CN109781795A - A kind of basic cobaltous carbonate and the air-sensitive film sensor of composite construction of RGO and preparation method thereof - Google Patents
A kind of basic cobaltous carbonate and the air-sensitive film sensor of composite construction of RGO and preparation method thereof Download PDFInfo
- Publication number
- CN109781795A CN109781795A CN201910074857.0A CN201910074857A CN109781795A CN 109781795 A CN109781795 A CN 109781795A CN 201910074857 A CN201910074857 A CN 201910074857A CN 109781795 A CN109781795 A CN 109781795A
- Authority
- CN
- China
- Prior art keywords
- rgo
- air
- cobaltous carbonate
- basic cobaltous
- composite construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The present invention discloses a kind of basic cobaltous carbonate and air-sensitive film sensor of composite construction of RGO and preparation method thereof, process are as follows: first prepare the dispersion liquid of graphene oxide, it is further uniformly mixed with the progress of the mixed liquor of CoCL2 6H2O and urea again, using one step hydro thermal method, the air-sensitive film of basic cobaltous carbonate and the composite construction of RGO can be obtained, it again will be in its drop coating to clean interdigital electrode, 40-80 DEG C baking 1-60 minutes, obtain the air-sensitive film sensor of basic cobaltous carbonate and the composite construction of RGO.The present invention can overcome the shortcomings that traditional sensors, simplify preparation process, while also realize room temperature detection.The problem of the present invention overcomes basic cobaltous carbonate material low conductivities improves the conductivity of material by introducing RGO, so that the influence of ambient noise is greatly diminished.The present invention overcomes the disadvantages of the gas absorption position deficiency of RGO, provide a large amount of gas molecule adsorption potential by introducing basic cobaltous carbonate for sensor, are greatly improved the air-sensitive response of sensor.
Description
Technical field
The invention belongs to field of sensing technologies, are related to the air-sensitive film sensing of a kind of basic cobaltous carbonate and RGO composite construction
The preparation of device, and in particular to a kind of basic cobaltous carbonate and the air-sensitive film sensor of composite construction of RGO and preparation method thereof.
Background technique
The gas sensitive that gas sensor field uses at present is mainly metal oxide, because it is with cracking response speed
Degree and high air-sensitive respond, and are worldwide studied personnel and widely praise highly.But its relatively cumbersome preparation process is (usually
Prepared using hydro-thermal method and the high temperature anneal) so that metal oxide high production cost.At the same time, metal oxide must
Must can just there be preferable air-sensitive to respond to gas when being heated to certain temperature (100-400 DEG C).This not only will increase energy damage
Consumption is unfavorable for environmental protection, while high temperature can bring greatly test risk for flammable explosive gas, and have been at high temperature
State can also weaken the service life of sensor.
Basic cobaltous carbonate prepares the predecessor of cobaltosic oxide mainly as use high annealing method all the time, and big
Known to family.However basic cobaltous carbonate is due to the feature of its own, and such as: simple preparation process, high-specific surface area, Yi Jite
There is 3D structure etc., keep it very potential as a kind of gas sensitive, and is applied to gas sensor field.But arrive mesh
Before until, it is extremely low to be primarily due to basic cobaltous carbonate for gas sensor domain variability report not relevant to basic cobaltous carbonate
Conductivity causes it that can not be applied well in terms of air-sensitive.
Graphene is widely used in every field because of its excellent conductivity, thermal conductivity, mechanical property etc..It is high
The specific surface area of conductivity and superelevation, so that graphene is in gas sensor by as active material.However graphene is due to it
Complete crystal structure, so that it lacks the adsorption potential with gas molecule effect, thus the gas-sensitive property of graphene is restricted.
Summary of the invention
To solve problems of the prior art, it is an object of the invention to propose a kind of basic cobaltous carbonate and RGO
Air-sensitive film sensor of composite construction and preparation method thereof, the present invention can overcome cumbersome preparation process, basic cobaltous carbonate
Low conductivity and RGO lack the problem of enough adsorption sites, using one step hydro thermal method can prepare basic cobaltous carbonate with
The air-sensitive film sensor of the composite construction of RGO, so that air-sensitive responds to have obtained great promotion.
