CN109596668A - The gas sensitive for enhancing gas sensing and its preparation and application are modified based on copper ion - Google Patents
The gas sensitive for enhancing gas sensing and its preparation and application are modified based on copper ion Download PDFInfo
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Abstract
The invention discloses a kind of to modify the gas sensitive for enhancing gas sensing and its preparation and application based on copper ion, this modifies the gas sensitive of enhancing gas sensing using graphene oxide as basis material based on copper ion, it interacts first with supermolecule in the functional organic molecules of graphene oxide over-assemble D- π-A structure, to improve its responsiveness and selectivity to acetic acid gas, then it is obtained with copper ion attachment modification.In the above manner, the present invention is based on the gas sensitives that copper ion modifies enhancing gas sensing to show highly sensitive and selectivity to acetic acid gas, there is quick response and recoverability；Environmentally friendly using graphene oxide as basis material, low energy consumption, and raw materials used simple, at low cost.
Description
Technical field
The present invention relates to gas sensitive technical fields, and in particular to a kind of gas that enhancing gas sensing is modified based on copper ion
Quick material and its preparation method and application.
Background technique
Monitoring with society to environment, the control of air quality, the detection of pollutant, toxic gas and fuel gas
Demand increasingly increases, and causes people's demand growing to chemical sensor.Commercial chemical sensor is in practical application
In should have high sensitivity, the characteristic of quick response and reply simultaneously, and micro object gas is gone out at ambient temperature
Color selectivity.Meanwhile at room temperature to the continuous detection of environmental gas for outstanding gas sensitive no less important.
Acetic acid can stab mucous membrane of mouth, cause vocal cords rupture etc. serious as a kind of volatile substance, such as a large amount of suckings
Consequence.The height of acetic acid content has a great impact to the quality and mouthfeel of wine in Liquor-making industry.It is right in current national standard
The measuring method of acetic acid is cumbersome and time-consuming, laborious.Therefore, have in production and living to the quick accurate test of acetic acid important
Meaning.In addition, heroin meets water in air can decomposite acetic acid gas in illicit drugs inspection, drug law enforcement police dog, which exactly relies on, to smell
This acidic materials find drugs out.Therefore, acetic acid sensing material is equally of great significance in illicit drugs inspection field.
Traditional gas sensor based on metal oxide can only show good sensing capabilities at high temperature, this is logical
It often will receive poor selectivity, respond low, the influence of long turnaround time and high power consumption within a few minutes even a few houres.Such as
Disadvantage more than this significant impact traditional metal-oxide based material being widely used in gas sensor.Functionalization
Graphene because of its biggish specific surface area and there is outstanding prospect in terms of gas sensor due to high carrier mobility.It arrives
So far, the research about graphene-based acetic acid sensing characteristics is also fewer, response of the unmodified graphene to gas
Property and selectivity it is poor, traditional covalent bond modification can destroy the intrinsic electric property of graphene.Pass through small molecule and graphene
The supermolecule interaction that non-covalent bond occurs while maintaining graphene intrinsic structure, has big using two-dimensional graphene
The characteristics of specific surface area, at normal temperature can more effectively adsorb gas.But general grapheme material is to the response time of gas
It is all longer with turnaround time, it can not practical application.Therefore, prepare to work at room temperature, and has quick response
It is still very difficult with the graphene acetic acid sensing material of recoverability.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of air-sensitive materials that enhancing gas sensing is modified based on copper ion
Material and its preparation and application should show acetic acid gas based on the gas sensitive of copper ion modification enhancing gas sensing highly sensitive
Degree has quick response and recoverability.
The technical scheme adopted by the invention is that: a kind of gas sensitive for modifying enhancing gas sensing based on copper ion, institute
The gas sensitive for modifying enhancing gas sensing based on copper ion is stated to be tied by graphene oxide and D- π-A (Donor- π-Acceptor)
The organic molecule of structure by supermolecular mechanism it is compound after, modify and be made through reduction and copper ion.
