230results about How to "Synthesis conditions are simple" patented technology

The invention relates to a fibriuretinin synthesis method. The method takes berberine hydrochloride as a starting material and comprises the following steps: selectively carrying out decomposition reaction on methylenedioxy of the berberine hydrochloride to obtain ortho-dyhydroxyl berberine hydrochloride; carrying out methylation reaction on hydroxyl of the ortho-dyhydroxyl berberine hydrochloride and dimethyl sulfate, recrystallizing, and adding hydrochloric acid to regulate pH value to obtain the target product, i.e. fibriuretinin. The fibriuretinin synthesis method has less synthesis steps, simple technology, and high total yield of 49.3% and the raw materials are easy to collect, so as to reduce cost, improve production efficiency and contribute a new synthesis method for fibriuretinin chemosynthesis industrialization.

The invention discloses a dynamic polymer with a hybrid cross-linked network. The dynamic polymer contains common covalent cross-linking and dynamic covalent organic borate bonds. The dynamic polymerintegrates the respective advantages of the dynamic covalent organic borate bonds and the common covalent cross-linking, and polymeric materials of abundant structures and with diversified propertiescan be prepared by regulating the structures of reactants. The high dynamic reversibility of the dynamic covalent organic borate bonds in the dynamic polymer allows the polymer to present the functional characteristics of stimulation responsiveness, self repair performance; the common covalent cross-linking endows the dynamic polymer with certain strength and stability; moreover, based on the dynamic nature of the dynamic organic borate bonds, the dynamic polymer has the characteristics of energy dissipation and energy absorption and the good functions of damping, shock absorption, sound insulation, impact resistance, high toughness and the like. The dynamic polymer can be used for preparing damping and buffering materials, anti-impact protection materials, self-repairing materials, toughmaterials, force transducers, etc.

The invention discloses a preparation method of a cellulose grafted epoxy vegetable fat anionic polymeric surfactant. The preparation method comprises the following sequentially-connected steps: fully dissolving a cellulose material in a solvent, stirring, heating to 30-70 DEG C, adding epoxy vegetable fat, dropwise adding an initiator solution, reacting for 1-2 h under the condition of heat preservation, and removing the solvent, so that a cellulose grafted epoxy vegetable fat product is obtained; hydrolyzing the cellulose grafted epoxy vegetable fat product under the action of a catalyst, and purifying the obtained object, so that a cellulose grafted epoxy vegetable fatty acid is obtained; and dispersing the cellulose grafted epoxy vegetable fatty acid in water, adjusting the pH value to 7-11, and carrying out distillated dehydration on the obtained product, so that the cellulose grafted epoxy vegetable fat anionic polymeric surfactant is obtained. The preparation method is wide in raw material sources and low in price, the prepared surfactant is biodegradable, mild in synthetic conditions and simple in preparation process, has less pollution to the environment, and accords with the concept of sustainable development.

The invention discloses a polyhydroxyalkanoate synthesis bacterium Pseudomonas lundensis PHA5 and a method for preparing polyhydroxyalkanoate by the culturing and fermentation of the bacterium. The bacterial strain takes glucose as a single carbon source to synthesize shortest-chain and medium-long-chain copolymerized PHA. The synthesis condition of PHA with the single carbon source avoids the requirements on the types and proportion of multifarious carbon sources, therefore simplifying the synthesis condition of the shortest-chain and medium-long-chain copolymerized PHA; the PHA which is composed of multifarious shortest-chain monomers and medium-long-chain monomers has more excellent machinery and processing performance than shortest-chain PHA and medium-long-chain PHA, and has a wider application prospect.

The invention discloses a composite anti-salt agent, which mainly comprises a ferrocyanide solubilizer A and a complexone B, and can further comprise a polymer lattice modifier C and/or water. According to the present invention, the composite anti-salt agent has a synergistic effect, wherein the ferrocyanide solubilizer A in the composite anti-salt agent can substantially increase the solubility of the salt, and provides the main effect of the composite anti-salt agent, the complexone B in the composite anti-salt agent has good complexation effects on metal ions and can change the metal ion concentration of the salt crystal so as to reduce the solubility product of the salt crystal, and the polymer lattice modifier C can change the compact structure of the salt into the loose structure soas to make the salt be easily carried away by the flowing of the solution. According to the present invention, the composite anti-salt agent can provide excellent salt crystallization prevention effect on salt solutions with highly mineralized sodium chloride, and further can provide good salt release effects on salt solutions with highly mineralized sodium chloride, calcium chloride and magnesiumchloride.

The invention belongs to the technical field of novel catalytic material preparation and discloses a NiTi hydrotalcite nanosheet catalyst responding to visible light and a preparation method of the catalyst. According to the invention, NiTi hydrotalcite nanosheets are synthesized by an anti-phase microemulsion method and show excellent catalytic performance by visible light. The preparation method realizes controllability of a microemulsion environment by adjusting and controlling the proportions of a surface active agent and water; and hydrotalcite is crystallized and grows in the microemulsion and the particle size of the hydrotalcite ranges from 30 nm to 80 nm. A solvent used in the method is low in cost and simple to operate and can be recycled. The obtained hydrotalcite nanosheet catalyst has the advantages of simple synthesizing conditions, cheap raw materials and easiness in large-scale industrial production. The NiTi hydrotalcite nanosheet catalyst prepared in the invention has an excellent characteristic of responding to visible light, is five times quicker than micron-sized hydrotalcite synthetized with a traditional codeposition method in water decomposition performance by visible light, and is hopefully expected to be widely applied to the fields like solar thermal utilization, adsorption and additives.

The invention relates to red luminous silicon-oxygen nitride fluorescent material, preparation method and light emitting device using same. The general formula of the fluorescent material is MIuMIIv(Sil-alphaAalpha)wO deltaN(2/3(u+v)+4/3w-2/3delta): Eux, Ry, Dz, wherein MI is a Ca or Sr element; MII is selected from at least one element of Sr or Ca, Ba and Zn; A is selected from at least one element of Ge, Al, Ca and In; R is selected from at least one element of Nd, Dy, Ho, Tm, Ce, Er, Pr, Bi, Sm, Yb, Lu, Gd, Tb and Mn; D is selected from at least one ion of F-, Cl-, Br- and I-; and u, v, w, alpha, delta, x, y and z are molar coefficients. The fluorescent material capable of being excited by ultraviolet-blue-green light and emitting red light is prepared by adopting a normal pressure self-reduction synthesis method and applied to manufacture LED devices.

The invention belongs to the technical field of nano material preparing. A sea-urchin-shaped gold nano particle synthesis method comprises the following steps that firstly, a soluble silver source anda soluble gold source are evenly mixed, a weak reducing agent is rapidly added, stirring is conducted for a certain time, and a silver/gold seed with the rough surface is obtained; and secondly, thesilver/gold seed and a certain number of gold sources are mixed, and after stirring is conducted for 20 s, centrifugal separation is conducted, the mixture is scattered into deionized water again, andsea-urchin-shaped gold nano particles are obtained. By means of the method, the sea-urchin-shaped gold nano particles high in yield and adjustable in particle size and surface spine density, length and width can be obtained. The gold nano particles with different spine structures have different ultraviolet-visible absorption spectra, and adjustable red shift of an LSPR peak can be shown. In addition, the gold nano particles, namely the sea-urchin-shaped gold nano particles different in spine structure can have different degrees of enhancing functions on raman signals. The method has good application potentials on surface enhanced raman scattering.

The invention discloses a molecular bottle brush type reverse phase adsorbent and a preparation method thereof. The molecular bottle brush type reverse phase adsorbing material is obtained by taking hydroxyethyl methacrylate containing an ethylenic bond and styrene as monomers and sequentially polymerizing on the surface of dopamine-coated magnetic graphene through an atom transfer radical polymerization (ATRP) method. A separating material disclosed by the invention has the characteristics of high adsorption capacity and long service life, and can be used for enriching and quantitatively analyzing bisphenol A in environmental water, so that the separating and enriching efficiency of the bisphenol A can be greatly improved.

The invention discloses a method used for preparing lithium ion battery positive pole material fluophosphate vanadium lithium. The method is characterized in that a normal temperature reduction-heat treating method is adopted to prepare a lithium ion battery positive pole material LiVPO4F; the method comprises the following steps: mixing a lithium source, a vanadium source, a fluorine source and a phosphorus source according to the mol ratio of a lithium element, a vanadium element, a fluorine element, and a phosphorus element of 1:1:1:1, adding a reducer, wherein the dosage of the reducer is 1-5 times of that of the theory dosage; carrying out mechanical activation for 0.5-20 hours under the normal temperature condition, and reducing a high-price vanadium to a trivalence vanadium so as to prepare tiny amorphism LiVPO4F of small grains; and heating to 600-800 DEG C in non-oxidizing atmosphere and keeping constant temperature for 0.5-20 hours, thereby obtaining the positive pole material fluophosphate vanadium lithium. The electrochemistry performance of the prepared fluophosphate vanadium lithium is excellent. The fluophosphate vanadium lithium provided by the invention has the advantages of short flow, simple process, lower energy consumption and small production cost, and is easy to realize large scale production and the like.

The present invention relates to a composite Al2O3-SiO2-TiO2 oxide and a loading type hydrogenation-dearomatization catalyst which is obtained with the composite oxide as a support. The composite oxide support is the composite Al2O3-SiO2-TiO2 oxide which is obtained by assembling and synthesizing an aluminium source, a silicon source and a titanium source by a sol-gel method, the specific surface area of the composite Al2O3-SiO2-TiO2 oxide is 250 to 400m<2>/g, the pore volume is 0.4 to 0.6cm<3>/g, and the aperture is 4 to 10nm. The composite oxide is used as the support to load noble metal and becomes deep hydrogenation-dearomatization catalyst to be used for the hydrogenation-dearomatization treatment of oil, and particularly, the composite oxide shows the stability and the dearomatization activity better than the normal catalyst in the deep hydrogenation-dearomatization reaction of diesel oil.

The invention discloses a preparation method of a FeS2 film. The method comprises the following steps: using FTO conductive glass as a base; configuring a seed layer solution; soaking the base into the seed layer solution to coat in a pulling manner at room temperature; forming a layer of even ZnO nanocrystalline seed on the surface of the base; preparing a precursor solution; forming an even and compact ZnO nano rod array film on the surface of the base; covering the surface of the base with a Fe(OH)3 nano rod array by the ZnO nano rod array film at room temperature; carrying out vulcanizing treatment, and converting the Fe(OH)3 nano rod array into an FeS2 nano rod array. The FeS2 film comprises the base made of the FTO conductive glass; the base is covered with the FeS2 nano rod array; each FeS2 nano rod is formed by stacking FeS2 nano particles. The FeS2 film has the advantages that the optical absorption properties and the photoelectric conversion efficiency are improved by increasing the effective optical absorption area of a ferrous disulfide film.

The invention belongs to the technical field of preparation of lanthanum ferrite composite oxide materials, and particularly discloses a preparation method of an A-site magnesium-calcium double-dopedlanthanum ferrite composite oxide material. The preparation method comprises the following steps of adding La(NO3)3.6H2O (lanthanum nitrate), Fe(NO3)3.9H2O (ferric nitrate), Mg(NO3)2.6H2O (magnesium nitrate) and Ca(NO3)2.4H2O (calcium nitrate) into a prepared citric acid solution; then, adding ammonium hydroxide, treating in a water bath, drying, and calcining, so as to obtain the composite oxidematerial. The preparation method has the advantages that the Mg<2+> ion and Ca<2+> ion double-doped La0.85Mg0.15-xCaxFeO3 nanoparticle is synthesized by an accurate, controllable and easy nitrate saltsol-gel method at low temperature; the obtained samples has a single phase, and is of an orthorhombic crystal system structure, the space group is Pnma, Mg<2+> and Ca<2+> are used for replacing La<3+>, and the growth of particles is inhibited; the A-site magnesium-calcium double-doped lanthanum ferrite composite oxide material has wide application prospect in fields of electricity, magnetic sensors, industrial catalyzing, gas-sensitive material, information storage, spin-electron devices, and the like.

The invention discloses a dynamic polymer. The dynamic polymer comprises a cyclic organoborate bond produced by a reaction of an organoboric acid element with a monohydroxy element, and an optional supramolecular hydrogen bond, wherein the cyclic organoborate bond exists as a polymeric chain joint and/or cross-linked chain joint for the dynamic polymer and is a necessary condition for the formation or maintenance of the structure of the dynamic polymer. Due to the dynamic reversibility of the cyclic organoborate bond and the optional supramolecular hydrogen bond, the dynamic polymer has self-repairing performance, reusability and recyclability; moreover, the dynamic polymer prepared according to a specific formula has the characteristics of energy dissipation and energy absorption and thefunctions of damping, shock absorption, sound insulation, impact resistance, high toughness and the like based on the dynamic nature of the organoborate bond when the dynamic polymer receives an external force. The dynamic polymer or a composition thereof can be extensively used as an anti-impact damping material, a self-repairing material, a tough material, a force sensor, a sealing material, a sandwich adhesive and the like.

The invention relates to a method for preparing a composite catalyst for decomposing ozone. The method comprises the following steps: separately dissolving permanganate, an Mn<II> salt and a Cu<II> salt, so as to obtain three kinds of salt solutions; rapidly mixing the three kinds of salt solutions, stirring, carrying out an oxidation-reduction reaction, and then, carrying out filtrating and washing, so as to obtain filtrated residue of a composite oxide; adding the filtrated residue into water, carrying out mixing so as to form a suspension of the filtrated residue and the water, carrying out extra-fine grinding treatment on the suspension so as to thoroughly grind the suspension, and then, carrying out a freeze-drying process, thereby obtaining the composite catalyst for decomposing the ozone. According to the method provided by the invention, the number of synthesis steps is small, the synthesis conditions are simple, the process of extra-fine grinding treatment is simple, the dispersion effect is good, and various substances in the prepared composite catalyst are thoroughly mixed and doped, so that the catalysis effect is improved remarkably.

The invention discloses a method for synthesizing titanate series electronic ceramic nano-crystalline materials, which is suitable for preparing the nano-crystalline materials of barium titanate, strontium titanate, calcium titanate series or the like. In the method, composite molten caustic soda of sodium hydroxide and potassium hydroxide is used as a reaction fluxing agent, and the reactants are cheap and readily available soluble inorganic metal salt and metatitanic acid substance; The method comprises the following steps of: performing high-energy ball milling and activation pretreatment on the reactants without harsh reaction conditions of high temperature, high pressure and the like or complex process control steps such as pH value adjustment, roasting control and the like; and performing chemical reaction under normal pressure and at the temperature of 180+/-10 DEG C to synthesize the material. The method has the advantages of few controllable parameters in the synthesis process, simple process, low synthesis cost and suitability for scale production. The obtained titanate product has well-defined crystals and uniform size, is nano-scale and is suitable for researching the intrinsic performance and bringing the function of the nano-crystalline material into play to the greatest extent. The method promotes the domestic independent research and development level of the electronic ceramic material and provides a basis for the domestication of high-purity super-fine titanate high-end products.

The invention relates to a perovskite type photocatalyst, and specifically discloses a preparation method and applications of a calcium-doped LaNiO3 perovskite type photocatalyst. The preparation method comprises: adding water to lanthanum nitrate and nickel nitrate, completely dissolving, adding fully dissolved nickel nitrate, adding an ammonia water solution in a dropwise manner under stirring conditions, adjusting the pH value of the solution to 9-12, generating a precipitate, filtering the product, washing, drying, and roasting, wherein a molar ratio of the calcium ions to the lanthanum ions is 0.1-0.5. The invention further discloses applications of the calcium-doped LaNiO3 perovskite type photocatalyst in degradation of methyl orange in printing and dyeing wastewater. According to the present invention, the preparation method has characteristics of simple synthesis conditions and low secondary pollution, and the obtained calcium-doped LaNiO3 perovskite type photocatalyst has goodcatalytic effect, wherein the degradation effect reaches 95.01%.

The invention relates to a method for preparing a transition metal oxide positive electrode material of lithium. The method is a metal-organic coordination polymer precursor method, and the transition metal oxide of lithium can be prepared by performing thermal treatment and high-temperature calcination to the metal-organic coordination polymer. The transition metal oxide of the lithium prepared by using the method is good in crystal form, has nanoscale, special morphology and specific crystal orientation, and can show excellent electrochemical performance when being used as a positive electrode material of a lithium ion battery. The LiNi0.5Mn1.5O4 synthesized by using a method and having a spinel structure can achieve the specific capacity up to 117mAh/g when being used for discharging at 10 DEG C and 40 DEG C, and the specific capacity can be kept above 81.0% after being cyclized for 500 times. The specific capacity can achieve 105mAh/g after charging and discharging are carried out for 350 times according to 1C rate at 55 DEG C. In addition, the lithium-rich manganese-based positive electrode material 0.3Li2MnO3.0.7LiNi0.5Mn0.5O2 prepared by utilizing the method and having a laminar structure has reversible specific capacity. Two classes of materials are used as the positive electrode materials of the lithium ion battery with high specific energy and high specific power, and the method has wide application prospects.