CN110016338A - The preparation method and its product of a kind of biomass N doping carbon dots and application - Google Patents
The preparation method and its product of a kind of biomass N doping carbon dots and application Download PDFInfo
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- CN110016338A CN110016338A CN201811465409.5A CN201811465409A CN110016338A CN 110016338 A CN110016338 A CN 110016338A CN 201811465409 A CN201811465409 A CN 201811465409A CN 110016338 A CN110016338 A CN 110016338A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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Abstract
The purpose of the present invention is to solve technical problems present in existing carbon dots preparation method, and propose a kind of preparation method of biomass N doping carbon dots, include the following steps: that (1) makes sugar acid compound and diamine compounds haptoreaction, carbon dots are made and disperse solution；(2) product handling system is carried out to the carbon dots dispersion solution that step (1) obtains, obtains the biomass N doping carbon dots.The method of the present invention not only enormously simplifies the preparation method of carbon dots, also significantly on the conversion ratio for improving biomass former material and expecting carbon dots, a possibility that achieving industrialization production is bigger.Carbon dots particle shape prepared by the present invention is good, uniform particle sizes, in the sunlight without any trace, clear printing curve to can be observed in the UV lamp in fluorescent printing.
Description
Technical field
The invention belongs to carbon quantum dot technical field, it is related to a kind of preparation method of biomass N doping carbon dots, and its produces
Object and the application in terms of fluorescent printing.
Background technique
Fluorescence semiconductor quantum dots are obtained in multiple fields such as bio-imaging, cell marking, reactive tracing, electronic imagings
Extensive use is arrived, but its bring heavy metal pollution is inevitable.Therefore the Clemson at the beginning of 21 century
The scientist of University researches and develops produce a kind of Novel Carbon Nanomaterials for the first time --- carbon quantum dot (CQDs), carbon quantum dot
It begins with and is more and more widely used in biological fields such as cell markings.And compared with traditional semiconductor-quantum-point, carbon quantum
Point possesses the good characteristics such as hypotoxicity, photostability, bio-compatibility, thus bio-imaging, analysis detection, photochemical catalyst,
The various aspects such as anti-counterfeiting mark have wide application.Biological material has larger as renewable pollution-free resource as carbon source simultaneously
Advantage, therefore biological material has wide application in terms of carbon quantum dot preparation.Existing carbon quantum dot method has laser
Corrode the top-down synthetic method such as method, electrochemical process, arc discharge and chemical oxidization method, template, thermal decomposition method
Deng synthetic method from bottom to top.Hydro-thermal method, using aqueous solution as reaction medium, is passed through in special closed reactor
Reaction vessel is heated, a high temperature, reaction under high pressure environment are created, so that indissoluble or insoluble substance are dissolved in water.It is making
Other chemical reagent are not needed in standby carbon dots reaction, it is more environmentally protective.
In recent years, the carbon quantum dot preparation based on biomass matrix has attracted people's note that more and more biomass
Matrix has obtained more extensive development and utilization in preparation carbon dots.But presently, there are biomass-based carbon dots mostly
The problems such as that there are conversion ratios is low, low output.Select the sugar acid compound with carboxyl structure as carbon source, sugar acid compound
It is from a wealth of sources, cheap including sodium alginate, sodium carboxymethylcellulose, gluconic acid etc., and react can achieve it is close
Absolutely conversion ratio.Therefore this experimental selection is to come from sugar acid compound as carbon source raw material, in environmentally protective water
Under heat treatment condition, it is prepared the carbon quantum dot with fluorescence property, process flow is extremely simple, low manufacture cost, green
Environmental protection.It is not only that waste and old biomass resource utilization provides a new approach and provides a kind of new think of for preparation carbon quantum dot
Road.Along with the continuous development of information age, the true and false in information exchanging process distinguishes the attention for causing people, by it is low at
The biomass carbon dots of this high yield are used for fluorescent ink, very good solution this problem, for the hair of fluorescence falsification preventing material from now on
Exhibition provides new thinking.
