CN109337682A - A kind of method that room temperature prepares fluorescent carbon quantum dot - Google Patents
A kind of method that room temperature prepares fluorescent carbon quantum dot Download PDFInfo
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- CN109337682A CN109337682A CN201811601840.8A CN201811601840A CN109337682A CN 109337682 A CN109337682 A CN 109337682A CN 201811601840 A CN201811601840 A CN 201811601840A CN 109337682 A CN109337682 A CN 109337682A
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- quantum dot
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- 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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Abstract
The invention discloses a kind of methods that room temperature prepares fluorescent carbon quantum dot, comprising: mixes carbohydrate with organic solvent, the solution or suspension of carbohydrate is made；Inorganic base is dissolved in water, inorganic alkali solution is made；The solution of the carbohydrate or suspension are added drop-wise in the inorganic alkali solution at room temperature, is vigorously stirred 12 hours, obtains reaction product mixed liquor；The reaction product is poured into separatory funnel, water removal is separated after standing 2 hours to get to the fluorescent carbon quantum dot being scattered in organic solvent.This method simple process, room temperature reaction, reaction condition is mild, and low energy consumption, good product dispersibility, and the carbon quantum dot fluorescence efficiency of preparation is high.Simple and inexpensive synthesis carbon quantum dot is realized, carbon quantum dot popularization and application are conducive to.
Description
Technical field
The present invention relates to a kind of methods that carbon quantum dot synthesis field more particularly to room temperature prepare fluorescent carbon quantum dot.
Background technique
Carbon quantum dot is that a kind of partial size is less than 10nm, the carbon-based zero dimension material with photoluminescent property.Carbon quantum dot tool
There is outstanding optical property, good water solubility, hypotoxicity, environmental-friendly, raw material sources are wide, at low cost, good biocompatibility
Many advantages, such as.Therefore, carbon quantum dot is in dye-sensitized solar cells, light emitting diode, bio-imaging, sensor, catalysis
There is important application prospect in field.Compared with traditional quantum dot, due to the nontoxicity of carbon quantum dot, in biotechnology and ring
Border application will have bigger application value.
The synthetic method of carbon quantum dot is broadly divided into two major classes: the first kind is the master by obtaining carbon quantum dot from top to bottom
If the carbon structure by bulky grain prepares carbon quantum dot.Usual such method reaction condition relatively acutely, later period disengaging time
It is long, such as the methods of electrochemical oxidation, plasma discharge, laser ablation.Second class method is by obtaining carbon from bottom to top
Quantum dot.Carbon quantum dot is prepared using the molecule of carbon elements as carbon source, usually can control size, the shape of preparation nano-sized carbon,
But the step of preparing is with regard to relative complex.
Currently, the major part of preparation is Water-soluble carbon quantum dot, and most of preparation method yield is lower, operation is multiple
Miscellaneous, the expensive application being unfavorable for of equipment, therefore how to realize that simple, economic efficiently synthesizing disperses in organic solvent
There is important value to the extensive use of propulsion.
Summary of the invention
Based on the problems of prior art, the object of the present invention is to provide a kind of room temperatures to prepare fluorescent carbon quantum dot
Method, can be with the fluorescent carbon quantum dot of relatively easy and inexpensive preparation dispersion in organic solvent.
The purpose of the present invention is what is be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of method of room temperature preparation carbon quantum dot, comprising:
Carbohydrate is mixed with organic solvent, the solution or suspension of carbohydrate is made；
Inorganic base is dissolved in water, inorganic alkali solution is made；
The solution of the carbohydrate or suspension are added drop-wise in the inorganic alkali solution at room temperature, are vigorously stirred
12 hours, obtain reaction product mixed liquor；
The reaction product is poured into separatory funnel, water removal is separated after standing 2 hours to get organic molten to being scattered in
Fluorescent carbon quantum dot in agent.
As seen from the above technical solution provided by the invention, the embodiment of the present invention provides room temperature and prepares fluorescence carbon quantum
The method of point, it has the advantage that:
This method simple process, reacts at room temperature, and reaction condition is mild, and low energy consumption, good product dispersibility, the carbon amounts of preparation
Son point fluorescence efficiency is high.The fluorescent carbon quantum dot that simple and inexpensive synthesis is scattered in organic solvent is realized, is conducive to
Carbon quantum dot promotes and applies.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the fluorescence spectra of fluorescent carbon quantum dot prepared by the embodiment of the present invention 1；
Fig. 2 is the high-resolution-ration transmission electric-lens image of fluorescent carbon quantum dot prepared by the embodiment of the present invention 2；
Fig. 3 is the high-resolution-ration transmission electric-lens image of fluorescent carbon quantum dot prepared by the embodiment of the present invention 3.
