CN113088287A - Preparation method of water-soluble nano luminescent material and water-soluble nano luminescent material - Google Patents
Preparation method of water-soluble nano luminescent material and water-soluble nano luminescent material Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000018417 cysteine Nutrition 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 50
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 36
- 239000002244 precipitate Substances 0.000 claims description 36
- OVBPIULPVIDEAO-LBPRGKRZSA-N folic acid Chemical compound C=1N=C2NC(N)=NC(=O)C2=NC=1CNC1=CC=C(C(=O)N[C@@H](CCC(O)=O)C(O)=O)C=C1 OVBPIULPVIDEAO-LBPRGKRZSA-N 0.000 claims description 34
- 239000008367 deionised water Substances 0.000 claims description 32
- 229910021641 deionized water Inorganic materials 0.000 claims description 32
- 238000001035 drying Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 20
- OVBPIULPVIDEAO-UHFFFAOYSA-N N-Pteroyl-L-glutaminsaeure Natural products C=1N=C2NC(N)=NC(=O)C2=NC=1CNC1=CC=C(C(=O)NC(CCC(O)=O)C(O)=O)C=C1 OVBPIULPVIDEAO-UHFFFAOYSA-N 0.000 claims description 19
- 229960000304 folic acid Drugs 0.000 claims description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- 235000019152 folic acid Nutrition 0.000 claims description 15
- 239000011724 folic acid Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 12
- 239000012467 final product Substances 0.000 claims description 9
- 239000000047 product Substances 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 7
- XUJNEKJLAYXESH-REOHCLBHSA-N L-Cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 claims description 3
- 238000012986 modification Methods 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 6
- 239000002086 nanomaterial Substances 0.000 abstract description 5
- 239000002105 nanoparticle Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 6
- -1 rare earth ions Chemical class 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910052693 Europium Inorganic materials 0.000 description 4
- 239000000090 biomarker Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001945 cysteines Chemical class 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000006862 quantum yield reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
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Abstract
The application discloses a preparation method of a water-soluble nano luminescent material, the luminescent color of the prepared luminescent material can be adjusted between green light and blue-green light, Eu3+And S2‑The light-emitting integral intensity of the co-doped ZnO light-emitting material is superior to that of ZnO. After the cysteine is used for modification, the luminous intensity of the material is improved, and the water solubility of the material is improved. Solves the technical problems of weak luminous intensity and poor water solubility of the prior ZnO nano material.
Description
Technical Field
The application relates to the technical field of semiconductor nano materials, in particular to a preparation method of a water-soluble nano luminescent material and the water-soluble nano luminescent material.
Background
The nano luminescent material is a luminescent material with the particles of the matrix being 1-100 nm. Due to its excellent luminescence property and its wide application in the fields of chemical sensors, biomarkers and medical imaging, nano luminescent materials are becoming an important branch of new functional materials.
In the field of nano-luminescent materials, ZnO nanoparticles are particularly attractive because: (1) the exciton confinement energy of ZnO is as high as 60meV, the forbidden band width at room temperature is generally 3.37eV, so that the ZnO has stable emission power from ultraviolet to visible light theoretically, and has wide application prospects in the fields of photoelectric conversion, photocatalysis, sensors and the like; (2) the material has excellent chemical stability and strong radiation damage resistance; (3) the preparation method is simple, the raw materials are cheap and abundant, and have great application potential in the fields of photoelectric detectors, solar cells, in particular biosensors, biological fluorescent markers and the like. However, the commonly prepared ZnO nanoparticles have the defects of low quantum efficiency, weak luminous intensity, easy agglomeration, multiple surface defect states, poor water solubility and stability and the like, and cannot meet the application requirement of the biomarkers. In order to expand the application potential of the ZnO nanoparticles in the biomedical field, novel ZnO nanoparticles with high luminous intensity and excellent biocompatibility need to be developed so as to improve the bioavailability of the ZnO nanoparticles. A number of research works have shown that: the luminescent property of the ZnO nano-particles can be improved by doping rare earth ions Eu3+ or anions S2-, and the surface modification not only can further improve the luminescent intensity, but also can effectively improve the biocompatibility of the nano-particles. It can be predicted that: s, Eu nano particles with surface modified and co-doped anions and cations can show more excellent physicochemical properties due to the synergistic effect of Eu3+ and S2-, such as: high quantum yield, strong luminous intensity, adjustable luminous color, excellent biocompatibility and the like. Therefore, the surface modification of folic acid and cysteine is carried out by adopting the codoping of europium and sulfur ions, so that the luminescent property and the biocompatibility of the ZnO nano-particles can be further improved, the luminescent form and the luminescent mechanism of the ZnO nano-particles can be enriched by utilizing the characteristics of the europium ions, and the application of the ZnO nano-particles in the field of biomedicine is expanded. At present, however, the ZnO nanomaterial has weak luminous intensity and poor water solubility.
