CN109713050A - A kind of graphene-ZnO composite material and preparation method and ultraviolet detector - Google Patents
A kind of graphene-ZnO composite material and preparation method and ultraviolet detector Download PDFInfo
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Abstract
The invention discloses a kind of graphene-ZnO composite material and preparation method and ultraviolet detectors, for the preparation method of the graphene-ZnO composite material the following steps are included: (1) obtains vertical graphene platelet using radio frequency plasma enhancing chemical vapour deposition technique on substrate, the substrate uses nickel foam；(2) electrochemical deposition method cross growth ZnO nano-wire between the vertical graphene platelet is used.Graphene-ZnO composite material the specific surface area with higher that the present invention obtains, when applied in ultraviolet detector, effectively increase the surface area (i.e. practical photosensitive area) and light induced electron utilization efficiency of photosensitive layer in ultraviolet detector device, and make the ultraviolet detector based on graphene-ZnO composite material that there is higher electric property and stability, and the capacity of heat transmission increases.
Description
Technical field
The present invention relates to ultraviolet detector technical field, in particular to a kind of graphene-ZnO composite material and its
Preparation method and ultraviolet detector.
Background technique
Ultraviolet detector based on wide band gap semiconducter nano material is due to lower power consumption, higher quantum effect
Rate, lighter weight and the advantages of convenient for integrated preparation, are the hot issues of photodetector research field in recent years.Mesh
Before, using ZnO as important wide bandgap semiconductor materials, ZnO chemical stability with higher and thermal stability, exciton beam
Tiing up can greatly (60meV), and fusing point is high, the feature very sensitive to ultraviolet light, therefore, carries out ZnO nano-structure as photosensitive layer
Ultraviolet detector has huge application prospect.
Ultraviolet detector device working principle based on ZnO nano material is as follows: when ultraviolet light, light is by ZnO
It absorbing, and generates electron hole pair in ZnO, photo-generated carrier is separated into electrons and holes under the action of applying bias, and
Two end electrodes are flowed to, electric current is formed, reaches the Effect on Detecting to ultraviolet light.
However, the detector of such ZnO nano material is there are high electron-hole recombination rate, specific surface area be restricted it is lower and
Not the disadvantages of anti-light corrosivity.
Summary of the invention
In view of this, a kind of graphene-ZnO composite material and preparation method provided by the invention and non-solid electrolyte
Tantalum capacitor, the problem of preferably overcoming above-mentioned prior art objective reality and defect, increase by using radio frequency plasma
Extensive chemical vapour deposition process obtains vertical graphene platelet on substrate, has antiradar reflectivity and high-absorbility, then uses
Electrochemical deposition method cross growth ZnO nano-wire between vertical graphene platelet, the ZnO nano-wire made are with higher
Specific surface area, when being applied in ultraviolet detector, the surface area for effectively increasing photosensitive layer in ultraviolet detector device is (i.e. practical
Photosensitive area) and light induced electron utilization efficiency, so that the sensing for improving ultraviolet light absorbs, increase photon capture, and therefore mention
High-quantum efficiency, so that the raising of ultraviolet detector device efficiency and sensitivity；Further, since grapheme material compares ITO, electricity
Conductance and thermal coefficient are all significantly increased, and therefore, the ultraviolet detector based on graphene-ZnO composite material has higher electricity
Performance and stability are learned, and the capacity of heat transmission increases.
A kind of preparation method of graphene-ZnO composite material, comprising the following steps:
(1) vertical graphene platelet, institute are obtained using radio frequency plasma enhancing chemical vapour deposition technique on substrate
Substrate is stated using nickel foam；
(2) electrochemical deposition method cross growth ZnO nano-wire between the vertical graphene platelet is used.
Further, described vertical on substrate using radio frequency plasma enhancing chemical vapour deposition technique in step (1)
The process of growth graphene platelet includes: to place the substrate into the reaction chamber of radio frequency plasma enhancing chemical vapor depsotition equipment
On sample stage with resistance heating ability, it is first passed through argon gas, keeps reacting indoor gas pressure intensity being 1Torr, with 20~25
DEG C/substrate is warming up to 600~1100 DEG C by the heating rate of min；Then methane and hydrogen are passed through in reaction chamber, work as reaction chamber
When interior gas pressure intensity is 10Torr, will penetrate power setting frequently is 800~1000W, after depositing 10~80min, on substrate
To vertical graphene platelet.
