CN113025331A - Purification method of quantum dots - Google Patents
Purification method of quantum dots Download PDFInfo
- Publication number
- CN113025331A CN113025331A CN201911345622.7A CN201911345622A CN113025331A CN 113025331 A CN113025331 A CN 113025331A CN 201911345622 A CN201911345622 A CN 201911345622A CN 113025331 A CN113025331 A CN 113025331A
- Authority
- CN
- China
- Prior art keywords
- quantum dot
- quantum dots
- quantum
- solution
- dot solution
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Optics & Photonics (AREA)
- Polyamides (AREA)
Abstract
The invention belongs to the technical field of quantum dot processes, and particularly relates to a purification method of quantum dots. The purification method of the quantum dot comprises the following steps: providing an initial quantum dot solution; adding a polyamide-amine dendritic polymer material into the initial quantum dot solution for a complexing reaction to obtain a mixed solution; and separating the polyamide-amine dendritic polymer material after the complexation reaction in the mixed solution to obtain a purified quantum dot solution. The polyamide-amine dendritic polymer is highly branched and contains rich primary amine active groups, so that metal ions in an initial quantum dot solution can be more effectively adsorbed, the purification effect on quantum dots is good, the purification method is simple, the cost is low, and the method has wide application in the field of quantum dot purification processes.
Description
Technical Field
The invention belongs to the technical field of quantum dot processes, and particularly relates to a purification method of quantum dots.
Background
Quantum Dots (QDs), namely semiconductor nanocrystals with the particle size smaller than the glass radius of the material, are generally 1-10 nm, and because electrons and holes are Quantum confined, a continuous energy band structure is changed into a discrete energy level structure with molecular characteristics, and can emit fluorescence after being excited. Thus quantum dots of different sizes can be excited simultaneously with a single wavelength light source. The emission wavelength and Stokes shift of the quantum dots can be adjusted by changing the particle size of the quantum dots, the fluorescence spectrum is narrow and symmetrical, and the quantum dots with various fluorescence spectrum characteristics can be prepared. The quantum dots have unique characteristics of photoelectromagnetism and the like due to quantum size effect, quantum confinement effect, surface effect and the like, and have wide application prospects in the fields of light-emitting diodes, solar cells, biological characterization, photoelectric sensors and the like.
The traditional purification method of the quantum dots uses organic reagents such as methanol, acetone, ethyl acetate and the like for cleaning, but the cleaning method of the organic reagents cannot completely clean metal ions in the quantum dots, and needs to use various different reagents for cleaning, so that the operation is complex, and the effect is not ideal.
Therefore, the prior art is in need of improvement.
Disclosure of Invention
The invention aims to provide a purification method of quantum dots, and aims to solve the technical problem that the existing purification method of quantum dots is not ideal in effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a purification method of quantum dots, which comprises the following steps:
providing an initial quantum dot solution;
adding a polyamide-amine dendritic polymer material into the initial quantum dot solution for a complexing reaction to obtain a mixed solution;
and separating the polyamide-amine dendritic polymer material after the complexation reaction in the mixed solution to obtain a purified quantum dot solution.
In the purification method of the quantum dots, the polyamide-amine dendrimer (PAMAM) is added into an initial quantum dot solution for a complex reaction, the end group of the polyamide-amine dendrimer contains a primary amino group, and the primary amino group can perform the complex reaction with metal ions in the initial quantum dot solution, so that the metal ions are adsorbed on the polyamide-amine dendrimer, and the purified quantum dot solution can be obtained after the polyamide-amine dendrimer adsorbed with the metal ions is separated; because the polyamide-amine dendritic polymer is highly branched and contains rich primary amine active groups, the metal ions in the initial quantum dot solution can be more effectively complexed, adsorbed and separated, the purification effect on the quantum dots is good, and the purification method is simple, low in cost and widely applied to the field of quantum dot purification processes.