Disclosure of Invention
The application provides a preparation method of a water-soluble nano luminescent material and the water-soluble nano luminescent material, which are used for solving the technical problems of weak luminous intensity and poor water solubility of the existing ZnO nano material.
In view of the above, the first aspect of the present application provides a method for preparing a water-soluble nano luminescent material, comprising the following steps:
step 1, expressing Zn according to chemical composition1-xO0.95S0.05EuxWeighing Zn (CH) according to the molar ratio of medium doping elements3COO)2、C2H5NS, NaOH and Eu (CH)3COO)3Wherein x is a molar percentage coefficient of a corresponding doping element Eu relative to Zn, and the value range of x is more than or equal to 0.05 and less than or equal to 0.09;
step 2, weighing the Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)3Respectively dissolving the precipitate in 100mL of deionized water, then placing the mixture in a microwave reactor for reaction, wherein the reaction temperature is 50 ℃, the reaction time is 4 hours, and after the reaction is finished, dissolving the precipitate in the deionized water, performing centrifugal separation, and washing to obtain a first precipitate;
step 3, drying the first precipitate obtained in the step 2 at 60 ℃ for 24 hours, finely grinding the dried precipitate, and placing the ground precipitate in a vacuum drying oven at 200 ℃ for reaction for 3 hours to obtain a white powder sample A;
step 4, cleaning the sample in the step 3 by using acetone, then adding n-hexane and cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, carrying out centrifugal separation, and washing to obtain a second precipitate;
step 5, drying the second precipitate obtained in the step 4 at 60 ℃ for 5 hours, and then finely grinding to obtain a powder sample B;
and 6, adding deionized water and folic acid into the sample B, standing for 2 hours, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product C, namely the water-soluble nano luminescent material.
Optionally, the value of x in step 1 is 0.05.
Optionally, the value of x in step 1 is 0.07.
Optionally, the value of x in step 1 is 0.09.
Optionally, in step 4, washing the sample in step 3 with acetone, adding 5mL of n-hexane and 0.2g of cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, performing centrifugal separation, and washing to obtain a second precipitate;
and 6, adding 30mL of deionized water and 7mL of folic acid into the sample B, standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product C, namely the water-soluble nano luminescent material.
In a second aspect, the present application provides a water-soluble nano luminescent material obtained by the method for preparing a water-soluble nano luminescent material according to any one of the first aspect.
Optionally, the water-soluble nano luminescent material has the following chemical composition expression:
folic acid @ cysteine @ Zn1-xO0.95S0.05EuxAnd the value range of x is as follows: x is more than or equal to 0.05 and less than or equal to 0.09.
According to the technical scheme, the embodiment of the application has the following advantages:
the luminescent color of the luminescent material prepared by the preparation method of the water-soluble nano luminescent material provided by the invention can be adjusted between green light and blue-green light, and Eu3+And S2-The light-emitting integral intensity of the co-doped ZnO light-emitting material is superior to that of ZnO. After the cysteine is used for modification, the luminous intensity of the material is improved, and the water solubility of the material is improved. Solves the technical problems of weak luminous intensity and poor water solubility of the prior ZnO nano material.
