CN108828026A - A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature - Google Patents
A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature Download PDFInfo
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- CN108828026A CN108828026A CN201810662675.0A CN201810662675A CN108828026A CN 108828026 A CN108828026 A CN 108828026A CN 201810662675 A CN201810662675 A CN 201810662675A CN 108828026 A CN108828026 A CN 108828026A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
Abstract
A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature, is related to a kind of detection NO2The preparation method of gas sensor.It is to solve existing SnO2Semiconductor N O2Sensing material is unable to satisfy highly sensitive, highly selective detection NO at room temperature2The problem of.Method：One, the preparation of ethylenediamine graphite alkene；Two, SnO2The preparation of/ethylenediamine graphite alkene composite material；Three, SnO2The preparation of/ethylenediamine graphite alkene composite sensing film.The sensor of this method preparation is to NO2With excellent selectivity, and improve to NO2The sensitivity of gas.The present invention is used for gas detection technology field.
Description
Technical field
The present invention relates to a kind of detection NO2The preparation method of gas sensor.
Background technique
Nitrogen dioxide (NO2) it is a kind of toxic air pollutants, only 5ppmNO2Lung will be damaged or even cause lesion,
One of it or acid rain, the main reason of photochemical fog.NO2Main source be industrial production and motor vehicle exhaust emission,
In NO2When Concentration Testing, there is a large amount of interference gas in environment, can seriously affect detection accuracy and accuracy.Therefore, real
Existing highly selective, highly sensitive NO2Gas detection is most important to human health and environmental protection.
SnO2Semiconductor material is widely used as sensitive material because of the advantages that its is at low cost, stability is good to prepare NO2Gas
Dependent sensor.But such resistive memory sensor, because its operating temperature is high (more than 200 DEG C), poor selectivity, sensitivity
Low disadvantage, using being restricted.Graphene because it has the characteristics that highly conductive ability, high carrier mobility, in recent years by
It is widely used in and semiconductors coupling, so that the operating temperature of semiconductor transducer be greatly lowered, realizes room temperature NO2Detection.But
It is SnO2/ graphene is as room temperature NO2Sensing material compares pure SnO2, selectivity is not fully improved, and sensitivity mentions
It rises and is also extremely limited.
Summary of the invention
The present invention is to solve existing SnO2Semiconductor N O2Sensing material is unable to satisfy highly sensitive, highly selective inspection at room temperature
Survey NO2The problem of, a kind of preparation method of highly sensitive detection nitrogen dioxide gas sensor of room temperature is provided.
The preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature of the present invention, includes the following steps：
One, the preparation of ethylenediamine graphite alkene：
Graphene oxide is prepared with Hummer ' s method, graphene oxide is configured to graphene oxide water solution, to oxidation
Ethylenediamine and distilled water are added in graphene aqueous solution, wherein the volume ratio of graphene oxide water solution, ethylenediamine and distilled water
It is 6:1:(13-15), stirs evenly, and the reaction 8~for 24 hours at 80-95 DEG C, to after reaction, with distilled water centrifuge washing
Then product is dispersed in distilled water by product again, be configured to ethylenediamine graphite aqueous solution；
The graphene oxide water solution concentration is 2.5-3.5mg/mL；The concentration of ethylenediamine graphite aqueous solution is
0.8-1.2mg/mL；
Two, SnO2The preparation of/ethylenediamine graphite alkene composite material：
Stannic chloride pentahydrate is dissolved in water, and the ethylenediamine graphite aqueous solution and dense salt of step 1 preparation is added
2-3h is stirred at room temperature in acid, obtains mixed solution, and mixed solution is placed in water heating kettle, reacts 12- at 110-130 DEG C
48h；Product is successively cleaned with water and ethanol solution to neutrality, then product is re-dispersed into ethanol solution, is obtained
SnO2The ethanol solution of/ethylenediamine graphite alkene composite material；
Wherein the quality of stannic chloride pentahydrate and the volume ratio of water are 0.35g：(33-36) mL, stannic chloride pentahydrate and second
The mass ratio of diamines graphite alkene is 1：(0.0011-0.0034), the quality of stannic chloride pentahydrate and the volume ratio of concentrated hydrochloric acid are
0.35g：(1.5-2.5) mL, SnO2The concentration of the ethanol solution of/ethylenediamine graphite alkene composite material is 37.5-150mg/mL；
Three, SnO2The preparation of/ethylenediamine graphite alkene composite sensing film：
Step 2 is obtained into SnO2The ethanol solution of/ethylenediamine graphite alkene composite material is in a manner of drop coating or spin coating
On potsherd coated in the interdigital electrode with silver-colored palladium, repetitive coatings 4-20 times later, then in an oven at 60-65 DEG C
Dry -72h for 24 hours, obtains SnO2The NO of/ethylenediamine graphite alkene composite material2Gas sensor.