Further, before step (1) further include: enhance chemical gas using oxygen plasma cleaning radio frequency plasma
The reaction chamber of phase depositing device；In the cleaning process: sample stage temperature is 700~800 DEG C, and oxygen plasma power is 800
~1000W；The scavenging period is 80~100min.
Further, before step (1) further include: substrate is dipped in isopropanol or acetone soln and is cleaned by ultrasonic, so
It is rinsed afterwards with deionized water, then dry with nitrogen.
Further, in step (1), the flow of the methane is 1~30sccm；The flow of the hydrogen is 20sccm.
Further, in step (1), after deposition, it is cooled to room temperature reaction chamber under an argon atmosphere, then will reaction
The substrate that growth has vertical graphene platelet is taken out in room emptying.
Further, described laterally to be given birth between the vertical graphene platelet using electrochemical deposition method in step (2)
The process of long ZnO nano-wire includes: the precursor solution prepared and be made of zinc source and surfactant, then by the precursor
Solution is transferred in three-electrode system, wherein using the vertical graphene platelet obtained on substrate as working electrode, is made with paillon
For auxiliary electrode, using Ag/AgCl as reference electrode, by setting depositing temperature as 80~100 DEG C, sedimentation time is 1~
1.5h, sedimentation potential are -1.0~-0.8V, the cross growth ZnO nano-wire between the vertical graphene platelet；Finally incite somebody to action
To product be rinsed, dry with deionized water.
Further, in step (2), the zinc source is zinc nitrate solution or zinc acetate, and the surfactant is six times
Tetramine；The ratio of the amount of the substance of the zinc source and the surfactant is 1:1.
The present invention also provides a kind of graphene-ZnO composite materials, by the preparation of above-mentioned graphene-ZnO composite material
Method is prepared.
The present invention also provides a kind of ultraviolet detector, including photosensitive layer, the photosensitive layer uses above-mentioned graphene-
ZnO composite material.
Compared with prior art, a kind of graphene-ZnO composite material and preparation method and non-solid electrolysis of the invention
The beneficial effect of matter tantalum capacitor is:
The present invention obtains vertical graphene by using radio frequency plasma enhancing chemical vapour deposition technique on substrate
Thin slice has antiradar reflectivity and high-absorbility, then uses electrochemical deposition method cross growth between vertical graphene platelet
ZnO nano-wire, the graphene-ZnO composite material specific surface area with higher made, when being applied in ultraviolet detector,
The surface area (i.e. practical photosensitive area) and light induced electron utilization efficiency of photosensitive layer in ultraviolet detector device are effectively increased,
It is absorbed to improve the sensing of ultraviolet light, increases photon capture, and therefore improve quantum efficiency, so that ultraviolet detector device is imitated
The raising of rate and sensitivity；Further, since grapheme material compares ITO, conductivity and thermal coefficient are all significantly increased, therefore,
Ultraviolet detector based on graphene-ZnO composite material has higher electric property and stability, and the capacity of heat transmission increases.
In conclusion the present invention has the advantages that above-mentioned many and practical value, and there are no in similar product similar
Method publish or use and really belong to innovation, produce handy and practical effect, more existing technology, which has, promotes
Multinomial effect, thus more suitable for practical, and there is extensive industrial value.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, makees detailed
It is described as follows.
Specific embodiment
To facilitate the understanding of the present invention, it elaborates below with reference to the mode of embodiment to technical solution of the present invention,
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.
But the invention can be embodied in many other ways as described herein, those skilled in the art can be with
Similar improvement is done without violating the connotation of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
Unless otherwise defined, all technologies used herein and scientific term have and the common skill of fields of the present invention
The normally understood identical meaning of art personnel.When there is a conflict, the definition in this specification shall prevail.
Term as used herein:
Term "comprising" used herein, " comprising ", " having ", " containing " or its any other deformation, it is intended that covering
Non-exclusionism includes.For example, composition, step, method, product or device comprising listed elements are not necessarily limited to those and want
Element, but may include not expressly listed other elements or such composition, step, method, product or device it is intrinsic
Element.
Conjunction " by ... form " exclude any element that do not point out, step or component.If in claim,
This phrase will make claim closed, so that it is not included the material in addition to the material of those descriptions, but relative
Except customary impurities.When phrase " by ... form " be rather than immediately following theme in the clause that appears in claim main body after
When, only it is limited to element described in the clause；Other elements be not excluded the claim as a whole it
Outside.