Further, when x is 0.09, the relative integral emission intensity of the luminescent material prepared by the method for preparing the water-soluble nano luminescent material reaches the maximum.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a test chart showing a contact angle of 64.698 ° in example 5 of the present invention;
FIG. 2 is a test chart showing a contact angle of 46.262 ° in example 5 of the present invention;
FIG. 3 is a method for preparing a water-soluble nano-luminescent material provided in the present invention.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
(1) Weighing 0.5450g Zn (CH) according to the chemical composition expression of ZnO3COO)2And 0.1985g NaOH;
(2) weighing Zn (CH)3COO)2Dissolving NaOH and 100mL of deionized water respectively, then placing the mixture in a microwave reactor, dissolving the mixture in the deionized water, performing centrifugal separation, and washing to obtain a precipitate, wherein the reaction temperature is 50 ℃ and the reaction time is 4 hours;
(3) and (3) drying the precipitate in the step (2) at 60 ℃ for 24h, finely grinding, and reacting in a vacuum drying oven at 200 ℃ for 3h to obtain a white powder sample.
Example 2
(1) ZnO according to chemical composition expression0.95:S0.050.5382g of Zn (CH) are weighed out3COO)20.2g NaOH and 0.02g C2H5NS；
(2) Will be provided withWeighing Zn (CH)3COO)2NaOH and C2H5NS is respectively dissolved in 100mL of deionized water, then the NS is placed in a microwave reactor, the reaction temperature is 50 ℃, the reaction time is 4 hours, and then the NS is dissolved in the deionized water, centrifugally separated and washed to obtain a precipitate;
(3) and (3) drying the precipitate in the step (2) at 60 ℃ for 24h, finely grinding, and reacting in a vacuum drying oven at 200 ℃ for 3h to obtain a white powder sample.
Example 3
Please refer to fig. 3
(1) According to the chemical composition expression Zn1-xO0.95S0.05EuxPreparation of raw Material Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)32.4348g Zn (CH) were weighed out with x equal to 0.053COO)2、0.0439g C2H5NS, 0.4575g NaOH, and 0.1921gEu (CH)3COO)3；
(2) Weighing Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)3Respectively dissolving the raw materials in 100mL of deionized water, then placing the mixture into a microwave reactor, dissolving the mixture in the deionized water, centrifugally separating and washing the mixture to obtain precipitates, wherein the reaction temperature is 50 ℃ and the reaction time is 4 hours;
(3) and (3) drying the precipitate in the step (2) at 60 ℃ for 24h, finely grinding, and reacting in a vacuum drying oven at 200 ℃ for 3h to obtain a white powder sample.
Example 4
(1) According to the chemical composition expression Zn1-xO0.95S0.05EuxPreparation of raw Material Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)32.3367g Zn (CH) were weighed out with x equal to 0.073COO)2、0.0430g C2H5NS, 0.4486g NaOH and 0.2637g Eu (CH)3COO)3；
(2) Weighing Zn (CH)3COO)2、C2H5NS、NaOH and Eu (CH)3COO)3Respectively dissolving the raw materials in 100mL of deionized water, then placing the mixture into a microwave reactor, dissolving the mixture in the deionized water, centrifugally separating and washing the mixture to obtain precipitates, wherein the reaction temperature is 50 ℃ and the reaction time is 4 hours;
(3) and (3) drying the precipitate in the step (2) at 60 ℃ for 24h, finely grinding, and reacting in a vacuum drying oven at 200 ℃ for 3h to obtain a white powder sample.