Drawings
Fig. 1 is a schematic flow chart of a purification method of quantum dots according to an embodiment of the present invention;
FIG. 2 is a diagram showing a process for producing a polyamidoamine dendrimer according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the principle of the complexation reaction between the polyamidoamine dendrimer material of the embodiment of the present invention and the metal ions in the quantum dot solution.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a purification method of quantum dots, which comprises the following steps as shown in figure 1:
s01: providing an initial quantum dot solution;
s02: adding a polyamide-amine dendritic polymer material into the initial quantum dot solution for a complexing reaction to obtain a mixed solution;
s03: and separating the polyamide-amine dendritic polymer material after the complexation reaction in the mixed solution to obtain a purified quantum dot solution.
According to the quantum dot purification method provided by the embodiment of the invention, a polyamide-amine dendrimer (PAMAM) is added into an initial quantum dot solution for a complex reaction, the end group of the PAMAM contains a primary amino group, and the primary amino group can perform a complex reaction with metal ions in the initial quantum dot solution, so that the metal ions are adsorbed on the PAMAM, and the PAMAM adsorbed with the metal ions is separated to obtain a purified quantum dot solution; because the polyamide-amine dendritic polymer is highly branched and contains rich primary amine active groups, the metal ions in the initial quantum dot solution can be more effectively complexed, adsorbed and separated, the purification effect on the quantum dots is good, and the purification method is simple, low in cost and widely applied to the field of quantum dot purification processes.
In the embodiment of the present invention, the polyamidoamine dendrimer material used is selected from the polyamidoamine dendrimers of 1.0-10.0 generation (G1.0 PAMAM, G2.0 PAMAM.. G10.0PAMAM). PAMAM is a highly branched polymer, different generations represent different branching degrees, and the terminal group of PAMAM contains primary amine groups, and the interior of PAMAM contains tertiary amine groups and amide groups, wherein the higher the generations, the more PAMAM branches, the more terminal primary amine groups are contained, and the higher the activity of the primary amine groups is, but the synthesis above G10.0PAMAM is difficult, so G1.0-G10.0 PAMAM is used in the embodiment; further, preferably, G8.0-G10.0 PAMAM is used for purifying the quantum dots, high-algebraic PAMAM is used for purifying the quantum dots, the amount of the added PAMAM is reduced, the mass ratio of the quantum dots to the PAMAM is reduced, the time required by reaction is also reduced, and the cost required by purification can be saved. In the embodiment of the invention, the PAMAM can be prepared by taking methyl acrylate and ethylenediamine as reaction raw materials and continuously repeating the reaction to obtain G1.0-G10.0 PAMAM, as shown in figure 2.
Fig. 3 is a schematic diagram of the principle of the complexation reaction between the polyamide-amine type dendritic polymer material and the metal ions in the quantum dot solution: the polyamide-amine type dendrimer has primary amino group as terminal group, and can be mixed with metal ion (such as Cd)2+、Zn2+) The metal ions are adsorbed on the PAMAM through a complexation reaction, and the purified quantum dots can be obtained by separating the polyamide-amine dendritic polymer adsorbed with the metal ions.
In step S01, the initial quantum dot solution may be a quantum dot solution system directly obtained after the synthesis of the quantum dot, or a quantum dot solution system obtained by re-dissolving the synthesized quantum dot solid product. The quantum dots can be oil-soluble quantum dots, the oil-soluble quantum dots can be oil-soluble quantum dots directly synthesized by an oil phase, and the oil-soluble quantum dots obtained by any other method, and metal ions introduced in the process of synthesizing the oil-soluble quantum dots can be separated by using the purification method disclosed by the application, so that the purified quantum dots are obtained. In one embodiment, the concentration of quantum dots in the initial quantum dot solution is 20-40 mg/mL.