Equivalent, concentration or other values or parameter are excellent with range, preferred scope or a series of upper limit preferred values and lower limit
When the Range Representation that choosing value limits, this should be understood as specifically disclosing by any range limit or preferred value and any range
Any pairing of lower limit or preferred value is formed by all ranges, regardless of whether the range separately discloses.For example, when open
When range " 1~5 ", described range should be interpreted as including range " 1~4 ", " 1~3 ", " 1~2 ", " 1~2 and 4~
5 ", " 1~3 and 5 " etc..When numberical range is described herein, unless otherwise stated, otherwise the range is intended to include its end
Value and all integers and score in the range.
"and/or" is used to indicate that one of illustrated situation or both may to occur, for example, A and/or B includes (A
And B) and (A or B).
The present invention provides a kind of preparation methods of graphene-ZnO composite material, comprising the following steps:
(1) vertical graphene platelet, institute are obtained using radio frequency plasma enhancing chemical vapour deposition technique on substrate
Substrate is stated using nickel foam.
Preferably, using radio frequency plasma enhancing chemical vapour deposition technique vertical-growth graphene platelet on substrate
Detailed process includes: to have electricity in the reaction chamber for be put into nickel foam substrate radio frequency plasma enhancing chemical vapor depsotition equipment
On the sample stage for hindering heating efficiency, it is first passed through argon gas, keeps reacting indoor gas pressure intensity being 1Torr, under the electric current of 60A,
Substrate is warming up to 600~1100 DEG C such as 600 DEG C, 700 DEG C, 800 DEG C, 900 DEG C, 1000 with the heating rate of 20~25 DEG C/min
DEG C or 1100 DEG C；Then methane and hydrogen are passed through in reaction chamber, when reacting indoor gas pressure intensity is 10Torr, will be penetrated frequently
Power setting is 800~1000W, and after depositing 10~80min, deposition growing obtains vertical graphene platelet on substrate.
It is 20 DEG C/min that above-mentioned heating rate is specific enumerable, 21 DEG C/min, 22 DEG C/min, 23 DEG C/min, 24 DEG C/min
Or 25 DEG C/min etc.；It is specific enumerable for 1000W, 1000W or 1000W etc. that above-mentioned frequency penetrates power；Above-mentioned sedimentation time specifically may be used
It is enumerated as 10min, 20min, 30min, 40min, 50min, 60min, 70min or 80min etc..
Preferably, indoor in the reaction that nickel foam substrate is put into radio frequency plasma enhancing chemical vapor depsotition equipment
Before on sample stage further include: using the reaction of oxygen plasma cleaning radio frequency plasma enhancing chemical vapor depsotition equipment
Room；In the cleaning process: sample stage temperature is 700~800 DEG C such as 700 DEG C, 750 DEG C or 800 DEG C, oxygen plasma power
For 800~1000W such as 800W, 900W or 1000W etc.；The scavenging period be 80~100min such as 80min, 90min or
100min etc..
Preferably, indoor in the reaction that nickel foam substrate is put into radio frequency plasma enhancing chemical vapor depsotition equipment
Before on sample stage further include: substrate is dipped in isopropanol or acetone soln and is cleaned by ultrasonic, is then rinsed with deionized water, then
It is dry with nitrogen.
Preferably, the flow of the above-mentioned argon gas being passed through is 20sccm.
Preferably, the flow of the above-mentioned methane being passed through be 1~30sccm such as 1sccm, 5sccm, 10sccm, 15sccm,
20sccm, 25sccm or 30sccm etc.；The flow for the hydrogen being passed through is 20sccm.
Further, after to above-mentioned deposition, it is cooled to room temperature reaction chamber under an argon atmosphere, the stone avoided
Black alkene thin slice is oxidized, then reaction chamber is vented to the substrate for taking out growth and having vertical graphene platelet.
(2) electrochemical deposition method cross growth ZnO nano-wire between the vertical graphene platelet is used.
Preferably, using the mistake of electrochemical deposition method cross growth ZnO nano-wire between the vertical graphene platelet
Journey includes: the precursor solution prepared and be made of zinc source and surfactant, and precursor solution is then transferred to three-electrode system
In, wherein using the vertical graphene platelet obtained on substrate as working electrode, using paillon as auxiliary electrode, with Ag/
AgCl is as reference electrode, and by setting depositing temperature as 80~100 DEG C, sedimentation time is 1~1.5h, and sedimentation potential is -1.0
~-0.8V, the cross growth ZnO nano-wire between vertical graphene platelet；Finally obtained product is carried out with deionized water
It rinses, to remove the ion of surface absorption, then re-dry, obtains graphene-ZnO composite material.