To achieve the goals above, the technical scheme adopted by the invention is that:
A kind of preparation method of the air-sensitive film sensor of the composite construction of basic cobaltous carbonate and RGO, includes the following steps:
The mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea is mixed and heated carry out hydro-thermal by step 1)
Reaction, obtains the air-sensitive film of composite material i.e. basic cobaltous carbonate and the composite construction of RGO；Wherein, graphene oxide dispersion
In, the graphene oxide of 1-40mg is contained in the deionized water of every 30ml；In the mixed liquor of CoCL2 6H2O and urea, every 30ml
Deionized water in the urea containing 0.5-2.5g CoCL2 6H2O and 0.5-2.5g；Graphene oxide dispersion and six water chlorinations
The volume ratio of the mixed liquor of cobalt and urea is 1:1；
Step 2) cleans to the composite material that step 1) obtains, and obtains clean reactant；
Step 3) on the electrode by the resulting reactant drop coating of step 2), then is dried and is dried, and the alkali formula carbon is obtained
The air-sensitive film sensor of the composite construction of sour cobalt and RGO.
In the step 1), the preparation process of graphene oxide dispersion is as follows:
Graphene oxide is added into deionized water, obtains mixture, then to mixture concussion 10-60 minutes, then
It is 4-24 hours ultrasonic, obtain finely dispersed graphene oxide dispersion.
In the step 1), the preparation process of the mixed liquor of CoCL2 6H2O and urea is as follows:
CoCL2 6H2O and urea are added into deionized water, is ultrasonically treated 3 minutes, and continuously stirred with magnetic stirrer
10 minutes, it is mixed thoroughly deionized water, CoCL2 6H2O and urea.
In the step 1), when graphene oxide dispersion is mixed with the mixed liquor of CoCL2 6H2O and urea,
Graphene oxide dispersion is uniformly mixed with the mixed liquor of CoCL2 6H2O and urea, it is continuous with magnetic stirrer
Stirring 0.5-3 hours, so that solution is uniformly mixed.
In the step 1), the temperature of hydro-thermal reaction is 110-180 DEG C, and the reaction time is 1-6 hours.
In the step 2), centrifugal treating is carried out to the composite material that step 1) obtains, and removed and remained with deionized water
Impurity；Wherein, the revolving speed of centrifugal treating is 5000-12000 revs/min, and centrifugation time is 5-15 minutes.
It in the step 3), is dried at room temperature, flash-off time is 5-120 minutes；The temperature of baking is 40-80 DEG C,
Time is 5-30 minutes.
The electrode is interdigital electrode.
The air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate and RGO, the basic cobaltous carbonate and RGO's answers
The air-sensitive film sensor for closing structure is obtained by the above method.
Compared with prior art, the invention has the following beneficial effects:
The preparation method of the air-sensitive film sensor of the composite construction of basic cobaltous carbonate and RGO of the invention will first aoxidize stone
Black alkene dispersion liquid is uniformly mixed with the mixed liquor of CoCL2 6H2O and urea, prepared under one step hydro thermal method basic cobaltous carbonate with
The air-sensitive film of the composite construction of RGO carries out centrifugal treating, washing again later, the clean reactant drop coating that then will be obtained
On the electrode, it then is dried and is dried, obtain the air-sensitive film sensor of basic cobaltous carbonate and the composite construction of RGO.The present invention
Preparation process in, a step is achieved that the preparation of basic cobaltous carbonate, RGO is prepared by the reduction reaction of graphene oxide, with
And the preparation of composite construction.By three previous experimental procedures, it is reduced to a step and is also saved into while shortening technique
This.The air-sensitive film of the composite construction of basic cobaltous carbonate and RGO is basic cobaltous carbonate as sensitive material, has good gas
Absorption property, RGO provide good communication channel as conductive material, for basic cobaltous carbonate.Compared to single basic carbonate
Cobalt, the air-sensitive film of composite construction improve conductivity, and test electric current increases, so that the interference of ambient noise becomes smaller.To RGO
Speech, the air-sensitive film of composite construction provides a large amount of reaction site for gas molecule, so that gas performance greatly increases.It is comprehensive
Upper described, the present invention overcomes existing cumbersome preparation process, the low conductivity and RGO of basic cobaltous carbonate lack enough
The problem of adsorption site, is sensed using the air-sensitive film that one step hydro thermal method can prepare basic cobaltous carbonate and the composite construction of RGO
Device, so that air-sensitive responds to have obtained great promotion.
