/Ti3C2A composite material.
The preparation method of the gas sensitive material comprises the following steps:
(1) Synthesis of multilayer Ti3C2MXene: with 1gTi3AlC2Pulverizing at a ratio of 15mLHF to Ti3AlC2Uniformly dispersing the powder in HF, stirring at 35 ℃, cleaning and drying to obtain multilayer Ti3C2MXene. Wherein, the mechanical stirring is carried out for 4 hours at 35 ℃.
Ti due to good conductivity and abundant functional groups generated by HF etching3C2MXene is commonly used to make room temperature gas sensitive materials. Ti3C2MXene has a signal-to-noise ratio higher than that of other two-dimensional materials (such as reduced graphene oxide, black phosphorus and MoS)2) 2 orders of magnitude higher. Further, ti3C2The experimental and theoretical limits of MXene detection of VOC gases at room temperature are also lowest compared to other two-dimensional materials. And Ti3C2MXene can also serve as a base material for anchoring the MOS to enhance the sensing performance.
(2) Synthesis of TiO2/Ti3C2The composite material is as follows: with 0.3g of multi-layered Ti3C2MXene powder: 0.5g NaBF43.87mL HCl, and mixing multiple layers of Ti3C2MXene powder was slowly added to deionized water to form a suspension, and NaBF was added4And HCl are added into the suspension, stirred and then transferred into a polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ to obtain TiO2/Ti3C2A composite material. Wherein, the mixture is stirred for 1 hour and then is transferred into a polytetrafluoroethylene autoclave for hydrothermal treatment for 12 hours at 160 ℃.
(3) Synthesis of TiO2-x/Ti3C2The composite material comprises the following components: adding TiO into the mixture2/Ti3C2Powder in fluidized drying Ar +10%2Annealing under atmosphere with a heating rate of 10 ℃ min-1Annealing at 400 ℃ to obtain TiO2-x/Ti3C2A composite material. Wherein, tiO is added2/Ti3C2Powder was placed in a tube furnace, dried by flow Ar +10%2Annealing for 1h under the atmosphere.
Example 2:
(1) Multilayer Ti3C2Synthesis of MXene: 1g of Ti3AlC2Uniformly dispersing the powder in 15mLHF, mechanically stirring for 4h at 35 ℃, cleaning and drying to obtain multilayer Ti3C2 MXene；
(2) Manufacturing a gas sensitive component: to prepare Ti3C2Gas sensitive element, 0.05gTi3C2Dispersing the powder in 0.1mL ethanol, dripping on Pt interdigital electrode on alumina substrate, drying, and recording the response and recovery of gas sensitive material to target gas with dynamic four-channel gas sensitive test system (SD 101)Complex character. The test temperature was controlled at 25. + -. 2 ℃ and the gas sensitive material coated substrate was exposed to NO2Then air is introduced, and the resistance (R) of the coated substrate exposed to the gas is recordedg) And resistance (R) in aira). The gas response is given by the formula R = (R)g-Ra)/RaAnd (4) calculating.
To analyze Ti3C2The morphology and properties of (A) as shown in region a in FIG. 2, ti3C2The powder has a unique accordion multilayer structure and fig. 3 also shows Ti3C2XRD characteristic curve of (a). As shown in region a of FIG. 4, ti3C2For 10ppm NO2The response of (c) was 0.16.
Example 3:
(1) Multilayer Ti3C2Synthesis of MXene: mixing 1g of Ti3AlC2Uniformly dispersing the powder in 15mL of HF, mechanically stirring for 4 hours at 35 ℃, cleaning and drying to obtain multilayer Ti3C2 MXene；
(2)TiO2/Ti3C2The synthesis of (2): 0.3g of a multi-layer Ti3C2The powder was slowly added to deionized water and 0.5g NaBF was added4And 3.87mL of HCl are added into the suspension, stirred for 1h and then transferred into a 100mL polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ for 12h to obtain TiO2/Ti3C2；
(3) Manufacturing a gas sensitive component: for the preparation of TiO2/Ti3C2Gas sensitive element prepared by mixing 0.05g of TiO2/Ti3C2The composite material is dispersed in 0.1mL of ethanol, dropped on a Pt interdigital electrode on an alumina substrate, and dried, and then a dynamic four-channel gas-sensitive test system (SD 101) is used for recording the response and recovery characteristics of the gas-sensitive material to target gas. The test temperature was controlled at 25. + -. 2 ℃ and the gas sensitive material coated substrate was exposed to NO2Then air is introduced to record the resistance (R) of the coated substrate exposed to the gasg) And resistance (R) in aira). The gas response is given by the formula R = (R)g-Ra)/RaAnd (4) calculating.