Further, graphene oxide is configured to graphene oxide water solution using ultrasonic wave added method in step 1.
Further, it is used distilled water centrifuge washing product 5 times or more in step 1.
Beneficial effects of the present invention：
The present invention is by by SnO2It is compound with ethylenediamine graphite alkene, prepare NO2Sensor.On the one hand graphene is utilized
Strong conductive capability realizes that room temperature detects NO2, on the one hand using ethylenediamine group to NO2Adsorption capacity, to improve to NO2Choosing
Selecting property and sensitivity.
The present invention carries out ethylenediamine functional modification to graphene, and modifying upper ethylenediamine group on the surface of graphene can be promoted
To NO2The selectivity and sensitivity of gas, concrete reason are：First, the N atom on group contains lone pair electrons, is electronics richness
Collect region, can be used as NO2Adsorption site, improve to NO2Selectivity；Second, ethylenediamine group is as electron-donating group, meeting
The hole concentration for reducing graphene surface rises its resistance, then adsorbs NO2Afterwards, ethylenediamine group can as adsorption site
To adsorb more NO2, decline ethylenediamine graphite alkene resistance, so that the resistance ratio variation of absorption front and back is bigger, thus
It improves to NO2The sensitivity of gas.
NO of the reduced graphene to 500ppm2Multiplying power be only 1.05, and ethylenediamine graphite alkene is to 5ppm NO2Multiplying power
Up to 1.52.This shows ethylenediamine graphite alkene to NO2Air-sensitive performance significantly promoted really.
SnO of the present invention2/ ethylenediamine graphite alkene is at room temperature to 5ppmNO2Response multiplying power reach 5.22, and the prior art
Middle SnO2With graphene it is compound after to 5ppmNO2Response multiplying power but less than 3.
The present invention is to SnO2/ ethylenediamine graphite alkene is in 0.25-5ppmNO2In range, to NO2Response multiplying power degree and gas
Bulk concentration is in a linear relationship, y=0.799x+1.098, R2=0.988.This shows to realize by the data relationship measured to NO2
Quantitative detection.And detected value can be down to 0.25ppm, and general sensor detection range is higher than 1ppm.
Detailed description of the invention
Fig. 1 is that the atom of ethylenediamine graphite alkene in embodiment 1 is tried hard to；
Fig. 2 is the infrared figure of ethylenediamine graphite alkene in embodiment 1；
Fig. 3 is SnO in embodiment 12The transmission electron microscope picture of/ethylenediamine graphite alkene；
Fig. 4 is ethylenediamine graphite alkene in embodiment 1 at room temperature to NO2Response curve；
Fig. 5 is SnO in embodiment 12/ ethylenediamine graphite alkene is at room temperature to the dynamic of the follow-on test of 0.25-5ppm
Response curve；
Fig. 6 is SnO in embodiment 12/ ethylenediamine graphite alkene is at room temperature to the linear of the follow-on test of 0.25-5ppm
Matched curve；
Fig. 7 is SnO in embodiment 62The gas-selectively figure of/ethylenediamine graphite alkene.
Specific embodiment
The technical solution of the present invention is not limited to the following list, further includes between each specific embodiment
Any combination.
Specific embodiment one：The preparation method of the highly sensitive detection nitrogen dioxide gas sensor of present embodiment room temperature,
Include the following steps：
One, the preparation of ethylenediamine graphite alkene：
Graphene oxide is configured to graphene oxide water solution, ethylenediamine and steaming are added into graphene oxide water solution
Distilled water, wherein the volume ratio of graphene oxide water solution, ethylenediamine and distilled water is 6:1:(13-15), stirs evenly, and
At 80-95 DEG C reaction 8~for 24 hours, to after reaction, with distilled water centrifuge washing product, then product be dispersed in steaming again
In distilled water, it is configured to ethylenediamine graphite aqueous solution；
The graphene oxide water solution concentration is 2.5-3.5mg/mL；The concentration of ethylenediamine graphite aqueous solution is
0.8-1.2mg/mL；
Two, SnO2The preparation of/ethylenediamine graphite alkene composite material：
Stannic chloride pentahydrate is dissolved in water, and the ethylenediamine graphite aqueous solution and dense salt of step 1 preparation is added
2-3h is stirred at room temperature in acid, obtains mixed solution, and mixed solution is placed in water heating kettle, reacts 12- at 110-130 DEG C
48h；Product is successively cleaned with water and ethanol solution to neutrality, then product is re-dispersed into ethanol solution, is obtained
SnO2The ethanol solution of/ethylenediamine graphite alkene composite material；
Wherein the quality of stannic chloride pentahydrate and the volume ratio of water are 0.35g：(33-36) mL, stannic chloride pentahydrate and second
The mass ratio of diamines graphite alkene is 1：(0.0011-0.0034), the quality of stannic chloride pentahydrate and the volume ratio of concentrated hydrochloric acid are
0.35g：(1.5-2.5) mL, SnO2The concentration of the ethanol solution of/ethylenediamine graphite alkene composite material is 37.5-150mg/mL；
Three, SnO2The preparation of/ethylenediamine graphite alkene composite sensing film：
Step 2 is obtained into SnO2The ethanol solution of/ethylenediamine graphite alkene composite material is in a manner of drop coating or spin coating
On potsherd coated in the interdigital electrode with silver-colored palladium, repetitive coatings 4-20 times later, then in an oven at 60-65 DEG C
Dry -72h for 24 hours, obtains SnO2The NO of/ethylenediamine graphite alkene composite material2Gas sensor.