Pass through having for the preparation method of aforementioned present invention basic cobaltous carbonate and the air-sensitive film sensor of the composite construction of RGO
Beneficial effect makes it is found that the laminated film of basic cobaltous carbonate and RGO of the invention can make up for it the deficiency of metal oxide sensor
The preparation process of sensor is simplified, and realizes room temperature detection.The laminated film of basic cobaltous carbonate and RGO of the invention can gram
The low disadvantage of the conductivity of basic cobaltous carbonate is taken, applies it in gas sensor well.Basic cobaltous carbonate of the invention
It can make up for it the deficiency of graphene with the laminated film of RGO, specifically, simple graphene does not have since surface texture is complete
Enough sites that can be acted on gas, light and water, cause its sensing detection characteristic insufficient.Invention introduces basic carbonates
Cobalt and RGO progress are compound, are prepared into the composite construction of basic cobaltous carbonate and RGO as detection film, because basic cobaltous carbonate has
There are the advantages such as a large amount of gas molecule adsorption site of high-specific surface area, surface, so that the performance of film is greatly improved
, such as to the characterization of adsorption of gas.
Detailed description of the invention
Fig. 1 is scanning electron microscope (SEM) the analysis photo of laminated film prepared by the present invention；
Fig. 2 is X-ray diffraction (XRD) map of laminated film prepared by the present invention；
Fig. 3 is the air-sensitive film sensor of RGO sensor and basic cobaltous carbonate of the invention and the composite construction of RGO to not
With the air-sensitive response curve of concentration ammonia.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
The preparation method of the air-sensitive film sensor of the composite construction of basic cobaltous carbonate and RGO of the invention, including it is as follows
Step:
1) preparation of mixed reaction solution
1.1) preparation of graphene oxide dispersion
1-40mg graphene oxide is taken, is put into 30ml deionized water and shakes 10-60 minutes, it is then ultrasound 4-24 small
When, obtain finely dispersed graphene oxide dispersion.
1.2) preparation of the mixed liquor of CoCL2 6H2O and urea
The CoCL2 6H2O of 0.5-2.5g and the urea of 0.5-2.5g are weighed, is then added in 30ml deionized water, is surpassed
Sonication 3 minutes, and continuously stirred 10 minutes with magnetic stirrer, so that CoCL2 6H2O and urea is dissolved completely in deionized water
In and be uniformly mixed.
1.3) mixed process of the mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea
The graphene oxide dispersion of 30ml is uniformly mixed with the mixed liquor of 30ml CoCL2 6H2O and urea, uses magnetic force
Blender continuously stirs 0.5-3 hours, so that graphene oxide dispersion mixes with the mixed liquor of CoCL2 6H2O and urea
It is even.
2) hydro-thermal reaction
1) mixed liquor obtained is imported into reaction kettle, and is placed in baking oven, temperature is heated to 110-180
DEG C, it reacts 1-6 hours, obtains composite material.In hydrothermal reaction process, it is anti-that hydro-thermal occurs at high temperature with urea for CoCL2 6H2O
Basic cobaltous carbonate should be generated, and graphene oxide is also reduced into RGO at high temperature.Entirely after the reaction was completed, reaction kettle is taken
Out, its natural cooling is allowed.
3) centrifugal treating
Solution after cooling is obtained, to remove residual impurity therein, solution is divided into aliquot and is placed on centrifuge,
The revolving speed of centrifuge is 5000-12000 revs/min, and centrifugation time is progress centrifugal treating, in removal under the conditions of 5-15 minute
The solvent of layer, retains the sediment of bottom, then cleaned to sediment with deionized water, carries out centrifugal treating again later, this
Sample moves in circles repeatedly, i.e., cleans up resulting composite material.
4) gas sensor is prepared
Interdigital electrode is cleaned by ultrasonic with deionized water and alcohol, the composite material and THIN COMPOSITE that step 3) is obtained
Film dispersant liquid drop is coated in clean electrode (such as interdigital electrode), is dried at room temperature, and flash-off time is 5-120 minutes.