Specific enumerable above-mentioned depositing temperature is 80 DEG C, 80 DEG C or 80 DEG C etc.；Above-mentioned sedimentation time it is specific enumerable for 1h,
1.2h or 1.5h etc.；Above-mentioned sedimentation potential is specific enumerable for -0.8V, -0.9V or -01.0V etc..
Preferably, above-mentioned zinc source uses zinc nitrate solution or zinc acetate, and above-mentioned surfactant uses hexamethylenetetramine；
In the precursor solution of preparation, the ratio of the amount of the substance of zinc source and surfactant is 1:1.
The present invention also provides a kind of graphene-ZnO composite materials, by the preparation of above-mentioned graphene-ZnO composite material
Method is prepared.
The present invention also provides a kind of ultraviolet detector, including photosensitive layer, the photosensitive layer uses above-mentioned graphene-
ZnO composite material.
The present invention obtains vertical graphene by using radio frequency plasma enhancing chemical vapour deposition technique on substrate
Thin slice has antiradar reflectivity and high-absorbility, then uses electrochemical deposition method cross growth between vertical graphene platelet
ZnO nano-wire, the graphene-ZnO composite material specific surface area with higher made, when being applied in ultraviolet detector,
The surface area (i.e. practical photosensitive area) and light induced electron utilization efficiency of photosensitive layer in ultraviolet detector device are effectively increased,
It is absorbed to improve the sensing of ultraviolet light, increases photon capture, and therefore improve quantum efficiency, so that ultraviolet detector device is imitated
The raising of rate and sensitivity；Further, since grapheme material compares ITO, conductivity and thermal coefficient are all significantly increased, therefore,
Ultraviolet detector based on graphene-ZnO composite material has higher electric property and stability, and the capacity of heat transmission increases.
To facilitate the understanding of the present invention, below with reference to embodiment to further illustrate the technical scheme of the present invention.Applicant
Statement, the present invention are illustrated by the following examples detailed process equipment and process flow of the invention, but the present invention not office
It is limited to following detailed process equipments and process flow, that is, does not mean that the present invention should rely on above-mentioned detailed process equipment and technique stream
Cheng Caineng is implemented.It should be clear to those skilled in the art, any improvement in the present invention, to each original of product of the present invention
The equivalence replacement of material and addition, the selection of concrete mode of auxiliary element etc. all fall within protection scope of the present invention and open model
Within enclosing.
Embodiment 1
(1) using the reaction chamber of oxygen plasma cleaning radio frequency plasma enhancing chemical vapor depsotition equipment；It cleaned
Cheng Zhong: making sample stage temperature reach 700 DEG C, is 800~1000W by oxygen plasma power setting；Scavenging period is 80min.
(2) nickel foam substrate ready for use is first dipped in aqueous isopropanol and is cleaned by ultrasonic, then rinsed with deionized water,
It is dry with nitrogen again.
It (3) will be through step (2) treated nickel foam substrate is put into radio frequency plasma enhancing chemical vapor depsotition equipment
Reaction chamber on the sample stage with resistance heating ability, be first passed through argon gas, make its flow 20sccm, in holding reaction chamber
Gas pressure intensity be 1Torr substrate is warming up to 600 DEG C with the heating rate of 20 DEG C/min under the electric current of 60A；Then will
Methane and hydrogen are passed through in reaction chamber, wherein the flow of methane is 1sccm, and the flow of hydrogen is 20sccm, indoor when reacting
When gas pressure intensity is 10Torr, power setting will be penetrated frequently as 800W, after 10min, deposition growing obtains vertical stone on substrate
Black alkene thin slice；After deposition, it is cooled to room temperature reaction chamber under an argon atmosphere, the graphene platelet avoided is by oxygen
Change, then reaction chamber is vented to the substrate for taking out growth and having vertical graphene platelet.
(4) precursor solution being made of zinc nitrate and hexamethylenetetramine is prepared, wherein zinc nitrate and six methines four
The ratio of the amount of the substance of amine is 1:1.