Example 5
(1) According to the chemical composition expression Zn1-xO0.95S0.05EuxPreparation of raw Material Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)32.2424g Zn (CH) were weighed out as x ═ 0.093COO)2、0.0422g C2H5NS, 0.4399g NaOH and 0.3325g Eu (CH)3COO)3；
(2) Weighing Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)3Respectively dissolving the raw materials in 100mL of deionized water, then placing the mixture into a microwave reactor, dissolving the mixture in the deionized water, carrying out centrifugal separation, and washing to obtain precipitates, wherein the reaction temperature is 50 ℃ and the reaction time is 4 hours;
(3) and (3) drying the precipitate in the step (2) at 60 ℃ for 24h, finely grinding, and reacting in a vacuum drying oven at 200 ℃ for 3h to obtain a white powder sample.
Example 6
(1) Cleaning the sample in embodiment 5 with acetone, adding 5mL of n-hexane and 0.2g of cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, performing centrifugal separation, and washing to obtain a precipitate;
(2) drying the precipitate in the step (1) at 60 ℃ for 5 hours, and then finely grinding to obtain a final powder sample;
(3) and (3) adding 30mL of deionized water and 1mL of folic acid into the sample obtained in the step (2), standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product.
Example 7
(1) Cleaning the sample in embodiment 5 with acetone, adding 5mL of n-hexane and 0.2g of cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, performing centrifugal separation, and washing to obtain a precipitate;
(2) drying the precipitate in the step (1) at 60 ℃ for 5 hours, and then finely grinding to obtain a final powder sample;
(3) and (3) adding 30mL of deionized water and 3mL of folic acid into the sample obtained in the step (2), standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product.
Example 8
(1) Cleaning the sample in embodiment 5 with acetone, adding 5mL of n-hexane and 0.2g of cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, performing centrifugal separation, and washing to obtain a precipitate;
(2) drying the precipitate in the step (1) at 60 ℃ for 5 hours, and then finely grinding to obtain a final powder sample;
(3) and (3) adding 30mL of deionized water and 5mL of folic acid into the sample obtained in the step (2), standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product.
Example 9
(1) Cleaning the sample in embodiment 5 with acetone, adding 5mL of n-hexane and 0.2g of cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, performing centrifugal separation, and washing to obtain a precipitate;
(2) drying the precipitate in the step (1) at 60 ℃ for 5 hours, and then finely grinding to obtain a final powder sample;
(3) and (3) adding 30mL of deionized water and 7mL of folic acid into the sample obtained in the step (2), standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product.
Example 10
(1) Cleaning the sample in embodiment 5 with acetone, adding 5mL of n-hexane and 0.5g of cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, performing centrifugal separation, and washing to obtain a precipitate;
(2) drying the precipitate in the step (1) at 60 ℃ for 5 hours, and then finely grinding to obtain a final powder sample;
(3) and (3) adding 30mL of deionized water and 9mL of folic acid into the sample obtained in the step (2), standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product.
Table 1 test results one:
as can be seen from the above table: the color coordinates of the luminescent material prepared by the invention are green, the relative integral luminous intensity of the europium and sulfur ion codoped ZnO luminescent material is superior to that of ZnO and sulfur ion codoped ZnO luminescent material, and when x is 0.09 (example 5), the relative integral luminous intensity of a sample has a maximum value. Thus Zn1-xO0.95S0.05Eux(x is more than or equal to 0.05 and less than or equal to 0.09) the nano luminescent material is expected to be applied to the fields of luminescent devices and biomedicine.
Table 2 test results two:
as can be seen from the above table, the folate-modified cysteine-bound Zn prepared according to the present invention0.91O0.95S0.05Eu0.09Nano luminescent material (Folic acid @ cysteine @ Zn)1-xO0.95S0.05Eux) The relative integral luminous intensity of (2) is changed along with the change of the use amount of folic acid, when the use amount of folic acid is 7mL (example 9), the relative integral luminous intensity is maximum, and the luminous color is gradually shifted from green light to blue light, which shows that folic acid modification not only can enhance the luminescence, but also can adjust the luminous color. Therefore, the optimal luminous intensity and color can be obtained by controlling the use amount of the folic acid so as to meet the requirement of biomarker application on the high luminous intensity of the nano particles.