Electrode is placed in heating plate later and carries out low temperature drying, the temperature of baking is 40-80 DEG C, and the time is 5-30 minutes, after having dried
Just complete the production of the air-sensitive film sensor of basic cobaltous carbonate and the composite construction of RGO.
The air-sensitive film sensor that one step hydro thermal method of the invention prepares basic cobaltous carbonate and the composite construction of RGO passes through upper
State method acquisition.
Embodiment 1
The method of the air-sensitive film sensor for preparing basic cobaltous carbonate and the composite construction of RGO of the present embodiment, including such as
Lower step:
1) preparation of mixed reaction solution
1.1) preparation of graphene oxide dispersion
20mg graphene oxide is taken, is put into 30ml deionized water and shakes 30 minutes, then ultrasonic 8 hours, divided
Dissipate uniform graphene oxide dispersion.
1.2) preparation of the mixed liquor of CoCL2 6H2O and urea
The urea for weighing 1g CoCL2 6H2O and 1g, is then added in 30ml deionized water, is ultrasonically treated 3 minutes, and
It is continuously stirred 10 minutes with magnetic stirrer, is dissolved completely in CoCL2 6H2O and urea in deionized water and is uniformly mixed.
1.3) mixed process of the mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea
The graphene oxide dispersion of 30ml is uniformly mixed with the mixed liquor of 30ml CoCL2 6H2O and urea, uses magnetic force
Blender continuously stirs 1 hour, so that graphene oxide dispersion is uniformly mixed with the mixed liquor of CoCL2 6H2O and urea.
2) hydro-thermal reaction
1) mixed liquor obtained is imported into reaction kettle, and is placed in baking oven, temperature is heated to 130 DEG C,
Reaction 3 hours, obtains composite material.In hydrothermal reaction process, hydro-thermal reaction life occurs at high temperature for CoCL2 6H2O and urea
At basic cobaltous carbonate, and graphene oxide is also reduced into RGO at high temperature.Entirely after the reaction was completed, reaction kettle is taken out, is allowed
Its natural cooling.
3) centrifugal treating
Solution after cooling is obtained, to remove residual impurity therein, solution is divided into aliquot and is placed on centrifuge,
The revolving speed of centrifuge is 10000 revs/min, and centrifugation time is to carry out centrifugal treating under the conditions of 10 minutes, remove the molten of upper layer
Agent retains the sediment of bottom, then is cleaned with deionized water to sediment, carries out centrifugal treating again later, recycles in this way
Back and forth, i.e., resulting composite material is cleaned up.
4) gas sensor is prepared
Interdigital electrode is cleaned by ultrasonic with deionized water and alcohol, the laminated film dispersant liquid drop that step 3) is obtained
It is coated in clean interdigital electrode, is dried at room temperature, flash-off time is 30 minutes.Electrode is placed in heating plate later
Upper carry out low temperature drying, the temperature of baking are 50 DEG C, and the time is 15 minutes, and answering for basic cobaltous carbonate and RGO is just completed after having dried
Close the production of the air-sensitive film sensor of structure.
As shown in Figure 1, in scanning electron microscope (SEM) the analysis photo of laminated film manufactured in the present embodiment, wherein mark
The three-dimensional structure of sisal hemp shape is basic cobaltous carbonate (CCHH), the shape comparison rule of basic cobaltous carbonate, and scale ratio is more consistent.White
What is indicated in box is the graphene oxide (i.e. RGO) being reduced, it can be seen from the figure that RGO is evenly distributed in alkali formula carbon
Sour cobalt surface.
As shown in Fig. 2, laminated film exists in X-ray diffraction (XRD) map of laminated film manufactured in the present embodiment
(020)、(001)、(111)、(220)、(121)、(300)、(221)、(040)、(301)、(231)、(050)、(340)、
(060), occur the diffraction maximum of cleaning at (142), (412), (450) and (023), sent out by being compared to XRD material cards
Existing, which is<48-0083>basic cobaltous carbonate.