Summary of the invention
The purpose of the present invention is to solve technical problems present in existing carbon dots preparation method, and propose a kind of carbon
The environment-friendly preparation method thereof of point, the method for the present invention not only enormously simplify the preparation method of carbon dots, also significantly on raising
A possibility that biomass former material expects the conversion ratio of carbon dots, achieves industrialization production is bigger.Carbon dots prepared by the present invention
For the biomass carbon dots with N doping, it is used in fluorescent printing, it is considerable in the UV lamp in the sunlight without any trace
Observe clear printing curve.
According to an aspect of the invention, there is provided a kind of preparation method of biomass N doping carbon dots, including walk as follows
It is rapid:
(1) make sugar acid compound and diamine compounds haptoreaction, carbon dots are made and disperse solution；
(2) product handling system is carried out to the carbon dots dispersion solution that step (1) obtains, obtains the biomass N doping carbon dots.
According to certain embodiments of the present invention, the quality of the sugar acid compound and the volume of diamine compounds it
Than for (1-4) g:(1-8) mL, preferably (2-3) g:(5-6) mL.
According to the preferred embodiment of the present invention, the carbonic acid class compound includes sodium alginate, sodium carboxymethylcellulose
At least one of with gluconic acid, preferably sodium alginate.
According to certain embodiments of the present invention, the diamine compounds include ethylenediamine, propane diamine, butanediamine, penta
At least one of diamines and hexamethylene diamine, preferably ethylenediamine.
According to the preferred embodiment of the present invention, the reaction temperature in the step (1) is 150-210 DEG C, preferably
180-190℃。
Preferred embodiment in accordance with the present invention, the reaction time in the step (1) are 2-10h, preferably 2-6h.
According to some embodiments of the present invention, the step (1) can carry out in accordance with the following methods: by sodium alginate, second two
Amine and water are uniformly mixed, and are placed in reaction unit, and 2 to 10h are reacted at 150 to 210 DEG C, obtains dark brown transparency liquid, i.e.,
Disperse solution for carbon dots.
According to certain embodiments of the present invention, the step (2) the following steps are included:
(A) solution freezing processing is dispersed to the carbon dots that step (1) obtains；
(B) freeze-drying process is carried out to the resulting product of step (A), obtains carbon dots solid.
Preferred embodiment in accordance with the present invention, the temperature of freezing processing is at -40 DEG C or less in the step (A).
According to the preferred embodiment of the present invention, the time of freezing processing is 0.5 to 3h in the step (A).
According to some embodiments of the present invention, the time being freeze-dried in the step (B) is 12 to for 24 hours.
After step (A) freezing, directly it is freeze-dried at such a temperature, the biomass N doping carbon dots is made.
According to another aspect of the present invention, a kind of biomass nitrogen-doped carbon prepared according to above-mentioned preparation method is provided
Point, the partial size of the carbon dots are 3 to 7nm, and fluorescence exciting wavelength is 300 to 500nm, and launch wavelength is 350 to 550nm.This hair
The carbon dots particle shape of bright preparation is good, uniform particle sizes.
According to another aspect of the present invention, a kind of fluorescent ink, including above-mentioned biomass N doping carbon dots are provided.
According to another aspect of the present invention, a kind of above-mentioned biomass N doping carbon dots are provided in terms of fluorescent printing
Using.Carbon dots prepared by the present invention in the sunlight without any trace, can be observed clear in fluorescent printing in the UV lamp
Clear printing curve.
The invention has the following advantages over the prior art:
1, sodium alginate is from a wealth of sources as biomass raw material, cheap.
2, carbon dots reaction process conversion ratio is high, and yield is big.
3, carbon dots preparation process is simple and convenient to operate, is pollution-free.One step hydro-thermal reaction product requires no any processing i.e.
For fluorescent carbon point.
