CN109486485A - A method of fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material - Google Patents
A method of fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material Download PDFInfo
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Abstract
The invention discloses a kind of methods for preparing fluorescent carbon quantum dot as carbon-based material using short chain volatile fatty acid, it is using short chain volatile fatty acid as carbon-based material, liquid nitrogen source and ultrapure water and after mixing evenly is added, carries out hydro-thermal reaction, that is, obtains target product fluorescent carbon quantum dot.Method of the invention, raw material sources are extensive and cheap, easy to operate, and preparation condition requirement is low and relatively mild, solve the problems, such as that existing fluorescent carbon quantum dot preparation method can not large-scale production because of raw material and technique limitation.
Description
Technical field
The present invention relates to a kind of method for preparing fluorescent carbon quantum dot as carbon-based material using short chain fatty acids, belonging to
Learn technical field of nano material.
Background technique
Fluorescent carbon quantum dot has as a kind of novel carbon nanomaterial and prepares simple, good light stability, bio-compatible
The advantages that property good, excitation-emission wavelength dependence, environmental monitoring, the removal of heavy metal, bio-imaging, in terms of
It has a wide range of applications.
Mainly there are several types of (1) arc discharge methods at present for the preparation method of fluorescent carbon quantum dot.Pass through arc discharge method
The carbon light quantum amount of preparation has larger oxygen content, is not necessarily to surface modification.Its purification process is complicated, and yield is lower, collects and produces
Object is relatively difficult.Such as Xu[1]Carbon nano-particle is prepared for carbon ash using arc discharge method, wherein the yield of fluorescent quantum
Have 1.6%.(2) laser ablation method.The carbon quantum dot of fluorescence is prepared with using laser ablation method, instrument is expensive, and
Need to add organic solvent to modify the surface state of carbon quantum dot.(3) electrochemical process.Electrochemical process is prepare carbon quantum dot normal
With method, researcher makes the anodic oxidation of electrolyte, then from using carbon as the work of material by the value of change potential or electric current
Make to obtain small carbon nano-particle on electrode, suspension is then obtained by centrifugation.The fluorescence nano obtained by this method
Grain has more tiny partial size, but during the preparation process, due to oxidation, increases the defect of carbon nano tube surface.(4)
Ultrasonic treatment.Using Ultrasonic treatment, the requirement to equipment is relatively low, carbon easy to operate and cheap, but obtaining
The performance of quanta point material is not sufficiently stable.(5) organic carbon method.Organic carbon method uses the side of organic matter precursor carbonization
Method prepares carbon quantum dot, can not only launch fluorescence, oil-soluble or water-soluble carbon quantum dot can also be made surface-functionalized.
Organic carbon method has the shortcomings that very much, not only has unstable fluorescence quantum yield, there are also very in the carbon quantum dot of generation
More oxygen usually will also be passivated operation.(6) template.General template all selects mesoporous silicon oxide (MS) ball, it has
The advantage that specific surface area is high, gap is uniform, plot ratio is high.But template preparation is difficult to separate carbon quantum dot with support,
Narrow distribution simultaneously, it is necessary to could be dispersed in water with ultrasonic treatment.(7) microwave method.Microwave (frequency be 300MHz~
300GHz) technology is that a kind of energy is concentrated, reacts fast, high-efficient and uniform technology of preparing, in the field of chemical synthesis using non-
Chang Duo.Wang etc.[2]Using eggshell membrane (ESM) ashes as carbon source, by microwave technology, it is prepared for partial size about 5nm and can emits
The carbon quantum dot of blue-fluorescence.(8) hydro-thermal method.Hydro-thermal method is to use water as solvent in high temperature and pressure, is with reaction kettle
Vessel, the method for synthesizing carbon nano-particle.The advantages of hydro-thermal method is that control is simple, process is easy, and simultaneous reactions kettle can be effective
Reduce the volatilization of organic matter.In addition to this, carbon quantum dot made from different solvents has different property.(9) combustion method.Combustion
The advantages of burning method is that equipment is simple, operating process is easy, and repeats operation, the disadvantage is that being difficult to control particle diameter distribution.Yuan
Deng[3]Carbon nano-particle is prepared for ethanol combustion device.
