44results about How to "Potential for industrial application" patented technology

The invention discloses a preparation method of a nitrogen-doped graphene supported iron-based catalyst. The preparation method comprises the following steps: Step I, preparing nitrogen-doped graphene; Step II, stirring and mixing the nitrogen-doped graphene prepared in Step I with a divalent iron salt solution, removing a solvent, and drying the mixture to obtain a divalent iron / nitrogen-doped graphene mixed material; Step III, under an inert atmosphere, pyrolyzing the divalent iron / nitrogen-doped graphene mixed material prepared in Step II at a high temperature to obtain the nitrogen-doped graphene supported iron-based catalyst, wherein the high-temperature pyrolysis is performed at 550 to 1,200 DEG C. The invention provides the preparation method of the nitrogen-doped graphene supportediron-based catalyst, and the prepared catalyst is extremely high in catalysis activity and selectivity in application to preparation of an aromatic amine compound through catalytic hydrogenation of an aromatic nitro compound.

The present invention relates to a method for preparing magnetic-induced discoloration polymeric fibers. The method comprises: adopting ferrocene, acetone, and hydrogen peroxide as starting raw materials; adopting a solvothermal method to prepare ferroferric oxide nanospheres; dispersing the ferroferric oxide nanospheres into an acetone solvent to obtain a dispersion liquid; uniformly mixing the dispersion liquid and polyethylene glycol diacrylate (PEGDA); evaporating the acetone solvent; adding an ultraviolet light initiator to obtain a polymer monomer emulsion (Fe3O4 / PEGDA); and placing polymer fibers in a magnetic field, and adopting an ultraviolet light polymerization method to polymerize the Fe3O4 / PEGDA on the surfaces of the polymer fibers to obtain the magnetic-induced discoloration polymeric fibers. The structural color fibers prepared by the method of the present invention have excellent optical properties, and can be used for preparation of magnetic field regulated photonic crystal fibers, photonic crystal sensors, and the like. The method of the present invention has characteristics of simple operation, good effect, and no requirement of chemical dyes, and provides important reference values for reduction of environmental pollution on dyeing and finishing industry.

The invention belongs to the field of lithium-ion battery materials and discloses a nitrogen-doped hollow carbon sphere composite and a preparation method and application thereof. Manganese acetate and ammonium bicarbonate are dissolved in ethylene glycol, solvothermal reaction is carried out at 180-220 DEG C to obtain manganese carbonate; the manganese carbonate is subjected to reaction with dopamine hydrochloride to obtain manganese carbonate / polydopamine composite; the manganese carbonate / polydopamine composite is calcined in an inert atmosphere to obtain nitrogen-doped carbon-coated manganese oxide composite; the nitrogen-doped carbon-coated manganese oxide composite is treated with an acid solution; washing and drying are performed to obtain the nitrogen-doped hollow carbon sphere composite. The preparation method herein is simple, low in cost and environmentally friendly. The prepared nitrogen-doped hollow carbon sphere composite has stable structure and good conductivity and hasexcellent cycle stability when acting as a lithium-ion battery anode material.

The invention belongs to the technical field of visible light curing, and particularly relates to a visible light initiating system capable of initiating free radical / cation polymerization. The system comprises the following components in parts by weight: 0.5-1 part of an integral photosensitizer as a first component, 0.5-1 part of a coinitiator as a second component and 1-3 parts of a photosensitive synergist as a third component, wherein the formula of the integral photosensitizer is shown in the description; the coinitiator is one of fatty amine and aromatic amine derivative; the photosensitive synergist is one of iodonium salt, sulfonium salt and phosphonium salt. Compared with the common reported visible light initiating system, the visible light initiating system has the advantages that the light sensitive wave band is longer, the light absorption capability is stronger, the molecular structure is simple, the preparation is easy, the cost is low, and the visible light initiating system has good compatibility with hydrophobic light-cured resin, can effectively initiate free radical / cation photopolymerization, and has industrialized application potential.

