CN104310386A - Preparation method and application of graphene-based light-driven material - Google Patents
Preparation method and application of graphene-based light-driven material Download PDFInfo
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Abstract
The invention relates to a preparation method of a graphene-based light-driven material. The preparation method comprises the following steps: 1) dispersing graphene oxide in an organic solvent to obtain an organic dispersion; 2) transferring the dispersion into a reaction kettle, and performing high-temperature solvent thermal reaction; 3) replacing a reaction solvent filled in the graphene material after reaction with water; 4) performing freeze-drying treatment on the graphene material filled with the water; and 5) performing high-temperature baking in an inert atmosphere or a vacuum environment to prepare the graphene-based light-driven material. The preparation method provided by the invention has the advantages that the light-driven material prepared by the method has good light absorption performance; under the light irradiation, the light-driven material has a series of features, such as light-induced driving feature: the light-driven material can be pushed, lifted or rotated by light; electron emission feature: the light-driven material can produce current signals which can be detected; and based on the features, the material can be used for preparing spacecrafts and other light-driven devices, light detection devices or light control devices.
Description
Technical field
The present invention relates to the preparation of optical drive material, particularly a kind of preparation method of the optical drive material based on Graphene and application.
Background technology
Before neoteric and modern physics grows up, the concept of radiation pressure has been used to formation and the directivity of explaining the tail of a comet, utilizes the radiation pressure of sunlight and optical pressure to provide the prototype of impellent imagination just to be proposed by Kepler for the aircraft that space navigate by water.Neoteric and modern physics is after particularly Maxwell's theory of electromagnetic field grows up, the problems such as the formation of radiation pressure and intensity can use classical physics or quantum mechanics to calculate from point of theory, on the other hand, radiation pressure is also utilized experiment to be confirmed at the twentieth century initial stage by physicist and measures.The applied research of radiation pressure is extensively carried out at second page of twentieth century immediately.
The development of laser technology facilitate utilize optical pressure to capture, the invention of the realization of manipulation of objects object and the technology such as optical tweezers based on this principle.These target objects can be the atom of nanoscale, molecule or ion, the dielectric particle of micro-meter scale, the polymer particles such as dust particle or polystyrene, and object such as viable cell, protein molecular, bacterium or the virus etc. on cell or ubcellular yardstick.But, up to the present, this technology capture and manipulating objects is still confined to micro-scale, its size is all in nanometer and micron dimension, and on the other hand, the moving range of this manipulation and translational speed are often also in micron dimension.The relating operation of this technology all needs to carry out under the microscope, and cannot realize capturing and handling macro-goal, and this just makes this technology be confined in microcosm all the time.
An other important application-solar sail the aircraft of optical pressure is also widely studied in the twentieth century later stage.Because optical pressure is a very little power, on LEO, the impellent that sunlight produces on one square metre of total reflection area is about 0.9 dyne i.e. 9 μ N, and this just makes optical pressure advance the propulsion mode becoming the large specific impulse of a kind of low thrust.If utilize the useful load that optical pressure is certainweight to provide propulsive force, and this propulsive force will enough make it accelerate to cosmic speed required for spaceflight within the acceptable time, and so unique approach improves the specular cross section of " solar sail " this structure exactly.This is just to the Material selec-tion of solar sail, and manufacturing process, brings great challenge in expansion technique and work-ing life etc.So up to the present, the routine technical identification experiment of IKAROS solar sail airship one in solar sail aircraft, is only had to obtain successfully.
In this vacuum environment of space, sunlight is uniquely stable, continuous and the energy derive of unlimited supply.If the material of Development of Novel or technology, very effective optical drive on a macroscopic scale can be realized, and the impellent that this effect provides is far longer than the impellent that optical pressure can provide, so it will be significant to utilizing sunlight to realize effective spaceflight.In addition, this to macro object control on a macroscopic scale and driving, the drive unit used under manufacturing other environment can be applied to equally, such as, " light tweezer " technology in macro-scale.In addition, utilize material to the response characteristic of light, light detection device or light control device can be developed equally.
