CN115851269A - Method for preparing fluorescent carbon quantum dots by using waste PET and application of fluorescent carbon quantum dots in LED - Google Patents
Method for preparing fluorescent carbon quantum dots by using waste PET and application of fluorescent carbon quantum dots in LED Download PDFInfo
- Publication number
- CN115851269A CN115851269A CN202211526788.0A CN202211526788A CN115851269A CN 115851269 A CN115851269 A CN 115851269A CN 202211526788 A CN202211526788 A CN 202211526788A CN 115851269 A CN115851269 A CN 115851269A
- Authority
- CN
- China
- Prior art keywords
- carbon quantum
- quantum dots
- phenylenediamine
- dimethylformamide
- solvent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000002699 waste material Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 40
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 12
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical group [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 10
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 5
- 229940018564 m-phenylenediamine Drugs 0.000 claims description 5
- 235000005074 zinc chloride Nutrition 0.000 claims description 5
- 239000011592 zinc chloride Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 4
- 238000012805 post-processing Methods 0.000 claims description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- 239000011541 reaction mixture Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000002390 rotary evaporation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 28
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 7
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 238000004729 solvothermal method Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- -1 polyethylene terephthalate Polymers 0.000 abstract description 2
- 125000000524 functional group Chemical group 0.000 abstract 1
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 235000019441 ethanol Nutrition 0.000 description 9
- 239000000047 product Substances 0.000 description 6
- 239000003086 colorant Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000012085 test solution Substances 0.000 description 4
- 238000000295 emission spectrum Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 2
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001506 fluorescence spectroscopy Methods 0.000 description 1
- 238000002189 fluorescence spectrum Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Images
Landscapes
- Luminescent Compositions (AREA)
Abstract
The invention discloses a method for preparing multicolor carbon quantum dots by using waste PET, which takes polyethylene terephthalate (PET) as a carbon source and realizes PET degradation and direct synthesis of multicolor fluorescent carbon quantum dots by a solvothermal method. The fluorescent carbon quantum dots prepared by the method have rich surface functional groups and high fluorescence stability. By changing the solvent and the nitrogen source, the multicolor adjustment of fluorescence can be realized, and the yield of the carbon quantum dots is optimized by controlling the reaction conditions. The raw materials for preparing the carbon quantum dots are cheap and easy to obtain, the experimental operation is simple, the repeatability is high, and the large-scale production can be realized theoretically.
Description
Technical Field
The invention belongs to the field of environmental protection and waste resource utilization, and particularly relates to a technology for preparing multicolor fluorescent carbon quantum dots by utilizing waste PET (polyethylene terephthalate) plastics by adopting a solvothermal method.
Background
It is predicted that about 100 million tons of waste PET are transferred to landfills, oceans, and the like every year, and therefore, recycling of plastics including PET is a key to solve the problem.
The PET recovery by the chemical method is one of hot researches at present, the requirements on the quality of raw materials are not high, the physical properties of regenerated products are basically unchanged through chemical recovery, the application range of the products is wider, and the application value is higher than that of physical recovery. The conversion of waste plastics into carbon materials is one of the hot topics studied at present, and the conversion of waste plastics into high value-added carbon materials not only enables the waste plastics to be effectively recycled, but also saves the cost for the production of high value-added products by using cheap waste plastics as raw materials, and is one of the hot topics studied at present.
Zhou et al (Industrial & engineering chemistry research,51 (7): 2922-2930) synthesize different carbon nanomaterials at 600 to 1000 ℃ using solid wastes such as waste PET as carbon raw materials, and reveal that the type of carbon raw materials plays a decisive role in the formation of the carbon nanomaterial structure, and different carbon raw materials are pyrolyzed to produce different carbon-containing gas mixtures.
CN101979316A discloses a method for preparing an activated carbon material from waste PET, wherein the waste PET is converted into activated carbon with a higher specific surface area and a better pore structure through two reaction steps of carbonization and activation.
The traditional color conversion light-emitting diode uses organic fluorescent powder and heavy metal doped inorganic quantum dots, which brings certain threat to the environment, at present, adding yellow fluorescent powder which can be efficiently excited by blue light on a blue light chip is the simplest way for realizing the white light-emitting diode, but the problem that red light and green light parts in white light obtained by mixing are seriously lost exists, and carbon quantum dots attract people to pay attention because of environment friendliness, low toxicity and wider emission spectrum, but the problems of difficult preparation, low yield, low light efficiency and the like are faced at present. The control of the fluorescence color of the carbon quantum dots is more difficult.