For analysis of TiO2/Ti3C2In multiple layers of Ti, as shown by the region b in FIG. 23C2Uniformly growing flaky TiO2Particle, and XRD as in FIG. 3 also shows TiO2Forming of (3). TiO, shown as region b in FIG. 42/Ti3C2For 10ppm NO2Has a response of 2.6 and has good cyclability.
Example 4:
(1) Multilayer Ti3C2Synthesis of MXene: mixing 1g of Ti3AlC2Uniformly dispersing the powder in 15mL HF, mechanically stirring for 4h at 35 ℃, and cleaning and drying to obtain multilayer Ti3C2 MXene；
(2)TiO2/Ti3C2The synthesis of (2): 0.3g of a plurality of layers of Ti3C2The powder was slowly added to deionized water and 0.5g NaBF was added4And 3.87mL of HCl are added into the suspension, stirred for 1h and then transferred into a 100mL polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ for 12h to obtain TiO2/Ti3C2；
(3)TiO2-x/Ti3C2Synthesis: mixing TiO with2/Ti3C2Powder was placed in a tube furnace, dried by flow Ar +10%2Annealing for 1h under atmosphere, wherein the heating rate is 10 ℃ min-1Annealing at 400 ℃ to obtain TiO2-x/Ti3C2A composite material;
(4) Manufacturing a gas sensitive component: to prepare TiO2-x/Ti3C2Gas sensitive element prepared by mixing 0.05g of TiO2-x/Ti3C2The composite material is dispersed in 0.1mL of ethanol, dropped on a Pt interdigital electrode on an alumina substrate, and dried, and then a dynamic four-channel gas-sensitive test system (SD 101) is used for recording the response and recovery characteristics of the gas-sensitive material to target gas. The test temperature was controlled at 25. + -. 2 ℃ and the gas sensitive material coated substrate was exposed to NO2Then air is introduced to record the resistance (R) of the coated substrate exposed to the gasg) And resistance in air (R)a). The gas response is given by the formula R = (R)g-Ra)/RaAnd (4) calculating.
For analysis of TiO2-x/Ti3C2Morphology and properties of (2), as shown by the region c in FIG. 2, tiO2-x/Ti3C2Morphology and TiO2/Ti3C2Similarly. As shown in FIG. 5, for TiO2-x/Ti3C2Analysis of the EPR spectrum of (D) can show that TiO2-x/Ti3C2A clear paramagnetic signal occurred at g =1.9878, indicating TiO2-x/Ti3C2There are abundant oxygen vacancies. TiO, as shown in region c in FIG. 42-x/Ti3C2For 10ppm NO2The response of (D) is 4.6, indicating TiO2-x/Ti3C2At room temperature to NO2With a highly sensitive response.
In combination with the above examples 2, 3 and 4, it can be seen that: the invention relates to the detection of NO at room temperature2The field of gas sensor technology, in particular for NO at room temperature2The high-efficiency detection of (2). The preparation method comprises the following steps: (1) Multilayer Ti3C2Synthesizing MXene; (2) TiO 22/Ti3C2Synthesizing; (3) TiO 22-x/Ti3C2Synthesizing; and (4) manufacturing the gas sensitive component. The invention aims to solve the problem of poor gas sensitivity of the existing MXene-based material, the preparation method is simple and convenient in process and low in cost, and the TiO prepared by the method is2-x/Ti3C2TiO in the composite material2Has special high-energy high-activity {001} crystal face and rich oxygen vacancy, and the composite material has a Schottky heterostructure and can react with 10ppmNO at room temperature2Response (Δ R/R)a) Respectively up to 4.6, which is far more than the prior MXene-based gas-sensitive material. In addition, tiO2-x/Ti3C2And also has good cyclic response. The invention provides an effective method for constructing the MOS/MXene gas sensitive material with a special crystal face and rich oxygen vacancies, and further promotes the development of the gas sensitive technology.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. Low-concentration NO can be detected at room temperature2The preparation method of the gas sensitive material is characterized by comprising the following steps: the gas-sensitive material comprises a plurality of layers of Ti3C2MXene, the preparation method of the gas sensitive material comprises the following steps:
(1) Synthesis of multilayer Ti3C2MXene: with 1gTi3AlC2Pulverizing at a ratio of 15mLHF to Ti3AlC2Uniformly dispersing the powder in HF, stirring at 35 ℃, cleaning and drying to obtain multilayer Ti3C2MXene。
2. The method of claim 1 capable of detecting low concentrations of NO at room temperature2The method for preparing a gas sensitive material of (1), characterized in that it is mechanically stirred at 35 ℃ for 4 hours.
