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CN106967427A - A kind of light-emitting film based on chlorine doped graphene quantum dot and preparation method thereof - Google Patents

A kind of light-emitting film based on chlorine doped graphene quantum dot and preparation method thereof Download PDF

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Publication number
CN106967427A
CN106967427A CN201710254588.7A CN201710254588A CN106967427A CN 106967427 A CN106967427 A CN 106967427A CN 201710254588 A CN201710254588 A CN 201710254588A CN 106967427 A CN106967427 A CN 106967427A
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quantum dot
graphene quantum
light
emitting film
chlorine
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汪桂根
李甲兵
王晓飞
陈友消
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Shenzhen Graduate School Harbin Institute of Technology
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Shenzhen Graduate School Harbin Institute of Technology
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    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/65Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00Nanooptics, e.g. quantum optics or photonic crystals
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    • B82NANOTECHNOLOGY
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    • B82Y40/00Manufacture or treatment of nanostructures
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    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2383/00Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2383/04Polysiloxanes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract

The invention provides a kind of preparation method of the light-emitting film based on chlorine doped graphene quantum dot, belong to luminescent material technical field;The preparation method of the chlorine doped graphene quantum dot light emitting film of the present invention, it is characterized in that chlorine doped graphene quantum dot prepared by hydro-thermal method is combined together with silicone matrix, wherein silicones is on the one hand as the decentralized medium of chlorine doped graphene quantum dot, prevent it from reuniting and fluorescent quenching, on the other hand provide mechanical performance and chemical stability for light-emitting film;Light-emitting film prepared by the present invention, its transparency and better heat stability, luminous intensity are high, are suitable for use as the white light LEDs of ultraviolet excitation.