Specific embodiment
Below with reference to particular content of the invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
Belong to protection scope of the present invention.The content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field
The well known prior art.
The embodiment of the present invention provides a kind of method that room temperature prepares fluorescent carbon quantum dot, can prepare and be scattered in various solvents
Carbon quantum dot, comprising:
Carbohydrate is mixed with organic solvent, the solution or suspension of carbohydrate is made；
Inorganic base is dissolved in water, inorganic alkali solution is made；
The solution of carbohydrate or suspension are added drop-wise in inorganic alkali solution at room temperature, are vigorously stirred 12 hours,
Obtain reaction product mixed liquor；
Above-mentioned reaction product is poured into separatory funnel, water removal is separated after standing 2 hours, obtains being scattered in organic solvent
In fluorescent carbon quantum dot.
The solution of carbohydrate or suspension are added drop-wise in inorganic alkali solution by the above method at room temperature, carbon hydrate
The mass ratio of object and inorganic base is 1:200~10:1.
In the above method, carbohydrate used uses at least one of sucrose, glucose, fructose, starch；It is above-mentioned
In method, organic solvent used is using in toluene, dimethylbenzene, benzene, chloroform, methylene chloride, petroleum ether, tetrahydrofuran
It is at least one；
The inorganic alkali solution concentration is 6~0.1mol/L, and inorganic base used uses sodium hydroxide, potassium hydroxide, hydrogen
At least one of calcium oxide.
The partial size of fluorescent carbon quantum dot made from the above method is 3~10nm.
The embodiment of the present invention is specifically described in further detail below.
The method that the room temperature of the embodiment of the present invention prepares fluorescent carbon quantum dot is the organic solution by carbohydrate or is hanged
Turbid is added drop-wise in inorganic alkali solution (mass ratio of carbohydrate and inorganic base is 1:200~10:1), is vigorously stirred 12
Hour；Inorganic alkali solution concentration is 6~0.1mol/L；Obtained reactant is poured into separatory funnel, is separated after standing 2 hours
It goes to remove water, obtains being scattered in the fluorescent carbon quantum dot in organic solvent, the partial size of fluorescent carbon quantum dot obtained is 3~10nm.
In the above method, carbohydrate used in carbohydrate solutions or suspension include but is not limited to sucrose,
Glucose, fructose, starch.Organic solvent used uses toluene, dimethylbenzene, benzene, chloroform, methylene chloride, petroleum ether, four
At least one of hydrogen furans；
Inorganic base used in inorganic alkali solution includes but is not limited to sodium hydroxide, potassium hydroxide, calcium hydroxide.
The preparation method of the embodiment of the present invention, simple process, reaction condition is mild, and low energy consumption, and good product dispersibility is conducive to
Prepare with scale is scattered in the carbon quantum dot in various solvents.
Embodiment 1
The present embodiment provides a kind of methods that room temperature prepares fluorescent carbon quantum dot, comprising the following steps:
It weighs 1.8g glucose and the toluene suspension liquid for being made into glucose is added in 50ml toluene；
8g sodium hydroxide is weighed, is added in 100ml water and inorganic alkali solution is made；
Under the conditions of glucose toluene suspension drop is added in inorganic alkali solution, be vigorously stirred 12 hours and obtain reaction product
Mixed liquor；
Then above-mentioned reaction product is poured into separatory funnel, separates water removal after standing 2 hours, obtains being scattered in toluene
In carbon quantum dot, the partial size of the carbon quantum dot is 3~10nm.
The fluorescence spectrum of fluorescent carbon quantum dot prepared by the present embodiment 1 by the fluorescence spectra as shown in Figure 1, can be seen
Out, the fluorescence efficiency of the fluorescent carbon quantum dot is high.
Embodiment 2
The present embodiment provides a kind of methods that room temperature prepares fluorescent carbon quantum dot, comprising the following steps:
It weighs 1g fructose and the tetrahydrofuran solution for being made into fructose is added in 100ml tetrahydrofuran；
10g potassium hydroxide is weighed, is added in 100ml water and inorganic alkali solution is made；
The tetrahydrofuran solution of fructose is added drop-wise in inorganic alkali solution, is vigorously stirred and is obtained within 12 hours reaction product mixing
Liquid；
Then above-mentioned reaction product is poured into separatory funnel, separates water removal after standing 2 hours, obtains being scattered in tetrahydro
Carbon quantum dot in furans, the partial size of the carbon quantum dot are 3~10nm.
The high-resolution-ration transmission electric-lens image of fluorescent carbon quantum dot prepared by the present embodiment 2 is as shown in Fig. 2, can by the image
To find out, the good dispersion of the fluorescent carbon quantum dot.
