CN113307303A - High-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial and preparation method and application thereof - Google Patents
High-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial and preparation method and application thereof Download PDFInfo
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- 239000002086 nanomaterial Substances 0.000 title claims abstract description 33
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 9
- 239000002243 precursor Substances 0.000 claims abstract description 8
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 14
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical group [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 229910000024 caesium carbonate Inorganic materials 0.000 claims description 5
- 229910052794 bromium Inorganic materials 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 229910052740 iodine Inorganic materials 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 239000012216 imaging agent Substances 0.000 claims 1
- 229940124597 therapeutic agent Drugs 0.000 claims 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 19
- 239000002159 nanocrystal Substances 0.000 abstract description 9
- 239000000243 solution Substances 0.000 abstract description 9
- 238000006862 quantum yield reaction Methods 0.000 abstract description 8
- 239000003929 acidic solution Substances 0.000 abstract description 5
- 239000012670 alkaline solution Substances 0.000 abstract description 4
- 239000011812 mixed powder Substances 0.000 abstract description 3
- 238000012984 biological imaging Methods 0.000 abstract description 2
- 238000007626 photothermal therapy Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 238000003701 mechanical milling Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 18
- 239000002244 precipitate Substances 0.000 description 16
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 7
- 229910017604 nitric acid Inorganic materials 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 229910017677 NH4H2 Inorganic materials 0.000 description 4
- 239000011324 bead Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 229910017119 AlPO Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229940001007 aluminium phosphate Drugs 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- FGHSTPNOXKDLKU-UHFFFAOYSA-N nitric acid;hydrate Chemical compound O.O[N+]([O-])=O FGHSTPNOXKDLKU-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
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- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G21/00—Compounds of lead
- C01G21/006—Compounds containing, besides lead, two or more other elements, with the exception of oxygen or hydrogen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- B82Y40/00—Manufacture or treatment of nanostructures
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- C01B25/00—Phosphorus; Compounds thereof
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- C01B25/26—Phosphates
- C01B25/36—Aluminium phosphates
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- G01N21/64—Fluorescence; Phosphorescence
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- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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Abstract
The invention relates to a high-stability all-inorganic perovskite/aluminum phosphate composite nano material as well as a preparation method and application thereof. CsPbX by mechanical milling3Fully grinding and uniformly mixing the precursor of the nano crystal with the aluminum oxide and ammonium dihydrogen phosphate solid; sintering the mixed powder at high temperature to obtain AlPO4Package with a metal layerCsPbX of3A nanocrystal; placing the sintered sample in an acid solution for washing to obtain the high-stability CsPbX3@AlPO4The prepared nano material can be stably dispersed in ethanol, water, acidic and alkaline solutions. The nano material can be stably placed in the air for more than 1 year, and the fluorescence quantum yield is still kept unchanged. The invention realizes the preparation of the ultrahigh stable perovskite nanocrystalline and has potential application in the aspects of light-emitting diodes, biological imaging and photothermal therapy.
Description
Technical Field
The invention relates to the technical field of inorganic nano materials, in particular to a high-stability all-inorganic perovskite/aluminum phosphate composite nano material as well as a preparation method and application thereof.
Background
In recent years, all-inorganic perovskite nanocrystals, as an emerging semiconductor material, have many excellent properties, including low preparation cost, high fluorescence quantum yield, adjustable emission spectrum in the visible light range, and the like, so that they have been remarkably developed in photoelectric devices, photocatalysts, and the like. However, the ionic property of the all-inorganic perovskite makes the perovskite very sensitive to water, oxygen, light and heat, and the structure of the all-inorganic perovskite nanocrystal is easily damaged. In practical applications, researchers have addressed this problem by improving the stability of the perovskite nanocrystals themselves.
At present, people usually select silicon dioxide, aluminum oxide, organic matters and the like to coat the perovskite, and then the contact between the perovskite and water oxygen is blocked, so that the stability of the perovskite is improved. However, the methods reported at present still have disadvantages in improving the stability of perovskite, such as long-term storage, heat treatment and dispersion in acidic solution. Therefore, the method has important significance for preparing the all-inorganic perovskite nano material which can realize long-time storage, heat treatment and dispersion in an acidic solution.
Disclosure of Invention
The invention aims to provide a method for preparing high-stability all-inorganic perovskite nanocrystalline, the prepared nanocrystalline can be stably dispersed in ethanol, water, acid and alkaline solutions, the nanocrystalline can be stably placed in the air for more than 1 year, and the initial fluorescence quantum yield is kept.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-stability all-inorganic perovskite/aluminum phosphate composite nano material comprises perovskite and aluminum phosphate; the aluminum phosphate is wrapped around the perovskite.
Preferably, the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial consists of a perovskite and aluminum phosphate wrapping the perovskite.
The invention discloses a preparation method of the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial, which comprises the following steps of mixing and grinding a perovskite precursor, aluminum oxide and ammonium dihydrogen phosphate, and then sintering at high temperature to obtain a sinter; and washing and drying the sinter to obtain the high-stability all-inorganic perovskite/aluminum phosphate composite nano material.
Preferably, the perovskite is CsPbX3The perovskite precursor is Cs2CO3、PbX2And NaX; x is halogen and is one or more of Cl, Br and I.
Preferably, Al2O3(alumina), NH4H2PO4(ammonium dihydrogen phosphate), Cs2CO3、PbX2The mass ratio of NaX is (0.5-10): (5-20): 1: (1-1.5): 0.5-2).
Preferably, the milling is ball milling; more preferably, the rotation speed of the ball mill is 300-600 rpm, and the time is 1-5 h.
Preferably, the high-temperature sintering is carried out at the temperature rise rate of 2-10 ℃/min from room temperature to 400 ℃, and the temperature is kept for 5-30 min; further preferably, the high-temperature sintering is carried out in air; and after the high-temperature sintering is finished, naturally cooling in the air.
Preferably, the washing is acid washing, water washing and alcohol washing; more preferably, the concentration of the acid is 1-6M.
The invention discloses application of the high-stability all-inorganic perovskite/aluminum phosphate composite nano material in the fields of light-emitting diodes, biological imaging and photothermal therapy.
Advantageous effects
The all-inorganic perovskite/aluminum phosphate composite nano material has extremely high stability: 1) the material is placed in humid air for one year, and the fluorescence quantum yield can still keep the initial value; 2) the material can stably exist in an acidic solution and an alkaline solution, and the fluorescence intensity is not obviously changed after the material is placed for half a year; 3) after the material is heated for 24 hours at the high temperature of 300 ℃, the initial fluorescence intensity is still kept; 4) the material still maintained 88% of the initial intensity after 1000 h UV exposure.
Drawings
FIG. 1 is a photograph of a sample prepared in example 1 under a fluorescent lamp;
FIG. 2 is a photograph of a sample prepared in example 1 under an ultraviolet lamp;
FIG. 3 is an XRD of a sample prepared in example 1;
FIG. 4 is an elemental distribution diagram of a sample prepared in example 1, wherein the scale bar is 500 nm;
FIG. 5 is a graph showing the change in fluorescence intensity of samples prepared in example 1 in different pH solutions for half a year;
FIG. 6 shows the sample prepared in example 1 and CsPbBr3/AlPO4(from PbBr)2、Cs2CO3、AlPO4Direct milling preparation) and CsPbBr prepared by traditional method3And (4) comparing the fluorescence intensity of the heated nanocrystals.
Detailed Description
The method for preparing the high-stability all-inorganic perovskite/aluminum phosphate composite nano material comprises the following steps:
the method comprises the following steps: weighing a certain mass of reaction precursor, putting the reaction precursor into a ball milling tank, and carrying out mechanical ball milling;
step two: treating the mixed powder at high temperature;
step three: washing the sintered sample, and drying to obtain the high-stability CsPbX3@AlPO4And (4) nanocrystals.
The raw materials involved in the invention are all commercial products, and the operations of ball milling, sintering and washing are conventional methods; the technical scheme of the invention is carried out under the conventional environment unless specially stated.
Example 1 preparation of high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial
Step 1: 0.5 g of Al is weighed2O3、4.6 g NH4H2PO4、1.63 g Cs2CO3、2.75 g PbBr2And 0.5 g of NaBr are put into a quartz ball milling tank, the ball milling tank is sealed after ball milling beads are added, and mechanical ball milling is carried out, wherein the ball milling rotation speed is 400 rpm, and the time is 2 hours;
step 2: transferring the ball-milled powder to a ceramic crucible, placing the ceramic crucible into a muffle furnace to obtain 8oC/min is increased from room temperature to 400oC, taking out immediately after heat treatment for 15 min, and naturally cooling in the air;
and step 3: putting the heat-treated sample into 2M nitric acid aqueous solution for conventional ultrasound for 20 min, then centrifuging at 6000 rpm for 5 min, taking the lower-layer precipitate, washing the lower-layer precipitate once with nitric acid by the same method, then adding 60 mL deionized water into the lower-layer precipitate, performing conventional ultrasound for 20 min, then centrifuging at 6000 rpm for 5 min, taking the lower-layer precipitate deionized water for the same washing, then washing the lower-layer precipitate once with 50mL ethanol by the same method, taking the precipitate, 70oC, obtaining a powder sample CsPbBr after drying treatment3@AlPO4The powder obtained in FIG. 1 was pale green under fluorescent light, and showed a very bright green color under UV light as shown in FIG. 2. As shown in FIG. 3, CsPbBr was present in the prepared powder in a cubic phase3Crystals and AlPO4. The element distribution shown in fig. 4 can find that Cs, Pb, Br, Al and P elements are uniformly distributed inside the nanoparticles. Demonstration of CsPbBr3The nanocrystalline is coated on AlPO successfully4In (1).