Preferably, electron donor and electron acceptor are contained in the organic molecule of the D- π-A structure, and passes through the phenyl ring of conjugation
Connection.Electron donor can such as acyl group, aldehyde radical, carboxyl, acylamino-, sulfonic group, itrile group, nitro, haloform base, quaternary amine base, electronics
Receptor can such as amino, hydroxyl, alkoxy, ester group, aminoacyl, amine aldehyde radical, phenyl, alkyl.
It is further preferred that the organic molecule of the D- π-A structure includes 4- oxyquinoline, 5- amino-naphthalene -1- sodium sulfonate
At least one of.
Preferably, the supermolecular mechanism is π-π stacking.The disconnected of chemical bond does not occur for the compound assembling process of supermolecular mechanism
It splits and generates.
Gas sensing, the especially sensing to acetic acid gas can be enhanced by copper ion modification in the gas sensitive, to acetic acid
Gas shows high sensitivity, has quick response and recoverability.
The preparation method for enhancing the gas sensitive of gas sensing is modified based on copper ion the present invention also provides more than one,
The following steps are included:
S1, it takes graphene oxide to be dissolved in the water, prepares graphene oxide dispersion；Stirring, concussion, object can specifically be passed through
Reason the methods of ultrasound dissolves graphene oxide sufficiently, to be stablized, finely dispersed graphene oxide dispersion；
The organic molecule of D- π-A structure is added in S2, Xiang Suoshu graphene oxide dispersion, is sufficiently mixed, oxygen therein
Graphite alkene and the organic molecule of D- π-A structure obtain the first mixed solution by supermolecular mechanism formation super-molecule assembling body；
Hydrazine hydrate is added in the first mixed solution of S3, Xiang Suoshu, carries out chemical reduction reaction, super-molecule assembling body therein
It is reduced by the redox graphene assembly of the organic molecule modification of D- π-A structure, obtains the second mixed solution；It is adding
Simultaneously uniform stirring mixed solution is slowly added to when hydrazine hydrate, usually to guarantee the graphite oxide in hydrazine hydrate and super-molecule assembling body
Alkene comes into full contact with；In addition, chemical reduction reaction usually carries out under heating environment, heating environment temperature is generally 75~85 DEG C；
Soluble copper salt is added in the second mixed solution of S4, Xiang Suoshu, is sufficiently mixed, copper ion is made to adhere to modification step S3
It is middle through the resulting assembly of chemical reduction reaction, the gas sensitive that enhancing gas sensing is modified based on copper ion is made.
Preferably, in step s 4, before adding soluble copper salt in the second mixed solution of Xiang Suoshu, first to described second
Mixed solution carries out suction filtration processing, with remove extra hydrazine hydrate and it is unassembled on D- π-A structure organic molecule；It will take out again
Filter products therefrom is dissolved in the water, and dispersion liquid is made；And then soluble copper salt is added into the dispersion liquid, it is sufficiently mixed.It takes out
Filter products therefrom be dissolved in the water, generally use ultrasonic treatment to be stablized, finely dispersed dispersion liquid.
Preferably, in step sl, the concentration of the graphene oxide dispersion is 0.5~2mg/mL.Further preferably
Ground, the concentration of the graphene oxide dispersion are 1mg/mL.
Preferably, in step s 2, the mass ratio of the organic molecule and the graphene oxide of the D- π-A structure is
(20~25): 1, i.e. the additive amount of the organic molecule of D- π-A structure is 20~25 times of graphene oxide quality；Further preferably
Ground, the mass ratio of the two are 23:1.
Preferably, in step s3, the mass ratio of the hydrazine hydrate and the graphene oxide is (1~5): 1, that is, it is hydrated
The additive amount of hydrazine accounts for 1~5 times of graphene oxide quality；It is further preferred that the mass ratio of the two is 3:1.
Preferably, in step s 4, described that copper ion in the gas sensitive of enhancing gas sensing is modified based on copper ion
Concentration is 5~20mg/mL.Copper chloride, copper sulphate etc. specifically can be selected in soluble copper salt.