(5) precursor solution prepared through step (1) is transferred in three-electrode system, wherein with what is obtained on substrate
Vertical graphene platelet, using Ag/AgCl as reference electrode, passes through setting using paillon as auxiliary electrode for working electrode
Depositing temperature is 80 DEG C, sedimentation time 1h, and sedimentation potential is -0.8V, and lateral deposition is grown between vertical graphene platelet
ZnO nano-wire.
(6) finally obtained product is rinsed with deionized water, to remove the ion of surface absorption, then again
It is dry, obtain graphene-ZnO composite material.
Embodiment 2
(1) using the reaction chamber of oxygen plasma cleaning radio frequency plasma enhancing chemical vapor depsotition equipment；It cleaned
Cheng Zhong: making sample stage temperature reach 750 DEG C, is 900W by oxygen plasma power setting；Scavenging period is 90min.
(2) nickel foam substrate ready for use is first dipped in acetone soln and is cleaned by ultrasonic, then rinsed with deionized water, then
It is dry with nitrogen.
It (3) will be through step (2) treated nickel foam substrate is put into radio frequency plasma enhancing chemical vapor depsotition equipment
Reaction chamber on the sample stage with resistance heating ability, be first passed through argon gas, make its flow 20sccm, in holding reaction chamber
Gas pressure intensity be 1Torr substrate is warming up to 800 DEG C with the heating rate of 23 DEG C/min under the electric current of 60A；Then will
Methane and hydrogen are passed through in reaction chamber, wherein the flow of methane is 10sccm, and the flow of hydrogen is 20sccm, when in reaction chamber
Gas pressure intensity when being 10Torr, will penetrate power setting frequently is 900W, and after 40min, deposition growing obtains vertical on substrate
Graphene platelet；After deposition, it is cooled to room temperature reaction chamber under an argon atmosphere, the graphene platelet avoided is by oxygen
Change, then reaction chamber is vented to the substrate for taking out growth and having vertical graphene platelet.
(4) precursor solution being made of zinc acetate and hexamethylenetetramine is prepared, wherein zinc nitrate and six methines four
The ratio of the amount of the substance of amine is 1:1.
(5) precursor solution prepared through step (1) is transferred in three-electrode system, wherein with what is obtained on substrate
Vertical graphene platelet, using Ag/AgCl as reference electrode, passes through setting using paillon as auxiliary electrode for working electrode
Depositing temperature is 90 DEG C, sedimentation time 1h, and sedimentation potential is -0.9V, and lateral deposition is grown between vertical graphene platelet
ZnO nano-wire.
(6) finally obtained product is rinsed with deionized water, to remove the ion of surface absorption, then again
It is dry, obtain graphene-ZnO composite material.
Embodiment 3
(1) using the reaction chamber of oxygen plasma cleaning radio frequency plasma enhancing chemical vapor depsotition equipment；It cleaned
Cheng Zhong: making sample stage temperature reach 800 DEG C, is 1000W by oxygen plasma power setting；Scavenging period is 100min.
(2) nickel foam substrate ready for use is first dipped in aqueous isopropanol and is cleaned by ultrasonic, then rinsed with deionized water,
It is dry with nitrogen again.
It (3) will be through step (2) treated nickel foam substrate is put into radio frequency plasma enhancing chemical vapor depsotition equipment
Reaction chamber on the sample stage with resistance heating ability, be first passed through argon gas, make its flow 20sccm, in holding reaction chamber
Gas pressure intensity be 1Torr substrate is warming up to 1000 DEG C with the heating rate of 25 DEG C/min under the electric current of 60A；Then will
Methane and hydrogen are passed through in reaction chamber, wherein the flow of methane is 20sccm, and the flow of hydrogen is 20sccm, when in reaction chamber
Gas pressure intensity when being 10Torr, will penetrate power setting frequently is 1000W, and after 60min, deposition growing obtains vertical on substrate
Graphene platelet；After deposition, it is cooled to room temperature reaction chamber under an argon atmosphere, the graphene platelet avoided is by oxygen
Change, then reaction chamber is vented to the substrate for taking out growth and having vertical graphene platelet.
(4) precursor solution being made of zinc acetate and hexamethylenetetramine is prepared, wherein zinc nitrate and six methines four
The ratio of the amount of the substance of amine is 1:1.