Specific embodiment two：The present embodiment is different from the first embodiment in that：Graphene oxide in step 1
It is to be prepared with Hummer ' s method.It is other same as the specific embodiment one.
Specific embodiment three：The present embodiment is different from the first and the second embodiment in that：Using super in step 1
Graphene oxide is configured to graphene oxide water solution by sound householder method.It is other the same as one or two specific embodiments.
Specific embodiment four：Unlike one of present embodiment and specific embodiment one to three：It is used in step 1
Distilled water centrifuge washing product 5 times or more.It is other identical as one of specific embodiment one to three.
Specific embodiment five：Unlike one of present embodiment and specific embodiment one to four：Oxygen in step 1
Graphite aqueous solution concentration is 2.3~3.3mg/mL.It is other identical as one of specific embodiment one to four.
Specific embodiment six：Unlike one of present embodiment and specific embodiment one to five：Second in step 1
The concentration of diamines graphite aqueous solution is 0.9~1.1mg/mL.It is other identical as one of specific embodiment one to five.
Specific embodiment seven：Unlike one of present embodiment and specific embodiment one to six：In step 2
SnO2The concentration of the ethanol solution of/ethylenediamine graphite alkene composite material is 50~100mg/mL.Other and specific embodiment
One of one to six is identical.
Specific embodiment eight：Unlike one of present embodiment and specific embodiment one to seven：Five in step 2
The mass ratio of water tin tetrachloride and ethylenediamine graphite alkene is 1：0.002~0.003.It is other with specific embodiment one to seven it
One is identical.
Specific embodiment nine：Unlike one of present embodiment and specific embodiment one to eight：It is dense in step 2
The mass concentration of hydrochloric acid is 37%~37.5%.It is other identical as one of specific embodiment one to eight.
Specific embodiment ten：Unlike one of present embodiment and specific embodiment one to eight：It is dense in step 2
The mass concentration of hydrochloric acid is 37%.It is other identical as one of specific embodiment one to eight.
Elaborate below to the embodiment of the present invention, following embodiment under the premise of the technical scheme of the present invention into
Row is implemented, and gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following realities
Apply example.
Embodiment 1：
The preparation method of the highly sensitive detection nitrogen dioxide gas sensor of the present embodiment room temperature, includes the following steps：
One, the preparation of ethylenediamine graphite alkene：
Graphene oxide is prepared with Hummer ' s method, graphene oxide is configured to 3mg/mL's using ultrasonic wave added method
30mL graphene oxide water solution, 5mL ethylenediamine and 70mL are added into the three-necked bottle of 250mL for graphene oxide water solution
Distilled water stirs evenly, and reacts for 24 hours at 95 DEG C.To after reaction, with distilled water centrifuge washing product 5 times or more, so
Product is dispersed in distilled water again afterwards, is configured to the ethylenediamine graphite aqueous solution of 1mg/mL.
Two, SnO2The preparation of/ethylenediamine graphite alkene composite material：
Using hydro-thermal method one-step synthesis SnO2/ ethylenediamine graphite alkene composite material, specifically by 0.35g stannic chloride pentahydrate
For in dissolution of raw material in water 35mL water, and be added the 0.8mL of step 1 preparation ethylenediamine graphite aqueous solution and 2mL it is dense
The mixture is stirred at room temperature 2h, obtains mixed solution by hydrochloric acid.Mixed solution is placed in 50mL water heating kettle, at 120 DEG C
Lower reaction is for 24 hours.By the product of acquisition 1 time wash with distilled water, then cleaned with ethanol solution to solution neutral, then by product
Again disperse in 2mL ethanol solution, obtain SnO2The ethanol solution of/ethylenediamine graphite alkene composite material.