The quantum dots in the initial quantum dot solution can be quantum dots containing metal elements, so that the purification method can remove the metal elements which are not synthesized into the quantum dots, and can also remove exogenous and polluted metal elements in the quantum dot solution. The metal element adsorbed by the polyamide-amine dendrimer can be heavy metal, specifically gold ion, silver ion, copper ion, iron ion, mercury ion, lead ion, cadmium ion and the like. Specifically, the quantum dots in the initial quantum dot solution are selected from at least one of group II-VI quantum dots, group III-V quantum dots, group II-V quantum dots, group III-VI quantum dots, group IV-VI quantum dots, group I-III-VI quantum dots, group II-IV-VI quantum dots, and perovskite quantum dots. For example, quantum dots include, but are not limited to, nanocrystals of II-VI semiconductors such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, PbS, PbSe, PbTe, and other binary, ternary, quaternary II-VI compounds; nanocrystals of group III-V semiconductors such as GaP, GaAs, InP, InAs and other binary, ternary, quaternary III-V compounds; the quantum dots are also not limited to group II-V compounds, group III-VI compounds, group IV-VI compounds, group I-III-VI compounds, group II-IV-VI compounds, and the like. It may also be a doped or undoped inorganic perovskite-type semiconductor, and/or an organic-inorganic hybrid perovskite-type semiconductor; specifically, the structural general formula of the inorganic perovskite type semiconductor is AMX3Wherein A is Cs+Ion, M is a divalent metal cation, including but not limited to Pb2+、Sn2+、Cu2+、Ni2+、Cd2+、Cr2+、Mn2+、Co2+、Fe2+、Ge2+、Yb2+、Eu2+X is a halide anion, including but not limited to Cl-、Br-、I-(ii) a The structural general formula of the organic-inorganic hybrid perovskite type semiconductor is BMX3Wherein B is an organic amine cation including but not limited to CH3(CH2)n-2NH3 +(n.gtoreq.2) or NH3(CH2)nNH3 2+(n.gtoreq.2). When n is 2, the inorganic metal halide octahedron MX6 4-The metal cations M are positioned in the center of a halogen octahedron through connection in a roof sharing mode, and the organic amine cations B are filled in gaps among the octahedrons to form an infinitely extending three-dimensional structure; inorganic metal halide octahedra MX linked in a coterminous manner when n > 26 4-The organic amine cation bilayer (protonated monoamine) or the organic amine cation monolayer (protonated diamine) is inserted between the layers, and the organic layer and the inorganic layer are overlapped with each other to form a stable two-dimensional layered structure; m is a divalent metal cation including, but not limited to, Pb2+、Sn2+、Cu2+、Ni2+、Cd2+、Cr2+、Mn2+、Co2+、Fe2+、Ge2+、Yb2+、Eu2 +(ii) a X is a halide anion, including but not limited to Cl-、Br-、I。
The quantum dots of the present embodiment may be single-core quantum dots or core-shell quantum dots; the architecture of the quantum dots includes, but is not limited to: the structure comprises a quantum dot homogeneous binary component mononuclear structure, a quantum dot homogeneous multi-component alloy component mononuclear structure, a quantum dot multi-component gradual change mononuclear structure, a quantum dot binary component discrete core-shell structure, a quantum dot multi-component alloy component discrete core-shell structure or a quantum dot multi-component alloy component gradual change core-shell structure; specifically, the core and shell compounds of the quantum dots are ZnSe, ZnS, CdZnS, ZnSeS, CdSe @ ZnS, CdS @ ZnSe, CdTe @ ZnS, CdZnS @ ZnSe, CdSeS @ ZnS, CdZnSeTe and the like.
In step S02, in the step of adding the polyamidoamine dendrimer material into the initial quantum dot solution for a complex reaction, a mass ratio of the polyamidoamine dendrimer material to the quantum dots in the initial quantum dot solution is (5-50): 1. the lower the generation number of PAMAM, the more the amount is used, the higher the generation number of PAMAM, the less the amount is used, and the metal ions in the quantum dot solution can be fully and completely adsorbed within the mass ratio range, and can be well separated from the quantum dots in the subsequent steps.
In the above step S03 of the embodiment of the present invention, the time of the complexation reaction is 6-24 h. Within the time range, the polyamide-amine dendritic polymer material can fully complex and adsorb the total heavy metals in the quantum dot solution. And the method for separating the polyamide-amine dendritic polymer material after the complexation reaction in the mixed solution is differential centrifugal separation. According to the different masses of the macromolecular PAMAM and the quantum dots, the PAMAM adsorbed with metal ions can be better separated by adopting a differential centrifugation method, thereby achieving the purpose of purifying the quantum dots. In one embodiment, the step of differential centrifugation comprises: and centrifuging the mixed solution at a first centrifugal speed, then accelerating to a second centrifugal speed for centrifuging, and obtaining supernate, namely the purified quantum dot solution.