(5) precursor solution prepared through step (1) is transferred in three-electrode system, wherein with what is obtained on substrate
Vertical graphene platelet, using Ag/AgCl as reference electrode, passes through setting using paillon as auxiliary electrode for working electrode
Depositing temperature is 100 DEG C, sedimentation time 1h, and sedimentation potential is -1.0V, and lateral deposition is grown between vertical graphene platelet
ZnO nano-wire.
(6) finally obtained product is rinsed with deionized water, to remove the ion of surface absorption, then again
It is dry, obtain graphene-ZnO composite material.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of graphene-ZnO composite material, it is characterised in that: the following steps are included:
(1) vertical graphene platelet, the lining are obtained using radio frequency plasma enhancing chemical vapour deposition technique on substrate
Bottom uses nickel foam；
(2) electrochemical deposition method cross growth ZnO nano-wire between the vertical graphene platelet is used.
2. the preparation method of graphene-ZnO composite material according to claim 1, it is characterised in that: in step (1), institute
State using radio frequency plasma enhancing chemical vapour deposition technique on substrate the process of vertical-growth graphene platelet include: that will serve as a contrast
Bottom is put into the reaction chamber of radio frequency plasma enhancing chemical vapor depsotition equipment on the sample stage with resistance heating ability, first
It is passed through argon gas, keeps reacting indoor gas pressure intensity being 1Torr, is warming up to substrate with the heating rate of 20~25 DEG C/min
600~1100 DEG C；Then methane and hydrogen are passed through in reaction chamber, it, will frequency when reacting indoor gas pressure intensity is 10Torr
Penetrating power setting is that 800~1000W obtains vertical graphene platelet after depositing 10~80min on substrate.
3. the preparation method of graphene-ZnO composite material according to claim 2, it is characterised in that: step (1) it
Before further include: using the reaction chamber of oxygen plasma cleaning radio frequency plasma enhancing chemical vapor depsotition equipment；The cleaning
In the process: sample stage temperature is 700~800 DEG C, and oxygen plasma power is 800~1000W；The scavenging period be 80~
100min。
4. the preparation method of graphene-ZnO composite material according to claim 2, it is characterised in that: step (1) it
Before further include: substrate is dipped in isopropanol or acetone soln and is cleaned by ultrasonic, is then rinsed with deionized water, then is dry with nitrogen
It is dry.
5. the preparation method of graphene-ZnO composite material according to claim 2, it is characterised in that: in step (1), institute
The flow for stating methane is 1~30sccm；The flow of the hydrogen is 20sccm.
6. the preparation method of graphene-ZnO composite material according to claim 2, it is characterised in that: in step (1), sink
After product, it is cooled to room temperature reaction chamber under an argon atmosphere, then reaction chamber is vented taking-up growth vertical graphene
The substrate of thin slice.
7. the preparation method of graphene-ZnO composite material according to claim 1, it is characterised in that: in step (2), institute
State using electrochemical deposition method process of cross growth ZnO nano-wire between the vertical graphene platelet include: prepare by
The precursor solution, is then transferred in three-electrode system by the precursor solution in zinc source and surfactant composition, wherein with
The vertical graphene platelet obtained on substrate is working electrode, using paillon as auxiliary electrode, using Ag/AgCl as reference
Electrode, by setting depositing temperature as 80~100 DEG C, sedimentation time is 1~1.5h, and sedimentation potential is -1.0~-0.8V, in institute
State cross growth ZnO nano-wire between vertical graphene platelet；Obtained product is rinsed with deionized water finally, is done
It is dry.
8. the preparation method of graphene-ZnO composite material according to claim 7, it is characterised in that: in step (2), institute
Stating zinc source is zinc nitrate solution or zinc acetate, and the surfactant is hexamethylenetetramine；The zinc source and the surface are living
Property agent substance amount ratio be 1:1.
9. a kind of graphene-ZnO composite material, it is characterised in that: by graphene-ZnO according to any one of claims 1 to 8
The preparation method of composite material is prepared.
10. a kind of ultraviolet detector, it is characterised in that: including photosensitive layer, the photosensitive layer uses graphite as claimed in claim 9
Alkene-ZnO composite material.
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| CN113818040A (en) * | 2021-08-23 | 2021-12-21 | 东南大学 | For CO2Copper catalyst for preparing ethanol by electroreduction and preparation method and application thereof |
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| CN113818040A (en) * | 2021-08-23 | 2021-12-21 | 东南大学 | For CO2Copper catalyst for preparing ethanol by electroreduction and preparation method and application thereof |
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