Disclosure of Invention
In order to solve the environmental problem caused by PET wastes and make the waste PET be efficiently and reasonably utilized, the invention provides a technology for directly synthesizing multicolor fluorescent carbon quantum dots by using the waste PET through a solvothermal method, and the carbon quantum dots prepared by the method have adjustable fluorescence color and can be used as fluorescent materials to prepare LEDs with various colors. The method has high yield, and the prepared quantum dots have good fluorescence stability and adjustable emission wavelength and show great advantages in the field of LED display
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing multicolor fluorescent carbon quantum dots by using waste PET plastics comprises the following steps:
and (2) uniformly mixing the catalyst, the nitrogen source and the waste PET in a solvent, and reacting at 160-200 ℃ for 6-10 hours under a sealed condition to obtain the carbon quantum dot, wherein the reaction time is preferably 190 ℃ for 10 hours.
Preferably, the method further comprises a step of post-processing, the post-processing comprising:
the reaction mixture was filtered, dialyzed, and the solvent was removed, followed by drying.
Preferably, the method for removing the solvent comprises the following steps: and (4) performing rotary evaporation.
Preferably, the catalyst is zinc chloride.
Preferably, the nitrogen source is triethanolamine, formamide, p-phenylenediamine, triethylamine, ethylenediamine, o-phenylenediamine or ammonium citrate.
Preferably, the solvent is ethanol or N-N dimethylformamide.
Preferably, the waste PET is chips, and the side length of the chips is less than 1 cm.
Preferably, the mass ratio of the waste PET to the catalyst is 3 (1-6), the mass ratio of the waste PET to the nitrogen source is 1 (2-1), and the mass-to-volume ratio of the waste PET to the solvent is 0.3 (25-30) (g/ml).
Preferably, the combination of nitrogen source and solvent is selected from one of the group of combinations of classes a, B, C or D:
a: triethanolamine and ethanol, formamide and ethanol, p-phenylenediamine and ethanol, triethylamine and N-dimethylformamide, triethanolamine and N-dimethylformamide;
b: m-phenylenediamine and N-N dimethylformamide, m-phenylenediamine and ethanol;
c: formamide and N-N dimethylformamide, p-phenylenediamine and N-N dimethylformamide, o-phenylenediamine and N-N dimethylformamide, ammonium citrate and N-N dimethylformamide;
d: o-phenylenediamine and ethanol.
Wherein, the fluorescence wavelength of the carbon quantum dots prepared by the nitrogen source and the solvent of the A-class combination is about 450nm, and blue fluorescence is displayed. The fluorescence wavelength of the prepared carbon quantum dots is about 500nm by using the nitrogen source and the solvent combined by the B type, and green fluorescence is displayed. The fluorescence wavelength of the carbon quantum dots prepared by the nitrogen source and the solvent combined in the C class is about 550nm, and yellow fluorescence is displayed. The fluorescence wavelength of the carbon quantum dot prepared by using the nitrogen source and the solvent combined in the D class is 608nm, and the carbon quantum dot shows red fluorescence. By selecting different combinations of nitrogen sources and solvents, carbon quantum dots with different fluorescence colors are obtained.
The invention also provides an application of the multicolor fluorescent carbon quantum dot prepared by the method, which comprises the following steps: mixing the prepared carbon quantum dots with different fluorescent colors according to a required proportion and preparing a finished product. By mixing the carbon quantum dots with the three primary colors fluorescence according to the proportion, the white light and the LED fluorescent material with adjustable wavelength in the range of 446nm to 608nm can be obtained, and the LED lamplight display effect with adjustable emission spectrum can be achieved.
Compared with the prior art, the invention has the technical advantages that:
(1) The invention firstly uses the recycled waste PET as a raw material to prepare the four-color (blue, green, yellow and red) carbon quantum dots by adopting a solvothermal method.
(2) The carbon quantum dots provided by the invention have very good fluorescence time stability, and the fluorescence intensity is reduced by only 2.17% at most when the carbon quantum dots are stored for one month at the temperature of 4 ℃.
(3) According to the invention, the yield of the carbon quantum dots can be improved by regulating and controlling the addition amounts and the temperatures of the nitrogen source and the zinc chloride.
(4) The invention can prepare the white light-emitting diode by regulating and controlling the proportion of the three fluorescent color carbon quantum dots (blue, green and red).
Drawings
FIG. 1 is a transmission electron micrograph and a particle size distribution of carbon quantum dots prepared in example 1.
FIG. 2 is a graph showing fluorescence stability of carbon quantum dots prepared in example 1, in which a is a time stability graph and b is a pH stability graph.