The first centrifugation speed separation is used for precipitating the polyamidoamine dendrimer adsorbed with the metal ions, and the second centrifugation speed separation is used for precipitating the excessive polyamidoamine dendrimer. The polyamidoamine dendrimer adsorbed the metal ions has a greater mass, and thus, the first centrifugal speed may be lower than the second centrifugal speed. Specifically, the first centrifugal speed is 4000-; the time for centrifugation under the first centrifugation speed condition is 0.5-2 min. The second centrifugal speed is 7000-9000 r/min; and the time for centrifuging under the second centrifugation speed condition is 4-8 min.
In one embodiment, a method for purifying quantum dots comprises the following steps:
the method comprises the following steps: preparation of polyamidoamine dendrimers (PAMAM) of different generations: adding ethylenediamine into a 250mL three-neck flask, and maintaining the temperature by adopting an ice-water bathIntroducing N at 0 DEG C2The air in the three-neck flask is exhausted. Slowly adding methyl acrylate under magnetic stirring, uniformly mixing, heating, and reacting at constant temperature of 25 ℃ for 24 hours. Vacuum distilling at 25 deg.C and 133Pa to remove solvent methanol and excessive methyl acrylate to obtain yellowish viscous liquid, which is 0.5 th generation polyamidoamine dendrimer (G0.5 PAMAM). The above reaction steps are repeated, and as shown in FIG. 2, the 1.0 th to 10.0 th generation polyamidoamine dendrimers (G1.0-G10.0 PAMAM) can be prepared in sequence.
Step two: adding polyamide-amine type dendritic polymer into a beaker filled with quantum dot solution, and uniformly stirring and reacting for 24h by magnetic force to enable metal ions (such as Cd) in the quantum dot solution2+、Zn2+) Fully reacting with polyamide-amine type dendritic polymer.
Step three: separating the quantum dots from the polyamidoamine dendrimer by a differential centrifugation method: firstly, regulating the rotating speed to 5000r/min, and centrifuging for 1min to obtain precipitate, namely the polyamide-amine dendritic polymer adsorbed with metal ions; and then adjusting the rotating speed to 8000r/min, centrifuging for 5min, and separating excessive polyamide-amine dendrimer to obtain the supernatant which is the purified quantum dot solution.
The invention is described in further detail with reference to a part of the test results, which are described in detail below with reference to specific examples.
Example 1
A purification method of quantum dots comprises the following steps:
s1: g1.0 preparation of PAMAM:
adding ethylenediamine into a 250mL three-neck flask, keeping the temperature at 0 ℃ by adopting an ice-water bath, and introducing N2The air in the three-neck flask is exhausted. Slowly adding excessive methyl acrylate under magnetic stirring, uniformly mixing, heating, and reacting at the constant temperature of 25 ℃ for 24 hours. Vacuum distilling at 25 deg.C and 133Pa to remove solvent methanol and excessive methyl acrylate to obtain yellowish viscous liquid, which is 0.5 th generation polyamidoamine dendrimer (G0.5 PAMAM). Adding into a 250mL three-neck flaskG0.5 PAMAM, N is introduced2And (3) exhausting air in the three-neck flask, slowly adding ethylenediamine under magnetic stirring, uniformly mixing, keeping the constant temperature of 25 ℃ and reacting for 24 hours to obtain the G1.0 PAMAM.
S2: adding 100g G1.0.0 PAMAM into a beaker filled with 100mL of 20mg/mL quantum dot solution (content CdS @ ZnSe core-shell quantum dots), wherein the mass ratio of the quantum dots to the PAMAM is 1: 50, uniformly stirring by magnetic force, and reacting at constant temperature of 25 ℃ for 24 hours to obtain Cd in the quantum dot solution2+、Zn2+Fully reacting with polyamide-amine type dendritic polymer.