Referring to Fig. 3, the test condition and result of the gas-sensitive property curve of air-sensitive film sensor manufactured in the present embodiment are such as
Under:
Test condition: when air-sensitive is tested, using liquid ammonia, liquid ammonia is injected into external beaker container with syringe
(including desiccant), what the gas-circulating system by vacuumizing motor (MEDO VP0125-V1005-P2-1411) made
Dry ammonia uniformly mixes in gas chamber；When recovery, opens air chamber sealing lid and be passed through air.Entire test process, passes through PC
LabView control Keithley 2000 and 2002 high accuracy number multimeter of Keithley on machine carry out adopting for electric signal
Collection is extracted and is analyzed.
It is respectively the air-sensitive of basic cobaltous carbonate and RGO composite construction made from RGO film and the present embodiment shown in Fig. 3 curve
Film is transferred in interdigital electrode respectively, after being prepared into gas sensor, to the air-sensitive response curve of 6 kinds of various concentration ammonias.
It can be seen from the figure that two kinds of air-sensitive film sensors respond the air-sensitive of ammonia, with the increase of the concentration of ammonia, response is equal
It is incrementally increasing；At the same time, the response of the air-sensitive film sensor of basic cobaltous carbonate and RGO composite construction is significantly larger than RGO
Response of the thin film sensor to the ammonia under same concentrations.
As can be seen that the air-sensitive film sensor of basic cobaltous carbonate and RGO composite construction is to ammonia compared to simple RGO
The air-sensitive of gas responds to have obtained great promotion.
Embodiment 2
The method of the air-sensitive film sensor for preparing basic cobaltous carbonate and the composite construction of RGO of the present embodiment, including such as
Lower step:
1) preparation of mixed reaction solution
1.1) preparation of graphene oxide dispersion
1mg graphene oxide is taken, is put into 30ml deionized water and shakes 10 minutes, then ultrasonic 4 hours, dispersed
Uniform graphene oxide dispersion.
1.2) preparation of the mixed liquor of CoCL2 6H2O and urea
The urea for weighing 0.5g CoCL2 6H2O and 0.5g, is then added in 30ml deionized water, is ultrasonically treated 3 points
Clock, and continuously stirred 10 minutes with magnetic stirrer, it is dissolved completely in CoCL2 6H2O and urea in deionized water simultaneously completely
It is uniformly mixed.
1.3) mixed process of the mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea
The graphene oxide dispersion of 30ml is uniformly mixed with the mixed liquor of 30ml CoCL2 6H2O and urea, uses magnetic force
Blender continuously stirs 0.5 hour, so that graphene oxide dispersion is uniformly mixed with the mixed liquor of CoCL2 6H2O and urea.
2) hydro-thermal reaction
1) mixed liquor obtained is imported into reaction kettle, and is placed in baking oven, temperature is heated to 110 DEG C,
Reaction 1 hour, obtains composite material.In hydrothermal reaction process, hydro-thermal reaction life occurs at high temperature for CoCL2 6H2O and urea
At basic cobaltous carbonate, and graphene oxide is also reduced into RGO at high temperature.Entirely after the reaction was completed, reaction kettle is taken out, is allowed
Its natural cooling.
3) centrifugal treating
Solution after cooling is obtained, to remove residual impurity therein, solution is divided into aliquot and is placed on centrifuge,
The revolving speed of centrifuge is 5000 revs/min, and centrifugation time is to carry out centrifugal treating under the conditions of 5 minutes, remove the solvent on upper layer,
Retain the sediment of bottom, then sediment is cleaned with deionized water, carries out centrifugal treating again later, move in circles in this way
Repeatedly, i.e., resulting composite material is cleaned up.
4) gas sensor is prepared
Interdigital electrode is cleaned by ultrasonic with deionized water and alcohol, the laminated film dispersant liquid drop that step 3) is obtained
It is coated in clean interdigital electrode, is dried at room temperature, flash-off time is 5 minutes.Electrode is placed in heating plate later
Upper carry out low temperature drying, the temperature of baking are 40 DEG C, and the time is 5 minutes, and the compound of basic cobaltous carbonate and RGO is just completed after having dried
The production of the air-sensitive film sensor of structure.
Embodiment 3
The method that the present embodiment prepares the air-sensitive film sensor of basic cobaltous carbonate and the composite construction of RGO, including it is as follows
Step:
1) preparation of mixed reaction solution
1.1) preparation of graphene oxide dispersion
40mg graphene oxide is taken, is put into 30ml deionized water and shakes 60 minutes, then ultrasonic 24 hours, divided
Dissipate uniform graphene oxide dispersion.