The carbon-based material for preparing raw material currently as fluorescent carbon quantum dot is varied.Patent publication No. is
The patent of invention of CN101973541A provides a kind of method that fluorescent carbon quantum dot is extracted in active carbon, is made using active powdered carbon
For carbon source, by chemical oxidation of gold and subsequent evaporation, neutralizes, centrifugation, hyperfiltration treatment, a large amount of fluorescence carbon amounts can be obtained
Sub- point.Patent publication No. is related to a kind of compound micro- based on magnetic carbon quantum dot/chitosan for the patent of invention of CN102973948B
The preparation method of the pharmaceutical carrier of ball is to pass through the microwave radiation system of reacting using glucose with polyethylene glycol mixed liquor as carbon-based material
Standby fluorescent carbon quantum dot, then magnetic carbon quantum dot composite particles are formed by electrostatic adsorption.Patent publication No. is
The patent of invention of CN103771390B discloses one kind using citric acid, citrate, glucose, fructose or amylose as carbon
Precursor passes through the method for bioactive enzyme assisted microwave synthesis method synthesizing super-strong fluorescent carbon quantum dot.Patent publication No. is
The patent of invention of CN104031642B provides a kind of fluorescent carbon quantum dot and preparation method thereof of high quantum production rate, is with shell
Glycan is carbon source, and glacial acetic acid and ethylenediamine is added as passivator.The patent of invention that patent publication No. is CN104087296B is public
A kind of method that laser irradiation prepares fluorescent carbon quantum dot has been opened, has been with one of benzene, substituted benzene or more benzene ring compounds
For carbon source.Patent publication No. is that the patent of invention of CN104629760B and CN104927847B is utilized respectively Jinhua Fingered Citron and black wood
Ear prepares fluorescent carbon quantum dot as carbon source, by hydrothermal synthesis method.Patent publication No. is the patent of invention of CN104759283A
It discloses a kind of based on copper complex formazan fluorescent carbon quantum dot and preparation method thereof.Patent publication No. is the hair of CN105067576A
Bright patent provides a kind of method for preparing fluorescent carbon quantum dot based on electrochemical techniques.Patent publication No. is CN105694879B
Patent of invention provide a kind of organic wastewater and prepare fluorescent carbon quantum dot and its coagulation recovery method, be to be with organic wastewater
Carbon source prepares fluorescent carbon quantum dot using micro-wave oven as reaction platform, recycles quanta point material using coagulation technology.Patent is public
The number of opening provides a kind of fluorescent carbon quantum dot preparation method of sulfur doping for the patent of invention of CN106829921A, is with half Guang
Propylhomoserin hydrochloride is carbon-based material.Patent publication No. provides a kind of fluorescence of N doping for the patent of invention of CN107446578A
Carbon quantum dot material preparation method is using pericarp and polyethyleneimine as carbon source and nitrogen source.
In addition to the carbon-based material of foregoing invention patent disclosure, there are also apples for the carbon-based material of existing synthesis fluorescent carbon quantum dot
Acid, chloroform, graphite powder, clay, ethyl alcohol, candle cigarette ash, octadecylamine, citric acid, starch, organic wastewater, chitosan, grape
Sugar, natural gas ash, pollen, fructose, glutaraldehyde, glycerine, fragrant hydrocarbon compound etc..The part material of above-mentioned carbon-based material is can not
The renewable sources of energy or part material is with high costs is unfavorable for continuing and large-scale production fluorescent carbon quantum dot；And organic wastewater etc. by
Aftertreatment technology unstable in the fluorescent carbon quantum dot material property of its complexity, synthesis and that needs are stringent.Therefore, one is found
The carbon-based material cheap and easy to get, that property is stable of kind helps to reduce the production cost of fluorescent carbon quantum dot material, pushes the green wood
Expect the extensive use in multiple fields.
Short chain volatile fatty acid (VFAs) includes formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid and their isomery
Body.VFAs is the intermediate product of anaerobic fermentation of organisms process, and the precursor substance of many chemicals synthesis, cheap and easy to get,
Stable components.Therefore, cost is advantageously reduced using VFAs the carbon-based material for preparing fluorescent carbon quantum dot, is realized sustainable
Quantization production, improves the stability of fluorescent carbon quantum dot material property.It discloses in the fluorescent carbon quantum dot preparation process of report
Glacial acetic acid is used as passivating material, and prepares the technology of fluorescent carbon quantum dot not yet using VFAs solution as carbon-based material
See open report.