S3: separating the quantum dots from the polyamidoamine dendrimer by adopting a differential centrifugation method: firstly regulating the rotating speed to 4000r/min, centrifuging for 0.5min, filtering, and precipitating to obtain the adsorbed Cd2+、Zn2+The polyamidoamine dendrimer of (1); regulating rotation speed to 7000r/min, centrifuging for 4min, filtering, precipitating to obtain excessive polyamidoamine dendrimer, and collecting supernatant2+、Zn2+The CdS @ ZnSe core-shell quantum dot solution.
Example 2
A purification method of quantum dots comprises the following steps:
s1: g5.0 preparation of PAMAM:
adding ethylenediamine into a 250mL three-neck flask, keeping the temperature at 0 ℃ by adopting an ice-water bath, and introducing N2The air in the three-neck flask is exhausted. Slowly adding excessive methyl acrylate under magnetic stirring, uniformly mixing, heating, and reacting at the constant temperature of 25 ℃ for 24 hours. Vacuum distilling at 25 deg.C and 133Pa to remove solvent methanol and excessive methyl acrylate to obtain yellowish viscous liquid, which is 0.5 th generation polyamidoamine dendrimer (G0.5 PAMAM). A250 mL three-necked flask was charged with G0.5 PAMAM and N was passed through2And (3) exhausting air in the three-neck flask, slowly adding ethylenediamine under magnetic stirring, uniformly mixing, keeping the constant temperature of 25 ℃ and reacting for 24 hours to obtain the G1.0 PAMAM. Repeating the above operation for 4 times to obtain G5.0 PAMAM.
S2: 30g G5.0.0 PAMAM was added to a solution containing 100mL of quantum dots (containing CdS) at a concentration of 30mg/mLe @ ZnS core-shell quantum dots), the mass ratio of the quantum dots to the PAMAM is 1: 10, uniformly stirring by magnetic force, and reacting for 12 hours at constant temperature of 25 ℃ to obtain Cd in the quantum dot solution2+、Zn2+Fully reacting with polyamide-amine type dendritic polymer.
S3: separating the quantum dots from the polyamidoamine dendrimer by adopting a differential centrifugation method: firstly regulating the rotating speed to 5000r/min, centrifuging for 1min, filtering, and precipitating to obtain the adsorbed Cd2+、Zn2+The polyamidoamine dendrimer of (1); regulating rotation speed to 8000r/min, centrifuging for 6min, filtering, precipitating to obtain excessive polyamide-amine type dendritic polymer, and collecting supernatant2+、Zn2+The CdSe @ ZnS core-shell quantum dot solution.
Example 3
A purification method of quantum dots comprises the following steps:
s1: g10.0 preparation of PAMAM:
adding ethylenediamine into a 250mL three-neck flask, keeping the temperature at 0 ℃ by adopting an ice-water bath, and introducing N2The air in the three-neck flask is exhausted. Slowly adding excessive methyl acrylate under magnetic stirring, uniformly mixing, heating, and reacting at the constant temperature of 25 ℃ for 24 hours. Distilling under reduced pressure at 25 deg.C and 133Pa to remove solvent methanol and excessive methyl acrylate to obtain yellowish viscous liquid, which is 0.5 generation polyamidoamine dendrimer (G0.5 PAMAM); a250 mL three-necked flask was charged with G0.5 PAMAM and N was passed through2And (3) exhausting air in the three-neck flask, slowly adding ethylenediamine under magnetic stirring, uniformly mixing, keeping the constant temperature of 25 ℃ and reacting for 24 hours to obtain the G1.0 PAMAM. Repeating the above operation for 9 times to obtain G10.0 PAMAM.
S2: adding 20g G10.0.0 PAMAM into a beaker filled with 100mL of quantum dot solution (containing CdTe @ ZnS core-shell quantum dots) with the concentration of 40mg/mL, wherein the mass ratio of the quantum dots to the PAMAM is 1: 5, uniformly stirring by magnetic force, and reacting for 6 hours at constant temperature of 25 ℃ to obtain Cd in the quantum dot solution2+、Zn2+Fully reacting with polyamide-amine type dendritic polymer.