The gas sensitive for modifying enhancing gas sensing based on copper ion above can be applied in the detection of acetic acid gas, specifically
The gas sensitive for modifying enhancing gas sensing based on copper ion above can be coated on test electrode plate, be dried in the air naturally at room temperature
It is dry, obtain gas sensitive detection electrode slice；The above electrode slice is connected in gas sensitive detection equipment again, and then can be used for specific gas
The detection of body (such as acetic acid gas).
Thus, the present invention also provides a kind of gas sensitive detection equipment, including detecting electrode, the detecting electrode is equipped with air-sensitive
Coating, the material of the air-sensitive coating include the above gas sensitive that enhancing gas sensing is modified based on copper ion.
The method have the benefit that: the present invention provides a kind of air-sensitive that enhancing gas sensing is modified based on copper ion
Material and its preparation and application, the gas sensitive interact first with supermolecule in oxygen using graphene oxide as basis material
The organic molecule of graphite alkene over-assemble D- π-A structure, then be made with copper ion attachment modification.The raw materials used letter of the gas sensitive
It is single, it is at low cost；Basis material graphene oxide is relatively friendly to environment, and will not consume the extra energy in the synthesis process；
In addition, being the compound assembling of supermolecule of non-covalent bond between the organic molecule and graphene oxide of D- π-A structure, oxygen will not be destroyed
The two-dimension plane structure of graphite alkene, the electricity that graphene oxide can be kept intrinsic, macroscopic property etc.；Also, D- π-A structure
Organic molecule and graphene oxide between the compound assembling of supermolecule occur form assembly, and then modified using copper ion, can
Electron transfer rate between accelerated oxidation graphene and gas (such as acetic acid) molecule, and then change the electric property of material, it mentions
Material is risen to the response performance between acetic acid gas, quick response can be occurred to certain density acetic acid gas at room temperature
With reply, there is highly sensitive and selectivity, can be widely applied to the fields such as gas detection.
Detailed description of the invention
For the clearer technical solution illustrated in the embodiment of the present invention, will make below to required in embodiment description
Attached drawing briefly describes.
Fig. 1 a is the structural schematic diagram of 4- oxyquinoline in embodiment 1；
Fig. 1 b is the structural schematic diagram of super-molecule assembling body in embodiment 1；
Fig. 1 c is the structural schematic diagram of gas sensitive obtained by embodiment 1；
Fig. 2 is the SEM shape appearance figure of gas sensitive obtained by embodiment 1；
Fig. 3 is gas sensitive detection curve graph of the gas sensitive obtained by embodiment 1 to acetic acid gas；
Fig. 4 is the steady testing result figure of gas sensitive obtained by embodiment 1；
Fig. 5 is gas sensitive 4HQ-rGO/Cu in pure zirconia graphene GO, composite material 4HQ-rGO and embodiment 12+To second
The response comparison diagram of acid gas；
Fig. 6 is the selectivity test result figure of gas sensitive obtained by embodiment 1.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
The present embodiment interacts first with supermolecule in graphene oxide over-assemble using graphene oxide as basis material
The small organic molecule 4- oxyquinoline of D- π-A structure, then by it is copper ion doped in the composite, specific synthesis step is such as
Under:
S1, it weighs suitable graphene oxide (GO) and is dissolved in deionized water, be configured to the solution that concentration is 1mg/mL, so
It handles to obtain the stable matrix dispersion liquid being completely dissolved by physical method afterwards；
In a round bottom flask, the organic of D- π-A structure is then added in S2, the matrix dispersion liquid for taking part to prepare thereto
The mass ratio 23:1 of small molecule 4- oxyquinoline (4HQ), 4- oxyquinoline and graphene oxide；Make to aoxidize stone by physical method
Black alkene comes into full contact with 4- oxyquinoline, and graphene oxide and 4- oxyquinoline therein passes through supermolecular mechanism (π-π stacking)
Super-molecule assembling body is formed, the first mixed solution is obtained；Wherein, the structural formula of 4- oxyquinoline are as follows:Its structure
Schematic diagram is as shown in Figure 1a；Graphene oxide and the compound assembling of 4- oxyquinoline are formed by the structural representation of super-molecule assembling body
Figure is as shown in Figure 1 b；
Hydrazine hydrate solution, the matter of hydrazine hydrate and graphene oxide is added in S3, the first mixed liquor obtained in step s 2
Amount is than being 3:1；It is subsequently placed in 75~85 DEG C of heating device and carries out reduction reaction, obtain the reduction modified by 4- oxyquinoline
Graphene oxide composite material forms the second mixed solution；
S4, it takes the second mixed solution in Suction filtration device, removes unreacted hydrazine hydrate and non-supermolecule in mixed solution
Obtained product, is then redissolved in deionized water by the small organic molecule 4- oxyquinoline for the D- π-A structure that group is loaded onto,
Ultrasonic treatment obtains stable Supramolecular Assembling dispersion liquid；
S5, it weighs copper chloride and is dissolved in deionized water, be configured to the copper chloride solution that concentration is 40mg/mL, be then added
In the Supramolecular Assembling dispersion liquid that above-mentioned steps S4 is obtained, it is sufficiently mixed solution by physical method, is finally obtained by copper
Graphene-based material (the 4HQ-rGO/Cu that ion doping, small organic molecule 4- oxyquinoline are modified2+), i.e., it is modified based on copper ion
Enhance the gas sensitive of gas sensing, structural schematic diagram is as illustrated in figure 1 c；Wherein the concentration of copper ion is 15mg/mL.
The test of SEM Electronic Speculum is carried out to obtained gas sensitive, the shape appearance figure of gained SEM is as shown in Figure 2.
Embodiment 2
A kind of gas sensitive for modifying enhancing gas sensing based on copper ion, preparation method includes the following steps:
S1, it weighs suitable graphene oxide (GO) and is dissolved in deionized water, be configured to the solution that concentration is 0.5mg/mL,
Then it handles to obtain the stable matrix dispersion liquid being completely dissolved by physical method；
In a round bottom flask, the organic of D- π-A structure is then added in S2, the matrix dispersion liquid for taking part to prepare thereto
The mass ratio 20:1 of small molecule 4- oxyquinoline (4HQ), 4- oxyquinoline and graphene oxide；Make to aoxidize stone by physical method
Black alkene comes into full contact with 4- oxyquinoline, and graphene oxide and 4- oxyquinoline therein passes through supermolecular mechanism (π-π stacking)
Super-molecule assembling body is formed, the first mixed solution is obtained；
Hydrazine hydrate solution, the matter of hydrazine hydrate and graphene oxide is added in S3, the first mixed liquor obtained in step s 2
Amount is than being 1:1；It is subsequently placed in 75~85 DEG C of heating device and carries out reduction reaction, obtain the reduction modified by 4- oxyquinoline
Graphene oxide composite material forms the second mixed solution；
S4, it takes the second mixed solution in Suction filtration device, removes unreacted hydrazine hydrate and non-supermolecule in mixed solution
Obtained product, is then redissolved in deionized water by the small organic molecule 4- oxyquinoline for the D- π-A structure that group is loaded onto,
Ultrasonic treatment obtains stable Supramolecular Assembling dispersion liquid；
S5, it weighs copper chloride and is dissolved in deionized water, be configured to the copper chloride solution that concentration is 2mg/mL, be then added
State in the Supramolecular Assembling dispersion liquid that step S4 is obtained, be sufficiently mixed solution by physical method, finally obtain by copper from
Graphene-based material (the 4HQ-rGO/Cu of son doping, the modification of small organic molecule 4- oxyquinoline2+), i.e., increased based on copper ion modification
The gas sensitive of strong gas sensing；Wherein the concentration of copper ion is 5mg/mL.
Embodiment 3
A kind of gas sensitive for modifying enhancing gas sensing based on copper ion, preparation method includes the following steps:
S1, it weighs suitable graphene oxide (GO) and is dissolved in deionized water, be configured to the solution that concentration is 2mg/mL, so
It handles to obtain the stable matrix dispersion liquid being completely dissolved by physical method afterwards；
In a round bottom flask, the organic of D- π-A structure is then added in S2, the matrix dispersion liquid for taking part to prepare thereto
Small molecule 5- amino-naphthalene -1- sodium sulfonate, the mass ratio 25:1 of 5- amino-naphthalene -1- sodium sulfonate and graphene oxide；Pass through physics
Method comes into full contact with graphene oxide with 5- amino-naphthalene -1- sodium sulfonate, graphene oxide and 5- amino therein-naphthalene -1- sulphur
Sour sodium forms super-molecule assembling body by supermolecular mechanism (π-π stacking), obtains the first mixed solution；
Hydrazine hydrate solution, the matter of hydrazine hydrate and graphene oxide is added in S3, the first mixed liquor obtained in step s 2
Amount is than being 5:1；It is subsequently placed in heating device and carries out reduction reaction, obtain by 5- amino-naphthalene -1- sodium sulfonate modification oxygen reduction
Graphite alkene composite material forms the second mixed solution；
S4, the second mixed solution is taken out in Suction filtration device, remove unreacted hydrazine hydrate and non-oversubscription in mixed solution
Obtained product, is then redissolved in by the small organic molecule 5- amino-naphthalene -1- sodium sulfonate for the D- π-A structure that subgroup is loaded onto
In deionized water, ultrasonic treatment obtains stable Supramolecular Assembling dispersion liquid；
S5, it weighs copper chloride and is dissolved in deionized water, be configured to the copper chloride solution that concentration is 15mg/mL, be then added
In the Supramolecular Assembling dispersion liquid that above-mentioned steps S4 is obtained, it is sufficiently mixed solution by physical method, is finally obtained by copper
The graphene-based material of ion doping, small organic molecule 5- amino-naphthalene -1- sodium sulfonate modification, i.e., based on copper ion modification enhancing
The gas sensitive of gas sensing；Wherein the concentration of copper ion is 12mg/mL.
Embodiment 4
A kind of gas sensitive for modifying enhancing gas sensing based on copper ion, preparation method includes the following steps:
S1, it weighs suitable graphene oxide (GO) and is dissolved in deionized water, be configured to the solution that concentration is 1.2mg/mL,
Then it handles to obtain the stable matrix dispersion liquid being completely dissolved by physical method；
In a round bottom flask, the function of D- π-A structure is then added in S2, the matrix dispersion liquid for taking part to prepare thereto
Property small organic molecule 5- amino-naphthalene -1- sodium sulfonate, the mass ratio 22:1 of 5- amino-naphthalene -1- sodium sulfonate and graphene oxide；It is logical
Crossing physical method comes into full contact with graphene oxide with 5- amino-naphthalene -1- sodium sulfonate, graphene oxide and 5- amino-therein
Naphthalene -1- sodium sulfonate forms super-molecule assembling body by supermolecular mechanism (π-π stacking), obtains the first mixed solution；
Hydrazine hydrate solution, the matter of hydrazine hydrate and graphene oxide is added in S3, the first mixed liquor obtained in step s 2
Amount is than being 4:1；It is subsequently placed in heating device and carries out reduction reaction, obtain by 5- amino-naphthalene -1- sodium sulfonate modification oxygen reduction
Graphite alkene composite material forms the second mixed solution；
S4, the second mixed solution is taken out in Suction filtration device, remove unreacted hydrazine hydrate and non-oversubscription in mixed solution
Obtained product, is then redissolved in by the small organic molecule 5- amino-naphthalene -1- sodium sulfonate for the D- π-A structure that subgroup is loaded onto
In deionized water, ultrasonic treatment obtains stable Supramolecular Assembling dispersion liquid；
S5, it weighs in the Supramolecular Assembling dispersion liquid that copper sulphate addition above-mentioned steps S4 is obtained, passes through physics concussion side
Method is sufficiently mixed solution, finally obtains by copper ion doped, small organic molecule 5- amino-naphthalene -1- sodium sulfonate modification graphite
Olefinic base material modifies the gas sensitive of enhancing gas sensing based on copper ion；Wherein the concentration of copper ion is 20mg/mL.
