34results about How to "Low requirements for experimental equipment" patented technology

The invention belongs to the field of chemical engineering and catalyst preparation and relates to a catalyst for catalyzing a methane dry-reforming reaction as well as a preparation method and an application of the catalyst. The catalyst for catalyzing the methane dry-reforming reaction adopts oxide as a carrier C to carry metals A and B with an impregnation method and a redox replacement method, and a B-A / C catalyst is obtained. The invention further provides the preparation method and the application of the catalyst for catalyzing the methane dry-reforming reaction. The B-A / C catalyst performs reforming catalysis for CH4 and CO2 in a gas phase, and synthesis gas of H2 and CO is produced. The B-A / C catalyst prepared with the impregnation-replacement method shows an obvious effect on catalysis of the methane dry-reforming reaction, the obtained H2 / CO content is higher than 80%, and the yield of hydrocarbon in a follow-up Fischer-Tropsch reaction is increased; the conversion rate of a reactant is increased and the stability of the catalyst is enhanced.

The invention provides a bismuth ferrite nano-cylinder and a preparation method thereof. Bismuth nitrate and ferric nitrate are taken as raw materials, and the shape of the prepared bismuth ferrite nano-cylinder is controlled by regulating hydrothermal conditions such as key parameters of sodium hydroxide concentration, reaction temperature and time through a hydrothermal method. The bismuth ferrite nano-cylinder prepared through the simple hydrothermal method is 400-800 nanometers in diameter, and 100-400 nanometers in thickness. Compared with the prior art, the preparation method of the bismuth ferrite nano-cylinder provided by the invention is free from pollution, low in cost, simple in production process and easy for industrial production. The synthesized bismuth ferrite nano-cylinder has wide application prospects in the fields of information storage, sensors and microelectronics.

The invention relates to flake silver powder as well as a preparation method and application thereof.The preparation method comprises the following steps that S1, a silver source is dissolved in deionized water to prepare a solution containing silver ions, a reducing agent is dissolved in the deionized water to obtain a reducing agent solution, and the concentration range of the silver ions in thesolution containing the silver ions is 0.22 mol / L; S2, a pH regulating solution is prepared, the pH regulating solution is added into the solution containing the silver ions, and the pH value of thesolution is regulated to 8-12; S3, a dispersing agent is added into the solution containing the silver ions, and uniform stirring is carried out; S4, at the temperature of 20-60 DEG C, the solution containing the silver ions and the reducing agent solution are fully mixed and reduced in the stirring process to obtain silver particles, part of the reducing agent solution is added into part of the solution containing the silver ions in the mixing process, and after full reduction stirring, the remaining reducing agent solution and the solution containing the silver ions are added into a system at the same time; and continuous stirring and reduction are carried out until the reaction is finished, solid-liquid separation is carried out on the reaction liquid, washing and drying are carried outto obtain the flake silver powder. According to the preparation method, the particle size and the sheet diameter of the prepared silver powder are regulated and controlled, operation is easy, and different use requirements can be met.

The invention relates to a copper-nickel alloy nanowire / titanium dioxide composite material as well as a preparation method and application thereof. The copper-nickel alloy nanowire / titanium dioxide composite material comprises copper-nickel alloy nanowires and titanium dioxide granules which are grown on surfaces of the copper-nickel alloy nanowires in situ. The titanium dioxide granules are grown on the surfaces of the copper-nickel alloy nanowires by using a wet chemical method, so that the copper-nickel alloy nanowire / titanium dioxide composite material can be prepared, and the purposes that VOCs are effectively degraded and thus air is purified can be achieved when the copper-nickel alloy nanowire / titanium dioxide composite material is applied to photocatalytic acetaldehyde degradation under visible light.

The invention belongs to the technical field of phase change materials, and particularly discloses an organic phase change fluid material and a preparation method and application thereof. The method specifically comprises the following steps: (1) mixing an emulsifier, a nucleating agent, water and glycerol, adding nanoscale aluminum nitride and molybdenum disulfide, and performing uniform mixing to obtain a turbid solution; and (2) uniformly mixing the turbid solution obtained in the step (1) with a phase change material to obtain a fatty acid ester water-based emulsion, and cooling the fattyacid ester water-based emulsion to room temperature to obtain the fluid phase change material. The novel fluid phase-change material prepared by the invention is an emulsion, and since ester is used as the phase-change material, the latent heat of phase change is higher than that of other organic phase-change materials, the stability is better, the heat conductivity is higher, and the heat conductivity coefficient is 0.3-1.4W / m / DEG C. The preparation process is simple, has low requirements on experimental apparatuses, is easy to control and can be widely applied to the field of heat storage and transfer.