S3: quantum separation by differential centrifugationAnd polyamide-amine type dendrimers: firstly regulating the rotating speed to 6000r/min, centrifuging for 2min, filtering, and precipitating to obtain the adsorbed Cd2+、Zn2+The polyamidoamine dendrimer of (1); regulating rotation speed to 9000r/min, centrifuging for 8min, filtering, precipitating to obtain excessive polyamidoamine dendrimer, and collecting supernatant2+、Zn2+The CdTe @ ZnS core-shell quantum dot solution.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A purification method of quantum dots is characterized by comprising the following steps:
providing an initial quantum dot solution;
adding a polyamide-amine dendritic polymer material into the initial quantum dot solution for a complexing reaction to obtain a mixed solution;
and separating the polyamide-amine dendritic polymer material after the complexation reaction in the mixed solution to obtain a purified quantum dot solution.
2. The method for purifying a quantum dot according to claim 1, wherein the polyamidoamine dendrimer material is selected from the group consisting of polyamidoamine dendrimers of 1.0 to 10.0 generations.
3. The method for purifying a quantum dot according to claim 1, wherein in the step of adding a polyamidoamine dendrimer material to the initial quantum dot solution for a complexation reaction, the mass ratio of the polyamidoamine dendrimer material to the quantum dot in the initial quantum dot solution is (5-50): 1.
4. the method for purifying a quantum dot according to claim 1, wherein the method for separating the polyamidoamine dendrimer after the complexation reaction in the mixed solution is differential centrifugation.
5. The method of purifying quantum dots according to claim 4, wherein the step of differential centrifugation comprises: and centrifuging the mixed solution at a first centrifugal speed, then accelerating to a second centrifugal speed for centrifuging, and obtaining supernate, namely the purified quantum dot solution.
6. The method for purifying quantum dots according to claim 5, wherein the first centrifugation speed is 4000-; and/or the presence of a gas in the gas,
the time for centrifugation under the first centrifugation speed condition is 0.5-2 min.
7. The method for purifying quantum dots according to claim 5, wherein the second centrifugation speed is 7000-9000 r/min; and/or the presence of a gas in the gas,
and the time for centrifuging under the second centrifugation speed condition is 4-8 min.
8. The method for purifying quantum dots according to claim 1, wherein the time of the complexation reaction is 6-24 h.
9. The method for purifying a quantum dot according to any one of claims 1 to 8, wherein the concentration of the quantum dot in the initial quantum dot solution is 20 to 40 mg/mL.
10. The method for purifying a quantum dot according to any one of claims 1 to 8, wherein the quantum dot in the initial quantum dot solution is a quantum dot containing a metal element; and/or the presence of a gas in the gas,
the quantum dots in the initial quantum dot solution are selected from at least one of group II-VI quantum dots, group III-V quantum dots, group II-V quantum dots, group III-VI quantum dots, group IV-VI quantum dots, group I-III-VI quantum dots, group II-IV-VI quantum dots and perovskite quantum dots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911345622.7A CN113025331A (en) | 2019-12-24 | 2019-12-24 | Purification method of quantum dots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911345622.7A CN113025331A (en) | 2019-12-24 | 2019-12-24 | Purification method of quantum dots |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113025331A true CN113025331A (en) | 2021-06-25 |
Family
ID=76451573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911345622.7A Pending CN113025331A (en) | 2019-12-24 | 2019-12-24 | Purification method of quantum dots |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113025331A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101006017A (en) * | 2004-07-16 | 2007-07-25 | 加利福尼亚技术学院 | Water treatment by dendrimer enhanced filtration |
| CN101308061A (en) * | 2008-07-09 | 2008-11-19 | 北京理工大学 | Rapid latent fingerprint presentation reagent preparation method |