Comparative example
Step 1: weighing 8 g AlPO4、1.63 g Cs2CO3、2.75 g PbBr2And 0.5 g of NaBr are put into a quartz ball milling tank, the ball milling tank is sealed after ball milling beads are added, and mechanical ball milling is carried out, wherein the ball milling rotation speed is 400 rpm, and the time is 2 hours;
step 2: transferring the ball-milled powder to a ceramic crucible, placing the ceramic crucible into a muffle furnace to obtain 8oC/min is increased from room temperature to 400oC, taking out immediately after heat treatment for 15 min, and naturally cooling in the air;
and step 3: putting the heat-treated sample into 2M nitric acid aqueous solution for conventional ultrasound for 20 min, then centrifuging at 6000 rpm for 5 min, taking the lower-layer precipitate, washing the lower-layer precipitate once with nitric acid by the same method, then adding 60 mL deionized water into the lower-layer precipitate, performing conventional ultrasound for 20 min, then centrifuging at 6000 rpm for 5 min, taking the lower-layer precipitate deionized water for the same washing, then washing the lower-layer precipitate once with 50mL ethanol by the same method, taking the precipitate, 70oC, obtaining a powder sample CsPbBr after drying treatment3/AlPO4。
CsPbBr prepared by traditional method3Nanocrystal reference (Nano Lett. 2015, 15(6), 3692-3696.）。
Example 2: preparation of high-stability all-inorganic perovskite/aluminum phosphate composite nano material
Step 1: 0.5 g of Al is weighed2O3、4.6 g NH4H2PO4、1.63 g Cs2CO3、2.75 g PbBr2And 0.25 g of NaCl are put into a quartz ball milling tank, the ball milling tank is sealed after ball milling beads are added, and mechanical ball milling is carried out, wherein the ball milling rotating speed is 400 rpm, and the time is 2 hours;
step 2: the ball milled powder was transferred to a ceramic crucible and placed in a muffle furnace at 7oC/min is increased from room temperature to 400oC, taking out immediately after heat treatment is carried out for 15 min, and naturally cooling in the air;
and step 3: subjecting the heat-treated sample to conventional ultrasonic treatment in 2M nitric acid water solution for 20 min, washing off excessive reactant, centrifuging at 6000 rpm for 5 min, collecting the lower layer precipitate, washing with nitric acid, washing with deionized water twice, washing with ethanol once, collecting precipitate, and collecting precipitate 70oC, drying to obtain a powder sampleProduct CsPb (Cl/Br)3@AlPO4。
Example 3: preparation of high-stability all-inorganic perovskite/aluminum phosphate composite nano material
Step 1: 0.25 g of Al is weighed2O3、4.6 g NH4H2PO4、1.63 g Cs2CO3、2.75 g PbBr2And 1.5 g of NaI are put into a quartz ball milling tank, the ball milling tank is sealed after ball milling beads are added, and mechanical ball milling is carried out, wherein the ball milling rotating speed is 400 rpm, and the time is 2 hours.
Step 2: transferring the ball-milled powder to a ceramic crucible, putting the ceramic crucible into a muffle furnace, and performing 400 ℃ of reactionoTaking out immediately after C heat treatment for 10 min, with the temperature rise rate of 5oC/min。
And step 3: placing the heat-treated sample in 2M nitric acid solution, performing ultrasonic treatment for 20 min, washing off excessive reactant, centrifuging at 6000 rpm for 5 min, collecting the lower layer precipitate, washing with nitric acid, deionized water, ethanol, and 70% respectivelyoC obtaining a powder sample CsPb (Br/I) after drying treatment3@AlPO4。
Performance of application
Fluorescence intensity was measured using a fluorescence spectrometer (FLUOROMAX-4). The fluorescence quantum yield was tested using the absolute quantum yield measurement system (hamamatsu).