Summary of the invention
The object of the invention is for above-mentioned technical Analysis, a kind of preparation method and application thereof of the optical drive material based on Graphene are provided, optical drive material prepared by the method has good absorbing properties, and under the irradiation of light, there is series of characteristics: as photic drive characteristic, can be promoted by light, lift or rotate; As electron emission characteristic, the current signal that can be detected can be produced; Based on these characteristics, this material can be used to prepare space craft and other drive units, light detection device or light control device.
Technical scheme of the present invention:
Based on a preparation method for the optical drive material of Graphene, step is as follows:
1) by graphene oxide dispersion in organic solvent, through stirring, supersound process, graphene oxide fully, is well disperseed, obtains organic dispersions;
2) above-mentioned dispersion liquid is transferred in high pressure solvent thermal response still, then still is sealed, put into pre-warmed baking oven, high-temperature solvent thermal response is carried out at temperature is 180 DEG C, reaction times is 12-18 hour, after question response still is cooled to room temperature, takes out the grapheme material being full of reaction solvent, be placed in container;
3) reaction solvent be full of in above-mentioned grapheme material is replaced into water;
4) above-mentioned water-filled grapheme material is carried out lyophilize process at temperature is for-60 DEG C to-40 DEG C;
5) grapheme material after above-mentioned lyophilize process is carried out high-temperature roasting 1 hour in inert atmosphere or vacuum tightness is not higher than 10Pa environment at 800-1200 DEG C, the obtained optical drive material based on Graphene.
Described graphene oxide is on the sheet molecular structure skeleton that rearranged according to hexagonal lattice by carbon atom in Graphene, containing various oxygen-containing functional group thus formed two dimensional surface material, wherein oxygen-containing functional group is carboxyl, carbonyl, hydroxyl or epoxy bond, and the monolithic area of graphene oxide is 1m
2-3000
μm
2, single-sheet thickness is 0.6-2.0 nm, and oxygen level is 10 – 50wt%.
Described organic solvent is the mixture of one or more arbitrary proportions in methyl alcohol, ethanol, ethylene glycol, Virahol and acetone.
In described organic dispersions, the concentration of graphene oxide is 0.2-5mg/mL, and by changing the size of solution usage quantity and reactor, the density making the final optical drive material based on Graphene is 0.3-14mg/cm
3, the volume of single piece of material is 2-200cm
3.
The optical drive material based on Graphene prepared in the present invention has following series of features:
1) material has porous spongy structure, and porosity is very high, and density is very little;
2) material has high electroconductibility;
3) material has good photo absorption performance, at the reflectivity of 400-800nm wave band lower than 5%;
4) material has photic drive characteristic, can be driven under the irradiation of visible ray, and light source is the solar simulated that laser, xenon short-act lamp or xenon long-arc lamp produce, the sunlight using various optical lens to focus on; The form driven is that the sample of this optical drive material based on Graphene is pushed, is picked up or rotates under the irradiation of light source;
5) under the irradiation of light, material has electron emission characteristic, utilizes specific device current signal to be detected.
An application for the prepared optical drive material based on Graphene, for the preparation of optical drive device or device, photo-detector proofing unit or light control device;
Material should be positioned over vacuum environment by the operation of described photic driving, vacuum tightness is not higher than 10Pa, light source is positioned in the middle of vacuum environment, or on device, increases optical transmission window structure, uses quartzy light transmissive material in the local of vacuum unit, thus is introduced by light and irradiated material;
Described photo-detector proofing unit judges the opening and closing of light source and the intensity of light by the presence or absence and intensity measuring current signal;
Described optical drive device or device, under the effect of light, provide enough impellents, realize the transport of useful load in space environment, are namely used as the puopulsion unit of space vehicle;
The positions of materials change that described optical drive device or device are caused by photic driving realizes light guide, or realizes light guide by light-current signal-analog to digital conversion.