FIG. 3 is a fluorescence emission spectrum of the four-color fluorescent carbon quantum dot obtained in example 3, wherein B-CDs are blue fluorescent carbon quantum dots [ triethanolamine and ethanol ], G-CDs are green fluorescent carbon quantum dots [ m-phenylenediamine and N-dimethylformamide ], Y-CDs are yellow fluorescent carbon quantum dots [ o-phenylenediamine and N-dimethylformamide ], and R-CDs are red fluorescent carbon quantum dots [ o-phenylenediamine and ethanol ].
FIG. 4 is a UV-VIS absorption spectrum of the four-color fluorescent carbon quantum dot prepared in example 3.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Preparation of blue carbon quantum dots:
and cutting the waste PET bottles into fragments with the side length less than 1 cm. After cleaning and drying, 0.3g of the mixture is weighed and placed in a lining of a 50ml high-pressure reaction kettle, and 0.2g of ZnCl is added 2 Adding 25ml of absolute ethyl alcohol and 357 mu L of triethylene alcoholAn amine. Sealing the reaction kettle by a stainless steel high-pressure reaction kettle, reacting for 10 hours at 180 ℃, and taking out the synthesized product after naturally cooling. The obtained synthetic product is firstly filtered through a 0.22 mu m filter membrane, the obtained filtrate is dialyzed for 2 days in a dialysis bag with the molecular weight cutoff of 1000Da by using 95% ethanol and then is taken out, and the final carbon quantum dot solution is obtained by filtering through the 0.22 mu m filter membrane again. And drying the solution by a rotary evaporator to obtain the carbon quantum dots. The morphology of the carbon quantum dots is shown in a perspective electron microscope image of fig. 1, the carbon quantum dots are uniformly dispersed, the particle size distribution of the carbon quantum dots is 0.6-2.4nm, and the average particle size is 1.61nm.
The cuvette containing 400. Mu.L of the carbon quantum dot test solution was placed in an environment at 4 ℃ and stored for 1 month, and the fluorescence intensity of emitted light was measured every 5 days. As shown in FIG. 2a, the fluorescence intensity of the carbon quantum dot test solution after 1 month of storage was reduced by only 2.17% as compared with the fluorescence intensity of the carbon quantum dot test solution before storage, indicating that the prepared carbon quantum dot had temporal stability.
The fluorescence stability of the carbon quantum dots in different acid-base solution environments, as shown in the test result shown in fig. 2b, compared with the carbon quantum dot test solution without the adjusted pH value, the fluorescence intensity of the carbon quantum dots in the environments with the pH values of 2 and 12 is reduced by 7.67% and 13.17%, which indicates that the carbon quantum dots obtained by the method can be applied to various acid-base environments.
Example 2
The only difference from example 1 is that: the addition amounts and temperatures of the nitrogen source and the zinc chloride are different.
Table 1 shows the carbon quantum dot yield and PET degradation rate at different zinc chloride addition levels and temperatures.
TABLE 1 Table of carbon quantum dot yield and PET degradation rate at different catalyst addition and temperature
Table 2 shows the yields of carbon quantum dots and the degradation rate of PET at different amounts of nitrogen source added.
TABLE 2 Table of yield and PET degradation rate of carbon quantum dots at different amounts of nitrogen source
| Triethanolamine addition amount/(μ L) | Carbon quantum dot yield | Percent degradation rate/%) |
| 0 | 0.00 | 89.58 |
| 100 | 7.89 | 88.30 |
| 200 | 10.31 | 88.08 |
| 300 | 12.35 | 88.53 |
| 400 | 16.84 | 89.57 |
| 500 | 16.37 | 87.96 |
| 600 | 15.68 | 89.58 |
Example 3
The only difference from example 1 is that: the colors (wavelength/nm) of the prepared carbon quantum dots are shown in table 3, with different nitrogen sources and solvents:
TABLE 3 color (wavelength/nm) of carbon quantum dots made with different nitrogen sources and solvents
The emission spectrum of the four-color fluorescent carbon quantum dot solution shown in fig. 3 was measured by a fluorescence spectrophotometer F-7000, and the detection results of the excitation light with wavelengths of 365nm, 450nm and 500nm are shown in fig. 3.
The ultraviolet-visible spectrum of the four-color fluorescent carbon quantum dot solution shown in fig. 3 is tested by an ultraviolet-visible spectrophotometer a360, and the detection result is shown in fig. 4.