| CN101695476A (en) * | 2009-10-26 | 2010-04-21 | 吉林大学 | Method for preparing medical nanoparticles |
| CN105778895A (en) * | 2016-04-08 | 2016-07-20 | 兰州文理学院 | Preparation and application of CdS-PAMAM nanocomposite in detecting Cu2+ |
| CN107359264A (en) * | 2017-08-03 | 2017-11-17 | 青岛海信电器股份有限公司 | A kind of QLED, preparation method and display device |
| CN107474248A (en) * | 2017-08-25 | 2017-12-15 | 青岛大学 | A kind of big particle diameter dendritic macromole of fluorescence and preparation method thereof |
-
2019
- 2019-12-24 CN CN201911345622.7A patent/CN113025331A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101006017A (en) * | 2004-07-16 | 2007-07-25 | 加利福尼亚技术学院 | Water treatment by dendrimer enhanced filtration |
| CN101308061A (en) * | 2008-07-09 | 2008-11-19 | 北京理工大学 | Rapid latent fingerprint presentation reagent preparation method |
| CN101695476A (en) * | 2009-10-26 | 2010-04-21 | 吉林大学 | Method for preparing medical nanoparticles |
| CN105778895A (en) * | 2016-04-08 | 2016-07-20 | 兰州文理学院 | Preparation and application of CdS-PAMAM nanocomposite in detecting Cu2+ |
| CN107359264A (en) * | 2017-08-03 | 2017-11-17 | 青岛海信电器股份有限公司 | A kind of QLED, preparation method and display device |
| CN107474248A (en) * | 2017-08-25 | 2017-12-15 | 青岛大学 | A kind of big particle diameter dendritic macromole of fluorescence and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| PENG, Y;等: "A poly(amidoamine) nanoparticle cross-linked two-dimensional metal-organic framework nanosheet membrane for water purification", 《CHEMICAL COMMUNICATIONS》 * |
| RETHER, A AND SCHUSTER, M: "Selective separation and recovery of heavy metal ions using water-soluble N-benzoylthiourea modified PAMAM polymers", 《REACTIVE & FUNCTIONAL POLYMERS》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10468559B2 (en) | Quantum dot nanoparticles having enhanced stability and luminescence efficiency | |
| EP2310321B1 (en) | Method for producing surface-functionalized nanoparticles | |
| US8030784B2 (en) | Semiconductor nanoparticle surface modification | |
| KR101610850B1 (en) | Method for producing aqueous compatible nanoparticles | |
| JP5356318B2 (en) | Stabilized semiconductor nanocrystals | |
| CN102272217B (en) | Surface-functionalized nano-particle | |
| KR101941299B1 (en) | Highly luminescent semiconductor nanocrystals | |
| CN106715643B (en) | For dispersing quantum dot in organosilicon main body to obtain the siloxanes ligand of the color converter for LED illumination | |
| US11352556B2 (en) | Process for the synthesis of air stable metal sulphide quantum dots | |
| CN109970887B (en) | Polymer ligand, quantum dot and preparation method thereof | |
| CN109651597B (en) | Particle, organic ligand, composite material, preparation method and application thereof | |
| US8399939B2 (en) | Color selective photodetector and methods of making | |
| KR20150107469A (en) | A polymer of nano-particles | |
| Li et al. | Synthesis of Cd-free water-soluble ZnSe1− xTex nanocrystals with high luminescence in the blue region | |
| KR101411196B1 (en) | Nanocrystal-polydimethylsiloxane composite and preparation method thereof | |
| CN113025331A (en) | Purification method of quantum dots | |
| Santos et al. | Semiconductor quantum dots in chemical analysis | |
| EP1795573B1 (en) | Semiconductor nanoparticle surface modification method | |
| CN111019631A (en) | Preparation method of core-shell structure nanocrystal | |
| CN113117646B (en) | Composite material and preparation method thereof and purification method of quantum dots | |
| CN113755156B (en) | Preparation method and application of PbSe/metal sulfide core-shell quantum dot | |
| CN115161026A (en) | Core-shell quantum dot luminescent material and preparation method thereof | |
| CN111778030A (en) | Method for passivating quantum dots by adopting Grignard reagent | |
| CN112744791A (en) | Metal oxide nanoparticles, method for producing same and use thereof | |
| CN112745828A (en) | Near-infrared quantum dot and preparation method and application thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210625 |
|
| RJ01 | Rejection of invention patent application after publication |