3. The method of claim 1, capable of detecting low concentrations of NO at room temperature2The preparation method of the gas sensitive material is characterized in that the gas sensitive material also comprises TiO2/Ti3C2The preparation method of the composite material further comprises the following steps:
(2) Synthesis of TiO2/Ti3C2The composite material is as follows: with 0.3g of multi-layer Ti3C2MXene powder: 0.5g NaBF43.87mL HCl, and mixing multiple layers of Ti3C2MXene powderSlowly adding into deionized water to form suspension, and adding NaBF4And HCl are added into the suspension, stirred and then transferred into a polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ to obtain TiO2/Ti3C2A composite material.
4. The method of claim 3, capable of detecting low concentrations of NO at room temperature2The preparation method of the gas-sensitive material is characterized in that the gas-sensitive material is stirred for 1 hour and then is transferred into a polytetrafluoroethylene autoclave for hydrothermal treatment at 160 ℃ for 12 hours.
5. The method of claim 3, capable of detecting low concentrations of NO at room temperature2The gas-sensitive material of (1), characterized in that the gas-sensitive material further comprises TiO2-x/Ti3C2The preparation method of the composite material further comprises the following steps:
(3) Synthesis of TiO2-x/Ti3C2The composite material is as follows: adding TiO into the mixture2/Ti3C2Powder in fluidized drying Ar +10%2Annealing under atmosphere with a heating rate of 10 ℃ min-1Annealing at 400 ℃ to obtain TiO2-x/Ti3C2A composite material.
6. The method of claim 5, wherein the low concentration of NO can be detected at room temperature2The method for preparing a gas sensitive material of (1), wherein TiO is added2/Ti3C2Powder was placed in a tube furnace, dried by flow Ar +10%2Annealing for 2h under the atmosphere.
7. Low-concentration NO can be detected at room temperature2The preparation method of the gas sensitive component is characterized by comprising the following steps:
in a plurality of layers of Ti3C2MXene、TiO2/Ti3C2Composite material, tiO2-x/Ti3C2Selecting one composite material from the composite materials; wherein, as defined in claim 1 or 2, is adoptedCapable of detecting low concentration NO at room temperature2The gas-sensitive material of (2) is prepared into a multilayer Ti3C2MXene capable of detecting low concentrations of NO at room temperature using the method of claim 3 or 42TiO prepared by the method for preparing the gas-sensitive material2/Ti3C2Composite material capable of detecting low concentration of NO at room temperature using the method of claim 5 or 62TiO prepared by the method for preparing the gas-sensitive material2-x/Ti3C2A composite material;
dispersing the selected composite material in ethanol according to the proportion of 0.05g of the selected composite material to 0.1mL of ethanol, dripping the selected composite material on a Pt interdigital electrode on an alumina substrate, and drying to obtain the gas sensitive component of the corresponding composite material.
8. Low-concentration NO can be detected at room temperature2The gas sensor according to claim 7, wherein the gas sensor is capable of detecting low concentration NO at room temperature2The multilayer Ti prepared by the method for preparing the gas sensitive element3C2MXene gas sensitive element or TiO2/Ti3C2Gas sensitive element, or TiO2-x/Ti3C2And a gas sensitive component.
9. Room temperature detection NO2Gas sensor, characterized in that it is a gas sensor capable of detecting low concentrations of NO at room temperature using the method according to claim 82The gas sensitive component is packaged.
10. Detection of low-concentration NO at room temperature2The detection method of (2), characterized in that it comprises the following steps:
use of the reagent according to claim 8 for detecting low concentrations of NO at room temperature2Gas sensitive component or room temperature detecting NO as claimed in claim 92Gas sensor, controlling room temperature at 25 + -2 deg.C, exposing substrate coated with gas-sensitive material to NO2Then introducing air to record the exposure of the coated substrate to gasResistance R ofgAnd resistance R in aira；
According to the resistance RgAnd a resistance RaCalculating the gas response resistance: r = (R)g-Ra)/Ra。
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| CN117705896A (en) * | 2024-02-04 | 2024-03-15 | 西安电子科技大学 | Flexible NO 2 Preparation method of gas sensor and sensor |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502421A (en) * | 2014-12-16 | 2015-04-08 | 电子科技大学 | Room-temperature P-N-P heterostructure hydrogen sensor and preparation method thereof |