0.1 g of the powder sample CsPbBr of example 1 was added3@AlPO4Respectively adding the existing buffer solution with the pH value of 2, the existing buffer solution with the pH value of 13 and the aqueous solution with the pH value of 7 (the solutions are all 3 mL), placing the solutions in a cuvette, and periodically testing the fluorescence intensity; after the solution is placed for half a year, the fluorescence intensity is not obviously changed, as shown in figure 5, and the powder in the solution is uniformly dispersed without the phenomena of sedimentation, agglomeration and the like. Further, the powder sample CsPbBr of example 13@AlPO4The phenomena of sedimentation, agglomeration and the like do not occur even if the absolute ethyl alcohol is dispersed for half a year.
The powder sample CsPbBr of example 1 was added3@AlPO4The initial value is still maintained after one year of testing the fluorescence quantum yield in room temperature air with a humidity of 65%.
The powder sample CsPbBr of example 1 was added3@AlPO4Comparative powder sample CsPbBr3/AlPO4And powder sample CsPbBr3The sample was placed in an environment (air) at 300 ℃ and heated continuously, and the fluorescence intensity was measured periodically, as shown in FIG. 6. In addition, after 24 hours at 300 ℃, the samples of examples 2 and 3 can also maintain more than 95% of the original fluorescence intensity.
The powder sample CsPbBr of example 1 was added3@AlPO4The irradiation was continued under UV light (365 nm wavelength) and after 1000 h 88% of the initial intensity was still maintained.
The CsPbX is prepared by a mechanical grinding method3Precursors of nanocrystals and Al2O3And NH4H2PO4Grinding and mixing the solids; sintering the mixed powder at high temperature to obtain AlPO4Encapsulated CsPbX3A nanomaterial; washing and drying the sintered sample to obtain the high-stability CsPbX3@AlPO4Composite nano material, i.e. high stability all-inorganic perovskite/aluminium phosphate composite nano material. According to the invention, other raw materials and preparation steps are not needed, the obtained product high-stability all-inorganic perovskite/aluminum phosphate composite nano material is placed in humid air for one year, and the fluorescence quantum yield can still keep an initial value; can stably exist in an acidic solution and an alkaline solution, and the fluorescence intensity does not obviously change after the solution is placed for half a year; after heating for 24 hours at the high temperature of 300 ℃, the initial fluorescence intensity is still kept; after 1000 h of UV irradiation, 88% of the initial intensity was still maintained.
Claims (10)
1. A high-stability all-inorganic perovskite/aluminum phosphate composite nano material is characterized by comprising perovskite and aluminum phosphate; the aluminum phosphate is wrapped around the perovskite.
2. The high stability all-inorganic perovskite/aluminum phosphate composite nanomaterial as claimed in claim 1, wherein the perovskite is CsPbX3。
3. The high stability all inorganic perovskite/aluminum phosphate composite nanomaterial according to claim 1, wherein X comprises Cl, Br, I or a halogen mixed in any proportion thereof.
4. The preparation method of the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial as claimed in claim 1, characterized by comprising the steps of mixing and grinding a perovskite precursor, aluminum oxide and ammonium dihydrogen phosphate, and then sintering at a high temperature to obtain a sintered product; and washing and drying the sinter to obtain the high-stability all-inorganic perovskite/aluminum phosphate composite nano material.
5. The method for preparing the highly stable all-inorganic perovskite/aluminum phosphate composite nanomaterial as claimed in claim 4, wherein the perovskite precursor is Cs2CO3、PbX2And NaX; x is one or more of Cl, Br and I.
6. The method for preparing the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial as claimed in claim 5, wherein Al is2O3、NH4H2PO4、Cs2CO3、PbX2The mass ratio of NaX is (0.5-10): (5-20): 1: (1-1.5): 0.5-2).
7. The preparation method of the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial according to claim 4, wherein the grinding is ball milling; the rotation speed of the ball milling is 300-600 rpm, and the time is 1-5 h.
8. The preparation method of the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial according to claim 4, wherein the high-temperature sintering is carried out at a heating rate of 2-10 ℃/min for heating from room temperature to 400 ℃ and keeping the temperature for 5-30 min.
9. The preparation method of the high-stability all-inorganic perovskite/aluminum phosphate composite nanomaterial according to claim 4, wherein the washing is acid washing, water washing or alcohol washing.
10. The use of the high stability all inorganic perovskite/aluminum phosphate composite nanomaterial of claim 1 in the preparation of light emitting diodes, bio-imaging agents and photothermal therapeutic agents.
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