Example 4
Three-color carbon quantum dots (blue, green, yellow) tested in fluorescence spectroscopy in example 3 were used to prepare white LEDs:
a total of 25mg of blue, green and red carbon quantum dots prepared in example 3 were mixed with 1.6g of ET-821A silica gel and 0.4g of ET-821B silica gel in an addition ratio of 1.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preparing multicolor fluorescent carbon quantum dots by using waste PET plastics is characterized by comprising the following steps:
uniformly mixing the catalyst, the nitrogen source and the waste PET in a solvent, sealing, and reacting at 160 to 200 ℃ for 6 to 10 hours to obtain the carbon quantum dots, wherein the reaction time is preferably 190 ℃ for 10 hours.
2. The method according to claim 1, characterized in that it further comprises a step of post-processing comprising:
the reaction mixture was filtered, dialyzed, and the solvent was removed, followed by drying.
3. The method of claim 2, wherein the solvent removal process is: and (4) performing rotary evaporation.
4. The method of claim 1, wherein the catalyst is zinc chloride.
5. The method of claim 1, wherein the nitrogen source is triethanolamine, formamide, p-phenylenediamine, triethylamine, ethylenediamine, o-phenylenediamine, or ammonium citrate.
6. The method of claim 1, wherein the solvent is ethanol or N-N dimethylformamide.
7. The method of claim 1, wherein the scrap PET is scrap having sides of 1cm or less.
8. The method according to claim 1, wherein the mass ratio of the waste PET to the catalyst is 3 (1-6), the mass ratio of the waste PET to the nitrogen source is 1 (2-1), and the mass-to-volume ratio of the waste PET to the solvent is 0.3 (25-30) g/ml.
9. The method of claim 1, wherein the combination of nitrogen source and solvent is selected from one of the group consisting of group a, B, C, or D:
a: triethanolamine and ethanol, formamide and ethanol, p-phenylenediamine and ethanol, triethylamine and N-dimethylformamide, triethanolamine and N-dimethylformamide;
b: m-phenylenediamine and N-N dimethylformamide, m-phenylenediamine and ethanol;
c: formamide and N-N dimethylformamide, p-phenylenediamine and N-N dimethylformamide, o-phenylenediamine and N-N dimethylformamide, ammonium citrate and N-N dimethylformamide;
d: o-phenylenediamine and ethanol.
10. The application of the multicolor fluorescent carbon quantum dot prepared by the method of any one of claims 1 to 9, which is characterized by comprising the following steps: mixing the prepared carbon quantum dots according to a required proportion and preparing a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211526788.0A CN115851269B (en) | 2022-12-01 | 2022-12-01 | Method for preparing fluorescent carbon quantum dots by using waste PET and application of fluorescent carbon quantum dots in LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211526788.0A CN115851269B (en) | 2022-12-01 | 2022-12-01 | Method for preparing fluorescent carbon quantum dots by using waste PET and application of fluorescent carbon quantum dots in LED |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115851269A true CN115851269A (en) | 2023-03-28 |
| CN115851269B CN115851269B (en) | 2024-03-29 |
Family
ID=85668705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211526788.0A Active CN115851269B (en) | 2022-12-01 | 2022-12-01 | Method for preparing fluorescent carbon quantum dots by using waste PET and application of fluorescent carbon quantum dots in LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115851269B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140224641A1 (en) * | 2011-03-18 | 2014-08-14 | Chris D. Geddes | Metal-enhanced photoluminescence from carbon nanodots |
| EP2913300A1 (en) * | 2014-02-28 | 2015-09-02 | Karlsruher Institut für Technologie | Carbon dots (c dots), method for their preparation and their use |
| CN106117531A (en) * | 2016-06-20 | 2016-11-16 | 电子科技大学 | The synthetic method of a kind of novel optical copolyesters and performance |
| KR20170046063A (en) * | 2015-10-20 | 2017-04-28 | 한국과학기술연구원 | N-doped nano carbon materials and method for manufacturing the same |
| WO2019142188A1 (en) * | 2018-01-18 | 2019-07-25 | Dotz Nano Ltd | Polymeric products comprising fluorescent carbon based materials and methods of preparation thereof |
| CN110337482A (en) * | 2018-01-02 | 2019-10-15 | 北京师范大学 | Triangle carbon quantum dot and its composition and purposes |
| CN113122247A (en) * | 2019-12-31 | 2021-07-16 | Tcl集团股份有限公司 | Composite material, preparation method thereof and quantum dot light-emitting diode |
| CN114591737A (en) * | 2022-03-16 | 2022-06-07 | 北京化工大学 | Multicolor fluorescent carbon dots, and preparation method and application thereof |
-
2022