Description

A kind of light-emitting film based on chlorine doped graphene quantum dot and preparation method thereof
Technical field
The invention belongs to LED luminescent material preparing technical field, and in particular to a kind of system of chlorine doped graphene quantum dot It is combined for and its with silicones and prepares light-emitting film.
Background technology
The advantage of white light LEDs is DC driven, response fast, small volume, long lifespan, all solid state, simple in construction, nontoxic, resistance to The good, luminous efficiency of time property is high, it is considered to be 21 century illuminates the green energy resource in the world.Lifting and price with LED light efficiency Decline, LED market penetration rate lifts rapidly.Using fluorescent RE powder as luminescent material more than current white light LEDs, still The large-scale promotion application of such technology is limited as luminescent material as a result of rare earth.On the one hand due to rare earth be can not Regenerated resources, fluorescent lamp progressively substitutes incandescent lamp and consumes substantial amounts of rare earth, is on the other hand exploitation and smelting because rare earth Various environmental problems can be brought.Therefore the efficient luminescent material of new environmental protection is developed as countries in the world The demand and trend of social development, scientific research personnel are also extremely paid close attention to this.
Due to based on blue light, influenceing its application in white light LEDs more than the graphene quantum dot studied at present.Mix at present Miscellaneous type graphene quantum dot is more adulterated with N based on, the report of few graphene quantum dots adulterated on chlorine.In graphene amount Chlorine is introduced in son point(Cl)Atom, will be in sp2The π and π of carbon*Cl energy level is introduced between energy level(3.5 eV), so that electronics The pattern of transition becomes variation, just more has a variety of different photons to be absorbed, and is also possible to launch the light of different colours.
The graphene quantum dot prepared at present mostly solution state, its luminescent properties are also mostly to be studied under solution state 's.In order to which graphene quantum dot is applied in the opto-electronic device, it is necessary to do not influenceing the basis of graphene quantum dot luminescent properties On by graphene quantum dot complete from liquid to the transformation of solid film state.Graphene quantum dot has one disadvantage in that to be exactly that concentration is sudden Go out, that is to say, that it is non-luminous that the graphene quantum dot of solid-state, which is packed together, in order to solve this problem, we will be Graphene quantum dot is scattered to prevent Nonradiative energy transfer caused by the contact between quantum dot in media as well, does not influence as far as possible Its luminescent properties.Studies have found that dispersiveness of the graphene quantum dot in organic polymer is preferably, quantum dot is in polymer In do not reunite;Fluorescence-quenching is effectively curbed.Graphene quantum dot is embedded in transparent polymeric matrix is Its first step of application in the opto-electronic device.Polymer is in light-emitting film on the one hand as scattered Jie of graphene quantum dot Matter, mechanical performance and chemical stability are provided for compound, on the other hand can reduce the reunion of graphene quantum dot, are kept molten The luminescent properties of graphene quantum dot under liquid single dispersing state.
For this reason, it is necessary to design a kind of new light-emitting film based on chlorine doped graphene quantum dot, it is possible to increase amount The stability of son point.
The content of the invention
The main object of the present invention is to provide a kind of light-emitting film based on chlorine doped graphene quantum dot, and the film can quilt UV LED chip excites and launches high intensity, stable white light, for overcoming existing quantum dot thin film stability not good Problem.
The present invention is achieved in that a kind of light-emitting film based on chlorine doped graphene quantum dot, described to be mixed based on chlorine Carbon source is beta-schardinger dextrin in the light-emitting film of miscellaneous graphene quantum dot, and doped source is hydrochloric acid, and base material is silicones.
Compared with prior art, chlorine doped graphene quantum dot is prepared, the relatively large β of molecular weight-ring paste is used Essence.Easily caused in the past using small molecules such as glucose, citric acid, acetic acid and series of intermediate products formed in carbonisation, So that the Size Distribution of graphene quantum dot broadens, and because beta-schardinger dextrin has bigger molecular dimension and and the ring-type knot that determines Structure, so allows for its graphene quantum dot that synthesis size uniformity is readily attached together in carbonisation.
Chlorine doped graphene quantum dot under the solution state of preparation is combined together by the present invention with silicon resin glue to be prepared Light-emitting film, effectively prevent the fluorescent quenching that quantum dot is reunited and caused.
The present invention further technical scheme be:The mass ratio of the beta-schardinger dextrin and the silicones is 1:5~20.
The present invention further technical scheme be:The mass ratio of the beta-schardinger dextrin and the hydrochloric acid is 1:0.59~3.36.
Another object of the present invention is to provide a kind of preparation side of the light-emitting film based on chlorine doped graphene quantum dot Method, its technical problem to be solved is to provide that a kind of technique is simple, product quality is high, cost is low, can be widely used in hair A kind of preparation method based on chlorine doped graphene quantum dot light emitting film in optical device manufacture.
This method comprises the following steps:
Step A:Prepare the graphene quantum dot of chlorine doping;
Step B:The graphene quantum dot that the chlorine is adulterated is mixed with silicones;
Step C:Prepare chlorine doped graphene quantum dot light emitting film.
The present invention further technical scheme be:The step A include it is following step by step:
Step A1:Beta-schardinger dextrin and hydrochloric acid are dissolved in deionized water, quantum dot solution is obtained;
Step A2:The quantum dot solution is incubated in 140 ~ 200 DEG C of water heating kettles;
Step A3:The step A2 products obtained are purified, the graphene quantum dot of chlorine doping is obtained.
The present invention further technical scheme be:Step A3 include it is following step by step:
Step A31:Filtered using 0.22 micron of filter membrane;