The above obtained gas sensitive for modifying enhancing gas sensing based on copper ion can be applied to gas sensitization detection
In, for modifying the gas sensitive for enhancing gas sensing based on copper ion obtained by embodiment 1, including following operation step
It is rapid:
1) taking above-described embodiment 1 obtained, the gas sensitive 0.1mL drop coating based on copper ion modification enhancing gas sensing exists
In the interdigital electrode of test, vapors away the moisture in solution naturally at room temperature, obtain the electrode slice of test；Based on copper ion
The coated weight of the gas sensitive of modification enhancing gas sensing can be according to circumstances adjusted；
2) the test electrode slice prepared is connect in air-sensitive test device, is placed in the acetic acid gas that concentration is 1000ppm
It is tested in environment, including air-sensitive response, reply test and stability test.
Acquired results are as shown in Figure 3 and Figure 4.As shown in figure 3, embodiment 1 is obtained based on copper ion modification enhancing gas
The gas sensitive of sensing has higher response to acetic acid gas, and response time and turnaround time are respectively 5s and 5s；Such as Fig. 4
Shown in, the gas sensitive for modifying enhancing gas sensing based on copper ion carries out repeatedly testing obtained result under same environment
It is almost the same, so that the provable gas sensitive that should modify enhancing gas sensing based on copper ion has good stable circulation
Property.
In addition, setting comparative example, respectively to comparative example gas sensitive and the present invention is based on copper ion modify enhancing gas pass
The gas sensitive of sense carries out the gas sensitive detection and comparative analysis to acetic acid gas.It is specific as follows:
Contrast sample 1: using pure zirconia graphene (GO) as gas sensitive；
Contrast sample 2: super-molecule assembling body (4HQ-rGO) point is prepared according to the preparation method of step S1-S4 in embodiment 1
Dispersion liquid, and using it as gas sensitive；
Test specimen 1: gas sensitive (4HQ-rGO/Cu obtained by embodiment 12+)。
Using the above gas sensitization detection method, the above contrast sample 1, contrast sample 2 and test specimen 1 are carried out respectively
It is as shown in Figure 5 to the air-sensitive response and reply test, acquired results of acetic acid gas.As shown in Figure 5, relative to contrast sample 1
The gas sensitive (4HQ-rGO) of gas sensitive (GO) and contrast sample 2, the gas sensitive (4HQ-rGO/Cu of test specimen 12+) right
Acetic acid gas has higher response, and response time and turnaround time are short.Therefore the present invention is based on copper ions to modify enhancing gas
The gas sensitive of sensing can be efficiently applied in the fields such as acetic acid sensing.
In addition, the gas sensitive made to embodiment 1 carries out selectivity test using the above gas sensitization detection method,
Specifically, the gas with various of same concentration (500ppm) is tested respectively, gas with various includes acetic acid, acetone, ethyl alcohol, two
Chloromethanes, ethyl acetate, shown in acquired results Fig. 6.It will be appreciated from fig. 6 that gas sensitive obtained by embodiment 1 is to acetic acid gas meter
Reveal excellent selectivity.
By upper, the above gas sensitive for modifying enhancing gas sensing based on copper ion can be used for preparing gas sensitive detection equipment
Specifically one layer of air-sensitive coating, the material of the air-sensitive coating can be arranged in detecting electrode on the detecting electrode of gas sensitive detection equipment
The gas sensitive of the invention that enhancing gas sensing is modified based on copper ion can be used.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by described claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (10)
1. a kind of gas sensitive for modifying enhancing gas sensing based on copper ion, which is characterized in that described to be modified based on copper ion
Enhance the gas sensitive of gas sensing by graphene oxide and the organic molecule of D- π-A structure by supermolecular mechanism it is compound after,
It is made through reduction and copper ion modification.