Three, SnO2The preparation of/ethylenediamine graphite alkene composite sensing film：
10 μ L step 2 are taken to obtain SnO2The ethanol solution of/ethylenediamine graphite alkene composite material, by solution drop coating in band
Have on the potsherd (7mm × 14mm) of the interdigital electrode of silver-colored palladium, repetitive coatings 4 times, it is then dry at 60 DEG C in an oven
72h obtains SnO2The NO of/ethylenediamine graphite alkene composite material2Gas sensor.Air-sensitive performance test is then carried out, in room temperature
Under, it is passed through the NO of 0.25-5ppm2。
Fig. 1 is that the atom of the ethylenediamine graphite alkene in the present embodiment is tried hard to.The figure shows the ethylenediamine graphite of synthesis
Alkene is lamellar structure, is single-layer graphene with a thickness of 0.81nm.
Fig. 2 is the infrared figure of ethylenediamine graphite alkene.The figure shows ethylenediamine graphite alkene compared to graphene oxide
Spectrogram, 1737cm-1The characteristic peak of carboxyl disappears, emerging 1639cm-1Amide I band characteristic peak, this illustrate ethylenediamine with
Condensation acylation reaction occurs for the carboxyl on graphene oxide.In addition to this, 2927cm-1And 2856cm-1Belong to the flexible vibration of C-H
It is dynamic.Prove that ethylenediamine graphite alkene is successfully prepared.
Fig. 3 is SnO2The transmission electron microscope picture of/ethylenediamine graphite alkene.The figure shows the SnO being prepared2Be pattern be ball
Shape particle, particle size are uniformly distributed in graphene surface probably in 3-5nm or so, and the two is well combined.
Fig. 4 is ethylenediamine graphite alkene at room temperature to NO2Response curve.It was found from the figure that the ethylenediamine being prepared
NO of the graphite alkene to 5ppm2Multiplying power can reach 1.52, and reduced graphene is to the NO of 500ppm2Its multiplying power is only 1.05.
By comparison it can be found that ethylenediamine graphite alkene is to NO2Air-sensitive performance significantly promoted really.
Fig. 5 is SnO2/ ethylenediamine graphite alkene is at room temperature to the dynamic response curve of the follow-on test of 0.25-5ppm.
It was found from the figure that composite material rises with concentration in response to multiplying power and risen in follow-on test, and recoverability is good, meets
The demand continuously detected.
Fig. 6 is SnO2/ ethylenediamine graphite alkene is at room temperature to the linear fit curve of the follow-on test of 0.25-5ppm.
It was found from the figure that the two is in linear relation within the scope of 0.25-5ppm, y=0.799x+1.098, R2=0.988.This shows
In measurement process, we can detect NO according to the data relationship measured2The concentration of gas has practical application value,
Quantitative detection may be implemented.
Embodiment 2：
The present embodiment difference from example 1 is that：The temperature reacted in step 1 is 80 DEG C.Other steps and ginseng
Number is same as Example 1.
Embodiment 3：
The present embodiment difference from example 1 is that：The 1mg/ml ethylenediamine graphite alkene water being added in step 2
Solution is 1.2ml, and the mass ratio of stannic chloride pentahydrate and ethylenediamine graphite alkene is 1：0.0034.Other steps and parameter and reality
It is identical to apply example 1.
Embodiment 4：
The present embodiment difference from example 1 is that：Disperse 4ml again after solution in step 2 after centrifuge washing
In ethanol solution.Other steps and parameter are same as Example 1.
Embodiment 5：
The present embodiment difference from example 1 is that：10 μ l solution are taken all to apply in step 3 in a manner of spin coating
It overlays on the potsherd (7mm × 14mm) with silver-colored palladium interdigital electrode, then repetitive coatings 20 times.Other steps and parameter and reality
It is identical to apply example 1.
Embodiment 6：
The present embodiment difference from example 1 is that：Step 3 is when carrying out air-sensitive performance test, the gas that is passed through
For 5ppmNO2, 5ppmH2S, 100ppmNH3, 100ppmCH4, 100ppmCO.Other steps and parameter are same as Example 1.
Fig. 7 is SnO in embodiment 62The gas-selectively figure of/ethylenediamine graphite alkene.It was found that material is to 5ppm NO2Sound
Answering multiplying power is up to 5.22, and to same concentration H2The multiplying power of S is 1.57, then the NH of 100ppm3、CO、CH4Multiplying power be even more
Only 1.22,1.02,1.28, this represents material to NO2With excellent selectivity, this good characteristic can make to sense
Device is applied in more complicated gaseous environment, and the sensing characteristics of material are unaffected, and can function well as detection NO2's
Effect.