| US20160123944A1 (en) * | 2013-06-05 | 2016-05-05 | Institute of Microelectronics, Chinese Academy of Sciences | Method for manufacturing no2 gas sensor for detection at room temperature |
| CN106979943A (en) * | 2017-05-27 | 2017-07-25 | 武汉大学 | High-sensitivity surface strengthens the preparation method of Raman scattering substrate |
| WO2020186335A1 (en) * | 2019-03-18 | 2020-09-24 | Canary Health Technologies Inc. | Biomarkers for systems, methods, and devices for detecting and identifying substances in a subject's breath, and diagnosing and treating health conditions |
| CN112229879A (en) * | 2020-10-21 | 2021-01-15 | 重庆大学 | TiO2-Ti3C2TxComposite film gas sensor and preparation method and application thereof |
| CN112557457A (en) * | 2020-11-03 | 2021-03-26 | 扬州大学 | Planar flexible room temperature gas sensor based on printable nanocomposite |
| WO2021076236A2 (en) * | 2019-08-26 | 2021-04-22 | Drexel University | Mxenes for selective adsorption of desired chemical analytes and method thereof |
| CN112763551A (en) * | 2020-12-29 | 2021-05-07 | 电子科技大学 | Nitrogen dioxide sensor based on composite material blocking effect and preparation method thereof |
| CN112903763A (en) * | 2021-03-01 | 2021-06-04 | 中国石油大学(华东) | Ti3C2TxPreparation method of ammonia-based gas sensor and sensing application of ammonia-based gas sensor under assistance of light |
| CN112939053A (en) * | 2021-01-29 | 2021-06-11 | 浙江大学 | Method for preparing transition metal oxide material containing oxygen vacancy |
| CN113912121A (en) * | 2021-10-09 | 2022-01-11 | 上海理工大学 | Preparation method of molybdenum trioxide composite titanium dioxide or titanium carbide nano material and preparation method of gas sensitive element |
| CN114314649A (en) * | 2021-12-29 | 2022-04-12 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of Pd modified oxygen vacancy titanium oxide composite material, product and application thereof |
| US20230124633A1 (en) * | 2020-04-10 | 2023-04-20 | China Petroleum & Chemical Corporation | Self-heating gas sensor, gas-sensitive material, preparation method for same, and applications thereof |
-
2022
- 2022-07-18 CN CN202210843912.XA patent/CN115259156B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160123944A1 (en) * | 2013-06-05 | 2016-05-05 | Institute of Microelectronics, Chinese Academy of Sciences | Method for manufacturing no2 gas sensor for detection at room temperature |
| CN104502421A (en) * | 2014-12-16 | 2015-04-08 | 电子科技大学 | Room-temperature P-N-P heterostructure hydrogen sensor and preparation method thereof |
| CN106979943A (en) * | 2017-05-27 | 2017-07-25 | 武汉大学 | High-sensitivity surface strengthens the preparation method of Raman scattering substrate |
| WO2020186335A1 (en) * | 2019-03-18 | 2020-09-24 | Canary Health Technologies Inc. | Biomarkers for systems, methods, and devices for detecting and identifying substances in a subject's breath, and diagnosing and treating health conditions |
| WO2021076236A2 (en) * | 2019-08-26 | 2021-04-22 | Drexel University | Mxenes for selective adsorption of desired chemical analytes and method thereof |
| US20230124633A1 (en) * | 2020-04-10 | 2023-04-20 | China Petroleum & Chemical Corporation | Self-heating gas sensor, gas-sensitive material, preparation method for same, and applications thereof |
| CN112229879A (en) * | 2020-10-21 | 2021-01-15 | 重庆大学 | TiO2-Ti3C2TxComposite film gas sensor and preparation method and application thereof |
| CN112557457A (en) * | 2020-11-03 | 2021-03-26 | 扬州大学 | Planar flexible room temperature gas sensor based on printable nanocomposite |
| CN112763551A (en) * | 2020-12-29 | 2021-05-07 | 电子科技大学 | Nitrogen dioxide sensor based on composite material blocking effect and preparation method thereof |
| CN112939053A (en) * | 2021-01-29 | 2021-06-11 | 浙江大学 | Method for preparing transition metal oxide material containing oxygen vacancy |
| CN112903763A (en) * | 2021-03-01 | 2021-06-04 | 中国石油大学(华东) | Ti3C2TxPreparation method of ammonia-based gas sensor and sensing application of ammonia-based gas sensor under assistance of light |
| CN113912121A (en) * | 2021-10-09 | 2022-01-11 | 上海理工大学 | Preparation method of molybdenum trioxide composite titanium dioxide or titanium carbide nano material and preparation method of gas sensitive element |
| CN114314649A (en) * | 2021-12-29 | 2022-04-12 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of Pd modified oxygen vacancy titanium oxide composite material, product and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 吕品: "基于界面调控的TiO2-x@C材料 对分子氧的活化作用研", 中国优秀硕士学位论文 工程科技Ι辑, pages 1 - 76 * |
| 许明;孙以材;潘国峰;张翼飞;何建建;: "TiO_2薄膜制备及其气敏特性", 传感器世界, no. 02 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117705896A (en) * | 2024-02-04 | 2024-03-15 | 西安电子科技大学 | Flexible NO 2 Preparation method of gas sensor and sensor |
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