The invention discloses a bacillus subtilis BAV20120416 bacterial strain and a method for fermentation production of a D- ribose by the bacterial strain. The bacterial strain is preserved in China General Microbiological Culture Collection Center (CGMCC) on April, 16th in 2012. The preservation number of the bacterial strain is CGMCC NO.6013. The bacterial strain is a bacillus subtilis transketolase deletion mutation strain, has the advantages that hereditary stability is good, spores are difficult to generate and the like, and is capable of accumulating more than 90g / L of the D-ribose in a fermentation medium with glucose and corn steep liquor as main raw materials. The D-ribose accumulated by the bacterial strain is about third more than that accumulated by a parent strain of the bacterial strain, wherein the parent strain is bacillus subtilis ATCC21360. The fermentation time is short and generally controlled to be about 50 hours which is one-third lower than the time in the prior art. Particularly, impurities are few. Residual sugar of final fermentation liquid is reduced to 0. The bacterial strain is particularly applicable to the requirements for medicine production.

The invention discloses a preparation method of a flexible large-area perovskite solar cell based on a roller coating process. The preparation method comprises the following steps of 1, processing a flexible conductive substrate; 2, sequentially preparing an electron transfer layer, a perovskite absorbing layer and a hole transport layer on the flexible conductive substrate by using the roller coating process or sequentially preparing a hole transport layer, a perovskite absorbing layer and an electron transfer layer on the flexible conductive substrate by using the roller coating process; 3,preparing a top electrode and a bottom electrode to prepare the perovskite solar cell. The preparation method can effectively solve the technical problems that the flexible substrate is easy to deform, the perovskite crystal quality is poor and the thickness is uneven by adjusting roller coating process parameters; the coating uniformity and flatness are improved, the preparation of the flexible perovskite solar cell, especially the large-area perovskite solar cell can be achieved, and application scenarios of the perovskite solar cell are expanded; the method is expected to achieve rapid, low-cost and roll-to-roll production of large-area perovskite cells on flexible substrates.

The invention relates to a method for increasing the content of grease and fatty acid in tribonema and belongs to the field of biotechnology and food engineering. The method is specifically the biological technology for increasing the content of grease in tribonema and influencing the composition of fatty acid by adding certain bacteria to a culturing system. The prepared oil-enriched microalga can be used as a raw material for production of vegetable fat and development of polyunsaturated fatty acid feed additives.

The invention discloses a double-donor aromatic amine photosensitizer, structurally characterized by having an aromatic amine double-donor conjugated group and a structurally general formula shown as I. Compared with commonly reported visible light initiating systems, this photosensitizer has high absorbability in a visible light area, is simple to synthesize, is applicable to visible LED light source free radicals and cationic curing systems and has application potential.

The invention discloses a method for preparing 2-amino-4(3H)-quinazolinones. Specifically, a bimetallic cationic complex [Ln(CH3CHN)9]<3+>[(AlCl4)3]<3->.CH3CN is taken as a catalyst, a methyl 2-aminobenzoate compound and a carbodiimide compound are catalyzed for preparation of 2-amino-4(3H)-quinazolinones, wherein Ln represents a positive trivalent rare earth metal ion and is one selected from lanthanum, neodymium, samarium, gadolinium, erbium and ytterbium, CH3CN represents acetonitrile, and the chemical structural general formula of methyl 2-aminobenzoates and the general formula of carbodiimides are both shown in the description. The bimetallic cationic catalyst disclosed by the invention has high activity and has universality for multiple methyl 2-aminobenzoates and carbodiimides; the preparation method is short in reaction time, mild in reaction conditions, high in target product yield, and simple and controllable in preparation process, and has industrialization application potential.

The invention discloses a synthetic method of a sulfonic acid inner salt compound of amidine. According to the synthetic method, an o-amino benzene sulfonyl chloride compound and amide are adopted as reactants, and stirring reaction is carried out to compound and obtain the product, namely, sulfonic acid inner salt of amidine. The synthetic method disclosed by the invention is easy to operate, mild in reaction condition, and relatively good in yield, has universality for various amide, needs no reaction solvent, and causes little environmental pollution; the adopted raw materials are wide in resources and easy to get; the synthetic process is simple, controllable, and high in actual operability; the reaction is good in atom economy; the only by-product is hydrogen chloride gas which is easy to absorb or recycle; the synthetic method is suitable for large, medium and small scale synthesis, and has a potential for industrial application.

The invention discloses a production method for 3-aminoisobutyric acid. A 3-aminoisobutyric acid producing strain is constructed through the following steps: A, knocking out the ptsG, fumAC and fumB genes in the MG1655 genome of Escherichia coli so as to obtain the gene knockout strain MG1655 (delta<ptsG>delta<fumAC>delta<fumB>); B, constructing of expression plasmids expressing the genes panD, aspA and C24MTgm; and C, transforming the plasmids obtained in the step B into the gene knockout strain MG1655 (delta<ptsG>delta<fumAC>delta<fumB>) obtained in the step A so as to obtain a genetically-engineered strain. The Escherichia coli engineered strain constructed in the invention can produce 3-aminoisobutyric acid, and the yield of aminoisobutyric acid produced through shake flask fermentation is as high as 100 mg / L.

The invention belongs to the technical field of preparation of micro-nanometer materials, and particularly relates to a one-step method for preparing one-dimensional Sb203 micro-nanometer powder and composite-morphological Sb203 micro-nanometer powder. Liquor with SbCl3 soluble in ethanol is added into alkali liquor to realize reaction, and one-dimensional Sb203 micro-nanometer powder and composite-morphological Sb203 micro-nanometer powder are obtained by means of filtering and drying. The method is simple, time-saving and labor-saving, is low in cost and environmental pollution, and saves energy, optional additives are omitted in a preparation procedure, and the one-step method has high industrial application potential.

The invention provides a large-area high-quality graphene lossless transfer method based on doping layer assistance, and relates to the technical field of application of two-dimensional materials. Thelarge-area high-quality graphene lossless transfer method comprises: growth of a single-layer graphene film, generation of a doping layer, attachment of a supporting layer, removal of a catalytic metal substrate and transfer of the graphene film. According to the invention, the doped material is used as the protective layer and the doped layer of graphene transfer, so that the problems of graphene material contamination, film damage, poor electrical properties and the like in the existing graphene transfer technology are solved, and the operation can be repeated to prepare the layer-by-layerdoped large-area high-quality multilayer graphene film through transfer; and with the method, it is guaranteed that the graphene film released to the target substrate has continuous surface morphologyand a complete two-dimensional structure while the work function and the conductivity of graphene are improved.

The invention discloses a saccharomyces cerevisiae genetic engineering strain for achieving high yield of pyruvic acid. The strain is classified and named as saccharomyces cerevisiae XY-156A and preserved in the China General Microbiological Culture Collection Center, and the preservation number of the strain is CCTCC M 2019129. The saccharomyces cerevisiae genetic engineering strain XY-156A can utilize a large amount of glucose for fermentation production of the pyruvic acid, fed-batch fermentation is conducted for 76 hours, the concentration of the pyruvic acid in fermentation liquid can reach 105 g / L, for the yield of the pyruvic acid, 0.5 gram of the pyruvic acid is obtained through per gram of the glucose, and the strain has potential application value in fermentation production of the pyruvic acid.

The invention discloses a method for preparing carbon nanotube / glass fiber nano-micron compound powder. Pretreated glass fiber is added to an alcohol and water mixed solution of TEOS, KH550, acidified carbon nanotubes and acid or alkali at the temperature of 50-85 DEG C to have a hydrolysis and coating reaction, a product is filtered and dried, and the glass fiber based nano-micron powder is prepared. Surfaces of prepared glass fiber samples are coarse remarkably due to the fact that the carbon nanotubes are attached to the surfaces of the glass fiber through poly-silicon serving as an adhesion substrate. The samples integrate performance of the glass fiber and performance of the carbon nanotubes and are taken as filler to be added to a polymer composite material, the mechanical performance of the material is expected to be improved remarkably, and the polymer material has an antistatic property, an antibacterial property and the like. The yield of the prepared samples is large, the process is simple, the cost is low, and the method has industrial application potential and is expected to be used for preparation and industrial research of other kinds of micro-nano materials.

The invention discloses a method for directly preparing xylitol from hemicellulose. The preparation method comprises the following steps: mixing biomass hemicellulose, a magnetic solid acid catalyst and deionized water, carrying out a sealed reaction at 170-200 DEG C for 1-5 hours in a hydrogen atmosphere of 1-4 MPa and at a stirring rate of 500-700 rpm, and conducting cooling to room temperatureto obtain the xylitol. After being magnetically separated and dried, the magnetic solid acid catalyst is used for a next reaction. The yield of the xylitol is high, and byproducts and excessive hydrogenolysis products cannot appear in the hydrolysis and hydrogenation processes with the used magnetic solid acid catalyst.

The invention discloses an electrochemical method for preparing a high-purity molybdenum disulfide nanosheet from molybdenite. The purity of the obtained molybdenum disulfide nanosheet reaches 99.0% or above, and the average thickness of the nanosheet is only 10-30 nm. The method comprises the following preparation steps: (1) putting alkali metal chlorate into a nickel reaction container, melting at high temperature, and then reducing the temperature of molten salt to a reaction temperature; (2) adding molybdenite into a nickel container and immersing themolybdenite in molten salt by taking the nickel container as a cathode and the molten salt as electrolyte, and mounting an anode for electrolysis; and (3) after the electrolysis is finished, taking out the anode, cooling to room temperature in an inert atmosphere, collecting anode surface sediments, and washing and drying to obtain the high-purity molybdenum disulfide powder. The method is simple to operate, clean in process and low in preparation cost; and the obtained molybdenum disulfide nanosheet is stable in property, and shows relatively high lithium storage performance and electrochemical stability when being used as a lithium ion battery negative electrode material.

The invention provides a method for activating waste rock wool and application of activated waste rock wool. Wherein the waste rock wool is activated in the mode that the waste rock wool is immersed in high-temperature chlorate molten salt, so that the content of active silicon oxide and aluminum oxide in the waste rock wool is increased, and organic matter in the waste rock wool is removed; meanwhile, the silicon oxide component in the waste rock wool can react with the fused chlorate to generate silicate with high pozzolanic activity. The activated waste rock wool prepared by the method has the characteristic of high pozzolanic activity, can be used as a cementing material admixture for preparing a cementing material, and is used for sludge solidification treatment. The waste rock wool treatment method provided by the invention is short in flow and simple in technological process, and does not cause pollution to the environment; fused salt can be repeatedly used, so that the cost is reduced; in addition, the cementing material prepared from the activated waste rock wool is used for sludge solidification treatment, the utilization rate of resources is increased, the sludge treatment cost is reduced, and industrial application potential is achieved.

The invention discloses preparation of a carbon nanotube / polyaniline / polysulfone conductive ultrafiltration membrane and a membrane pollution online monitoring technology. With polysulfone as a film-forming material, and carbon nanotubes and polyaniline nanofibers as fillers, the carbon nanotube / polyaniline / polysulfone conductive ultrafiltration membrane is prepared by a blending method and immersion phase transformation. A polysulfone membrane itself is non-conductive, so with the addition of conductive material carbon nanotubes and polyaniline, not only are the flux, hydrophilicity, mechanical strength and other properties of the membrane improved, but also the electrical conductivity of the membrane is improved. The change of the membrane flux is reflected through the change of the membrane resistance, and a membrane pollution condition can be monitored in real time. The preparation method and process flow of the conductive ultrafiltration membrane are simple and easy to operate andlow in cost; the prepared membrane has excellent performance, the real-time monitoring method of the membrane pollution is sensitive and simple, the service life of the membrane is prolonged, and themembrane can be used in the industrial fields such as sewage treatment, protein separation and the like.

The invention discloses a lithium ion battery negative electrode composite material and a preparation method thereof. The composite material is characterized in that a plurality of spherical nanoscale red phosphorus@carbon primary particles are superposed and combined into micron-sized spherical secondary particles, and the nanoscale red phosphorus@carbon primary particles are porous carbon layers uniformly coated on the surfaces of mesoporous nanoscale red phosphorus particles. The preparation method comprises the steps of uniformly mixing commercial red phosphorus, organic amine and an alcohol additive, and reacting under certain process conditions to obtain mesoporous nano red phosphorus particles; mixing the mesoporous nano red phosphorus, an organic carbon source and a carbonizer, and carrying out high-speed shearing emulsification to prepare an emulsion; and carrying out spray drying treatment on the emulsion, putting the emulsion into a closed quartz tube filled with inert gas, and carrying out low-temperature roasting treatment to obtain the composite material. The composite material has the advantages that the pore structure of the composite material can effectively buffer volume expansion of red phosphorus, avoid pulverization of an electrode material and increase the contact area of the red phosphorus, a conductive material and an electrolyte, the composite material has relatively high red phosphorus content and tap density, and the energy density of the battery is improved.

The invention discloses heat storage equipment for absorbing heat energy of molten calcium carbide by binary salt. The heat storage equipment comprises a heat preservation shell, a salt storage tank is embedded in the heat preservation shell, and a thick-wall rotating sleeve, a spiral water pipe and a first spiral blade are arranged on a lower cylinder of the salt storage tank. The thick-wall rotating sleeve sleeves a driven gear I, the driven gear I is meshed with a driving gear, and the driving gear, a wind wheel bin and turbofan blades are coaxially arranged. The spiral water pipe communicates with the heat preservation shell and the water storage tank. A molten liquid feeding cylinder is internally tangent to the upper cylinder of the salt storage tank, the molten liquid feeding cylinder is provided with a second shaft and a second spiral blade. According to the heat storage equipment for absorbing the heat energy of the molten calcium carbide by the binary salt, the binary salt isadopted to absorb the heat energy of the molten calcium carbide for the first time, the heat preservation shell and the salt storage tank of special structures are designed, the stirring, water lifting and conveying and water heat exchange preheating processes of the binary salt can be achieved through a screw extrusion lifting structure and an Archimedes water pump lifting structure, and calciumcarbide liquid is lifted and stirred in an enhanced mode through the screw extrusion lifting structure; and the heat storage equipment for absorbing the heat energy of the molten calcium carbide by the binary salt is high in heat exchange efficiency, free of plug-in, low in energy consumption and capable of avoiding binary salt caking and saving maintenance cost.

The invention belongs to the technical field of biomass energy utilization, and particularly relates to a red mud-based catalyst for synthesizing low-carbon alcohol as well as preparation and application of the red mud-based catalyst. The catalyst takes red mud as a carrier, an active component is Cu, and an auxiliary agent is one or more of Rh, Mo, Zr, La, Ce, Mn, Co and Cr. The mass content of the active component in the catalyst is 10-80%, the mass content of the auxiliary agent is 10-50%, and the balance is the carrier. The catalyst is prepared by taking the red mud as the carrier and is applied to the reaction for preparing the low-carbon alcohol from the biomass synthesis gas, so that the utilization rate of biomass resources is increased, the problems of high catalyst cost, low CO conversion rate and low C2 + alcohol selectivity in the reaction for preparing the low-carbon alcohol from the synthesis gas in the prior art are solved, and the catalyst has industrial application potential.

The invention discloses a method for synthesizing an amidine sulfonic acid inner salt compound. An anthranilyl chloride compound and an amide are used as reactants, and a stirring reaction is performed to obtain a product amidine sulfonic acid inner salt. The synthesis method disclosed by the invention is simple to operate, has mild reaction conditions, good yield, and is universal to various amides; no reaction solvent is needed, and the environmental pollution is small; the raw materials used are widely sourced and easy to obtain; the synthesis process is simple and controllable, practical The operability is strong; the atomic economy of the reaction is good, and the only by-product is hydrogen chloride gas, which is easy to absorb or recycle; it is suitable for large, medium and small-scale synthesis, and has the potential for industrial application.

The invention discloses a method for directly preparing xylitol from hemicellulose, comprising: after mixing biomass hemicellulose, a magnetic solid acid catalyst and deionized water, under a hydrogen atmosphere of 1-4MPa and 500-700rpm Under the agitation rate of 170-200°C, carry out closed reaction for 1-5h, and then cool to room temperature to obtain the xylitol; the above-mentioned magnetic solid acid catalyst is used for the next reaction after magnetic separation and drying. The yield of the xylitol of the invention is high, and the magnetic solid acid catalyst used will not produce by-products and excessive hydrogenolysis products in the process of hydrolysis and hydrogenation.