47results about How to "Increase the intensity of upconversion luminescence" patented technology

The invention belongs to the technical field of a nano up-conversion luminescent material, in particular relates to a preparation method for a small-sized NaYF4 nano substrate material with a hexagonal phase by inducement with rare earth nano crystal nucleus. In the method, rare earth ions are doped in the NaYF4 nano substrate material so as to obtain a nano material with a low up-conversion luminescence threshold and high luminescence strength. In the method, the small-sized beta-NaYF4 nano substrate material is generated by inducement with a hydrothermal (solvent) process in the presence ofrare earth fluoride nano crystal nucleus, wherein the size of the particle is from 20nm to 200nm, and distribution of the size is even. According to the invention, a preparation method of the small-sized NaYF4 nano substrate material with the hexagonal phase is expanded, and the problem that the NaYF4 nano substrate material, especially water-soluble NaYF4 nano substrate material is difficultly generated at low temperature, is solved. By using the nano up-conversion luminescent material, the demand on biological fluorescent identification probes and disease diagnosis and treatment materials is met, and a foundation is established for the practicable application of the up-conversion luminescent material.

The invention provides a nano glass ceramic up-conversion luminescent material and a preparation method thereof. The up-conversion luminescent material is a nano glass ceramic material which takes TiO2, La2O3 and ZrO2 as base components. The nano glass ceramic up-conversion luminescent material is heavy-metal oxide microcrystalline glass which has high mechanical strength, good temperature stability and good anti-corrosion performance; the nano glass ceramic up-conversion luminescent material has the advantages of low phonon energy, combination of high luminous efficiency of a crystal, easiness for glass preparation and the like, and is a novel up-conversion luminescent material. According to the preparation method of the nano glass ceramic up-conversion luminescent material, under the condition of no use of any glass forming agent, an air suspension container-free condensation technology is adopted to prepare novel heavy metal oxide block glass which cannot be easily obtained under normal conditions.

The invention relates to a luminescent material and a preparation method thereof, particularly relates to a zirconium-ytterbium-holmium tri-doped lithium niobate crystal high-upconversion luminescent material and a method for preparing the same, and aims to solve the technical problems of low luminous efficiency and poor light damage resistance of existing LiNbO3:Ho crystal. The zirconium-ytterbium-holmium tri-doped lithium niobate crystal high-upconversion luminescent material is made of Li2CO3, Nb2O5, ZrO2, Yb2O3 and Ho2O3. The preparation method includes: weighing, mixing, presintering, seeding, shoulder expanding, isometric growing and crystal polarizing, so that the zirconium-ytterbium-holmium tri-doped lithium niobate crystal high-upconversion luminescent material can be obtained. The light damage resistance of the crystal is greatly improved when 2mol%-6mol% ZrO is doped in the zirconium-ytterbium-holmium tri-doped lithium niobate crystal high-upconversion luminescent material, and improved by three orders of magnitude as compared with that of crystal with 0mol% ZrO doped, and the upconversion luminescence intensity of the doped crystal is gradually improved along with increase of Zr ionic concentration.

The invention discloses a preparation method of a water-soluble upconversion fluorescence nano material. The preparation method comprises the steps of (1) preparing a rare earth nitrate solution, wherein the molar ratio of yttrium irons to ytterbium ions to erbium ions in rare earth ions is (60-90):(5-35):(0.5-10); (2) adding lower alcohol and a water-soluble rare earth ion ligand and uniformly mixing, and adding a sodium fluoride aqueous solution to obtain mixed liquid, wherein in the mixed liquid, the molar ratio of fluorine ions to the total rare earth ions is (5-16):1, and the volume of fatty alcohol accounts for 1 / 3-1 / 2 of the volume of the mixed liquid; (3) performing a hydrothermal reaction on the obtained mixed liquid at 200-240 DEG C for 10-24 hours, and after the reaction, performing centrifugal separation on a solid product to obtain the upconversion fluorescence nano material. By adopting the preparation method disclosed by the invention, the prepared upconversion fluorescence nano material takes a hexagonal crystal phase as a main body, has relatively high upconversion luminous intensity and good water solubility, and is applicable to biological markers.

The invention relates to an infrared ray excited strontium aluminate based up-conversion luminescent functional material and a preparation thereof. The up-conversion luminescent material is obtained by doping a rare earth element and / or alkali metal element in a strontium aluminate matrix with a monoclinal structure and is of a monoclinal strontium aluminate structure. The chemical components of the up-conversion luminescent material meet the following chemical general formula: Sr(1-x-y-z)AxMyRzAl2O4, wherein A is one or more of alkali metal elements such as Li<+>, Na<+> and K<+>, and x is larger than or equal to 0 and less than or equal to 0.40; M is selected from rare earth elements such as Ho<3+> and Tm<3+>, and y is larger than or equal to 0.0005 and less than or equal to 0.10; and R is selected from rare earth elements such as La<3+>, Yb<3+> and the like, and z is larger than or equal to 0.001 and less than or equal to 0.30. The strontium aluminate based up-conversion luminescentmaterial has good physical and chemical stabilities, no radioactive contamination, high luminous intensity and adjustable color, is easy to synthesize and can be widely used in the fields of biomolecule fluorescence labeling, lasers, three-dimensional display, infrared detection, forgery prevention, solar batteries and the like.

The invention discloses an up-conversion luminescent structure capable of raising luminescence intensity and a preparation method, wherein the structure comprises a substrate, a metal film layer, a dielectric layer and an up-conversion luminescent layer; the method comprises the steps of depositing Ag or Au on a piece of glass or silicon substrate by vacuum evaporation or direct current sputtering to form the metal film layer; then sputtering a layer of zinc oxide film by radio frequency magnetron sputtering; and finally spin coating a layer of fluorination lanthanum potassium doped with rare earth ion. According to the invention, the fluorination lanthanum potassium doped with rare earth ion is taken as the up-conversion luminescent material to enhance the luminescence intensity of the upper transition luminescent structure; and the thickness of the dielectric layer zinc oxide film is controlled to regulate and control the luminescence intensity of the up-conversion luminescent structure, therefore up-conversion luminescence intensity is enhanced. The up-conversion luminescent structure can be applied in biomedical science, luminescent devices and solar energy cell fields; the preparation technology is simple; the operation is easy and the application prospect is wide.

The invention is an oxyhalogen tellurate upconversion light-emitting, and its characteristic: its components and component contents (mol%) as follows: TeO2 58-80, PbF2 + PbCl2 10-30, BaO + BaF2 0-10, XY (X = Na and K; Y = F and Cl) 0-10, ZnO + ZnBr2 0-10; La2O + Al2O3 0-5, and Yb2O3 + Er2O3 1-4.

The invention discloses rare earth-doped oxyfluoride germanate microcrystalline glass and a preparation method thereof, and belongs to the technical field of luminescent materials. The microcrystalline glass comprises the following components in percentage by mole: 39-55% of GeO2, 5-15% of ZnO, 5-15% of AlF3, 10-25% of BaF2, 1-10% of Na2O, 1-20% of NaF and 0.5-5% of RF2 (R is rare earth elements). The preparation method comprises the following steps: firstly preparing oxyfluoride germanate glass by using a melt quenching method; and then, carrying out micro-crystallization on matrix glass by virtue of a thermal treatment process to obtain transparent oxyfluoride germanate microcrystalline glass, wherein the prepared oxyfluoride germanate microcrystalline glass has good transmission of light in a range from near-infrared rays to visible light, and the up-conversion luminescence of rare earth ions is remarkably enhanced. The prepared rare earth-doped oxyfluoride germanate microcrystalline glass containing NaBaAlF6 nano-crystals is simple in preparation method, high in environmental-friendly safety and relatively low in production cost.

The invention discloses an up / down conversion dual-mode light-emitting nanocrystalline and a preparation method and application thereof, and relates to the technical field of nanocrystalline materials. According to the nanocrystal, rare earth chloride is used as a precursor, and monodisperse rare earth fluoride nanoparticles with small particle sizes are prepared as cores under the joint participation of sodium hydroxide and ammonium fluoride; an epitaxial growth method is used, oleic acid and octadecene are used as a mixed solvent, and the rare earth oleate precursor and sodium fluoride jointly act in a high-temperature solvent to realize coating of the shell rare earth fluoride nanocrystalline. The method is simple in synthetic route operation, uniform in product particle size distribution and high in purity, the nanocrystalline is endowed with stronger red and near-infrared two-region fluorescence by doping different rare earth elements and controlling the sizes of a core and a shell in a core-shell structure, and the nanocrystalline can be used as a potential optical imaging contrast agent due to near-infrared fluorescence, so that the contrast agent has a wide application prospect. Due to red light emission, the prepared nanocrystal can be used as a nano energy converter to be applied to light-triggered therapy.

The invention relates to a heavy metal oxide block glass material for up-conversion of white light and a method for enhancing the illumination intensity of the heavy metal oxide block glass material. The heavy metal oxide block glass material for the up-conversion of the white light consists of the following components in percentage by mass of the glass material: 47wt% to 49wt% of TiO2, 30wt% to 44wt% of La2O3, 3wt% to 4wt% of ZrO2, 0.1wt% to 1.1wt% of Er2O3, 0.3wt% to 6.1wt% of Tm2O3 and 2.7wt% to 11.2wt% of Yb2O3, wherein the sum of the mass percentages of the components is 100%.

The invention relates to a preparation method of a single-green up-conversion fluorescent marking material, in particular to a preparation method of a fluorescent marking material, solving the problems of complicated preparation process, poor chemical stability, easy light injury, toxicity, low detection sensitivity and poor monochromaticity of a traditional preparation method of the fluorescent marking material. The method comprises the following steps of: dissolving Y2O3, Yb2O3, Ho2O3 and Eu2O3 to concentrated sulfuric acid; adding deionized water; adding an LiNO3 solution; adding a complexing agent citric acid; then, adding ammonia to adjust a pH value; drying to obtain dried gel; calcining the dried gel; and naturally cooling to a room temperature to obtain a single-green up-conversion fluorescent marking material. The method has simple preparation process, low reaction temperature and hardly damaged crystal lattice, the single-green up-conversion fluorescent marking material prepared by using the method has high purity, good evenness of particles in 20-50 nm, strong luminescence and favorable monochromaticity.

The invention relates to a method for preparing an upconversion fluorescent material from waste lithium battery electrolyte. The method comprises the following steps of obtaining waste lithium battery electrolyte subjected to impurity removal; adding the waste lithium battery electrolyte into a three-necked flask containing an organic solvent, calcium ions and rare earth ions; after vacuum filling, introducing inert gas for protection; performing heating to a certain temperature; performing high-temperature calcination on the obtained product to obtain a lithium doped CaF2-based upconversion fluorescent material. The method has the advantages that the cost for resource utilization of the waste lithium battery electrolyte is low; the operation process is simple; fluorine ions and lithium ions in the electrolyte are utilized at high values; the obtained lithium doped CaF2-based upconversion fluorescent material has efficient upconversion fluorescent performance through the excitation of 980nm near-infrared light.

The invention discloses a preparation method of a water-soluble upconversion fluorescent nano material. The preparation method comprises following steps: a rare earth nitrate solution containing yttrium ions, ytterbium ions and erbium ions is prepared, a fatty alcohol and a water-soluble rare earth ion ligand are added for uniform mixing, and sodium fluoride aqueous solution is added so as to obtain a mixed solution, wherein (1) molar ratio of fluorinion to the total rare earth ion is (5-16):1, and (2) volume ratio of the fatty alcohol to water in the mixed solution is (0.5-1):1; the mixed solution is subjected to hydrothermal reaction at a temperature of 200 to 240 DEG C, is cooled to room temperature, and is subjected to centrifugation to separate a solid product, and then the water-soluble upconversion fluorescent nano material is obtained. The water-soluble upconversion fluorescent nano material is mainly of hexagonal phase, up-conversion luminescent intensity is high, water solubility is relatively high, and the water-soluble upconversion fluorescent nano material is suitable to be used as a biological marker.

The invention discloses a rare earth photo-thermal nano particle and a preparation method thereof. The rare earth photo-thermal nano particle comprises an inner layer, a middle layer and an outer layer; the inner layer is a light-emitting layer with up-conversion luminescence and optical temperature sensing functions, the outer layer is a heating layer with a photo-induced heating function, and the middle layer is an isolation layer for blocking energy transfer between doping ions of the inner layer and doping ions of the outer layer. The invention further discloses a preparation method of therare earth photo-thermal nano particle. The process and reaction conditions for preparing the rare earth photo-thermal nano particle are simple, and the prepared rare earth photo-thermal nano particle has significantly improved up-conversion luminescence intensity, temperature detection signal-to-noise ratio and photo-thermal conversion performance, so that the rare earth photo-thermal nano particle has great application prospects in tumor targeted photo-thermal therapy.

The invention relates to a magnesium, erbium and ytterbium doped sodium niobate, a preparation method and an application thereof. The preparation method comprises the following steps: S1) dissolving erbium source, ytterbium source, niobium source and sodium source in a solvent, thereby acquiring a mixed solution, wherein the solvent is a mixed solvent of water and ethylene glycol; S2) triggering the mixed solution to react for 24-48h at 260-270 DEG C, filtering and drying, thereby acquiring solid powder; S3) calcining the solid powder for 0.5-2h at 900-1050 DEG C, thereby acquiring the magnesium, erbium and ytterbium doped sodium niobate. The preparation method provided by the invention is a solvothermal method; the preparation process is simple; in the magnesium, erbium and ytterbium doped sodium niobate provided by the invention, under 980nm laser excitation, erbium ion (Er3+) is a rare earth luminescence center, ytterbium ion (Er3+) is a sensitizing ion and magnesium metal ion (Mg2+) is used for increasing the up-conversion luminescence efficiency.

The invention discloses an up-conversion luminescent nanoparticle and a preparation method and application thereof. The preparation method comprises the steps that core-shell-shell structure nanoparticles are prepared from ytterbium acetate, neodymium acetate, thulium acetate, gadolinium acetate, oleic acid and 1-octadecene through a coprecipitation method, and oleic acid (OA) coated up-conversionluminescent nanoparticles (UCNPs) are prepared. The inert shell structure on the outermost layer can greatly reduce luminescence quenching caused by surface defects of outer-layer ligands and nanocrystals and enhance the up-conversion luminescence intensity. Polyacrylic acid (PAA) is adopted to functionalize the surfaces of the nanoparticles, so that the upconversion nanoparticles have good dispersing capacity in an aqueous solution, and directional recognition of copper ions in an aqueous phase system is realized. The up-conversion luminescence intensity obtained by adopting 980nm or 808nm excitation has a good linear relationship with the copper ion concentration. The nanoparticle has the characteristics of good selectivity, low luminescence detection limit and wide linear range. Ethylene diamine tetraacetic acid (EDTA) is added, so that the luminescence of the up-conversion nanoparticles is recovered, and the up-conversion nanoparticles can be recycled.

The invention relates to a lithium-erbium-ytterbium triple-doped sodium niobate upconversion material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving an erbium source, a ytterbium source, a lithium source and a sodium source into a solvent so as to obtain a mixed solution, wherein the solvent is a mixed solvent of waterand ethylene glycol; S2, enabling the mixed solution to react for 24-48 hours at 260-270 DEG C, filtering, and drying so as to obtain precipitate; S3, calcining the precipitate at 900-1050 DEG C for 0.5-2 hours, thereby obtaining the lithium-erbium-ytterbium triple-doped sodium niobate upconversion material. The lithium-erbium-ytterbium triple-doped sodium niobate upconversion material is preparedaccording to a solvent thermal method, and is simple in preparation process; under stimulation of laser of 980 nm, the laser of 980 nm can be effectively converted into upconversion red light and green light by using the lithium-erbium-ytterbium triple-doped sodium niobate upconversion material, and in addition, the light emission strength of upconversion red and green light can be effectively improved by the lithium ions.

The invention discloses a method for realizing quantum regulation and control on upconversion luminescence of a rare earth-doped material based on a micro-nano resonant structure, which comprises the following steps of: modulating a resonant mode, inhibiting radiative transition of a luminescence channel, and promoting particles in various excited states to be redistributed, including the processes of energy transfer and non-radiative transition of the particles among the different excited states, so as to realize quantum regulation and control on the upconversion luminescence of the rare earth-doped material. When the resonance wavelength of the micro-cavity is in the emission wavelength of the nanoparticles, more particles are gathered in the excited state of one allowed channel, so that the light emission of the micro-nano resonant cavity is enhanced, and the light field mode in the micro-nano resonant cavity is corrected; quantum regulation and control are carried out on multi-step electron transition processes (including radiation transition and non-radiation transition) among multiple energy levels through a resonance mode; when the resonant wavelength of the microcavity is at the emission wavelength of the nanoparticles, the up-conversion luminescence intensity at the position can be enhanced, and up-conversion luminescence of other unneeded emission wavelengths can be inhibited, so that the unneeded luminescence process can be inhibited, the luminescence process at the needed specific wavelength can be promoted, and monochromatic luminescence can be realized.

The invention discloses a method for improving up-conversion luminescence intensity of rare earth ion doped inorganic fluoride. According to the method, pre-synthesized rare earth doped inorganic fluoride is mixed with a solution containing alkali metal cations and fluoride ions, an obtained mixture is subjected to a sufficient reaction at a high temperature, the alkali metal cations and the fluoride ions added to the solution all participate in material modification, luminescence quenching centers in the inorganic fluoride can be reduced, and the up-conversion luminescence intensity and the quantum efficiency of the rare earth ion doped inorganic fluoride can be improved greatly.

The invention discloses an erbium ytterbium double-doped lanthanum oxide lutecium laser material, which is characterized by comprising a structure shown in Formula (I): Er2x,Yb2y:(La0.1Lu0.9-x-y)2O3,wherein x is not more than 0.09 and not less than 0.01, and y is not more than 0.07 and not less than 0.01. The invention discloses a preparation method of the erbium ytterbium double-doped lanthanumoxide lutecium laser material, which includes steps of step 1, weighing Er2O3, Yb2O3, La2O3, and Lu2O3 in nitric acid and then heating at constant temperature to obtain mixed solution; adding incendiary agent in the mixed solution and then adding dispersing agent; after completely dispersing, adjusting pH value to 7; continuing the constant-temperature heating and gradually dewatering to obtain gel; step 2, drying the gel and then grinding and calcining; then grinding to obtain nano-powder; step 3, adding sintering aid and absolute ethyl alcohol in the nano-powder to stir, dry and grind so asto obtain the pretreated powder; step 4, pressing the pretreated powder to obtain a blank biscuit; cooling under static pressure to obtain a blank body; step 5, performing constant-temperature vacuumsintering on the blank body to obtain the laser material.

The invention provides a Ho<3+> / Yb<3+> / Gd<3+> co-doped zinc oxide up-conversion luminescent material and a preparation method thereof. The luminescent material comprises ZnO as a base and rare earth elements of Ho<3+>, Yb<3+> and Gd<3+> as doping ions and has a chemical formula of Zn1-x-y-xHoxYbyGdzO. The Ho<3+> / Yb<3+> / Gd<3+> co-doped zinc oxide up-conversion luminescent material has high luminescent intensity. The preparation method has simple synthesis processes and high reproducibility, utilizes environmentally friendly materials having safety and no toxicity and is easy to be industrialized. Through change of a doping concentration of Gd<3+>, the up-conversion luminescent intensity of zinc oxide can be improved obviously. The Ho<3+> / Yb<3+> / Gd<3+> co-doped zinc oxide up-conversion luminescent material has high luminescent intensity and can be used for display, illumination and laser-based counterfeiting prevention.

The invention discloses a method for improving up-conversion luminescence intensity of rare earth ion doped inorganic fluoride. According to the method, pre-synthesized rare earth doped inorganic fluoride is mixed with a solution containing alkali metal cations and fluoride ions, an obtained mixture is subjected to a sufficient reaction at a high temperature, the alkali metal cations and the fluoride ions added to the solution all participate in material modification, luminescence quenching centers in the inorganic fluoride can be reduced, and the up-conversion luminescence intensity and the quantum efficiency of the rare earth ion doped inorganic fluoride can be improved greatly.

The present invention provides a Ho<3+> / Yb<3+> / Li<+> codoped zinc oxide upconversion luminescence material and a preparation method. ZnO is used as a matrix, and rare earth elements Ho<3+> and Yb<3+> and Li<+> are used as doping ions, and the composition formula of the material is Zn[1-x-y-z]Ho[x]Yb[y]Li[z]O. The zinc oxide upconversion luminescence material with high luminescent intensity is prepared through codoping of Ho<3+> / Yb<3+> / Li<+>, the synthesis process is simple, the repeatability is high, employed materials are environmentally friendly, safe and nontoxic, and industrialized production is easy to realize. At the same time, the upconversion luminescence intensity of zinc oxide can be obviously improved by changing Li<+> doping concentration, and can be used to display, illumination, laser anticouterfeit, etc.

The invention discloses an erbium-ytterbium double-doped lanthanum-lutetium oxide laser material, which is characterized in that it includes the structure shown in formula (I): Er 2x ,Yb 2y :(La 0.1 Lu 0.9‑x‑y ) 2 o 3 (I); wherein, 0.01≤x≤0.09, 0.01≤y≤0.07. The invention discloses a preparation method of an erbium-ytterbium double-doped lanthanum-lutetium oxide laser material, comprising the following steps: step 1, weighing Er 2 o 3 , Yb 2 o 3 , La 2 o 3 、Lu 2 o 3 After dissolving in nitric acid, heat at a constant temperature to obtain a mixed solution, add a combustion agent to the mixed solution, and then add a dispersant, adjust the pH to 7 after it is completely dissolved, continue to heat at a constant temperature and gradually dehydrate to obtain a gel; step 2, the gel Grinding and calcining after drying, and then grinding to obtain nano powder after calcination; step 3, adding sintering aid and absolute ethanol to the nano powder, stirring, drying and grinding to obtain pretreated powder; step 4. After pressing the pretreated powder to obtain a green body, then cold isostatic pressing to obtain a green body; step 5, performing constant temperature vacuum sintering on the green body to obtain the laser material.

The invention provides a chondroitin sulfate polysaccharide probe based on an upconversion nanomaterial, a preparation method and application thereof. The present invention uses adipate dihydrazide (ADH) as a bridge to graft up-conversion nanomaterials on the molecular chain of chondroitin sulfate through the coupling of carboxyl amino groups, and through the tumor targeting effect of chondroitin sulfate And based on the luminescent properties of rare earth up-conversion materials, a chondroitin sulfate probe was constructed. Compared with the existing tumor imaging probes, due to the anti-Stokes luminescence characteristics of upconversion nanomaterials, tumor imaging in vivo in normal immune mice can be realized under 980nm excitation, with better biocompatibility and less background fluorescence interference Small and can be used for in vivo and in vitro imaging of tumors.

The invention discloses a preparation method of a water-soluble upconversion fluorescent nano material. The preparation method comprises following steps: a rare earth nitrate solution containing yttrium ions, ytterbium ions and erbium ions is prepared, a fatty alcohol and a water-soluble rare earth ion ligand are added for uniform mixing, and sodium fluoride aqueous solution is added so as to obtain a mixed solution, wherein (1) molar ratio of fluorinion to the total rare earth ion is (5-16):1, and (2) volume ratio of the fatty alcohol to water in the mixed solution is (0.5-1):1; the mixed solution is subjected to hydrothermal reaction at a temperature of 200 to 240 DEG C, is cooled to room temperature, and is subjected to centrifugation to separate a solid product, and then the water-soluble upconversion fluorescent nano material is obtained. The water-soluble upconversion fluorescent nano material is mainly of hexagonal phase, up-conversion luminescent intensity is high, water solubility is relatively high, and the water-soluble upconversion fluorescent nano material is suitable to be used as a biological marker.

The invention belongs to the technical field of a nano up-conversion luminescent material, in particular relates to a preparation method for a small-sized NaYF4 nano substrate material with a hexagonal phase by inducement with rare earth nano crystal nucleus. In the method, rare earth ions are doped in the NaYF4 nano substrate material so as to obtain a nano material with a low up-conversion luminescence threshold and high luminescence strength. In the method, the small-sized beta-NaYF4 nano substrate material is generated by inducement with a hydrothermal (solvent) process in the presence of rare earth fluoride nano crystal nucleus, wherein the size of the particle is from 20nm to 200nm, and distribution of the size is even. According to the invention, a preparation method of the small-sized NaYF4 nano substrate material with the hexagonal phase is expanded, and the problem that the NaYF4 nano substrate material, especially water-soluble NaYF4 nano substrate material is difficultly generated at low temperature, is solved. By using the nano up-conversion luminescent material, the demand on biological fluorescent identification probes and disease diagnosis and treatment materials is met, and a foundation is established for the practicable application of the up-conversion luminescent material.

The invention relates to a magnesium-erbium-ytterbium-tridoped sodium niobate and a preparation method and application thereof. The preparation method includes the following steps: S1: dissolving erbium source, ytterbium source, niobium source, magnesium source and sodium source in a solvent to form a mixed solution; the solvent is a mixed solvent of water and ethylene glycol; S2: the The mixed solution was reacted at 260~270°C for 24~48h, filtered, and dried to obtain a solid powder; S3: Calcining the solid powder at 900~1050°C for 0.5~2h to obtain magnesium, erbium, ytterbium tridoped sodium niobate. The preparation method provided by the present invention is a solvothermal method, and its preparation process is simple; in the present invention, under 980nm laser excitation, in magnesium erbium ytterbium tridoped sodium niobate, erbium ion (Er 3+ ) is a rare earth luminescence center; erbium ions (Er 3+ ) is a rare earth luminescence center; ytterbium ion (Er 3+ ) is the sensitizing ion; metal magnesium ion (Mg 2+ ) for improving the upconversion luminescence efficiency.

The invention relates to a novel infrared light-excited oxide up-conversion light-emitting material of a perovskite structure and preparation thereof, and belongs to the field of photoelectric functional materials. The up-conversion light-emitting functional material has a chemical general formula of AxR[(2-x) / 3]-y-zMyYbzTiO3, wherein A is selected from one or more ions of alkaline metal elements Li<+>, Na<+> and K<+>; R is selected from one or more ions of rare earth elements; M is selected from one or more ions of Er<3+>, Ho<3+> and Tm<3+>; x is greater than 0 and is less than or equal to 0.5; y is greater than or equal to 0.00001 and is less than or equal to 0.15; and z is greater than or equal to 0 and is less than or equal to 0.344444. The up-conversion light-emitting material has the perovskite structure, has the advantages of high physical and chemical stability, low cost, easiness in synthesis, high luminous intensity, controllable size and adjustable color, and can be widely applied to the fields of bio-molecular fluorescence labeling, lasers, three-dimensional display, infrared detection, anti-counterfeit technology, solar cells and the like.

The invention provides a fluorescent probe material as well as a preparation method and application thereof, and belongs to the technical field of inorganic luminescent materials. The fluorescent probe material provided by the invention can emit 980nm up-conversion light under the excitation condition of a 1550nm laser, the excitation light and the emission light are both located in a near-infrared region, no background fluorescence exists in the detection process, and the accuracy is high; moreover, an oleic acid ligand on the surface can enable core-shell nanocrystals to have good dispersity in gasoline, the influence of lead ions on the surface of the core-shell nanocrystals is promoted, the lead ions can effectively capture electrons on the Er<3+> ion excited state energy level, and then the energy transfer efficiency from Er<3+> to Yb<3+> is reduced; therefore, the up-conversion luminescence intensity of Yb <3+> ions at 980nm is gradually weakened along with the increase of the lead ion concentration, and the probe material can be applied to quantitative detection of the lead content in gasoline.