Advantage of the present invention is: optical drive material prepared by the method has good absorbing properties, and under the irradiation of light, has series of characteristics: as photic drive characteristic, can be promoted, lifts or rotate by light; As electron emission characteristic, the current signal that can be detected can be produced; Based on these characteristics, this material can be used to prepare space craft and other drive units, light detection device or light control device.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of the optical drive material based on Graphene.
Fig. 2 is the photic driving phenomenon photo of optical drive material under lasing based on Graphene.
Fig. 3 is the photic driving phenomenon photo of optical drive material under the effect of xenon short-act lamp solar simulated light source based on Graphene.
Fig. 4 is the pattern layout making a kind of optical drive and control device based on the optical drive material of Graphene.
Fig. 5 is as the pattern layout of the space craft of puopulsion unit based on the optical drive material of Graphene.
Fig. 6 is the design making a kind of light detection device based on the optical drive material of Graphene.
Fig. 7 is the response curve of light detection device under laser radiation made based on the optical drive material of Graphene.
Fig. 8 is one of pattern layout of a kind of light control device made based on the optical drive material of Graphene.
Fig. 9 is the pattern layout two of a kind of light control device made based on the optical drive material of Graphene.
Embodiment
Below by embodiment, the present invention is specifically described; the present embodiment is only for being further detailed the present invention; limiting the scope of the invention can not be interpreted as; those skilled in the art makes some nonessential improvement and adjustment according to the content of the invention described above, all belongs to scope.
Embodiment:
Based on a preparation method for the optical drive material of Graphene, step is as follows:
1) by graphene oxide dispersion in organic solvent, concentration is 0.37mg/mL, through stirring, supersound process, graphene oxide fully, is well disperseed, obtains organic dispersions; Described graphene oxide is on the sheet molecular structure skeleton that rearranged according to hexagonal lattice by carbon atom in Graphene, containing various oxygen-containing functional group thus formed two dimensional surface material, wherein oxygen-containing functional group is carboxyl, carbonyl, hydroxyl and epoxy bond, and the monolithic area of graphene oxide is about 2000
μm
2, single-sheet thickness is 1.1nm, and oxygen level is 45wt%;
2) above-mentioned for 80mL dispersion liquid is transferred to volume to be 100mL, to have in teflon-lined high pressure solvent thermal response still, then still is sealed, put into pre-warmed baking oven, high-temperature solvent thermal response is carried out at temperature is 180 DEG C, reaction times is 12 hours, after question response still is cooled to room temperature, takes out the grapheme material being full of reaction solvent, be placed in container;
3) be water by the reaction solvent ethanol replacement be full of in above-mentioned grapheme material;
4) above-mentioned water-filled grapheme material is carried out lyophilize process at temperature is for-50 DEG C;
5) grapheme material after above-mentioned lyophilize process is carried out high-temperature roasting 1 hour in an inert atmosphere at 800 DEG C, the obtained optical drive material based on Graphene, its density is 1.1mg/cm
3.
The porous spongy structure of material as shown in Figure 1.Under the solar simulated irradiation that Different Light-laser, xenon short-act lamp produce, should have photic driving phenomenon fast and effectively based on the optical drive material of Graphene, material " can be lifted " by light, as shown in Figure 2 and Figure 3.
Based on this optical drive phenomenon, can should be used to make drive unit based on the optical drive material of Graphene, a kind of prototype of this device as shown in Figure 4.Based on this material under the irradiation of effective light, enough large impellent can be produced, therefore it can be utilized to manufacture puopulsion unit for space craft provides impellent in space environment, what relate in a kind of pattern layout of space craft as shown in Figure 5 is such.Utilize device as shown in Figure 6, can directly detect this material current signal that electron emission produces under the irradiation of light based on Graphene in the present invention, as shown in Figure 7, therefore it can be used to detect light one group of typical test curve.Utilize the character of this optical drive material based on Graphene, the positions of materials that can be caused by photic driving change or light-current signal-analog to digital conversion realize light guide, shown in Fig. 8, Fig. 9.