Embodiment 3
The present embodiment provides a kind of methods that room temperature prepares fluorescent carbon quantum dot, comprising the following steps:
It weighs 10g sucrose and the dimethylbenzene suspension for being made into sucrose is added in 100ml dimethylbenzene；
3g calcium hydroxide is weighed, is added in 100ml water and inorganic alkali solution is made；
Under the conditions of the dimethylbenzene suspension of sucrose is added drop-wise in calcium hydroxide solution, be vigorously stirred 12 hours and reacted
Product mixture；
Then above-mentioned reaction product is poured into separatory funnel, separates water removal after standing 2 hours, obtains being scattered in diformazan
Fluorescent carbon quantum dot in benzene, the partial size of the fluorescent carbon quantum dot are 5~10nm.
The high-resolution-ration transmission electric-lens image of fluorescent carbon quantum dot prepared by the present embodiment 3 is as shown in figure 3, can by the image
To find out, the good dispersion of the carbon quantum dot.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (5)
1. a kind of method that room temperature prepares fluorescent carbon quantum dot characterized by comprising
Carbohydrate is mixed with organic solvent, the solution or suspension of carbohydrate is made；
Inorganic base is dissolved in water, inorganic alkali solution is made；
The solution of the carbohydrate or suspension are added drop-wise in the inorganic alkali solution at room temperature, it is small to be vigorously stirred 12
When, obtain reaction product mixed liquor；
The reaction product is poured into separatory funnel, water removal is separated after standing 2 hours to get to being scattered in organic solvent
Fluorescent carbon quantum dot.
2. the method that room temperature according to claim 1 prepares fluorescent carbon quantum dot, which is characterized in that in the method,
The solution of the carbohydrate or suspension are added drop-wise in the inorganic alkali solution at room temperature are as follows: the carbohydrate with
The mass ratio of inorganic base is 1:200~10:1.
3. the method that room temperature according to claim 1 or 2 prepares fluorescent carbon quantum dot, which is characterized in that in the method,
Carbohydrate used uses at least one of sucrose, glucose, fructose, starch；
Organic solvent used using toluene, dimethylbenzene, benzene, chloroform, methylene chloride, petroleum ether, in tetrahydrofuran extremely
Few one kind.
4. the method that room temperature according to claim 1 or 2 prepares fluorescent carbon quantum dot, which is characterized in that in the method,
The concentration of the inorganic alkali solution is 6~0.1mol/L；Inorganic base used uses sodium hydroxide, potassium hydroxide, calcium hydroxide
At least one of.
5. the method that room temperature according to claim 1 or 2 prepares fluorescent carbon quantum dot, which is characterized in that in the method,
The partial size of fluorescent carbon quantum dot obtained is 3~10nm.
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| CN201811601840.8A CN109337682B (en) | 2018-12-26 | 2018-12-26 | Method for preparing fluorescent carbon quantum dots at room temperature |
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| CN201811601840.8A CN109337682B (en) | 2018-12-26 | 2018-12-26 | Method for preparing fluorescent carbon quantum dots at room temperature |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386666A (en) * | 2014-10-22 | 2015-03-04 | 纪效波 | Method for preparing carbon quantum dots through alcohol decomposition |
| CN104528684A (en) * | 2014-12-10 | 2015-04-22 | 中南大学 | Method for preparing carbon quantum dot by carbonizing ketone under alkaline condition |
| CN104591129A (en) * | 2015-01-12 | 2015-05-06 | 四川大学 | Method for preparing hydrophobic carbon quantum dots on large scale under ambient temperature condition |
| CN107619034A (en) * | 2017-10-16 | 2018-01-23 | 赵方浩 | The preparation method of green fluorescence carbon quantum dot |
-
2018
- 2018-12-26 CN CN201811601840.8A patent/CN109337682B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386666A (en) * | 2014-10-22 | 2015-03-04 | 纪效波 | Method for preparing carbon quantum dots through alcohol decomposition |
| CN104528684A (en) * | 2014-12-10 | 2015-04-22 | 中南大学 | Method for preparing carbon quantum dot by carbonizing ketone under alkaline condition |
| CN104591129A (en) * | 2015-01-12 | 2015-05-06 | 四川大学 | Method for preparing hydrophobic carbon quantum dots on large scale under ambient temperature condition |
| CN107619034A (en) * | 2017-10-16 | 2018-01-23 | 赵方浩 | The preparation method of green fluorescence carbon quantum dot |
Non-Patent Citations (1)
| Title |
|---|
| XIAO, SJ 等: "Fluorescent carbon dots: facile synthesis at room temperature and its application for Fe2+ sensing", 《JOURNAL OF NANOPARTICLE RESEARCH》 * |
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