And (3) testing results:
please refer to fig. 1 and 2 for an exampleThe contact angle for example 5 was 64.698 deg., as shown in fig. 1, while the antenna for example 9 was 46.262 deg., as shown in fig. 2. This indicates Zn after folic acid modification0.91O0.95S0.05Eu0.09The hydrophilicity of the nano luminescent material is improved, and the requirement on the water solubility of the nano particles in the application of the biomarker field can be met.
The water-soluble nano luminescent material provided by the invention is obtained by the preparation method of the water-soluble nano luminescent material, and has the following chemical composition expression:
folic acid @ cysteine @ Zn1-xO0.95S0.05EuxAnd the value range of x is as follows: x is more than or equal to 0.05 and less than or equal to 0.09. The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (7)
1. A preparation method of a water-soluble nano luminescent material is characterized by comprising the following steps:
step 1, expressing Zn according to chemical composition1-xO0.95S0.05EuxWeighing Zn (CH) according to the molar ratio of medium doping elements3COO)2、C2H5NS, NaOH and Eu (CH)3COO)3Wherein x is a molar percentage coefficient of a corresponding doping element Eu relative to Zn, and the value range of x is more than or equal to 0.05 and less than or equal to 0.09;
step 2, weighing the Zn (CH)3COO)2、C2H5NS, NaOH and Eu (CH)3COO)3Respectively dissolving in 100mL of deionized water, placing in a microwave reactor for reaction at 50 ℃ for 4h, dissolving in deionized water after the reaction, centrifuging, and washingWashing to obtain a first precipitate;
step 3, drying the first precipitate obtained in the step 2 at 60 ℃ for 24 hours, finely grinding the dried precipitate, and placing the ground precipitate in a vacuum drying oven at 200 ℃ for reaction for 3 hours to obtain a white powder sample A;
step 4, cleaning the sample in the step 3 by using acetone, then adding n-hexane and cysteine, grinding until the n-hexane is completely volatilized, dissolving the product in deionized water, carrying out centrifugal separation, and washing to obtain a second precipitate;
step 5, drying the second precipitate obtained in the step 4 at 60 ℃ for 5 hours, and then finely grinding to obtain a powder sample B;
and 6, adding deionized water and folic acid into the sample B, standing for 2 hours, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product C, namely the water-soluble nano luminescent material.
2. The method for preparing a water-soluble nano luminescent material according to claim 1, wherein x in step 1 is 0.05.
3. The method for preparing a water-soluble nano luminescent material according to claim 1, wherein x in step 1 is 0.07.
4. The method for preparing a water-soluble nano luminescent material according to claim 1, wherein x in step 1 is 0.09.
5. The method for preparing a water-soluble nano luminescent material according to claim 4, wherein in the step 4, the sample in the step 3 is washed by acetone, then 5mL of n-hexane and 0.2g of cysteine are added, the mixture is ground until the n-hexane is completely volatilized, and then the product is dissolved in deionized water, centrifugally separated and washed to obtain a second precipitate;
and 6, adding 30mL of deionized water and 7mL of folic acid into the sample B, standing for 2h, performing centrifugal separation, drying at 60 ℃, and finely grinding to obtain a final product C, namely the water-soluble nano luminescent material.
6. A water-soluble nano luminescent material, which is obtained by the preparation method of the water-soluble nano luminescent material according to any one of claims 1 to 5.
7. The water-soluble nano-phosphor of claim 6, wherein the water-soluble nano-phosphor has the following chemical composition expression:
folic acid @ cysteine @ Zn1-xO0.95S0.05EuxAnd the value range of x is as follows: x is more than or equal to 0.05 and less than or equal to 0.09.
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| CN101024767A (en) * | 2006-02-21 | 2007-08-29 | 上海师范大学 | Near-ultraviolet or ultraviolet excited semiconductor luminous material and its preparing method |
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