Claims (9)
1. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature, it is characterised in that this method includes following
Step：
One, the preparation of ethylenediamine graphite alkene：
Graphene oxide is configured to graphene oxide water solution, ethylenediamine and distillation are added into graphene oxide water solution
Water, wherein the volume ratio of graphene oxide water solution, ethylenediamine and distilled water is 6:1:(13-15), stirs evenly, and in 80-
At 95 DEG C reaction 8~for 24 hours, to after reaction, with distilled water centrifuge washing product, product is then dispersed in distilled water again
In, it is configured to ethylenediamine graphite aqueous solution；
The graphene oxide water solution concentration is 2.5-3.5mg/mL；The concentration of ethylenediamine graphite aqueous solution is 0.8-
1.2mg/mL；
Two, SnO2The preparation of/ethylenediamine graphite alkene composite material：
Stannic chloride pentahydrate is dissolved in water, and the ethylenediamine graphite aqueous solution and concentrated hydrochloric acid of step 1 preparation is added,
2-3h is stirred at room temperature, obtains mixed solution, mixed solution is placed in water heating kettle, reacts 12-48h at 110-130 DEG C；
Product is successively cleaned with water and ethanol solution to neutrality, then product is re-dispersed into ethanol solution, obtains SnO2/ second
The ethanol solution of diamines graphite alkene composite material；
Wherein the quality of stannic chloride pentahydrate and the volume ratio of water are 0.35g：(33-36) mL, stannic chloride pentahydrate and ethylenediamine
The mass ratio of graphite alkene is 1：(0.0011-0.0034), the quality of stannic chloride pentahydrate and the volume ratio of concentrated hydrochloric acid are
0.35g：(1.5-2.5) mL, SnO2The concentration of the ethanol solution of/ethylenediamine graphite alkene composite material is 37.5-150mg/mL；
Three, SnO2The preparation of/ethylenediamine graphite alkene composite sensing film：
Step 2 is obtained into SnO2The ethanol solution of/ethylenediamine graphite alkene composite material is coated in a manner of drop coating or spin coating
On the potsherd of the interdigital electrode with silver-colored palladium, repetitive coatings 4-20 times later is then dry at 60-65 DEG C in an oven
- 72h for 24 hours obtains SnO2The NO of/ethylenediamine graphite alkene composite material2Gas sensor.
2. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 1, special
Sign is in step 1 prepared by graphene oxide Hummer ' s method.
3. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 1 or 2,
It is characterized in that in step 1 that graphene oxide is configured to graphene oxide water solution using ultrasonic wave added method.
4. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 3, special
Sign is in step 1 with distilled water centrifuge washing product 5 times or more.
5. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 3, special
Sign is in step 1 that graphene oxide water solution concentration is 2.3~3.3mg/mL.
6. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 3, special
Sign is that the concentration of ethylenediamine graphite aqueous solution in step 1 is 0.9~1.1mg/mL.
7. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 3, special
Sign is SnO in step 22The concentration of the ethanol solution of/ethylenediamine graphite alkene composite material is 50~100mg/mL.
8. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 3, special
Sign is in step 2 that the mass ratio of stannic chloride pentahydrate and ethylenediamine graphite alkene is 1：0.002~0.003.
9. a kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature according to claim 3, special
Sign is that the mass concentration of concentrated hydrochloric acid in step 2 is 37%~37.5%.
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| CN110243881A (en) * | 2019-07-16 | 2019-09-17 | 东北大学 | One kind being based on rGO-SnO2The NO of nanocomposite2Gas sensor and preparation method thereof |
| CN112611786A (en) * | 2020-12-01 | 2021-04-06 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation of graphene-loaded tin dioxide quantum dot for formaldehyde and nitrogen dioxide gas detection, product and application |
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| CN109781795A (en) * | 2019-01-25 | 2019-05-21 | 西安交通大学 | A kind of basic cobaltous carbonate and the air-sensitive film sensor of composite construction of RGO and preparation method thereof |
| CN110243881A (en) * | 2019-07-16 | 2019-09-17 | 东北大学 | One kind being based on rGO-SnO2The NO of nanocomposite2Gas sensor and preparation method thereof |
| CN112611786A (en) * | 2020-12-01 | 2021-04-06 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation of graphene-loaded tin dioxide quantum dot for formaldehyde and nitrogen dioxide gas detection, product and application |
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