Step A32:Dialysed using 1000 Da pellicle.
The present invention further technical scheme be:The graphene quantum dot that the chlorine adulterates in the step B and silicon tree Also need to stir and vacuum defoamation after fat mixing.
The present invention further technical scheme be:The step C include it is following step by step:
Step C1:Product in step B is taken to be placed in Teflon mold;
Step C2:Preliminary drying is carried out, preliminary drying time is 2.5 ~ 4 h, and preliminary drying temperature is 45 ~ 55 DEG C;
Step C3:Dried, drying time is 22 ~ 26 h, drying temperature is 78 ~ 88 DEG C.
The present invention further technical scheme be:Beta-schardinger dextrin, hydrochloric acid, the mass ratio of deionized water are in the step A1 1:0.59~3.36:20~40。
The present invention further technical scheme be:The graphene quantum dot and the silicon of the doping of chlorine described in the step B The mass ratio of resin is 1:5~20.
The beneficial effects of the invention are as follows:The preparation method for the light-emitting film based on chlorine doped graphene quantum dot that this programme is provided With advantages below:
1. the present invention uses simple one step hydro thermal method using beta-schardinger dextrin as carbon source, hydrochloric acid is that doped source prepares chlorine doping stone Black alkene quantum dot.
2. chlorine doped graphene quantum dot solution prepared by the present invention has two transmittings under 360 nm ultraviolet excitation Peak:425 nm and 525 nm.
3. the Size Distribution of chlorine doped graphene quantum dot prepared by the present invention is homogeneous, average-size is 1.5 nm.
4. it is transparent that the present invention, which prepares chlorine doped graphene quantum dot film, the transmitance under 550 nm is up to 82%。
5. the heat endurance of chlorine doped graphene quantum dot film prepared by the present invention below 400 DEG C is fine.
6. chlorine doped graphene quantum dot film prepared by the present invention is under 360 nm ultraviolet excitation, emission peak is very It is wide(400~700 nm), corresponding CIE is(0.28,0.33).
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work, Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that the XPS based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided is composed entirely.
Fig. 2 is the PL spectrum based on chlorine doped graphene quantum dot in the case where 360 nm are excited that the embodiment of the present invention 1 is provided.
Fig. 3 is that the light-emitting film based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided is ultraviolet in 360 nm Light excite under PL spectrum.
Fig. 4 is the transmittance curve for the light-emitting film based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided.
Fig. 5 is that the heat endurance for the light-emitting film based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided is bent Line.
Embodiment
The present invention provides a kind of light-emitting film based on chlorine doped graphene quantum dot and preparation method thereof.Below in conjunction with attached The present invention is described in detail for figure and embodiment.
Embodiment 1
The g of beta-schardinger dextrin 1.0, the ml of hydrochloric acid 1.0, the ml of deionized water 25 are weighed, by its ultrasonic disperse 15 min, makes its mixing equal It is even, it is placed in flange water heating kettle, 140 DEG C are incubated 6 hours.0.22 micron of membrane filtration, 1000Da pellicle dialysis three It can obtain chlorine doped graphene quantum dot(Cl-GQDs solution).
Fig. 1 is that the XPS provided in an embodiment of the present invention based on chlorine doped graphene quantum dot is composed entirely.Fig. 2 is of the invention real The PL spectrum based on chlorine doped graphene quantum dot in the case where 360 nm are excited of example offer are provided.
11 grams of silicon resin glue is weighed, and is stirred vigorously so that silicon resin glue is well mixed;Measure Cl- made from 1 milliliter GQDs solution, instillation is well mixed to be placed in silicon resin glue, hand operated mixing 10 minutes, vacuum defoamation 5 minutes;Then measure 3 Milliliter mixed glue solution is placed in Teflon mould, is placed in preliminary drying 3 hours in 50 DEG C of bulging air-drying boxes, finally in 80 DEG C of drying 24 hours, so as to obtain the Cl-GQDs/ silicone resin films of solid-state.
Fig. 3 is that the light-emitting film based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided is ultraviolet in 360 nm Light excite under PL spectrum.Fig. 4 is the saturating of the light-emitting film based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided Cross rate curve.Fig. 5 is that the heat endurance for the light-emitting film based on chlorine doped graphene quantum dot that the embodiment of the present invention 1 is provided is bent Line.
Embodiment 2
The g of beta-schardinger dextrin 1.0, the ml of hydrochloric acid 1.5, the ml of deionized water 25 are weighed, by its ultrasonic disperse 15 min, makes its mixing equal It is even, it is placed in flange water heating kettle, 160 DEG C are incubated 6 hours.0.22 micron of membrane filtration, 1000 Da pellicle dialysis three It can obtain chlorine doped graphene quantum dot.11 grams of silicon resin glue is weighed, and is stirred vigorously so that silicon resin glue is well mixed;Amount Cl-GQDs solution made from 1.5 milliliters is taken, instillation is well mixed to be placed in silicon resin glue, and hand operated mixing 10 minutes, vacuum takes off Bubble 5 minutes;Then measure 3 milliliters of mixed glue solutions to be placed in Teflon mould, be placed in preliminary drying 3 in 50 DEG C of bulging air-drying boxes small When, finally dried 24 hours at 80 DEG C, so as to obtain the Cl-GQDs/ silicone resin films of solid-state.
Embodiment 3
The g of beta-schardinger dextrin 1.0, the ml of hydrochloric acid 2.0, the ml of deionized water 25 are weighed, by its ultrasonic disperse 15 min, makes its mixing equal It is even, it is placed in flange water heating kettle, 160 DEG C are incubated 8 hours.0.22 micron of membrane filtration, 1000 Da pellicle dialysis three It can obtain chlorine doped graphene quantum dot.11 grams of silicon resin glue is weighed, and is stirred vigorously so that silicon resin glue is well mixed;Amount Cl-GQDs solution made from 2 milliliters is taken, instillation is well mixed to be placed in silicon resin glue, hand operated mixing 10 minutes, vacuum defoamation 5 minutes;Then measure 3 milliliters of mixed glue solutions to be placed in Teflon mould, be placed in preliminary drying 3 hours in 50 DEG C of bulging air-drying boxes, It is last to be dried 24 hours at 80 DEG C, so as to obtain the Cl-GQDs/ silicone resin films of solid-state.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.