Detailed description of the invention
Fig. 1 (a) is that (excitation wavelength is for the transmitting spectrogram of the carbon dots dispersion solution prepared according to the embodiment of the present invention 1
340nm)；Fig. 1 (b) is that (launch wavelength is for the excitation spectrogram of the carbon dots dispersion solution prepared according to the embodiment of the present invention 1
410nm)；Fig. 1 (c) is the picture that the carbon dots dispersion solution prepared according to the embodiment of the present invention 1 is irradiated at ultraviolet lamp (365nm)
(transmitting blue light)；
Fig. 2 is the carbon dots transmission electron microscope figure prepared according to the embodiment of the present invention 1, and the average grain diameter of carbon dots is in figure
5nm；
Fig. 3 is that the carbon dots prepared according to the embodiment of the present invention 1 carry out feelings of the picture of fluorescent printing under ultraviolet light irradiation
Condition.
Specific embodiment
The present invention is further elaborated below in conjunction with the drawings and specific embodiments:
Embodiment 1
Sodium alginate 3g is weighed, 5mL ethylenediamine, 200mL distilled water is measured, is placed in 350mL hydrothermal reaction kettle, 180 DEG C
2h is reacted, gained dark brown transparency liquid is that carbon dots dispersion solution is freeze-dried black after freezing one hour at -40 DEG C
Brown solid, as carbon dots, measuring solid productivity is 98.5%.
Embodiment 2
Sodium alginate 3g is weighed, 5mL ethylenediamine, 200mL distilled water is measured, is placed in 350mL hydrothermal reaction kettle, 180 DEG C
4h is reacted, gained dark brown transparency liquid is that carbon dots dispersion solution is freeze-dried black after freezing one hour at -40 DEG C
Brown solid, as carbon dots, measuring solid productivity is 98%.
Embodiment 3
Sodium alginate 3g is weighed, 5mL ethylenediamine, 200mL distilled water is measured, is placed in 350mL hydrothermal reaction kettle, 180 DEG C
6h is reacted, gained dark brown transparency liquid is that carbon dots dispersion solution is freeze-dried black after freezing one hour at -40 DEG C
Brown solid, as carbon dots, measuring solid productivity is 99%.
Embodiment 4
Sodium carboxymethylcellulose 3g is weighed, 5mL ethylenediamine, 200mL distilled water is measured, is placed in 350mL hydrothermal reaction kettle
In, 180 DEG C of reaction 2h, gained dark brown transparency liquid is carbon dots dispersion solution, after being freezed one hour at -40 DEG C, freezing
Dry dark brown solid, as carbon dots, measuring solid productivity is 98%.
Embodiment 5
Sodium carboxymethylcellulose 3g is weighed, 5mL ethylenediamine, 200mL distilled water is measured, is placed in 350mL hydrothermal reaction kettle
In, 180 DEG C of reaction 4h, gained dark brown transparency liquid is carbon dots dispersion solution, after being freezed one hour at -40 DEG C, freezing
Dry dark brown solid, as carbon dots, measuring solid productivity is 97%.
Any numerical value mentioned in the present invention, if between any minimum and any highest value be there are two
The interval of unit then includes each all values for increasing a unit from minimum to peak.For example, if stating one kind
The value of the state-variables such as the amount of component, or temperature, pressure, time is 50-90, in the present specification it means that specific
List 51-89,52-88 ... and the numerical value such as 69-71 and 70-71.For the value of non-integer, can with due regard to
0.1,0.01,0.001 or 0.0001 is a unit.This is only some special examples indicated.In this application, with similar side
The all possible combinations of formula, the numerical value between cited minimum and peak are considered to have disclosed.
It should be noted that embodiment described above for explaining only the invention, is not constituted to of the invention any
Limitation.By referring to exemplary embodiments, invention has been described, it should be appreciated that word used in it is descriptive
With explanatory vocabulary, rather than limited vocabulary.The present invention can be made within the scope of the claims by regulation
Modification, and the present invention is revised in without departing substantially from scope and spirit of the present invention.Although the present invention described in it relates to
And specific method, material and embodiment, it is not intended that the present invention is limited to particular case disclosed in it, on the contrary, this hair
It is bright to can be extended to other all methods and applications with the same function.
Claims (10)
1. a kind of preparation method of biomass N doping carbon dots, includes the following steps:
(1) make sugar acid compound and diamine compounds haptoreaction, carbon dots are made and disperse solution；
(2) product handling system is carried out to the carbon dots dispersion solution that step (1) obtains, obtains the biomass N doping carbon dots.