2. the gas sensitive according to claim 1 for modifying enhancing gas sensing based on copper ion, which is characterized in that described
Contain electron donor and electron acceptor in the organic molecule of D- π-A structure, and passes through the connection of the phenyl ring of conjugation.
3. the gas sensitive according to claim 2 for modifying enhancing gas sensing based on copper ion, which is characterized in that described
The organic molecule of D- π-A structure includes at least one of 4- oxyquinoline, 5- amino-naphthalene -1- sodium sulfonate.
4. the gas sensitive according to any one of claim 1-3 for modifying enhancing gas sensing based on copper ion, special
Sign is that the gas is acetic acid gas.
5. the preparation side of the gas sensitive of any of claims 1-4 for modifying enhancing gas sensing based on copper ion
Method, which comprises the following steps:
S1, it takes graphene oxide to be dissolved in the water, prepares graphene oxide dispersion；
The organic molecule of D- π-A structure is added in S2, Xiang Suoshu graphene oxide dispersion, is sufficiently mixed, it is molten to obtain the first mixing
Liquid；
Hydrazine hydrate is added in the first mixed solution of S3, Xiang Suoshu, carries out chemical reduction reaction, obtains the second mixed solution；
Soluble copper salt is added in the second mixed solution of S4, Xiang Suoshu, is sufficiently mixed.
6. the preparation method of the gas sensitive of enhancing gas sensing, feature are modified based on copper ion according to claim 5
Be, in step s 4, in the second mixed solution of Xiang Suoshu add soluble copper salt before, first to second mixed solution into
The processing of row suction filtration, then be dissolved in the water products therefrom is filtered, dispersion liquid is made, then add soluble copper into the dispersion liquid
Salt is sufficiently mixed.
7. the preparation method of the gas sensitive of enhancing gas sensing, feature are modified based on copper ion according to claim 5
It is, in step s 2, the organic molecule of the D- π-A structure and the mass ratio of the graphene oxide are (20~25): 1.
8. the preparation method of the gas sensitive of enhancing gas sensing, feature are modified based on copper ion according to claim 5
It is, in step s3, the mass ratio of the hydrazine hydrate and the graphene oxide is (1~5): 1.
9. gas sensitive the answering in detection acetic acid gas of enhancing gas sensing is modified described in claim 1-4 based on copper ion
With.
10. a kind of gas sensitive detection equipment, which is characterized in that including detecting electrode, the detecting electrode is equipped with air-sensitive coating, institute
The material for stating air-sensitive coating includes the gas sensitive for modifying enhancing gas sensing described in claim 1-4 based on copper ion.
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| CN112666228A (en) * | 2020-12-14 | 2021-04-16 | 华南师范大学 | Gas-sensitive composite material, preparation method thereof, gas-sensitive electrode and sensing equipment |
| CN113120950A (en) * | 2021-03-04 | 2021-07-16 | 华南师范大学 | Gas-sensitive material, preparation method thereof, gas-sensitive electrode and gas-sensitive detection equipment |
| CN113443646A (en) * | 2021-06-30 | 2021-09-28 | 华南师范大学 | Composite material and preparation method and application thereof |
| CN116818846A (en) * | 2023-06-21 | 2023-09-29 | 深圳市诺安智能股份有限公司 | Semiconductor gas sensing material and preparation method thereof |
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| CN113120950B (en) * | 2021-03-04 | 2023-05-12 | 华南师范大学 | Gas-sensitive material, preparation method thereof, gas-sensitive electrode and gas-sensitive detection equipment |
| CN113443646A (en) * | 2021-06-30 | 2021-09-28 | 华南师范大学 | Composite material and preparation method and application thereof |
| CN116818846A (en) * | 2023-06-21 | 2023-09-29 | 深圳市诺安智能股份有限公司 | Semiconductor gas sensing material and preparation method thereof |
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