Claims (10)

1. a kind of light-emitting film based on chlorine doped graphene quantum dot, it is characterised in that:It is described to be based on chlorine doped graphene amount Carbon source is beta-schardinger dextrin in the light-emitting film of son point, and doped source is hydrochloric acid, and base material is silicones.
2. the light-emitting film according to claim 1 based on chlorine doped graphene quantum dot, it is characterised in that:β-the ring The mass ratio of dextrin and the silicones is 1:5~20.
3. the light-emitting film according to claim 2 based on chlorine doped graphene quantum dot, it is characterised in that:β-the ring The mass ratio of dextrin and the hydrochloric acid is 1:0.59~3.36.
4. a kind of preparation method of the light-emitting film based on chlorine doped graphene quantum dot, it is characterised in that comprise the following steps:
Step A:Prepare the graphene quantum dot of chlorine doping;
Step B:The graphene quantum dot that the chlorine is adulterated is mixed with silicones;
Step C:Prepare chlorine doped graphene quantum dot light emitting film.
5. the preparation method of the light-emitting film according to claim 4 based on chlorine doped graphene quantum dot, its feature exists In:The step A include it is following step by step:
Step A1:Beta-schardinger dextrin and hydrochloric acid are dissolved in deionized water, quantum dot solution is obtained;
Step A2:The quantum dot solution is incubated in 140 ~ 200 DEG C of water heating kettles;
Step A3:The step A2 products obtained are purified, the graphene quantum dot of chlorine doping is obtained.
6. the preparation method of the light-emitting film according to claim 5 based on chlorine doped graphene quantum dot, its feature exists In:Step A3 include it is following step by step:
Step A31:Filtered using 0.22 micron of filter membrane;
Step A32:Dialysed using 1000Da pellicle.
7. the preparation method of the light-emitting film according to claim 6 based on chlorine doped graphene quantum dot, its feature exists In:The graphene quantum dot that the chlorine adulterates in the step B also needs to stir after mixing with silicones and vacuum takes off Bubble.
8. the preparation method of the light-emitting film according to claim 5 based on chlorine doped graphene quantum dot, its feature exists In:The step C include it is following step by step:
Step C1:Product in step B is taken to be placed in Teflon mold;
Step C2:Preliminary drying is carried out, preliminary drying time is 2.5 ~ 4 h, and preliminary drying temperature is 45 ~ 55 DEG C;
Step C3:Dried, drying time is 22 ~ 26 h, drying temperature is 78 ~ 88 DEG C.
9. the preparation method of the light-emitting film according to claim 8 based on chlorine doped graphene quantum dot, its feature exists In:Beta-schardinger dextrin, hydrochloric acid, the mass ratio of deionized water are 1 in the step A1:0.59~3.36:20~40.
10. the preparation method of the light-emitting film according to claim 5 based on chlorine doped graphene quantum dot, its feature exists In:The graphene quantum dot of the doping of chlorine described in the step B is 1 with the mass ratio of the silicones:5~20.
CN201710254588.7A 2017-04-18 2017-04-18 A kind of light-emitting film based on chlorine doped graphene quantum dot and preparation method thereof Pending CN106967427A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108172695A (en) * 2018-01-11 2018-06-15 昆明物理研究所 The preparation method of flexible support chlorine doped graphene quantum dot film
CN108314005A (en) * 2018-03-27 2018-07-24 广西师范大学 A kind of method and its device preparing chlorine doped graphene quantum dot
CN108485659A (en) * 2018-02-12 2018-09-04 上海大学 Amphiphilic graphene quantum dot material, preparation method and its application that fluorescence probe is imaged as cell nucleus targeting
CN108795421A (en) * 2018-04-11 2018-11-13 北京科技大学 A kind of Preparation method and use of chlorine doped graphene quantum dot
KR20180130042A (en) * 2017-05-25 2018-12-06 가천대학교 산학협력단 Graphene quantum pin, manufacturing method thereof and uses thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
XUEMING LI ET AL.: "Multicolour light emission from chlorine-doped graphene quantum dots", 《JOURNAL OF MATERIALS CHEMISTRY C》 *
李吉: "功能化石墨烯及其硅树脂纳米复合材料的制备", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 *
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180130042A (en) * 2017-05-25 2018-12-06 가천대학교 산학협력단 Graphene quantum pin, manufacturing method thereof and uses thereof
KR101985726B1 (en) 2017-05-25 2019-06-05 가천대학교 산학협력단 Graphene quantum pin, manufacturing method thereof and uses thereof
CN108172695A (en) * 2018-01-11 2018-06-15 昆明物理研究所 The preparation method of flexible support chlorine doped graphene quantum dot film
CN108485659A (en) * 2018-02-12 2018-09-04 上海大学 Amphiphilic graphene quantum dot material, preparation method and its application that fluorescence probe is imaged as cell nucleus targeting
CN108485659B (en) * 2018-02-12 2021-06-04 上海大学 Amphiphilic graphene quantum dot material, preparation method and application of amphiphilic graphene quantum dot material as cell nucleus targeted imaging fluorescent probe
CN108314005A (en) * 2018-03-27 2018-07-24 广西师范大学 A kind of method and its device preparing chlorine doped graphene quantum dot
CN108795421A (en) * 2018-04-11 2018-11-13 北京科技大学 A kind of Preparation method and use of chlorine doped graphene quantum dot

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Application publication date: 20170721