2. preparation method according to claim 1, which is characterized in that the quality and Diamines of the sugar acid compound
Closing the ratio between volume of object is (1-4) g:(1-8) mL, preferably (2-3) g:(5-6) mL.
3. preparation method according to claim 1 or 2, which is characterized in that the carbonic acid class compound include sodium alginate,
At least one of sodium carboxymethylcellulose and gluconic acid, preferably sodium alginate.
4. preparation method described in any one of -3 according to claim 1, the diamine compounds include ethylenediamine, the third two
At least one of amine, butanediamine, pentanediamine and hexamethylene diamine, preferably ethylenediamine.
5. preparation method described in any one of -4 according to claim 1, which is characterized in that the reaction in the step (1)
Temperature is 150-210 DEG C, preferably 170-190 DEG C.
6. preparation method described in any one of -5 according to claim 1, which is characterized in that reaction time 2-10h, preferably
For 2-6h.
7. preparation method described in any one of -4 according to claim 1, which is characterized in that the step (2) includes
Freeze-drying process is carried out to carbon dots dispersion solution, obtains carbon dots solid.
8. the biomass N doping carbon dots of preparation method preparation according to any one of claims 1-7, feature exist
In the partial size of the carbon dots is 3 to 7nm, and fluorescence exciting wavelength is 300 to 500nm, and launch wavelength is 350 to 550nm, fluorescence
Quantum yield reaches 20%.
9. a kind of fluorescent ink, the biomass N doping including the preparation of preparation method described in any one of claim 1-7
Carbon dots or biomass N doping carbon dots according to any one of claims 8.
10. the biomass N doping carbon dots or right of preparation method preparation according to any one of claims 1-7 are wanted
The application of biomass N doping carbon dots or fluorescent ink as claimed in claim 9 in terms of fluorescent printing described in asking 8.
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| CN201811465409.5A CN110016338A (en) | 2018-12-03 | 2018-12-03 | The preparation method and its product of a kind of biomass N doping carbon dots and application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111592881A (en) * | 2020-05-29 | 2020-08-28 | 四川大学 | Carbon quantum dot capable of rapidly marking cell nucleus and preparation method and application thereof |
| CN116285966A (en) * | 2022-09-07 | 2023-06-23 | 广东信科检测有限公司 | Preparation method of fluorescent carbon quantum dot and application of fluorescent carbon quantum dot in detection of silver ions |
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| CN107118113A (en) * | 2017-06-09 | 2017-09-01 | 郑州轻工业学院 | A kind of preparation method of water-soluble quaternary ammonium cationic fluorescent carbon point |
| CN108456519A (en) * | 2018-07-06 | 2018-08-28 | 大连工业大学 | A kind of N doping fluorescent carbon quantum dot and preparation method thereof |
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2018
- 2018-12-03 CN CN201811465409.5A patent/CN110016338A/en active Pending
Patent Citations (2)
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| CN107118113A (en) * | 2017-06-09 | 2017-09-01 | 郑州轻工业学院 | A kind of preparation method of water-soluble quaternary ammonium cationic fluorescent carbon point |
| CN108456519A (en) * | 2018-07-06 | 2018-08-28 | 大连工业大学 | A kind of N doping fluorescent carbon quantum dot and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111592881A (en) * | 2020-05-29 | 2020-08-28 | 四川大学 | Carbon quantum dot capable of rapidly marking cell nucleus and preparation method and application thereof |
| CN111592881B (en) * | 2020-05-29 | 2022-10-11 | 四川大学 | Carbon quantum dot capable of rapidly marking cell nucleus and preparation method and application thereof |
| CN116285966A (en) * | 2022-09-07 | 2023-06-23 | 广东信科检测有限公司 | Preparation method of fluorescent carbon quantum dot and application of fluorescent carbon quantum dot in detection of silver ions |
| CN116285966B (en) * | 2022-09-07 | 2024-01-16 | 广东信科检测有限公司 | Preparation method of fluorescent carbon quantum dot and application of fluorescent carbon quantum dot in detection of silver ions |
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