Bibliography in above-mentioned background technique is as follows:
[1]Xu X,Ray R,Gu Y,et al.Electrophoretic analysis and purification of
fluorescent single-walled carbon nanotube fragments.[J].Journal of the
American Chemical Society,2004,126(40):12736-7.
[2]Wang Q,Liu X,Zhang L,et al.Microwave-assisted synthesis of carbon
nanodots through an eggshell membrane and their fluorescent application[J]
.The Analyst,2012,137(22):5392-5397.
[3]Yuan L,Dai J,Fan X,et al.Self-cleaning flexible infrared
nanosensor based on carbon nanoparticles[J].Acs Nano,2011,5(5):4007.
Summary of the invention
The present invention in order to avoid in place of above-mentioned the deficiencies in the prior art, provide it is a kind of be simple and efficient prepare fluorescence carbon quantum
The method of point material.
The present invention solves technical problem, adopts the following technical scheme that
The invention discloses a kind of sides that fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material
Method, it is characterized in that: it is that liquid nitrogen source and ultrapure water is added and stirs evenly using short chain volatile fatty acid as carbon-based material
Afterwards, the hydro-thermal reaction 4-10h at 160-220 DEG C, gained reaction solution obtain target after dialysing, then through vacuum freeze drying
Product fluorescent carbon quantum dot.Specifically includes the following steps:
(1) short chain volatile fatty acid is placed in the stainless steel autoclave of polytetrafluoroethyllining lining, adds liquid
State nitrogen source and ultrapure water, stir, and obtain mixed solution；
(2) reaction kettle equipped with mixed solution is placed in airtight heating device, hydro-thermal reaction 4-10h at 160-220 DEG C；
(3) after reaction, reaction kettle is taken out, natural cooling, it is the saturating of 3500Da that reaction solution, which is poured into molecular cut off,
Bag is analysed, every 6h changes a water, dialyses 3 days in glass container, obtain the aqueous solution of fluorescent carbon quantum dot；
(4) vacuum freeze drying is carried out to the aqueous solution of the fluorescent carbon quantum dot to get fluorescent carbon quantum dot powder is arrived.
Further, the short chain volatile fatty acid is formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid and its isomery
At least one of body.
Further, the liquid nitrogen source is the urea liquid that ammonium hydroxide, ethylenediamine or mass concentration are 20%-30%.
Further, the volume ratio of the short chain volatile fatty acid, liquid nitrogen source and ultrapure water is 5-15:0.5-2:3-
14.5。
Further, the airtight heating device is Muffle furnace, tube furnace or electric drying oven with forced convection.
Further, the temperature of the vacuum freeze drying is -80 DEG C.
Compared with the prior art, the beneficial effects of the present invention are embodied in:
(1) method that the present invention prepares fluorescent carbon quantum dot, raw materials used short chain volatile fatty acid (VFAs) and nitrogen source
It is general reagent, it is from a wealth of sources, cheap；
(2) method reaction condition of the invention is mild, energy conservation and environmental protection, purifying process are simple, and repeatability is high；
(3) present invention through a step hydro-thermal can volume production fluorescent carbon quantum dot, easy to operate, device therefor is easy to get；
(4) a kind of short chain volatile fatty acid (VFAs) provided by the invention prepares the recycling increment of fluorescent carbon quantum dot
Method enriches the raw material store of fluorescent carbon quantum dot preparation；
To sum up, method of the invention, technological operation is simple, raw material sources are extensive and cheap, and preparation condition requires low
And it is relatively mild, solve existing fluorescent carbon quantum dot preparation method because technique and raw material limit due to can not large-scale production ask
Topic.
Detailed description of the invention
Fig. 1 be the uv-visible absorption spectra (ABS) of fluorescent carbon quantum dot, fluorescence prepared by embodiment 1 excite (EX) and
Fluorescence emission spectrum (EM)；
Fig. 2 is fluorescence emission spectrum of the fluorescent carbon quantum dot of the preparation of embodiment 1 under 300~400nm excitation wavelength；
Fig. 3 is the infrared spectrogram of fluorescent carbon quantum dot prepared by embodiment 1；
Fig. 4 is the transmission electron microscope (Fig. 4 (a)) and grain size distribution (Fig. 4 (b)) of fluorescent carbon quantum dot prepared by embodiment 1；
Fig. 5 is the XRD spectrum figure of fluorescent carbon quantum dot prepared by embodiment 1.