- 2022-12-01 CN CN202211526788.0A patent/CN115851269B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140224641A1 (en) * | 2011-03-18 | 2014-08-14 | Chris D. Geddes | Metal-enhanced photoluminescence from carbon nanodots |
| EP2913300A1 (en) * | 2014-02-28 | 2015-09-02 | Karlsruher Institut für Technologie | Carbon dots (c dots), method for their preparation and their use |
| KR20170046063A (en) * | 2015-10-20 | 2017-04-28 | 한국과학기술연구원 | N-doped nano carbon materials and method for manufacturing the same |
| CN106117531A (en) * | 2016-06-20 | 2016-11-16 | 电子科技大学 | The synthetic method of a kind of novel optical copolyesters and performance |
| CN110337482A (en) * | 2018-01-02 | 2019-10-15 | 北京师范大学 | Triangle carbon quantum dot and its composition and purposes |
| WO2019142188A1 (en) * | 2018-01-18 | 2019-07-25 | Dotz Nano Ltd | Polymeric products comprising fluorescent carbon based materials and methods of preparation thereof |
| CN113122247A (en) * | 2019-12-31 | 2021-07-16 | Tcl集团股份有限公司 | Composite material, preparation method thereof and quantum dot light-emitting diode |
| CN114591737A (en) * | 2022-03-16 | 2022-06-07 | 北京化工大学 | Multicolor fluorescent carbon dots, and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| YUHANG WU等: "Preparation of Carbon Dots with Ultrahigh Fluorescence Quantum Yield Based on PET Waste", 《ACS OMEGA》, vol. 7, pages 38037 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115851269B (en) | 2024-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Song et al. | High production-yield solid-state carbon dots with tunable photoluminescence for white/multi-color light-emitting diodes | |
| CN109097038B (en) | Solid yellow fluorescent carbon quantum dot and preparation method thereof | |
| Zhao et al. | Multi-color fluorescent carbon dots with single wavelength excitation for white light-emitting diodes | |
| An et al. | Red, green, and blue light-emitting carbon dots prepared from o-phenylenediamine | |
| CN111117611B (en) | Concentration-dependent fluorescence adjustable solid red light carbon quantum dot and preparation method thereof | |
| Jin et al. | Orange-red, green, and blue fluorescence carbon dots for white light emitting diodes | |
| Chang et al. | Full color fluorescent carbon quantum dots synthesized from triammonium citrate for cell imaging and white LEDs | |
| CN113717719B (en) | Multi-optical-property carbon dots, and preparation method and application thereof | |
| CN109266100B (en) | Optical anti-counterfeiting ink with long-life red, green and blue luminescence characteristics and preparation method and application thereof | |
| CN114381261B (en) | Phosphorescent carbon dot-metal organic framework composite material and preparation method and application thereof | |
| Zheng et al. | One-step hydrothermal synthesis of carbon dots-polymer composites with solid-state photoluminescence | |
| CN110723722B (en) | Solid-state yellow-light carbon quantum dot compound based on multiple emission peaks and preparation method thereof | |
| CN109504375A (en) | A kind of preparation and regulation method of high chromaticness fluorescent carbon nano dot | |
| Liu et al. | Calcination temperature tuning of RTP and TADF with wide range of emission color from carbon dots confined in Al2O3 | |
| CN113666359B (en) | Green chemical method for large-scale solid-phase synthesis of fluorescent carbon dots in air | |
| CN111607394A (en) | Room temperature phosphorescent carbon dot compound and preparation method thereof | |
| DE112011103246T5 (en) | Nitride phosphor, its manufacturing process and the light source made with this phosphor for lighting | |
| Wang et al. | Visible light-excited full-color phosphorescent material realized by carbon dots dispersed in polyacrylamide and applied to anti-counterfeiting | |
| Xie et al. | Synthesis of carbon dots@ Mg (OH) 2 solid-state composites with blue, red emitting for horticultural application | |
| CN115851269B (en) | Method for preparing fluorescent carbon quantum dots by using waste PET and application of fluorescent carbon quantum dots in LED | |
| Ma et al. | Preparation of multicolor carbon quantum dots by hydrothermal method and their functionalization applications | |
| Sun et al. | 1, 10-Phenanthroline-5-amine derived N-doped carbon dots for long-lived visible-light-activated room temperature phosphorescence in the matrix and information encryption application | |
| Huang et al. | Lifetime-tunable green room temperature phosphorescence of carbon dots by the multi-step modification | |
| Cheng et al. | Facile synthesis of high-brightness green-emitting carbon dots with narrow bandwidth towards backlight display | |
| Ma et al. | Preparation of full-color carbon quantum dots with multiple emission centers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |