CN108659830A - A method of fluorescent carbon point is prepared based on chalina - Google Patents
A method of fluorescent carbon point is prepared based on chalina Download PDFInfo
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- CN108659830A CN108659830A CN201810249824.0A CN201810249824A CN108659830A CN 108659830 A CN108659830 A CN 108659830A CN 201810249824 A CN201810249824 A CN 201810249824A CN 108659830 A CN108659830 A CN 108659830A
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- chalina
- reaction
- carbon point
- fluorescent carbon
- small size
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/65—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Abstract
The invention discloses a kind of methods preparing fluorescent carbon point based on chalina.Its key problem in technology is to use chalina for carbon source, and the carbon dots with fluorescent effect are prepared using hydrothermal synthesis method.Advantage is：(1) chalina natural green is pollution-free, derives from a wealth of sources, cheap and easy to get；(2) reaction condition is simple, low for equipment requirements, and preparation method is simple；(3) carbon dots prepared by have water solubility well, are applicable to biomarker, medical imaging, photoelectric material etc.：(4) safety and steady is reacted, the flames of anger, smog generate, and are easy industry amplification.
Description
One technical field
The present invention relates to field of nanometer material technology, and in particular to a method of fluorescent carbon point is prepared based on chalina.
Two background technologies
Carbon dots are in recent years after carbon nanotube, Nano diamond, the latter New Type of Carbon nano-functional material of graphene.Carbon
Synthesis is to isolate and purify to obtain from single-walled carbon nanotube by electrophoresis in 2004 by Xu etc. to point for the first time.Then, Sun in 2006
Carbon target is etched Deng using laser, then after nitric acid reflux oxidation and polyethylene glycol passivation, it is same to obtain carbon nano-particle and claim
Be carbon dots.The diameter of carbon dots is generally less than 10nm, is a kind of hybrid inorganic-organic materials, meanwhile, because itself is without containing gold
Belong to element, has the features such as hypotoxicity, environmentally friendly.Carbon dots are due to the fluorescence to match in excellence or beauty with conventional semiconductors quantum dot
Can and hypotoxicity, started alternative semiconductors quantum dot and be widely used in various fields, such as analyze detection, bio-imaging,
The fields such as photocatalysis and electro-catalysis.
In recent years, the excellent properties of carbon dots cause people and more pay close attention to, and the method for preparing carbon dots is broadly divided at present
Two major classes：Method and from bottom to top method from top to bottom." method from top to bottom " be mainly by macroscopic view carbon structure material by fracture,
The means of crushing obtain the carbon of small molecule, are also both carbon dots.So far, from top to bottom secondary method mainly include arc discharge method,
Laser ablation method, electrochemical oxidation process, chemical oxidization method, hydrothermal decomposition method etc.." method from bottom to top " mainly passes through will be organic
Small molecule polymerize to obtain carbon dots as presoma.At this stage, method includes mainly microwave method, combustion method, template etc. from bottom to top.
Although the method for preparing carbon dots at present is very abundant, presently, there are cost of material height, severe reaction conditions pair to set for these methods
It is standby to require the shortcomings of high, process is complicated.Therefore, find a kind of cheap, method is simple, environmentally protective prepares fluorescent carbon point
Method.
Chalina has many advantages, such as to derive from a wealth of sources, is cheap and easy to get as a kind of agricultural wastes, contains and prepares carbon dots institute
Necessary element, is a kind of desirable feedstock for preparing carbon dots, and the present invention first will put the large-sized chalina cleaned up
Enter cutting in grass chopper and obtains the chalina of small size；Then the chalina of small size and ethyl alcohol are mixed be put into reaction kettle in
Certain thermotonus is for a period of time；Ethanol solution then is obtained by filtration in the disintegrating slag after reaction, ethanol solution is passed through into chromatography
Column filters the carbon dots solution that can be obtained yellow fluorescence.
Three invention contents
It is an object of the invention to propose that a kind of raw material is easy to get, equipment requirement is low, environmentally protective fluorescent carbon point preparation side
Method.
Realize that the technical solution of the object of the invention is：
1) the large-sized chalina cleaned up is put into cutting in grass chopper and obtains the chalina of small size；
2) chalina of small size and ethyl alcohol are mixed and is put into reaction kettle in certain thermotonus for a period of time；
3) ethanol solution is obtained by filtration in the disintegrating slag after reaction, ethanol solution is can be obtained into yellow by chromatographic column filtering
The carbon dots solution of fluorescence.
2, a kind of method that fluorescent carbon point is prepared based on chalina according to claim 1, it is characterised in that：Step
(1) in, the rotating speed of cutting machine is 12000r/min, and the chalina length of time 1h, small size are less than 1cm.
3, a kind of method that fluorescent carbon point is prepared based on chalina according to claim 1, it is characterised in that：Step
(2) in, the ratio of chalina and ethyl alcohol is 4-6g chalinas/40ml ethyl alcohol
4, a kind of method that fluorescent carbon point is prepared based on chalina according to claim 1, it is characterised in that：Step
(2) in, the reaction temperature of the mixed solution of chalina and ethyl alcohol in reaction kettle is 160-220 DEG C, reaction time 6-12h
5, a kind of method that fluorescent carbon point is prepared based on chalina according to claim 1, it is characterised in that：Step
(3) in, the mixed solution that eluant, eluent used is dichloromethane and methanol, mixed proportion 1: 1-1: 2 are filtered.
Compared with prior art, the present invention advantage is：(1) chalina natural green is pollution-free, derives from a wealth of sources, inexpensive easy
；(2) reaction condition is simple, low for equipment requirements, and preparation method is simple；(3) carbon dots prepared by have water-soluble well
Property, it is applicable to biomarker, medical imaging, photoelectric material etc.：(4) safety and steady is reacted, the flames of anger, smog are generated, is easy
Industry amplification.
Four description of the drawings
Fig. 1 is scattered in ethanol solution the pictorial diagram under daylight and ultraviolet light respectively for sample prepared by embodiment 1；
Fig. 2 is outside the solid violet of sample being scattered in ethanol solution prepared by embodiment 1 and fluorescent liquid figure；
Five specific implementation modes
The present invention will be further described for the following examples, and the purpose is to can be best understood from present disclosure.But
It is that embodiment does not limit the scope of the invention in any way.The technical staff of this professional domain is in scope of the invention as claimed
The modifications and adaptations inside made should also belong to the right and protection domain of the present invention.
Embodiment 1
The large-sized chalina cleaned up is put into cutting in grass chopper (12000r/min, 1h) and obtains small size
Chalina (length is less than 1cm)；By the chalina of small size and alcohol mixed solution, (4g chalinas/40ml ethyl alcohol, are put into reaction
In kettle 12h is reacted in 160 DEG C；Ethanol solution is obtained by filtration in disintegrating slag after reaction, ethanol solution is passed through into eluant, eluent (dichloromethane
Alkane: methanol=1: 2) filtering can be obtained the carbon dots solution of yellow fluorescence.
Embodiment 2
The large-sized chalina cleaned up is put into cutting in grass chopper (12000r/min, 1h) and obtains small size
Chalina (length is less than 1cm)；The chalina of small size and alcohol mixed solution (4g chalinas/40ml ethyl alcohol) are put into reaction
In kettle 10h is reacted in 180 DEG C；Ethanol solution is obtained by filtration in disintegrating slag after reaction, ethanol solution is passed through into eluant, eluent (dichloromethane
Alkane: methanol=1: 2) filtering can be obtained the carbon dots solution of yellow fluorescence.
Embodiment 3
The large-sized chalina cleaned up is put into cutting in grass chopper (12000r/min, 1h) and obtains small size
Chalina (length is less than 1cm)；The chalina of small size and alcohol mixed solution (4g chalinas/40ml ethyl alcohol) are put into reaction
In kettle 8h is reacted in 200 DEG C；Ethanol solution is obtained by filtration in disintegrating slag after reaction, ethanol solution is passed through into eluant, eluent (dichloromethane
Alkane: methanol=1: 2) filtering can be obtained the carbon dots solution of yellow fluorescence.
Embodiment 4
The large-sized chalina cleaned up is put into cutting in grass chopper (12000r/min, 1h) and obtains small size
Chalina (length is less than 1cm)；The chalina of small size and alcohol mixed solution (4g chalinas/40ml ethyl alcohol) are put into reaction
In kettle 6h is reacted in 220 DEG C；Ethanol solution is obtained by filtration in disintegrating slag after reaction, ethanol solution is passed through into eluant, eluent (dichloromethane
Alkane: methanol=1: 2) filtering can be obtained the carbon dots solution of yellow fluorescence.
Embodiment 5
The large-sized chalina cleaned up is put into cutting in grass chopper (12000r/min, 1h) and obtains small size
Chalina (length is less than 1cm)；The chalina of small size and alcohol mixed solution (5g chalinas/40ml ethyl alcohol) are put into reaction
In kettle 12h is reacted in 160 DEG C；Ethanol solution is obtained by filtration in disintegrating slag after reaction, ethanol solution is passed through into eluant, eluent (dichloromethane
Alkane: methanol=1: 1.5) filtering can be obtained the carbon dots solution of yellow fluorescence.
Embodiment 6
The large-sized chalina cleaned up is put into cutting in grass chopper (12000r/min, 1h) and obtains small size
Chalina (length is less than 1cm)；The chalina of small size and alcohol mixed solution (6g chalinas/40ml ethyl alcohol) are put into reaction
In kettle 6h is reacted in 220 DEG C；Ethanol solution is obtained by filtration in disintegrating slag after reaction, ethanol solution is passed through into eluant, eluent (dichloromethane
Alkane: methanol=1: 2) filtering can be obtained the carbon dots solution of yellow fluorescence.
Claims (5)
1. a method of fluorescent carbon point is prepared based on chalina, it is characterised in that：
1) the large-sized chalina cleaned up is put into cutting in grass chopper and obtains the chalina of small size；
2) chalina of small size and ethanol solution are mixed and is put into reaction kettle in certain thermotonus for a period of time；
3) ethanol solution is obtained by filtration in the disintegrating slag after reaction, ethanol solution is can be obtained into yellow fluorescence by chromatographic column filtering
Carbon dots solution.
2. a kind of method preparing fluorescent carbon point based on chalina according to claim 1, it is characterised in that：Step (1)
In, the rotating speed of cutting machine is 12000r/min, and the chalina length of time 1h, small size are less than 1cm.
3. a kind of method preparing fluorescent carbon point based on chalina according to claim 1, it is characterised in that：Step (2)
In, the ratio of chalina and ethyl alcohol is 4-6g chalinas/40ml ethyl alcohol.
4. a kind of method preparing fluorescent carbon point based on chalina according to claim 1, it is characterised in that：Step (2)
In, the reaction temperature of the mixed solution of chalina and ethyl alcohol in reaction kettle is 160-220 DEG C, reaction time 6-12h.
5. a kind of method preparing fluorescent carbon point based on chalina according to claim 1, it is characterised in that：Step (3)
In, filter the mixed solution that eluant, eluent used is dichloromethane and methanol, mixed proportion 1: 1-1: 2.
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| CN201810249824.0A CN108659830A (en) | 2018-06-01 | 2018-06-01 | A method of fluorescent carbon point is prepared based on chalina |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974750A (en) * | 2015-07-23 | 2015-10-14 | 太原理工大学 | Method for preparing carbon quantum dots by virtue of polyethyleneimine decomposition |
| CN108083259A (en) * | 2018-01-11 | 2018-05-29 | 史书亭 | The preparation method of carbon quantum dot |
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- 2018-06-01 CN CN201810249824.0A patent/CN108659830A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974750A (en) * | 2015-07-23 | 2015-10-14 | 太原理工大学 | Method for preparing carbon quantum dots by virtue of polyethyleneimine decomposition |
| CN108083259A (en) * | 2018-01-11 | 2018-05-29 | 史书亭 | The preparation method of carbon quantum dot |
Non-Patent Citations (1)
| Title |
|---|
| YUTING LUAN ET AL.: "A hierarchical porous carbon material from a loofah sponge network for high performance supercapacitors", 《RSC ADV.》 * |
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Application publication date: 20181016 |