The invention provides a method for regulating and controlling the particle size of silicon dioxide microspheres. The method comprises the following steps that an ammonium chloride aqueous solution and a tetraethoxysilane ethanol solution with different concentrations are mixed, the pH value of the solution is regulated and controlled through triethylene tetramine, at the normal-temperature and normal-pressure conditions, a submicron-order and micron-sized silicon dioxide sphere precursor with adjustable particle size is successfully synthesized, an obtained drying sample is placed in a mufflefurnace, calcining is carried out for 2-6 hours at the temperature of 500-800 DEG C, and cooling is carried out to reach the room temperature so as to obtain silicon dioxide with different sphericaldiameters. The regulation and control method has the advantages that a required device is simple, the operation is simple and easy, the efficiency is high, and accurate control over the size of the product can be realized; and the particle size of the silicon dioxide microspheres prepared through the method ranges from 200 nm to 2 microns, the synthetic path is simple, the cost is low, the application is wide, and the like.

The invention discloses a primer for loop-mediated isothermal amplification for Brucella and a detection reaction system. Four LAMP specific primers are designed for a conservative OMP25 protein gene of Brucella, and an LAMP quick detection method of Brucella is established by optimizing the reaction condition. Specificity and sensitivity test results show that the method can specifically detect Brucella, wherein the minimum limit of detection is 5 copies / microlitre. The amplification product can be judged through agarose gel electrophoresis and chromogenic reaction. LAMP can quickly, intuitively and accurately detect Brucella, and is a detection method suitable for field application of basic level.

The invention relates to an LAMP detection method of utilizing mitochondrial DNA to identify cat meat in beef and mutton and belongs to the technical field of molecular biological detection. The LAMP detection method includes: taking DNA of a to-be-detected meat product as a template, and taking MF3, MB3, MFIP and MBIP as primers to build an LAMP detection system; enabling the LAMP detection system to be in LAMP reaction in water bath at constant temperature of 64 DEG C for 40min, and adding 1uL of fluorescent dye SYBR GREENI into reaction liquid after the reaction is finished; if the reaction liquid becomes green, determining that the to-be-detected meat product contains cat meat; if the reaction liquid becomes orange, determining that the to-be-detected meat product does not contain cat meat. Compared with conventional PCR, the LAMP detection method has the advantages that detection can be completed through reaction in a common constant-temperature water bath for 40min, and results can be directly observed by naked eyes by adding the dye into a final product, so that animal-based ingredients can be identified quickly and accurately; the LAMP detection method is simple and convenient in operation, low in requirement on experimental instruments and easy in result determination.

The invention discloses a graphite carbon / ferroferric oxide composite and a preparation method and application thereof. The composite is spherical particles of a core-shell structure, and in the spherical particles of the core-shell structure, ferroferric oxide particles are adopted as cores, and graphite carbon is adopted as shells. The preparation method comprises the following steps that, 1, ferrous gluconate and Pluronic F127 are added to deionized water to be mixed, and a solution I is obtained; 2, polyetherimide is added to the solution I to be mixed evenly, a solution II is obtained, and the solution II is dried to obtain solid powder; 3, in the inert atmosphere, the solid powder is annealed, and the graphite carbon / ferroferric oxide composite is obtained. The preparation process is simple and convenient, operation is easy, the preparation period is short, the requirement for experiment equipment is low, the graphite carbon / ferroferric oxide composite is suitable for volume production, and the prepared graphite carbon / ferroferric oxide composite has excellent electrochemical performance and can be used for lithium ion battery anode materials.

The invention discloses an RT-LAMP detection kit and a detection method of infectious myonecrosis viruses, wherein the kit consists of a mixed solution of outer primers F3 and B3 and inner primers FIP and BIP; and nucleotide sequences of the primers F3, B3, FIP and BIP are separately shown as SEQ ID NO.1, SEQ ID NO.2, SEQ ID NO.3 and SEQ ID NO.4. According to the detection method, an RT-LAMP detection system is used for detecting whether a sample contains the infectious myonecrosis viruses or not. The method is simple and convenient to operate and is relatively low in requirement on experimental instruments, and the method can be completed in a normal constant-temperature water bath kettle within 60min; moreover, by virtue of a method of adding a dye to a final product and by directly observing a result with naked eyes, the method can rapidly and accurately identify the infectious myonecrosis viruses; and the method has a broad popularization and application prospect in prawn aquaculture.