1.2) preparation of the mixed liquor of CoCL2 6H2O and urea
The urea for weighing 2.5g CoCL2 6H2O and 2.5g, is then added in 30ml deionized water, is ultrasonically treated 3 points
Clock, and continuously stirred 10 minutes with magnetic stirrer, it is dissolved completely in CoCL2 6H2O and urea in deionized water simultaneously completely
It is uniformly mixed.
1.3) mixed process of the mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea
The graphene oxide dispersion of 30ml is uniformly mixed with the mixed liquor of 30ml CoCL2 6H2O and urea, uses magnetic force
Blender continuously stirs 3 hours, so that graphene oxide dispersion is uniformly mixed with the mixed liquor of CoCL2 6H2O and urea.
2) hydro-thermal reaction
1) mixed liquor obtained is imported into reaction kettle, and is placed in baking oven, temperature is heated to 180 DEG C,
Reaction 6 hours, obtains composite material.In hydrothermal reaction process, hydro-thermal reaction life occurs at high temperature for CoCL2 6H2O and urea
At basic cobaltous carbonate, and graphene oxide is also reduced into RGO at high temperature.Entirely after the reaction was completed, reaction kettle is taken out, is allowed
Its natural cooling.
3) centrifugal treating
Solution after cooling is obtained, to remove residual impurity therein, solution is divided into aliquot and is placed on centrifuge,
The revolving speed of centrifuge is 12000 revs/min, and centrifugation time is to carry out centrifugal treating under the conditions of 15 minutes, remove the molten of upper layer
Agent retains the sediment of bottom, then is cleaned with deionized water to sediment, carries out centrifugal treating again later, recycles in this way
Back and forth, i.e., resulting composite material is cleaned up.
4) gas sensor is prepared
Interdigital electrode is cleaned by ultrasonic with deionized water and alcohol, the laminated film dispersant liquid drop that step 3) is obtained
It is coated in clean interdigital electrode, is dried at room temperature, flash-off time is 120 minutes.Electrode is placed in heating later
Carry out low temperature drying on plate, the temperature of baking is 80 DEG C, and the time is 30 minutes, and basic cobaltous carbonate and RGO are just completed after having dried
The production of the air-sensitive film sensor of composite construction.
The present invention has the following advantages compared with the preparation process of other sensors and sensing detection characteristic:
1. compare traditional gas sensor, the present invention by three synthesis technologies be simplified to together, save the time and at
This；
2. comparing traditional gas sensor, the present invention realizes the detection to air-sensitive under room temperature；
3. comparing single basic cobaltous carbonate material, the sensitive thin film of composite construction of the invention is promoted by introducing RGO
The conductivity of material, so that the influence of ambient noise is greatly diminished；
4. comparing single RGO, the sensitive thin film of composite construction of the invention is sensor by introducing basic cobaltous carbonate
A large amount of gas molecule adsorption potential is provided, the air-sensitive response of sensor is greatly improved.
Claims (8)
1. a kind of preparation method of the air-sensitive film sensor of the composite construction of basic cobaltous carbonate and RGO, which is characterized in that including
Following steps:
It is anti-to be mixed and heated progress hydro-thermal by step 1) for the mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea
It answers, obtains composite material；Wherein, the oxidation stone in graphene oxide dispersion, in the deionized water of every 30ml containing 1-40mg
Black alkene；In the mixed liquor of CoCL2 6H2O and urea, in the deionized water of every 30ml containing 0.5-2.5g CoCL2 6H2O and
The urea of 0.5-2.5g；The volume ratio of the mixed liquor of graphene oxide dispersion and CoCL2 6H2O and urea is 1:1；
Step 2) cleans to the composite material that step 1) obtains, and obtains clean reactant；
Step 3) on the electrode by the resulting reactant drop coating of step 2), then is dried and is dried, obtains the basic cobaltous carbonate
With the air-sensitive film sensor of the composite construction of RGO.
2. the preparation of the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate according to claim 1 and RGO
Method, which is characterized in that in the step 1), the preparation process of graphene oxide dispersion is as follows:
Graphene oxide is added into deionized water, obtains mixture, then shake 10-60 minutes the mixture, it is then ultrasonic
4-24 hours, obtain finely dispersed graphene oxide dispersion.
