116 results about "Mn doped" patented technology

The invention discloses an oil-soluble Mn-doped CsPb(Cl/Br)3 dual-emission nanocrystal and a preparation method thereof. The preparation method comprises the following steps: (1) synthesizing an all-inorganic CsPbBr3 perovskite nanocrystal precursor; and (2) carrying out halide-ion-exchange-assisted Mn-to-Pb ion exchange. The preparation method is carried out at room temperature, is simple in process and easy to operate, has the advantages of convenient raw material supply and low raw material price, can be completed in a common chemical laboratory, and thus, is easy to popularize. The Mn-doped CsPb(Cl/Br)3 nanocrystal has two emission peaks (perovskite intrinsic emission and Mn ion emission). The Mn-doped CsPb(Cl/Br)3 dual-emission nanocrystal obtained by the preparation method has high 56% fluorescence quantum yield, and can be used for manufacturing ratiometric temperature probes by utilizing the dual-peak-intensity temperature dependence characteristic.

A doping method using a three-step synthesis to make high-quality doped nanocrystals is provided. The first step includes synthesizing starting host particles. The second step includes dopant growth on the starting host particles. The third step includes final shell growth. In one embodiment, this method can be used to form Mn-doped CdS/ZnS core/shell nanocrystals. The Mn dopant can be formed inside the CdS core, at the core/shell interface, and/or in the ZnS shell. The subject method allows precisely controlling the impurity radial position and doping level in the nanocrystals.

The invention relates to a catalyst for low temperature catalytic combustion of polychlorinated aromatic hydrocarbon. The catalyst is Fe, Ni, Cr, Bi or Mn doped with tricobalt tetroxide. The catalyst is used for low temperature catalytic combustion elimination of the polychlorinated aromatic hydrocarbon, and is high in activity, high in chlorine poisoning resistance, long in catalytic life and has few by-products, thus being especially suitable for eliminating the polychlorinated aromatic hydrocarbon by low temperature catalysis. In air, the catalyst can be used for stably converting the polychlorinated aromatic hydrocarbon in the waste into carbon dioxide and hydrogen chloride for a long time at the lower reaction temperature, and the activity of the catalyst is not lowered.

The invention relates to a method of a Mn doped ZnS quantum dots room temperature phosphorescence detecting an enoxacin in the biological body fluids. The invention uses the room temperature phosphorescence properties of the Mn doped ZnS quantum dots, and provides a simple, fast, economical, keen and highly selective method to detect the enoxacin in the biology body fluids; the Mn doped ZnS quantum dots are dissolved to be a solution, a urine sample or a serum sample is diluted into 30, 50 or 80 times for detecting the linear equation of the enoxacin, whose linear range is 0.2-7.2 mu mol/L, and detection limit is 58.6 nmol/L; when the method is used to detect the enoxacin in the biological body fluids, an oxygen scavenger and a inducer are not need to add, and the background fluorescence and the interference of scattered light can be avoided. Simultaneously, due to the high selectivity of the method, when the enoxacin is detected in the biological body fluids, a complex sample pretreatment process is not needed.

The invention belongs to the technical field of preparation of quantum dot nanometer materials, and particularly relates to an aqueous phase synthesis method for transition metal Mn doped ZnSe quantum dots. The method comprises the steps of utilizing inorganic metal water-soluble compounds such as zinc nitrate, manganese chloride and the like and carboxylic acid reagents containing sulfhydryl groups as raw materials, and doping transition metal Mn into ZnSe semi-conductor nano-particles in aqueous solution by a nucleation doping method. The method has the advantages of mild reaction conditions, simple and safe operation, and good repetitiveness, eliminates the toxicity caused by the use of heavy metal elements in the prior quantum dots, and successfully synthesizes non-toxic quantum dots emitting yellow visible light. The quantum dots can be taken as a fluorescent marker to be widely applied to cell and tissue imaging due to low toxicity, and can be applied to in vivo imaging research.

The invention discloses preparation of a mesoporous molecular imprinting fluorescent probe and detection of tetracycline antibiotics by the mesoporous molecular imprinting fluorescent probe, relates to a method for detecting tetracycline antibiotic residues, and aims to solve the problems of tedious sample preprocessing process, long analysis time and high cost of an existing method for detecting tetracycline antibiotic residues as well as the problems of poor target molecule selectivity, relatively small specific surface area and low adsorption amount of an existing molecular imprinting polymer-quantum dot composite material. The preparation method comprises the following steps: 1, preparing a molecular imprinting polymer; 2, preparing a Mn doped ZnS quantum dot; and 3, preparing the mesoporous molecular imprinting fluorescent probe. A use method comprises the following steps: adding the mesoporous molecular imprinting fluorescent probe into a sample solution containing the tetracycline antibiotics, performing ultrasonic treatment for uniform dispersion, and performing fluorescent detection. The mesoporous molecular imprinting fluorescent probe prepared with the method is high in selectivity and high in sensitivity.

The invention relates to a preparation method of a bicolor fluorescent semiconductor nanomaterial based on Mn-doped CuInS2/ZnS. The preparation method comprises the following steps: (1) preparing CuInS2/ZnS quantum dots, purifying the CuInS2/ZnS quantum dots and then dissolving the CuInS2/ZnS quantum dots in n-hexane; (2) adding the CuInS2/ZnS quantum dots obtained by the step (1) into octadecene (ODE), heating to 150 DEG C under an argon gas environment, injecting a mixed solution of Mn(Ac)2 (manganese acetate) and oleylamine and maintaining for 1 hour at the 150 DEG C; then heating to 240 DEG C, injecting the mixed solution of Zn(Ac)2, oleic acid/DDT (Dichloro-Diphenyl-Trichloromethane) and the ODE and reacting for 1 hour at 240 DEG C; and cooling to a room temperature, thereby obtaining the quantum dot nanomaterial of CuInS2 and ZnS: Mn/ZnS. The quantum dot nanomaterial can be used for replacing yellow fluorescent powder to be prepared into a white LED (Light Emitting Diode). The Mn-doped CuInS2/ZnS quantum dots are of a nanomaterial which is nontoxic and environment-friendly, and has two fluorescence peak positions within a visible light range, wherein the peak positions are between 525nm and 590nm or so; the relative strength of the two fluorescence peaks can be regulated by regulating the content of the Mn.

The invention discloses a preparation method of a three-dimensional layered structure Mn-doped CoP nanowire modified nanosheet array material (Mn-CoP NS@NW/NF) which is grown in situ on nickel foam. With cobalt-nitrate hexahydrate adopted as a cobalt source, manganese sulfate monohydrate adopted as a manganese source, ammonium fluoride and urea used to control the shape of the material, foamed nickel used as a substrate, a Mn-Co precursor can be prepared by using a hydrothermal method; and a low temperature preservation type phosphorization is carried out, so that the Mn-CoP NS@NW/NF can be synthesized. When being applied to a supercapacitor self-supporting electrode material, the Mn-CoP NS@NW/NF exhibits extremely high area specific capacitance (8.66 F cm<-2>) in 6 M KOH electrolyte, suchkind of performance of the Mn-CoP NS@NW/NF is much higher than that of an undoped CoP nanowire array material. On the basis of full utilization of the high specific surface area of a nano-array layered structure and the synergistic effects of various metals, the novel energy storage material has the advantages of high area ratio capacitance, long cycle life and low cost.

The invention belongs to the technical field of nanometer new materials, and in particular, relates to a Mn doped Ni3S2 nanoarray hydrogen evolution catalyst and a preparation method and application thereof. Mn doped Ni3S2 nanosheets uniformly and regularly grow on the surface of a foam nickel substrate to form a nanometer sheet array. The preparation method comprises the following steps: pretreated foam nickel, soluble nickel salt, soluble manganese salt and urea are hydrothermally reacted in a reaction kettle to prepare a precursor; the prepared precursor and Na2S solution are positioned inthe reaction kettle for a vulcanization reaction; after reaction, a product is cooled and washed by water to obtain the catalyst. The prepared catalyst is higher in surface roughness and electrochemical electric conductivity; through open space and three-dimensional structure of the foam nickel, the diffusion of electrolytes and escaped hydrogen is facilitated; through the advantages, the positivecontribution is given for improvement of the electrochemical expression; and meanwhile, the preparation method is convenient and easy to obtain materials. The prepared catalyst is applied to the hydrogen evolution reaction under alkaline condition, and achieves excellent electrocatalysis performance and excellent durability.

A Sn—Ag—Cu-based lead-free solder alloy and solder joints thereof with superior drop shock reliability are disclosed. The solder comprises between greater than 0 wt. % and less than or equal to about 1.5 wt. % Ag; between greater than or equal to about 0.7 wt. % and less than or equal to about 2.0 wt. % Cu; between greater than or equal to about 0.001 and less than or equal to about 0.2 wt. % Mn; and a remainder of Sn.

The invention discloses a ZnO-based diluted magnetic semiconductor thin film and a preparation method of the ZnO-based diluted magnetic semiconductor thin film. The analyzed pure metal nitrate is taken as a raw material, and a method 1 comprises the following steps of: obtaining a doped ZnO powder body by a water solution coprecipitation method, sintering by a solid-phase method to obtain a ceramic target material, and preparing into a doped diluted magnetic semiconductor ZnO thin film by a pulsed laser deposition (PLD) method. Or the analyzed pure metal nitrate is taken as a raw material, and a method comprises the step of preparing a doped ZnO-based diluted magnetic semiconductor ZnO thin film through the technological process of preparing sol, spinning and thermally treating by a sol-gel method. The energy gap of the prepared ZnO-based thin film can be adjusted and controlled due to the doping of Mg and Cd, so that the ferromagnetism of the ZnO-base thin film can be adjusted and controlled. The Co-doped or Mn-doped ZnO-based diluted magnetic semiconductor thin film can be co-doped into the Cd, so that band gap can be reduced, and the room-temperature saturation magnetization of the thin film can be enhanced; and the band gap can be enlarged due to the codoping of Mg, so that the room-temperature saturation magnetization of the thin film can be reduced.

The invention provides application of Mn-doped core-shell structure zinc sulfide quantum dot ZnS:Mn/Zn taken as fluorescent security agent, as well as waterborne fluorescent falsification-resistant ink and a preparation method of the waterborne fluorescent falsification-resistant ink. The waterborne fluorescent falsification-resistant ink comprises the following raw materials in percentage by weight: 15-20 percent of n-butanol, 5-10 percent of ZnS:Mn/ZnS quantum dot, 0.5-1 percent of sodium dodecyl benzene sulfonate, 0.1-0.5 percent of foam killer SP-23, 0.1-0.5 percent of polyacrylate sodium, and water in balancing amount. The waterborne fluorescent falsification-resistant ink is colourless under the natural condition while can give out a blood orange light under the radiation of ultraviolet light. In addition, the main components of the waterborne fluorescent falsification-resistant ink comprise alcohol and the waterborne quantum dot, ink additive and less additives, water is the solvent, and the pollution is less, so that the environmental-friendly fluorescent falsification-resistant ink caters for the development trend of fluorescent falsification-resistant ink in the future, and has a broad application prospect.

The present invention discloses a construction method and a detection method of a potassium ion nucleic acid aptamer photoelectrochemical sensor based on a diluted magnetic semiconductor. The construction method comprises: (1) washing a glass electrode; (2) preparing a Mn-doped dendritic zinc oxide nano-rod photoanode; (3) preparing a Mn-doped dendritic zinc oxide nano-rod photoanode film; (4) assembling a potassium ion nucleic acid aptamer on the Mn-doped dendritic zinc oxide nano-rod photoanode surface to obtain a potassium ion nucleic acid aptamer base photoelectrochemical sensor; and (5) fitting a quantitative relationship curve, and calculating the potassium ion content in a sample to be detected. According to the present invention, the Mn<2+>-doped dendritic zinc oxide diluted magnetic semiconductor nano-rod is electrochemically synthesized by using the one-step method so as to be adopted as the photoelectric beacon; and by fitting the quantitative relationship curve, the novel nucleic acid aptamer diluted magnetic semiconductor base photoelectrochemical sensor platform is constructed and is used for ultrasensitive detection of the potassium ions.

The invention discloses Mn-doped aluminum nitride-based red phosphor powder and a preparation method of the red phosphor powder. A chemical formula of the phosphor powder is Al1-xN:Mnx, wherein x is more than or equal to 0.01 and smaller than or equal to 0.1. The preparation method of the red phosphor powder comprises the steps of 1) weighing Al powders, AlN powders and compound powders containing Mn according to the weight of the target phosphor powder to be prepared, mixing uniformly and sieving, wherein the mass ratio of the Al powders to the AlN powders is 3:7-6:4; 2) adding the powders into a multi-hole graphite crucible, then putting into a high-pressure reaction container, vacuumizing, and introducing nitrogen; 3) igniting a ignition agent block at the powder bottom by lighting a graphite paper tape, and charging the graphite paper tape for 5-10s to initiate the combustion reaction under the conditions that the current is 20-30A and the voltage is 50-70V to obtain an incompact massive product; and 4) grinding, crushing and sieving the product to obtain the AlN:Mn2 red phosphor powder. The phosphor powder has the advantages that the light emitting efficiency is high, and the quality is stable. The preparation method has the advantages that the cost of raw materials is low, the process is simple, the speed is high, the needed production device is simple, the energy consumption is loss, and the industrial production is easy to realize.

The invention discloses a method for preparing a Mn-doped bismuth sodium titanate-barium titanate film, comprising the following steps that: high-purity Bi2O3, Na2CO3, BaCO3 and TiO2 are taken as the raw materials and subjected to wet milling by a zirconium ball in absolute ethyl alcohol, drying, tabletting and calcination at a certain air pressure to obtain perovskite structure powder; the obtained perovskite structure powder is subjected to secondary ball milling, drying, tabletting and heat preservation for 1-4 hours at the temperature of 1200 DEG C to obtain a target material by sintering; the target material and the substrate are installed and the target-substrate distance, the sputtering temperature, the power and the frequency are adjusted; after the sputtering, in-situ annealing is performed, the oxygen pressure is maintained and the temperature is lowered to room temperature by naturally cooling to prepare the Mn-doped bismuth sodium titanate-barium titanate film. The orientation and the thickness of the film can be adjusted by technological parameters and the prepared lead-free piezoelectric film shows better ferroelectric and dielectric properties. The method has the advantages of convenience in operation and good repeatability.

The invention provides a preparation method of a sparfloxacin molecular imprinting-quantum dot mesoporous material. The preparation method comprises the following steps: firstly, preparing a preactioncompound from a template molecule sparfloxacin, 3-aminopropyl triethoxy silane and propionic acid sulfenyl methyl acetoxyl propyl trimethoxy silane; secondly, preparing a compound from a surfactant,a cross-linking agent, the preaction compound and L-cysteine modified Mn doped ZnS quantum dots; finally, deluting the template molecule sparfloxacin and the surfactant in the compound, thereby obtaining the sparfloxacin molecular imprinting-quantum dot mesoporous material. The invention further provides the sparfloxacin molecular imprinting-quantum dot mesoporous material prepared by using the preparation method, application of the material in detecting the content of sparfloxacin in a sample, and particularly application of the material in detecting the content of sparfloxacin in serum. Thepreparation method provided by the invention is simple in step, and by adopting the molecular imprinting-quantum dot mesoporous material, sparfloxacin in a sample can be rapidly, sensitively and specifically detected.

The invention relates to the technical field of CsPbCl3 nanocrystal material preparation and in particular to a method for increasing the manganese doping concentration and the light emission efficiency of a manganese-doped CsPbCl3 nanocrystal. The method comprises the following steps: preparing a caesium precursor solution; mixing octadecene, oleic acid, oleylamine, tri-n-octylphosphine, lead chloride, lead chloride, manganese chloride and nickel chloride; and forming a Ni-Mn double-doped CsPbCl3 nanocrystal, so as to obtain a Ni-Mn double-doped CsPbCl3 nanocrystal solution. By adopting the method, by adding NiCl2, the crystallinity and the surface defect state of a Mn-doped CsPbCl3 nanocrystal can be improved, the doping concentration of Mn in the manganese-doped CsPbCl3 nanocrystal canbe increased, and the light emission efficiency of the manganese-doped CsPbCl3 nanocrystal can be improved.

The invention discloses a preparation method of a water-soluble Mu-doped CdxMn1-xTe quantum dot. The preparation method comprises the operating step of: filling NaHTe or KHTe solution which is prepared in advance into a mixed solution of cadmium salts, manganese salts and water-soluble N-acetyl-L-cysteine which is prepared in advance under nitrogen protection so as to obtain a water-soluble Mn-doped CdxMn1-xTe quantum dot with an adjustable fluorescence emission wavelength and a high fluorescence quantum yield. The preparation method is carried out in an aqueous solution, and has the advantages of being easy to obtain the raw materials, simple, convenient and safe to operate, green and environment-friendly, and the like. The prepared water-soluble Mn-doped CdxMn1-xTe quantum dot has the advantages of excellent fluorescence properties, good water solubility, excellent fluorescence property, good biocompatibility, low toxicity and the like, and can be used as a novel fluorescent nanoemter probe to be widely applied to the fields of biochemical analysis and biomedicine.

The invention belongs to the field of lithium ion battery materials, and specifically discloses the application of Mn-doped lithium ferrate. Mn-doped lithium ferrate is added to a positive electrode active material as a lithium supplement additive, and used to prepare a lithium supplement positive electrode material of a lithium ion battery. The chemical formula of Mn-doped lithium ferrate is Li5Fe1-xMnxO4, wherein x is from 0.05 to 0.1. The invention further provides the preparation method of Mn-doped lithium ferrate used in the application method. An iron source, a manganese source and a lithium source in a stoichiometric ratio are ball-milled in a surfactant solution, and then spray-dried to acquire a precursor. The precursor is sintered in a protective atmosphere at 600 to 900 DEG C toacquire the Mn-doped lithium ferrate. The invention further provides the application of the lithium supplement positive electrode material and the application of the positive electrode material in the lithium ion battery. The invention finds that the lithium supplement additive and the positive electrode active material have synergy. In addition, the invention further provides the preparation method which has the advantages of simple operation, short preparation period and high product activity.

The invention discloses a static preparation method of a manganese-doped lead-cesium halide fluorescent glass thin film. The static preparation method comprises the following steps of firstly, dissolving cesium carbonate and oleic acid in 1-octadecene, and obtaining a cesium oleate solution under a nitrogen protection condition; secondly, rapidly injecting the cesium oleate solution into a manganese-doped lead halide salt solution which is completely dissolved and has a temperature range of 140-200 DEG C to obtain a product, namely Mn-doped CsPbX3 quantum dot, and performing centrifugal purification, wherein the quantum dot can be dissolved in n-hexane and methylbenzene; and finally, coating the prepared Mn-doped CsPbX3 quantum dot combined with ink onto a surface of glass to form a layerof thin film with uniform thickness, wherein the thin film is clamped between two pieces of glass, the thin film is hermetically isolated with an external environment by vacuumizing and bubble discharging, and the manganese-doped lead-cesium halide quantum-dot fluorescent glass thin film is obtained. The static preparation method has the advantages that the fluorescent glass thin film is excellentin stability and durability.

The invention relates to a preparation method of Mn-doped CsPbCl3 perovskite nano-crystals and belongs to the technical field of material preparation. The Mn-doped CsPbCl3 perovskite nano-crystals areprepared by a microwave-assisted thermal injection method. The Mn-doped CsPbCl3 perovskite nano-crystals are uniform in size, and the doping concentration of Mn is adjustable and is 0.1-32 percent compared with that of Pb. The Mn-doped CsPbCl3 perovskite nano-crystals prepared by the microwave-assisted thermal injection method are uniform in size and high in quality; the method for preparing theMn-doped CsPbCl3 perovskite nano-crystals, provided by the invention, can quickly synthesize the Mn in large quantities and is simple and controllable in process; through adjusting the reaction temperature, the doping of different concentrations can be effectively achieved, therefore, the repeatability is good.

The invention provides a method for improving the optical property of a high Mn-doped quantum dot. A method for obtaining a Mn-doped CdE quantum dot comprises the following steps of: (1) small-crystal nucleus growth of MnE (E belongs to chalcogens); (2) growth of a ZnE transition layer; and (3) shell growth of CdE, so as to obtain the Mn-doped quantum dot. Compared with the prior art, for the method, the transition layer (ZnE) with certain thickness is introduced aiming at the characteristic of the high mismatch of ion radius of Mn and Cd in the quantum dot, so that the lattice imperfection caused by the mismatch of ion dimension can be effectively reduced, the effective and controllable doping of Mn ions in the quantum dot can be enhanced, and the luminous efficiency can be greatly improved. Experiments prove that the photoluminescence efficiency can reach -70% and further exceeds the highest luminous efficiency of 29% reported in the existing document. Furthermore, light is only emitted by means of the transition emission of the Mn ions 4T1-6A1, so that the problem that the conventional Mn-doped CdE quantum dot always accompanies with the band edge luminescence or defect luminescence can be solved. The method is simple in equipment and controllable in technology, thereby probably being a universal method for improving the optical property of the highly doped quantum dot.

The invention relates to preparation and application of a solid phosphorescent probe material based on a Mn-doped ZnS quantum dot, and aims to solve the problems that a conventional phenol compound detection method is complicated in operation, high in cost and poor in selectivity. The technical scheme is that firstly, Mn is taken as a dopant, the Mn-doped ZnS quantum dot is prepared by the hydrothermal synthesis method, and then the quantum dot and tyrosinase are fixed on fumed silica to prepare the solid phosphorescent probe material based on the Mn-doped ZnS quantum dot. The solid phosphorescent probe material based on the Mn-doped ZnS quantum dot can be used for detecting such phenol compounds as pyrocatechol, phenol and nitrophenol and does not need complicated sample pretreatment during detection; a deoxidant or an inducer does not need to be added for production of room-temperature phosphorescence; a sample can be prevented from interference caused by such scattered light as autofluorescence, Raman and Rayleigh, so that the inspection sensitivity and the inspection selectivity are greatly improved; meanwhile, the solid probe material can be easily separated from a solution tobe detected, the room-temperature phosphorescence performance is recovered, and recovery and cyclic utilization of a phosphorescent probe can be realized.

Convergent nanofabrication and nanoassembly methods are disclosed. Molecules and/or nanostructures are bound to supported binding tools and manipulated to bond together in desired locations and orientations to yield desired precise structures. Methods for precise fabrication of materials including diamond, graphene, nanotube, β-SiC (and precise modifications thereof, e.g. color centers for quantum computation and information processing and storage), halite structured materials including MgO, MgS, TiC, VN, ScN, precisely Mn doped ScN, NbN, HfC, TaC, Hf_xTa_yC, and metals, and graphenoid structures for photovoltaic devices are disclosed. Systems disclosed performing these methods can fabricate systems with similar capabilities, enabling allo- or self-replication, and have capabilities including: conversion and storage of energy; obtainment and processing of matter from abundant environmental sources including on other planets and fabrication of desired articles using same; converting wind power (esp. high altitude wind) to electricity with concurrent capture of CO₂ and conversion thereof to useful feedstocks e.g. by reaction with CH₄ from oceanic methane clathrates; growth of algae crops including food. Fabrication of arbitrarily long carbon nanotubes enable construction of orbital elevators.