Claims (5)
1., based on a preparation method for the optical drive material of Graphene, it is characterized in that step is as follows:
1) by graphene oxide dispersion in organic solvent, through stirring, supersound process, graphene oxide fully, is well disperseed, obtains organic dispersions;
2) above-mentioned dispersion liquid is transferred in high pressure solvent thermal response still, then still is sealed, put into pre-warmed baking oven, high-temperature solvent thermal response is carried out at temperature is 180 DEG C, reaction times is 12-18 hour, after question response still is cooled to room temperature, takes out the grapheme material being full of reaction solvent, be placed in container;
3) reaction solvent be full of in above-mentioned grapheme material is replaced into water;
4) above-mentioned water-filled grapheme material is carried out lyophilize process at temperature is for-60 DEG C to-40 DEG C;
5) grapheme material after above-mentioned lyophilize process is carried out high-temperature roasting 1 hour in inert atmosphere or vacuum tightness is not higher than 10Pa environment at 800-1200 DEG C, the obtained optical drive material based on Graphene.
2. according to claim 1 based on the preparation method of the optical drive material of Graphene, it is characterized in that: described graphene oxide is on the sheet molecular structure skeleton that rearranged according to hexagonal lattice by carbon atom in Graphene, containing various oxygen-containing functional group thus formed two dimensional surface material, wherein oxygen-containing functional group is carboxyl, carbonyl, hydroxyl or epoxy bond, and the monolithic area of graphene oxide is 1m
2-3000
μm
2, single-sheet thickness is 0.6-2.0 nm, and oxygen level is 10 – 50wt%.
3. according to claim 1 based on the preparation method of the optical drive material of Graphene, it is characterized in that: described organic solvent is the mixture of one or more arbitrary proportions in methyl alcohol, ethanol, ethylene glycol, Virahol and acetone.
4. according to claim 1 based on the preparation method of the optical drive material of Graphene, it is characterized in that: in described organic dispersions, the concentration of graphene oxide is 0.2-5mg/mL, by changing the size of solution usage quantity and reactor, the density making the final optical drive material based on Graphene is 0.3-14mg/cm
3, the volume of single piece of material is 2-200cm
3.
5. an application for the optical drive material based on Graphene prepared by claim 1, is characterized in that: for the preparation of optical drive device or device, photo-detector proofing unit or light control device;
Material should be positioned over vacuum environment by the operation of described photic driving, vacuum tightness is not higher than 10Pa, light source is positioned in the middle of vacuum environment, or on device, increases optical transmission window structure, uses quartzy light transmissive material in the local of vacuum unit, thus is introduced by light and irradiated material;
Described photo-detector proofing unit judges the opening and closing of light source and the intensity of light by the presence or absence and intensity measuring current signal;
Described optical drive device or device, under the effect of light, provide enough impellents, realize the transport of useful load in space environment, are namely used as the puopulsion unit of space vehicle;
The positions of materials change that described optical drive device or device are caused by photic driving realizes light guide, or realizes light guide by light-current signal-analog to digital conversion.
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| CN107043100A (en) * | 2016-02-05 | 2017-08-15 | 闫立群 | A kind of grapheme material, its preparation method and its purposes as optical drive material |
| CN107720728A (en) * | 2017-09-15 | 2018-02-23 | 南开大学 | A kind of terahertz electromagnetic wave stealth material based on graphene |
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| CN112093794A (en) * | 2020-09-09 | 2020-12-18 | 长沙新材料产业研究院有限公司 | Graphene optical drive material and preparation method thereof |
| CN112125296A (en) * | 2020-09-09 | 2020-12-25 | 长沙新材料产业研究院有限公司 | Graphene optical drive material and preparation method thereof |
| CN112537767A (en) * | 2019-09-23 | 2021-03-23 | 中国科学院上海硅酸盐研究所苏州研究院 | High-elasticity three-dimensional graphene macroscopic body and preparation method thereof |
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| CN112537767A (en) * | 2019-09-23 | 2021-03-23 | 中国科学院上海硅酸盐研究所苏州研究院 | High-elasticity three-dimensional graphene macroscopic body and preparation method thereof |
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