3. the preparation of the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate according to claim 1 and RGO
Method, which is characterized in that in the step 1), the preparation process of the mixed liquor of CoCL2 6H2O and urea is as follows:
CoCL2 6H2O and urea are added into deionized water, is ultrasonically treated 3 minutes, and continuously stir 10 points with magnetic stirrer
Clock is mixed thoroughly deionized water, CoCL2 6H2O and urea.
4. the preparation of the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate according to claim 1 and RGO
Method, which is characterized in that in the step 1), graphene oxide dispersion is mixed with the mixed liquor of CoCL2 6H2O and urea
When,
Graphene oxide dispersion is uniformly mixed with the mixed liquor of CoCL2 6H2O and urea, is continuously stirred with magnetic stirrer
0.5-3 hours, so that solution is uniformly mixed.
5. the preparation of the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate according to claim 1 and RGO
Method, which is characterized in that in the step 1), the temperature of hydro-thermal reaction is 110-180 DEG C, and the reaction time is 1-6 hours.
6. the preparation of the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate according to claim 1 and RGO
Method, which is characterized in that in the step 2), centrifugal treating is carried out to the composite material that step 1) obtains, and use deionized water
Remove residual impurity；Wherein, the revolving speed of centrifugal treating is 5000-12000 revs/min, and centrifugation time is 5-15 minutes.
7. the preparation of the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate according to claim 1 and RGO
Method, which is characterized in that in the step 3), dried at room temperature, flash-off time is 5-120 minutes；The temperature of baking is
40-80 DEG C, the time is 5-30 minutes.
8. the air-sensitive film sensor of the composite construction of a kind of basic cobaltous carbonate and RGO, which is characterized in that the basic cobaltous carbonate
It is obtained with the air-sensitive film sensor of the composite construction of RGO by preparation method described in claim 1-7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074857.0A CN109781795B (en) | 2019-01-25 | 2019-01-25 | Gas-sensitive thin film sensor with basic cobalt carbonate and RGO composite structure and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074857.0A CN109781795B (en) | 2019-01-25 | 2019-01-25 | Gas-sensitive thin film sensor with basic cobalt carbonate and RGO composite structure and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109781795A true CN109781795A (en) | 2019-05-21 |
| CN109781795B CN109781795B (en) | 2020-03-17 |
Family
ID=66501286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910074857.0A Active CN109781795B (en) | 2019-01-25 | 2019-01-25 | Gas-sensitive thin film sensor with basic cobalt carbonate and RGO composite structure and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109781795B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176305A (en) * | 2021-04-20 | 2021-07-27 | 西安交通大学 | Composite gas sensitive material and preparation method thereof, ethanol gas sensor and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080257015A1 (en) * | 2006-11-28 | 2008-10-23 | Charles Martin Lukehart | Graphitic-carbon-nanofiber/polymer brushes as gas sensors |
| CN104458826A (en) * | 2014-10-28 | 2015-03-25 | 大连理工大学 | Novel ammonia sensor and preparation technology thereof |
| CN105185606A (en) * | 2015-09-14 | 2015-12-23 | 南京大学 | Preparation method of novel cobaltous dihydroxycarbonate-nitrogen-doped graphene combined electrode material |
| US20160041116A1 (en) * | 2014-08-06 | 2016-02-11 | Korea Advanced Institute Of Science And Technology | Composite metal oxide materials including polycrystalline nanofibers, microparticles, and nanoparticles, gas sensors using the same as a sensing material thereof, and manufacturing methods thereof |
| CN108828026A (en) * | 2018-06-25 | 2018-11-16 | 哈尔滨工业大学 | A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature |
| CN108847482A (en) * | 2018-07-04 | 2018-11-20 | 郑州大学 | Graphene/basic carbonate cobalt nanowire three-dimensional composite material preparation method and the application in anode of lithium ion battery |
-
2019
- 2019-01-25 CN CN201910074857.0A patent/CN109781795B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080257015A1 (en) * | 2006-11-28 | 2008-10-23 | Charles Martin Lukehart | Graphitic-carbon-nanofiber/polymer brushes as gas sensors |