Specific embodiment
It elaborates below with reference to embodiment to the present invention, following embodiments give detailed embodiment and specific
Operating process, but protection scope of the present invention is not limited to following embodiments.
Embodiment 1
The present embodiment prepares fluorescent carbon quantum dot as follows:
(1) 5mL glacial acetic acid is pipetted in ptfe autoclave, and 0.5mL ethylenediamine then is added and 14.5mL is ultrapure
Water stirs, and obtains mixed solution；
(2) reaction kettle equipped with mixed solution is placed in electric drying oven with forced convection, 200 DEG C of reaction 5h are obtained faint yellow
Solution；
(3) reaction kettle is taken out, yellow solution is transferred to the bag filter that molecular cut off is 3500Da by natural cooling
In, every 6h changes a water, dialyses 3 days, obtains the aqueous solution of pure fluorescent carbon quantum dot；
(4) aqueous solution of fluorescent carbon quantum dot is placed in -20 DEG C of refrigerators and freezes 3h, transfer to vacuum freeze drying
Machine, vacuum freeze drying 1 day is to get arriving fluorescent carbon quantum dot powder at -80 DEG C.
Fig. 1 is the uv-visible absorption spectra (ABS) of the present embodiment products therefrom, fluorescence excitation (EX) and fluorescent emission
Spectrum (EM) shows that the fluorescent carbon quantum dot of synthesis respectively has a typical absorption peak in 270nm and 320nm or so in figure.
Absorption peak at 270nm corresponds to n → π * transition of C=O, and apparent absorption peak is then due to surface defect state at 320nm
N → π * transition caused by.The best excitation peak position of the fluorescent carbon quantum dot is 380nm, and corresponding best transmitting peak position is
460nm, and the half-peak breadth of emission peak is relatively narrow (75nm).
Fig. 2 is fluorescence emission spectrum of the present embodiment products therefrom under 300~400nm excitation wavelength, it can be seen that
Under the excitation of 300~400nm, emission peak is from 450nm slight red shift to 470nm, and fluorescence intensity becomes because of exciting light
Change, this illustrates that carbon quantum dot has exciting light dependence fluorescent emission phenomenon.This phenomenon is by surface additive group (C=O/
C-NH2) (surface state) π * → n transition caused by, this is corresponding with absorption peak (n → π * transition) of absorption spectrum.From Fig. 2,
I.e. fluorescence emission spectrum is, it can be seen that fluorescent carbon quantum dot is emitted as blue region.
Fig. 3 is the infrared absorption spectrum of the present embodiment products therefrom.Characteristic absorption peak CON-H's is curved as we can see from the figure
Qu Zhendong (1560cm-1And 3294cm-1) and amide groups CO-N (1365cm-1) stretching vibration, show in the fluorescent carbon quantum dot
On there is amido functional groups.In addition, detecting C=O (1650cm-1)、O-H(1321cm-1)、C-H(2935cm-1)、C-O
(1107cm-1) and C-O-C (1043cm-1) corresponding to absorption peak.These groups come volatile fatty acid and nitrogen source.Upper figure
Show that amido bond has been formed, this dehydration and condensation reaction between carboxyl and amino is related, illustrates that nitrogen source is a kind of dopant
And surface passivator, promote the formation of fluorescent carbon quantum dot.
Fig. 4 is the TEM (Fig. 4 (a)) and grain size distribution (Fig. 4 (b)) of the present embodiment products therefrom.From fluorescent carbon quantum dot
TEM figure as can be seen that the fluorescent carbon quantum dot be the preferable black particle of monodispersity；The result table of high-resolution-ration transmission electric-lens
Bright most of particles are no crystalline state carbon particle；From the point of view of particle diameter distribution, the partial size of the fluorescent carbon quantum dot is 1.8~4.2nm, is put down
Equal partial size is 2.5nm or so.
Fig. 5 is that the XRD of the present embodiment products therefrom is composed, and map shows one 25 ° (0.34nm) Zuo You broad peak, this is
As caused by highly disordered carbon atom, illustrate that the fluorescent carbon quantum dot of synthesis is in highly disordered state, this and TEM figure
As a result corresponding.
Embodiment 2
(1) 10mL glacial acetic acid is pipetted in ptfe autoclave, and 1mL ethylenediamine and 9mL ultrapure water is then added, fills
Divide and stir evenly, obtains mixed solution；
(2) reaction kettle equipped with mixed solution is placed in electric drying oven with forced convection, 200 DEG C of reaction 8h are obtained faint yellow
Solution；
(3) reaction kettle is taken out, yellow solution is transferred to the bag filter that molecular cut off is 3500Da by natural cooling
In, every 6h changes a water, dialyses 3 days, obtains the aqueous solution of pure fluorescent carbon quantum dot；
(4) aqueous solution of fluorescent carbon quantum dot is placed in -20 DEG C of refrigerators and freezes 3h, transfer to vacuum freeze drying
Machine, vacuum freeze drying 1 day is to get arriving fluorescent carbon quantum dot powder at -80 DEG C.Through characterizing, fluorescence carbon amounts obtained by the present embodiment
The photoluminescent property of son point is similar to Example 1.
Embodiment 3
(1) 5mL propionic acid is pipetted in ptfe autoclave, and 2mL ammonium hydroxide and 13mL ultrapure water is then added, sufficiently stirs
It mixes uniformly, obtains mixed solution；
(2) reaction kettle equipped with mixed solution is placed in electric drying oven with forced convection, 220 DEG C of reaction 8h are obtained faint yellow
Solution；
(3) reaction kettle is taken out, yellow solution is transferred to the bag filter that molecular cut off is 3500Da by natural cooling
In, every 6h changes a water, dialyses 3 days, obtains the aqueous solution of pure fluorescent carbon quantum dot；
(4) aqueous solution of fluorescent carbon quantum dot is placed in -20 DEG C of refrigerators and freezes 3h, transfer to vacuum freeze drying
Machine, vacuum freeze drying 1 day is to get arriving fluorescent carbon quantum dot powder at -80 DEG C.Through characterizing, fluorescence carbon amounts obtained by the present embodiment
The photoluminescent property of son point is similar to Example 1.
Embodiment 4
(1) 2mL glacial acetic acid, 3mL propionic acid, 5mL butyric acid are pipetted in ptfe autoclave, 1mL second two is then added
Amine and 9mL ultrapure water, stir, and obtain mixed solution；
(2) reaction kettle equipped with mixed solution is placed in electric drying oven with forced convection, 180 DEG C of reaction 6h are obtained faint yellow
Solution；
(3) reaction kettle is taken out, yellow solution is transferred to the bag filter that molecular cut off is 3500Da by natural cooling
In, every 6h changes a water, dialyses 3 days, obtains the aqueous solution of pure fluorescent carbon quantum dot；
(4) aqueous solution of fluorescent carbon quantum dot is placed in -20 DEG C of refrigerators and freezes 3h, transfer to vacuum freeze drying
Machine, vacuum freeze drying 1 day is to get arriving fluorescent carbon quantum dot powder at -80 DEG C.Through characterizing, fluorescence carbon amounts obtained by the present embodiment
The photoluminescent property of son point is similar to Example 1.
Embodiment 5
(1) 5mL propionic acid, 5mL butyric acid are pipetted in ptfe autoclave, 2mL ammonium hydroxide then is added and 8mL is ultrapure
Water stirs, and obtains mixed solution；
(2) reaction kettle equipped with mixed solution is placed in electric drying oven with forced convection, 220 DEG C of reaction 8h are obtained faint yellow
Solution；
(3) reaction kettle is taken out, yellow solution is transferred to the bag filter that molecular cut off is 3500Da by natural cooling
In, every 6h changes a water, dialyses 3 days, obtains the aqueous solution of pure fluorescent carbon quantum dot；
(4) aqueous solution of fluorescent carbon quantum dot is placed in -20 DEG C of refrigerators and freezes 3h, transfer to vacuum freeze drying
Machine, vacuum freeze drying 1 day is to get arriving fluorescent carbon quantum dot powder at -80 DEG C.Through characterizing, fluorescence carbon amounts obtained by the present embodiment
The photoluminescent property of son point is similar to Example 1.
Claims (9)
1. a kind of method for preparing fluorescent carbon quantum dot as carbon-based material using short chain volatile fatty acid, it is characterised in that:
It is liquid nitrogen source and ultrapure water and after mixing evenly to be added, progress hydro-thermal is anti-using short chain volatile fatty acid as carbon-based material
It answers, gained reaction solution is post-treated, i.e. acquisition target product fluorescent carbon quantum dot.
2. according to claim 1 a kind of fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material
Method, it is characterised in that: the temperature of the hydro-thermal reaction is 160-220 DEG C, time 4-10h.
3. according to claim 1 a kind of fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material
Method, it is characterised in that: the post-processing is after dialysing to reaction solution, then carries out vacuum freeze drying.
4. according to claim 1,2 or 3 a kind of fluorescent carbon is prepared using short chain volatile fatty acid as carbon-based material
The method of quantum dot, which comprises the following steps:
(1) short chain volatile fatty acid is placed in the stainless steel autoclave of polytetrafluoroethyllining lining, adds liquid nitrogen
Source and ultrapure water, stir, and obtain mixed solution；
(2) reaction kettle equipped with mixed solution is placed in airtight heating device, hydro-thermal reaction 4-10h at 160-220 DEG C；
(3) after reaction, reaction kettle is taken out, reaction solution is poured into the bag filter that molecular cut off is 3500Da by natural cooling,
Every 6h changes a water, dialyses 3 days in glass container, obtains the aqueous solution of fluorescent carbon quantum dot；
(4) vacuum freeze drying is carried out to the aqueous solution of the fluorescent carbon quantum dot to get fluorescent carbon quantum dot powder is arrived.
5. according to claim 1,2 or 3 a kind of fluorescent carbon is prepared using short chain volatile fatty acid as carbon-based material
The method of quantum dot, it is characterised in that: the short chain volatile fatty acid be formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid and
At least one of its isomers.
6. according to claim 1,2 or 3 a kind of fluorescent carbon is prepared using short chain volatile fatty acid as carbon-based material
The method of quantum dot, it is characterised in that: the liquid nitrogen source is the urea that ammonium hydroxide, ethylenediamine or mass concentration are 20%-30%
Solution.
7. according to claim 1,2 or 3 a kind of fluorescent carbon is prepared using short chain volatile fatty acid as carbon-based material
The method of quantum dot, it is characterised in that: the volume ratio of the short chain volatile fatty acid, liquid nitrogen source and ultrapure water is 5-15:
0.5-2:3-14.5.
8. according to claim 4 a kind of fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material
Method, it is characterised in that: the airtight heating device be Muffle furnace, tube furnace or electric drying oven with forced convection.
9. according to claim 4 a kind of fluorescent carbon quantum dot is prepared using short chain volatile fatty acid as carbon-based material
Method, it is characterised in that: the vacuum freeze drying temperature be -80 DEG C.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756675A (en) * | 2014-01-17 | 2014-04-30 | 西安亚博生物技术有限公司 | Nitrogen doped carbon quantum dot as well as preparation method and application thereof |
| CN105647526A (en) * | 2015-12-30 | 2016-06-08 | 五邑大学 | Near-full-spectrum fluorescent nanocarbon dots and preparation method thereof |
| CN108128767A (en) * | 2018-01-03 | 2018-06-08 | 辽宁大学 | A kind of method and its application that carbon quantum dot is quickly prepared in room temperature environment |
-
2018
- 2018-11-27 CN CN201811431532.5A patent/CN109486485A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756675A (en) * | 2014-01-17 | 2014-04-30 | 西安亚博生物技术有限公司 | Nitrogen doped carbon quantum dot as well as preparation method and application thereof |
| CN105647526A (en) * | 2015-12-30 | 2016-06-08 | 五邑大学 | Near-full-spectrum fluorescent nanocarbon dots and preparation method thereof |
| CN108128767A (en) * | 2018-01-03 | 2018-06-08 | 辽宁大学 | A kind of method and its application that carbon quantum dot is quickly prepared in room temperature environment |
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Application publication date: 20190319 |