The invention discloses a method and device for preparing a thin film through electrostatic gas spraying and thermocuring. The device comprises a moving support platform, an electrostatic atomizationauxiliary system and a liquid supply system. The moving support platform comprises a base platform, a supporting frame, a cross beam, a ring electrode adjusting mechanism and a lifting table. The electrostatic atomization auxiliary system comprises a high-voltage electrostatic generator, an electric heating plate, a metal receiving plate, a ring electrode, an electrostatic gas spraying device, a gas conveying pipe, an electrode wire and a gas pump. The liquid supply system comprises thermocuring electrostatic mixed liquid, a liquid storage tank, a peristaltic pump and a liquid conveying pipe.According to the method and device, high-voltage electrostatic assistance is added on the premise of gas spraying, and the efficiency of preparing the thin film is improved by greatly increasing the liquid flow; and meanwhile, the method is easy to operate, the requirement for equipment is low, and the cost of preparing the thin film is reduced.

The invention discloses a fluorine-doped ammonium tungsten bronze photocatalyst with full-spectrum response, and a preparation method thereof. The method comprises: adding tungsten chloride and ammonium acetate into an n-propanol solution, and ultrasonically dissolving to obtain a solution A; adding a hydrofluoric acid solution into the solution A to obtain a solution B, and reacting at 180-220 DEG C for 12-72 h; and naturally cooling the reaction product, washing, and drying to obtain the fluorine-doped ammonium tungsten bronze photocatalyst with full-spectrum response. According to the invention, the rhodamine B degradation rate of the catalyst is greater than 35% after ultraviolet light irradiation for 180 min, the rhodamine B degradation rate of the catalyst is greater than 90% after visible light irradiation for 120 min, the rhodamine B degradation rate of the catalyst is greater than 80% after near-infrared light irradiation for 180 min, and the photocatalyst still has high degradation rate and stable activity after a photocatalysis experiment is cycled five times, and can be stably used for a long time; and the method is simple to operate, wide in raw material source, low incost and high in pollutant degradation rate.

The invention discloses a method for synthesizing copper nanowire gel by a one-pot method. For a long term, the research on a negative electrode of a traditional lithium battery industry mostly concentrates on a negative electrode material, but the research on a copper foil which is related to the negative electrode material and is used as a negative material current collector is quite scarce. The negative electrode copper foil of a traditional lithium battery only has one function of serving as the current collector, and is slightly inadequate in space of the battery and cost, therefore, the copper foil is enabled to have double functions by using the point, i.e., a new innovation of the copper foil for serving as the current collector and participating in lithium battery reaction like the negative electrode material is realized. The invention relates to a copper nanowire elementary substance; the copper nanowire elementary substance is prepared into the copper foil by using a sheet pressing machine, thus obtaining a negative electrode current collector of a lithium battery; by a performance test of the lithium battery, the material is found to remarkably enhance the capacity of the lithium battery; the first-time charge and discharge capacity reaches 1800mAhg<-1>; besides, the stability is more excellent; the copper foil has significant advantage in comprehensive performance compared with that of a commercial copper foil serving as the negative electrode current collector of the lithium battery.

The invention discloses a full-oxide lead-free ferroelectric photovoltaic device with a sandwich structure and a preparation method thereof. The photovoltaic device comprises a substrate, wherein thesubstrate is covered with a BFO layer, the BFO layer is covered with an ITO layer, and the BFO layer is a BiFeO3-delta film which grows in an epitaxial mode. The photovoltaic device is advantaged in that oxygen vacancy doping is ingeniously utilized to increase light absorption efficiency of a ferroelectric layer, and the built-in potential caused by the work function difference between the upperelectrode and the lower electrode is utilized to cooperate with the ferroelectric depolarization field, and thereby separation of photo-induced electron hole pairs is effectively promoted, and photoelectric conversion performance of the device is improved.

The invention discloses a choroidal neovascularization targeting nanoparticle coated with a macrophage membrane and a preparation method of the choroidal neovascularization targeting nanoparticle. A polylactic acid-glycolic acid copolymer entraps rapamycin to prepare rapamycin-PLGA nanoparticles, the rapamycin-PLGA nanoparticles are used as an inner core, and a macrophage membrane is used as a capsid to coat the surface of the rapamycin-PLGA nanoparticles; wherein the mass ratio of the rapamycin to the polylactic acid-glycolic acid copolymer is 1: (9-20), and the mass ratio of the protein in the macrophage membrane to the polylactic acid-glycolic acid copolymer is 1: (1-1.5). The prepared nanoparticles are good in biocompatibility, the preparation method is simple, and the particle size distribution of the nanoparticles is uniform. The key lesion of age-related macular degeneration, namely choroidal neovascularization, is actively targeted by using biomolecules on the surface of a macrophage membrane, so that the active recruitment of a drug-containing carrier to the neovascularization is effectively improved, and the effect of protecting retinal pigment epithelium under an inflammatory condition is also achieved while the neovascularization is inhibited.

The invention relates to the technical field of biomedicine, in particular to PF-127-miRNA-615 agomir complex and a preparation method and application thereof, wherein the PF-127-miRNA-615 agomir complex is made by covering miRNA-615 agomir with Pluronic F-127 hydrogel. A transporter capable of carrying miRNA-615 agomir and filling crack damage is provided, precise transport and local slow release of miRNA-615 agomir are achieved, and three-dimensional space and mechanical supporting capacity can be provided for the growth of neural axons. Therefore, the PF-127-miRNA-615 agomir complex can vigorously promote nerve regenerative repair for brachial plexus root avulsion, and new treatment routes are provided for central and peripheral nerve injury.

The invention discloses a full-oxide lead-free ferroelectric photovoltaic device with a sandwich structure and a preparation method thereof. The photovoltaic device comprises a substrate, wherein thesubstrate is covered with a BFO layer, the BFO layer is covered with an ITO layer, and the BFO layer is a BiFeO3-delta film which grows in an epitaxial mode. The photovoltaic device is advantaged in that oxygen vacancy doping is ingeniously utilized to increase light absorption efficiency of a ferroelectric layer, and the built-in potential caused by the work function difference between the upperelectrode and the lower electrode is utilized to cooperate with the ferroelectric depolarization field, and thereby separation of photo-induced electron hole pairs is effectively promoted, and photoelectric conversion performance of the device is improved.

The invention provides a biodegradable mesoporous nano magnetic material and a preparation method thereof. The present invention adopts the in-situ co-precipitation method, dissolves a certain amount of salt containing calcium, phosphate and carbonate in the aqueous solution, stirs at a constant temperature at a certain temperature, then adds a certain amount of soluble iron, cobalt, nickel and other salts, and continues the constant temperature Stir for 10s-120h, filter the product, wash with ethanol twice, dry in the air and then calcinate at 600-1200°C for 2-12h, place the product in a citric acid-sodium hydroxide buffer solution with a pH of 4.5-7.4, and continuously Stir for 30min-24h, wash the product twice with deionized water and twice with ethanol, and dry at 50-60°C to obtain a nano-mesoporous magnetic material containing nano-magnetic materials in the skeleton. The mesoporous nano-magnetic material synthesized by the method of the present invention can be used as a magnetic targeting material for directional killing of tumors and cancer tissues, and has biodegradability, can be gradually degraded and discharged in a living body, and avoids the nanoparticle in a living body accumulation enrichment.

The preparation method comprises the following steps: sawing and tenoning a log material, smearing a wood adhesive prepared by taking meta-kaolin as a geopolymer raw material, taking styrene-acrylic emulsion as doped modified resin and taking silane as a coupling agent, and carrying out post-treatment such as pressurizing and cementing to obtain the formaldehyde-free environment-friendly laminated wood. The adhesive layer shearing strength of the product can reach up to 4.9 MPa, the strength is high, the adhesive cost of the laminated wood is reduced, the environmental protection requirement of zero formaldehyde release is met, sustainable development is met, the product can be used as a furniture material, a floor, a wall decorative plate and the like, and the product has important significance on the artificial board industry and has high industrial value.

The invention relates to a preparation method of a nanocrystal superlattice material, which comprises the following steps: adding an inorganic salt (soluble carbonate or soluble sulfate) solution into a monodisperse nanocrystal aqueous solution (obtained by dispersing nanoparticles modified by nonionic water-soluble polymers into deionized water), so that the concentration of the inorganic salt in the solution is 1.0 M or above; uniformly mixing, and standing at room temperature for 10-20 minutes to obtain a disordered aggregate; and adding deionized water into the obtained disordered aggregate to enable the concentration of inorganic salt in the system to be 0.60-0.85 M, uniformly mixing, and standing at room temperature for 30-60 minutes to obtain the nanocrystalline superlattice material. According to the preparation method of the nanocrystalline superlattice material, the time for assembling the highly-ordered nanocrystalline superlattice from the monodispersed nanoparticles is short, the preparation efficiency of the nanocrystalline superlattice is remarkably improved, the requirement for experimental equipment is low, and the nanocrystalline superlattice material is expected to be produced in batch.