| US20160041116A1 (en) * | 2014-08-06 | 2016-02-11 | Korea Advanced Institute Of Science And Technology | Composite metal oxide materials including polycrystalline nanofibers, microparticles, and nanoparticles, gas sensors using the same as a sensing material thereof, and manufacturing methods thereof |
| CN104458826A (en) * | 2014-10-28 | 2015-03-25 | 大连理工大学 | Novel ammonia sensor and preparation technology thereof |
| CN105185606A (en) * | 2015-09-14 | 2015-12-23 | 南京大学 | Preparation method of novel cobaltous dihydroxycarbonate-nitrogen-doped graphene combined electrode material |
| CN108828026A (en) * | 2018-06-25 | 2018-11-16 | 哈尔滨工业大学 | A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature |
| CN108847482A (en) * | 2018-07-04 | 2018-11-20 | 郑州大学 | Graphene/basic carbonate cobalt nanowire three-dimensional composite material preparation method and the application in anode of lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176305A (en) * | 2021-04-20 | 2021-07-27 | 西安交通大学 | Composite gas sensitive material and preparation method thereof, ethanol gas sensor and preparation method thereof |
| CN113176305B (en) * | 2021-04-20 | 2024-01-12 | 西安交通大学 | Composite gas-sensitive material and preparation method thereof, ethanol gas sensor and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109781795B (en) | 2020-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107308958B (en) | A kind of oxygen evolution reaction electrochemical catalyst and its preparation and application | |
| CN106587180B (en) | A kind of resistance slurry ruthenic oxide preparation method | |
| CN107033502B (en) | A kind of neodymium-doped titanium acid barium/organic matrix composite membrane of simple high energy storage density and preparation method thereof | |
| CN105261754B (en) | The preparation method of lithium ion conductor coated lithium ion battery lithium cobaltate cathode material | |
| CN105944721A (en) | Hydrothermal preparation method of flaky nano copper oxide/graphene composite materials | |
| CN108529692A (en) | The preparation method of hollow ball shape nickel oxide | |
| CN109622035A (en) | The preparation method and application of RGO-MIL-68 (Fe) nano-complex | |
| CN109133181A (en) | A kind of rGO-LaFeO3The preparation method of nanocomposite | |
| CN109781795A (en) | A kind of basic cobaltous carbonate and the air-sensitive film sensor of composite construction of RGO and preparation method thereof | |
| CN109342534A (en) | Lacking oxygen it is leading based on CuO/ZnFe2O4Dimethylbenzene gas sensor of core-shell structure microballoon and preparation method thereof | |
| CN109482175A (en) | A kind of yolk-shell structure cryptomelane-type manganese dioxide-catalyst and the preparation method and application thereof | |
| CN109637694A (en) | A kind of A, B codope strontium titanates conductor material and preparation method thereof | |
| CN109904411A (en) | A kind of preparation method and application of negative electrode of lithium ion battery graphite and cobalt-based metal organic frame composite material | |
| CN106207115B (en) | A kind of preparation method of nickel hydroxide electrode material | |
| CN110498405A (en) | A kind of graphene/tin oxide composite air-sensitive material and preparation method thereof | |
| CN108192565A (en) | A kind of preparation method of nano combined absorbing material | |
| CN103193395B (en) | A kind ofly to be on active service in the synthesis of the bismuth iron system multiferroic film of high electric field | |
| Yan et al. | Exothermic laws applicable to the degradation of o-phenylenediamine in wastewater via a Fe 3+/H 2 O 2 homogeneous quasi-Fenton system | |
| CN106964362A (en) | Metal molybdate/carbon composite nano-fiber and preparation method thereof and composite and its application | |
| CN106881118B (en) | A kind of method of ion-exchange synthesis heterojunction photocatalyst | |
| CN102328926B (en) | Method for selectively reducing graphene oxide by using hindered amine light stabilizer | |
| CN106744687A (en) | A kind of method that use chemical method prepares titanium hydride powders | |
| CN110518197A (en) | A kind of diatom complex material and preparation method thereof and the application in lithium ion battery | |
| CN101915711A (en) | Method for preparing V2O5-coated quartz crystal microbalance-based ethanol sensor | |
| CN107831269A (en) | The method of the tin dioxide gas-sensitive material stability of lifting vulcanization hydrogen sensitive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |