73results about How to "The synthesis method is simple and fast" patented technology

The invention relates to a gold-sliver alloy two-dimensional ordered nano film prepared by in-situ interface transformation and a method for preparing the gold-sliver alloy two-dimensional ordered nano film. The method adopting a two-step transformation process comprises the following steps: by taking a single-layer polystyrene sphere self-assembled film as a template, preparing a polystyrene-silver nano net film with a controllable thickness by a gas slow release method; transferring the polystyrene-silver nano net film to a solution surface of a chloroauric acid and disodium hydrogen phosphate solution, and obtaining the gold-sliver alloy two-dimensional ordered nano film by carrying out in-situ replacement reaction; and finally, soaking the gold-sliver alloy two-dimensional ordered nano film to remove the polystyrene template. The synthetic method has the advantages of being simple, quick, gentle and low in energy consumption, and meets the requirements of green chemistry; the smallest constitutional unit of the prepared gold-sliver alloy two-dimensional ordered nano net film is a hollow gold-sliver alloy nano particle; and the film has the advantages of being great in specific surface area, good in permeability, low in density and the like, can be loaded on substrates of different types, has the advantages of being convenient to recycle, and easy to enlarge a product, and can be widely applied to the fields of photoelectrocatalysis, biosensing, biological medicine carrying and the like.

The invention discloses a one-dimensional rod-shaped sulfur-copper compound as well as a preparation method and an application thereof and relates to a sulfur-copper compound. The one-dimensional rod-shaped sulfur-copper compound is one-dimensional rod-shaped CuxS, wherein x is greater than or equal to 0 and less than or equal to 2. The preparation method of the sulfur-copper compound comprises the following steps: dissolving inorganic salt of copper in a dimethyl sulfoxide solvent, magnetically stirring to prepare a light green solution, then adding the light green solution into a reaction kettle, subsequently putting the reaction kettle into an air-blowing drying oven for heating and reacting, then centrifugally washing and drying to obtain a black one-dimensional rod-shaped sulfur-copper compound. The one-dimensional rod-shaped sulfur-copper compound can be used for preparing a negative electrode of a lithium ion battery. The one-dimensional rod-shaped sulfur-copper compound is prepared by a solvent thermal synthesis method; the synthesis method is simple and quick; specific surfactants and relevant templates are not required to be added. The prepared material has specific one-dimensional structures; the one-dimensional linear structures can be used for forming a good three-dimensional network structure by cross linking and stacking; the transmission of lithium ion electrons and infiltration of electrolyte are facilitated, so that the one-dimensional rod-shaped sulfur-copper compound has good electro-chemical properties.

The invention discloses a method for preparing multi-nuclear-shell hollow nickel-nickel silicate-CeO2 through methane reforming. The method includes the steps of (1) preparing silicon dioxide nanoparticles; (2) adding nickel precursors into the silicon dioxide nanoparticles, and preparing hollow nickel silicate spheres at the temperature of 50-220oC; (3) dispersing the hollow nickel silicate spheres into mixed liquor of ethyl alcohol and water, adding CeO2 precursors and precipitators, and performing reaction at the temperature of 40-150oC to obtain nickel silicate-CeO2 nuclear shell hollow nanospheres; (4) reducing the nickel silicate-CeO2 nuclear shell hollow nanospheres to obtain the high-dispersion nickel-nickel silicate-CeO2 multi-nuclear-shell hollow catalyst. The prepared multi-nuclear-shell hollow nickel-nickel silicate-CeO2 catalyst has the advantages of high sintering resistance on nickel and CeO2, hyperoxia hole concentration, high carbon deposition resistance, high nickel dispersity, high CeO2 dispersity and the like, and displays high catalytic activity and carbon deposition resistance when being applied to catalytic reaction based on low-temperature methane reforming.

The invention belongs to the technical field of advanced nano-composite materials and particularly provides an inorganic magnetic three-dimensional ordered macro-porous (3DOM) material and a preparation method thereof. The preparation method comprises the following steps: firstly, dispersing magnetic nano-particles and polymer microspheres in a solution, so that the gaps formed by arranging the polymer microspheres in an ordered manner can be filled with the magnetic nano-particles by the evaporation self-assembly of the solution; then, filling the remaining gaps of the polymer microsphere / magnetic nano-particle composite material with inorganic oxide sol by the nano-casting method, so that the ordered composite structure can be fixed; and finally, calcining in the presence of nitrogen to remove the polymer microspheres, so as to obtain the 3DOM material. The magnetic 3DOM material has the advantages of higher magnetic response and higher stability, and the 3DOM material is provided with ordered macro-pores which are communicated on a three-dimensional basis. Therefore, the invention is widely applicable in the aspects of bio-separation, drug delivery, catalytic loading and the like. The preparation method is simple and the materials are easily available. Therefore, the invention is suitable for large-scale production.

The invention discloses a TiO2-Pd-PPy compound photocatalyst and a preparation method and application thereof. The TiO2-Pd-PPy compound photocatalyst is prepared by the steps: ultrasonically dispersing TiO2 in water, adding PdCl2 and a pyrrole monomer into the water, removing dissolved oxygen, and irradiating with a xenon lamp for photooxidation reduction. A one-step simultaneous photooxidation reduction deposition method adopted in the invention can realize precise positioning and loading of the Pd and PPy. In the compound photocatalyst prepared according to the preparation method, the deposition positions of the Pd and PPy are just the photocatalytic reaction active spots of photo-generated electrons and holes, and can effectively promote separation of photon-generated carriers. The prepared TiO2-Pd-PPy compound photocatalyst shows preferable photocatalysis activity, wherein under full gloss, the hydrogen production efficiency of a TiO2-0.5Pd-0.6PPy photocatalyst through photocatalystic decomposition of water can reach 602mumol / h.

The invention discloses synthesis and application of a nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide. The synthesis is characterized in that a cobalt nitride-phosphomolybdenum polyacid ion crystal compound is firstly synthesized, is mixed with polymer polyacrylonitrile for electrostatic spinning, and is roasted to synthesize nano carbon fibers containing cobalt-molybdenum oxide. As an electrocatalyst, the nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide has very catalytic activity, has catalytic activity under different acid and alkaline conditions, and can be used in hydrogen evolution and oxygen evolution fuel cells.

The invention discloses a preparation method of a low-temperature white-light rare earth-organic coordination polymer. The preparation method comprises the following steps: weighing a ligand P-terphenyl-2,2'',4,4''-tetracarboxylic acid (H4L), a rare earth salt Eu2(SO4)3.8H2O, a rare earth salt Tb2(SO4)3.8H2O and a rare earth salt Dy2(SO4)3.8H2O respectively and adding into a glass bottle, wherein the mass ratio of the four components is 8 to 1 to 1 to 7; adding N,N-diethylformamide and distilled water into a mixture; after uniformly mixing by ultrasounds, putting the glass bottle into a drying oven and reacting at 85 DEG C for 4 days; taking out the glass bottle and naturally cooling to room temperature to obtain a yellow rhombus-shaped transparent crystal; washing the crystal with the distilled water and collecting the crystal; airing at room temperature to obtain the low-temperature white-light rare earth-organic coordination polymer. Meanwhile, the invention further discloses fluorescence regulation and control of the low-temperature white-light rare earth-organic coordination polymer. A synthesis method of the compound, provided by the invention, is simple and the compound is simple in structure and can be stored and preserved in the air for a long period.

The invention discloses a method for efficiently preparing nano barium sulfate with uniform particles. Soluble BaS raw ore is used as a raw material to prepare the nano barium sulfate by virtue of pretreatment, main reaction and after-treatment. The method specifically comprises the following steps: adding the raw material soluble BaS raw ore into deionized water, dissolving to obtain a 0.1 to 5 mol / L BaS solution, wherein the BaS solution is used as a reaction solution a for standby use; preparing a sulfuric acid solution with the same concentration as the reaction solution a, wherein the sulfuric acid solution is a reaction solution b which is used for the standby use; pumping the reaction solution a and the reaction solution b into a micro reactor to react at a speed of 50 to 150 ml / min, standing for 0.1 to 20 s in the micro reactor, collecting a product c at an outlet of the micro reactor, and recovering H2S gas generated in the main reaction; and centrifuging, washing and drying the product c to obtain a target object nano barium sulfate with uniform particles. The nano barium sulfate product prepared by the method has the characteristics of uniformity in size distribution, good dispersity, narrow distribution of particle size and the like, and the particle size of the product is in a range of 30 to 50 nm.

The invention discloses a method for synthesizing 4-methoxyphenoxylalkyl salt. 4-metoxyphenol, chloro-acid, and sodium hydroxide are taken as raw materials to perform the etherification reaction in a reactor, the mol ratio of the raw materials of 4-metoxyphenol to chloro-acid to sodium hydroxide is equal to 1 to 1.0-1.3 to 2.0-2.5, and the mixer reacts for half an hour to 3.0 hours at a temperature of between 70 and 130 DEG C under the pressure of between 0 and 0.1MPa. The reaction product is acidified by acid and is neutralized by alkali to produce the 4-methoxyphenoxylalkyl salt. The method has the advantage that: 4-methoxyphenoxylalkyl sodium or calcium salt produced by artificial synthesis has the effect of inhibiting sweet taste. The synthetic method is simple, convenient and quick, and has less secondary reaction, high yield and low cost.

The invention belongs to the field of geochemistry and in particular relates to a method for synthesizing a hydrocarbon coated standard sample for correcting a gas-liquid ratio measured by a laser confocal scanning microscope. The standard sample can be used for correcting the laser confocal scanning microscope and calibrating the error of the measured hydrocarbon coated gas-liquid ratio, and the gap in the field is filled. The method for synthesizing the hydrocarbon coated standard sample comprises the following steps: setting the temperature; preparing a saturated solution and sealing; filling a standard oil sample; evaporating and crystallizing the solution; separating the crystal; making the sample piece; performing microscopic observation and sorting the hydrocarbon coated body; and calculating the theoretical gas-liquid ratio. The hydrocarbon coated body synthesis method has the characteristics that the method is simple, convenient, simple in operation, low in cost and good in effect, the sample is transparent and easy to observe, the amount of the synthesized hydrocarbon coated bodies is large, the theoretical gas-liquid ratio is easy to calculate and the like.

The invention discloses a preparing method of a nanotube-nickel-nickel cobalt silicate catalyst. The preparing method includes the following steps: (1) dispersing a carbon nanotube in a surfactant, adjusting the pH to 10-14, and adding a silicon source to obtain a carbon nanotube-SiO2 coaxial nuclear shell nanotube; (2) adding nickel precursors and cobalt precursors into the carbon nanotube-SiO2 coaxial nuclear shell nanotube, adjusting the pH to 8-13, and preparing a carbon nanotube-nickel cobalt silicate coaxial nuclear shell nanotube at the temperature of 50-220oC; (3) reducing the carbon nanotube-nickel cobalt silicate coaxial nuclear shell nanotube at the temperature of 300-800oC in a 5% nitrogen atmosphere to obtain the carbon nanotube-nickel-nickel cobalt silicate coaxial nuclear shell catalyst. The obtained catalyst has the advantages of high specific surface area, high catalytic activity in oxygen evolution reaction, high catalytic activity in oxygen reduction, high electric conductivity, low cost and the like; when the catalyst serves as an electrode material for lithium oxygen batteries, by-products such as lithium carbonate can be inhibited, and both the battery discharging capacity and the cycle index are high.

The invention discloses a plastic scintillator microsphere applicable to the field of nuclear detection, and a preparation method and application thereof. The scintillator resin components comprise a matrix material, a scintillating substance and a wave shifter, the particle size of the plastic scintillator microsphere is smaller than or equal to 1mm, and more specifically, the matrix material of the plastic scintillator microsphere is formed by polymerizing an unsaturated matrix monomer containing an active group, and the matrix monomer is styrene or vinyl toluene. The scintillating substance is 2, 5-diphenyl oxazole, and the wave shifter is 1, 4-bis (5-phenyl oxazole) benzene or-bis-(sigma-methyl styryl) benzene. The microspheres disclosed by the invention have very good physical and chemical stability, and have the advantages of low raw material price, wide raw material source, simple and convenient preparation method and the like. The plastic scintillator provided by the invention can be applied to continuous monitoring of radioactivity of a solution, or can be applied to preparation of a liquid scintillation spectrometer.

The invention belongs to the technical field of adsorption materials, and discloses a magnetic adsorption material containing humic acid as well as a preparation method and an application thereof. The method comprises the following steps: 1) taking iron-containing solid waste and organic solid waste as precursors of the humic acid-containing magnetic adsorption material; 2) roasting the humic acid-containing magnetic adsorption material precursor to obtain a magnetic adsorption material; or 3) carrying out secondary hydration oxidation on the magnetic adsorption material to obtain the humic acid-containing magnetic adsorption material. The method is simple and low in cost, the prepared adsorption material has good adsorption performance on heavy metal ions, dyes and antibiotics, and the purpose of treating waste with waste is achieved. The adsorption material is excellent in magnetic property, high in chemical stability and excellent in regeneration performance, and meets the requirements of large-scale industrial production and popularization and use. The adsorption material is used for removing heavy metal ions, dyes and / or antibiotics in a water body.

The invention provides fluorescent carbon quantum dots with scale inhibition performance as well as a preparation method and application of the fluorescent carbon quantum dots. The preparation methodof the carbon quantum dots comprises the following steps: dissolving polyacrylic acid (PAA) in deionized water, adding polyamine, and uniformly mixing; and then carrying out a closed hydrothermal reaction, cooling the reaction liquid to room temperature after the reaction is finished, and filtering to obtain filtrate that is a solution of the fluorescent carbon quantum dots with the scale inhibition performance. The obtained fluorescent carbon quantum dots have high scale inhibition performance, have good scale inhibition performance on calcium phosphate, calcium sulfate and calcium carbonate,and provide a brand-new idea for preparing the green and environment-friendly scale inhibition type fluorescent carbon quantum dots.

The invention relates to biological-based polyamide and apreparation method thereof. Biological bases 1,9-azelaic acid and 1,10-decamethylene diamine prepared by adopting renewable biological resources perform direct melting condensation reaction, the biological-based polyamide can be obtained and is specifically biological-based polyazylenediamine.Only water is used as a solvent in the whole synthetic process without any organic solvent or additive, so that the phenomenon that introduced organic solvents and additives change the physical and chemical parameters and properties of the monomersand amine salt in the polymerization process and accordingly the whole polymerizing technological process is influenced can be prevented. The water is used as the solvent, so that the biological-based polyamide is clean and environmentally friendly and conforms to the purpose that biological-based high-molecular materials are green, environmentally friendly and cyclically regeneratable. In addition, the water is used as the solvent, a reaction medium is provided in the polymerization process, and energy transfer, charging and follow-up reaction are promoted.

The invention provides a preparation method of a Ru nano-material with different morphologies and application of the preparation method. The preparation method of the Ru nano-material with the different morphologies comprises the steps that (1) a Ru source is added into ethylene glycol for sufficient and uniform stirring; (2) then different gas is introduced, and reaction, cooling, washing and drying are carried out under 120-200 DEG C; and (3) an obtained catalyst and carbon black are mixed uniformly, drying is carried out after uniform ultrasound, then thermal treatment is carried out to obtain Ru / C, and the Ru / C is used for an electrochemical performance test. Ru is uniformly distributed on the carbon black, and Ru presents a shape of a nanowire, a nano sheet clip and nano-particles; the OER performance of the Ru nanowire, the nano sheet clip and the nano-particles greatly exceeds industrial RuO2 and industrial IrO2 catalysts under the acidic condition, and voltages corresponding tothe electric current density of 10mA / cm<2> of the OER performance of the Ru nanowire, the nano sheet clip and the nano-particles separately reach 224mV, 286mV and 252mV (vs.RHE) under the acidic condition. The catalyst has good stability under the acidic condition. The preparation method of the Ru nano-material with the different morphologies is simple, the catalyst has higher activity and stability, and a better application prospect is achieved on the aspect of electrolysed water.

The invention discloses an amphoteric ligand-based lead metal-organic framework material and a preparation method thereof. The preparation method comprises the following steps: adding H3cbdcpCl and Pb(NO3)2 into a mixed solution composed of deionized water, acetonitrile and methanol, uniformly mixing, and heating in a reaction kettle to react for a period of time, thereby obtaining yellow rhombictransparent crystals, namely the metal-organic framework material of lead. The metal-organic framework material of lead is a novel three-dimensional metal-organic framework which is constructed by amphoteric ligands and has a three-dimensional SrAl2 topological structure, has good water stability, can be used in a water environment, has stable properties and can be stored in air for a long time. The synthesis method disclosed by the invention is simple and rapid, low in cost, high in yield, high in repeatability and easy for mass production, popularization and use. The lead metal-organic framework material has strong fluorescence emission in an ultraviolet light-visible light region, is suitable for fluorescence detection in the field of water pollution, and can selectively detect Cr2O7<2->, CrO4<2-> and Fe<3+> ions in sewage through the change of fluorescence intensity.

The invention discloses diphosphate containing NO donors, which has the following structural general formula, wherein R1 is an aliphatic hydrocarbon, an aromatic ring or a nitrogen-containing heterocyclic ring containing 1 to 2 NO-donors; X is a group of -H, -OH, -NH2 and the like; Y is oxygen, sulfur or amino; and n is an integer between 2 and 9. A derivative of the diphosphate not only has the effect of inhibiting bone absorption, but also has the effect of promoting bone cells, and can be used for preventing and treating bone metabolic diseases such as osteoporosis and the like. The invention also discloses preparation and application of the diphosphate containing the NO donors.

The invention provides a preparation method of multi-aperture manganese dioxide. The preparation method comprises the following steps: S1), preparing manganese acetate gel A; S2), preparing manganeseacetate gel B; S3), preparing manganese acetate gel C; S4), sequentially applying the manganese acetate gel A, the manganese acetate gel B and the manganese acetate gel C to flake graphite, and then drying; and S5), heating to obtain multi-aperture manganese dioxide. By directly synthesizing manganese dioxide on flake graphite, the synthesis method is simple and convenient. Starch molecules with different pore sizes are used for making pores of manganese dioxide to form multi-aperture manganese dioxide. Pores are movable when a three-level pore structure is heated, the large pores in the mostsuperficial surface move downwards while the small pores in the innermost surface move upwards, and the pores become more uniform by moving and merging, thereby further increasing the conductivity ofmanganese dioxide. The synthetic method is beneficial to environment protection, and manganese acetate and starch are both simple and easily available material that can be used in large-scale industrial production.

The invention discloses a method for improving the luminous efficiency of complexes of europium. The method comprises the following steps: putting ligands such as quinoline-2-carboxylic acid, europium acetate and sodium ethoxide into a reactor, adding ethanol into the reactor, carrying out ultrasonic treatment for 5 to 15 minutes and uniformly mixing; then putting the reactor on a magnetic stirrer and then stirring at normal temperature for 18 to 30 hours; filtering a mixture, and heating and dissolving filtering residues with N,N-dimethylformamide (DMF) and water (H2O); then volatilizing the mixture at the normal temperature to obtain a colorless and cubic single crystal product [Na2Eu2(qc)6(CH3COO)2(H2O)4].2DMF. The method for improving the luminous efficiency of the complex of the europium, disclosed by the invention, has the advantages that simplicity and easiness in operation are realized; coordination spheres of europium ions can be protected effectively from being affected by water molecules, and the quantum yield of the complexes is increased by five times.

The invention discloses a titanium monoxide nano-material and a preparation method thereof. A hydrophobic titanium monoxide nano-material is prepared by a high temperature pyrolysis method; and then amphiphilic molecules are used for modification, so that a titanium monoxide nano-material aqueous solution with good dispersibility is obtained. The obtained titanium monoxide nano material can generate a large amount of active oxygen under an ultrasonic condition and can be effectively used for sonodynamic therapy of tumors; and the sonodynamic therapy effect is obviously superior to that of theexisting commercial nano material. In addition, the invention discloses application of a titanium monoxide nano material in an anti-tumor preparation.

The invention discloses a synthetic method for basic ionic liquid. The basic ionic liquid disclosed by the invention is synthesized in a salt exchange manner by adopting the two-step synthetic method. The synthetic method has the advantages that the basic ionic liquid not only has the advantages of inorganic base and is simple to operate, but also has the new characteristics of stability in water and air, easiness for separation and high catalytic efficiency and reusability; in the base catalysis process, a novel environmental-friendly base catalyst possibility is provided. The basic ionic liquid is easy to regulate, has no volatility or corrosivity and can be miscible with various organic solvents, and thus, the basic ionic liquid shows huge potential of replacing a conventional base catalyst and has important industrial application prospect.

Provided is a synthetic method of cyhalothrin water base type microemulsion. After raw materials are mixed, the method that emulsification water and oil are mixed is used for making the water base type microemulsion, and the raw materials comprise, by weight, 2%-4% of cyhalothrin, 8%-10% of solvents, 22%-26% of surface active agents, 6%-9% of cosurfactant and the balance deionized water, wherein the surface active agents are formed by compounding TX-100 and CTAB according to the molar ratio of (1-5):(1-5).

The invention discloses a synthesis method of an alkaline ionic liquid. The alkaline ionic liquid is synthesized through salt exchange with a two-step synthesis method. The synthesis method has the advantages as follows: the alkaline ionic liquid has the advantages of inorganic base, is simple to operate, is stable in water and air and easy to separate and has new features of high catalysis efficiency and reusability, and a new and environment-friendly base catalyst is provided in the base catalysis process. Given that the alkaline ionic liquid is easy to adjust, doesn't have volatility or corrosiveness and can be mixed with a lot of organic solvents, the alkaline ionic liquid has huge potential for replacing a conventional base catalyst and has significant industrial application prospect.

The invention provides a supercapacitor electrode material and a preparation method thereof. A composite material with a core-shell structure formed by taking a hexagonal sheet-shaped specific crystalline nickel hydroxide as a core and a porous sheet-shaped specific crystalline manganese dioxide as a shell is arranged on the surface of a base material of a foamed nickel,. Electrode material was prepared by electrodeposition of manganese dioxide layer on foamed nickel substrate after hydrothermal reaction is performed to obtain nickel hydroxide. The supercapacitor electrode material is composedof two special crystalline forms of nickel hydroxide and manganese dioxide, which are combined on the porous material. The working electrode is tested by three-electrode system. The potential windowwidth of the working electrode is up to 1V, which is about 70% higher than the potential window of 0.4-0.6 V of the existing electrode materials. The synthesis method is simple, quick, green and environmental friendly, and the cost is low.

The invention discloses a TiO2-Pd-PPy composite photocatalyst and its preparation method and application. TiO2 is ultrasonically dispersed in water, PdCl2 and pyrrole monomer are added thereto, and after dissolved oxygen is removed, it is irradiated with a xenon lamp to cause photooxidation and reduction. TiO2‑Pd‑PPy composite photocatalyst was obtained. The one-step simultaneous photoredox deposition method used in the present invention can achieve precise positioning loading of Pd and PPy. In the TiO2-Pd-PPy composite photocatalyst prepared by the present invention, the deposition position of Pd and PPy happens to be the photocatalytic reaction active site of photogenerated electrons and holes, which can effectively promote the separation of photogenerated carriers. The prepared TiO2-Pd-PPy composite photocatalyst shows good photocatalytic activity. Under full light, the photocatalytic hydrogen production efficiency of TiO2-0.5Pd-0.6PPy photocatalyst can reach 602 μmol / h.

The invention provides a preparation method of rare earth element modified platinum ruthenium nanoparticles, which comprises the following steps: (1) preparing a mixed solution of a rare earth metal salt, a ruthenium salt and a platinum salt, adding the mixed solution into DMF (Dimethyl Formamide), and fully and uniformly stirring, (2) then introducing hydrogen, reacting at 120-160 DEG C, and then standing and cooling to room temperature to obtain the rare earth element modified platinum ruthenium nanoparticles. Centrifuging, washing and drying reactants to obtain rare earth oxide modified ruthenium platinum nanoparticles; and (3) uniformly mixing the obtained catalyst and carbon black, carrying out uniform ultrasonic treatment, drying, and carrying out heat treatment to obtain PtRu-REE / C which is used for electrochemical performance testing. Wherein the HOR performance of the Pt1Ru1-Er2O3 / C and the Pt1Ru1-EuOx / C nanoparticles under the alkaline condition is superior to that of commercial Pt / C. The method is simple, short in experimental process and mild in condition; a trace amount of rare earth is introduced into a platinum-ruthenium system, fine combination of characteristic structures is generated in combination with a solvothermal synthesis technology, and the obtained rare earth oxide modified ruthenium-platinum nanoparticles show excellent and remarkable HOR performance and are very suitable for large-scale production.

The invention discloses a mesoporous organo-silicon oxide nanosphere with a double-layer egg yolk-eggshell structure and a preparation method thereof. The layer contains thioether bonds, the outer layer contains ethane groups, and both the inner layer and the outer layer have mesoporous channels. The present invention adopts two kinds of organosilicon sources, and sequentially adds organosilane bis[γ-(triethoxysilyl) containing sulfide bond (-(CH3)3-S4-(CH3)3-) to the reaction solution Propyl]tetrasulfide, and organosilane 1.2-bis(triethoxysilyl)ethane containing ethane group (‑CH2‑CH2‑), the introduction of these two organosilicon sources makes the synthesized organic Silica has good hydrothermal stability and chemical activity; moreover, the mesoporous silica ball has regular shape, uniform size, no agglomeration between particles, and a large cavity between the inner and outer layers, which has good Its dispersibility and biocompatibility have great application potential in catalysis, drug delivery, etc.

The invention discloses a synthesis method for preparing a high-cost-performance lithium iron phosphate precursor by controlling crystallization, and relates to the technical field of battery materials, and the synthesis method comprises the following steps: S1) preparing a mixed solution of lithium salt, ferrous salt and phosphate, wherein the pH value of the mixed solution is less than 4; s2) stirring the mixed solution obtained in the step S1) at room temperature, slowly adding alkali to adjust the pH value to 6-7, heating and pressurizing the solution to a set temperature and a set pressure, and carrying out heat and pressure preservation reaction for 1-6 hours; s3) filtering the liquid to obtain a solid precipitate, and washing and drying the liquid to obtain a lithium iron phosphate precursor, wherein the set temperature ranges from 80 DEG C to 120 DEG C and the set pressure ranges from normal pressure to 0.3 MPa. The synthesis method of the lithium iron phosphate precursor disclosed by the invention is simple and rapid, the reaction conditions are easy to control, and the method is convenient to popularize and apply and beneficial to industrial implementation.