14results about How to "Suitable for large-scale preparation" patented technology

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for preparing a sponge iron-based ferrous silicate reducing agent for wastewater treatment. Sponge iron is activated in a dilute phosphoric acid solution to obtain activated sponge iron; the activated sponge iron is washed and then immersed in a ferrous solution, removed and washed, and then matured in a sodium silicate solution to obtain matured sponge iron; the matured sponge iron is washed and freeze-dried to obtain the sponge iron-based ferrous silicate reducing agent. The sponge iron-based ferrous silicate reducing agent prepared by this invention is easily separated from the effluent and has excellent and long-lasting reducing performance. It solves the problems of high reducing agent dosage, high salinity of the treated effluent, generation of large amounts of iron sludge, and the need for continuous addition of reducing agent in traditional reduction processes. Furthermore, the preparation method is simple, requiring no complex equipment or catalysts, and the raw material, sponge iron, is inexpensive and widely available, resulting in low production costs and suitability for large-scale preparation and engineering applications.

This invention relates to the field of materials technology, and more particularly to a 3D-printed, internally hollowed-cone solar interface evaporator with directional salt deposition function, its preparation method, and its application. The invention includes step 1: three-dimensional model construction; step 2: substrate surface pretreatment and chemical activation; and step 3: hydrothermal preparation of a Co-Bi-S coating. This invention uses a 3D-printed porous, internally hollowed-cone resin device as a substrate, and grows a Co-Bi-S coating in situ on its surface using a hydrothermal method. This coating exhibits both excellent photothermal conversion performance and corrosion resistance. The evaporator structure is designed as a porous, internally hollowed-cone shape, which provides a larger evaporation area, stronger light capture and focusing capabilities, and can achieve higher evaporation temperatures and directional salt deposition effects. The prepared solar interface evaporator exhibits excellent photothermal conversion performance and water evaporation efficiency, and also demonstrates good structural stability and corrosion resistance. This solves the technical problems of low photothermal conversion efficiency and poor stability in high-salt environments inherent in traditional solar evaporators, making it suitable for applications such as seawater desalination.

The application discloses a kind of FeCoNi nanoparticle loaded yeast-derived carbon composite wave-absorbing materials and preparation method thereof.The method uses yeast as biomass carbon source, and yeast-derived carbon is obtained by hydrothermal carbonization;Then, the three-metal precursor salt (Fe2+, Co2+, Ni2+) is dissolved in the solvent according to a certain mass ratio with yeast-derived carbon, and FeCoNi nanoparticles are in-situ loaded on the surface of yeast-derived carbon by hydrothermal impregnation method, and the composite wave-absorbing material is obtained after drying and inert atmosphere heat treatment.The FeCoNi nanoparticles in the obtained material are uniformly dispersed on the surface of carbon material, and the synergistic effect of dielectric loss and magnetic loss is utilized to achieve excellent electromagnetic wave absorption performance.The method is simple, low in cost, and requires small equipment, and the prepared material is environmentally friendly, sustainable, and has strong controllability, etc., and is suitable for radar stealth field.

The application belongs to the technical field of biological nanomaterials, and particularly relates to a nano-enzyme material and a preparation method and application thereof. The application reacts dimethyl imidazole and metal salt in an aqueous solution to obtain a metal-dimethyl imidazole composite material solution, wherein the metal salt comprises copper salt and / or zinc salt; and reacts the metal-dimethyl imidazole composite material solution and tannic acid to obtain a nano-enzyme material. The nano-enzyme material provided by the application has excellent antioxidant enzyme-like catalytic activity and good biocompatibility, can effectively remove abnormally increased reactive oxygen species (ROS) in the process of myocardial infarction and myocardial ischemia-reperfusion injury, inhibit inflammatory response and myocardial cell apoptosis, improve the mitochondrial function state, thereby promoting the repair of damaged myocardial tissue and significantly improving the cardiac function, and provides a new technical solution for the treatment of myocardial infarction and related ischemic cardiovascular diseases.

The application discloses a metal-loaded vertical array light lanthanum fluoride-based nanosheet catalytic membrane and a preparation method, and belongs to the technical field of catalytic membrane materials. The catalytic membrane comprises a base film, a light lanthanum fluoride-based nanosheet array in-situ vertically grown on the surface of the base film, and metal active species loaded in pores. The catalytic membrane prepared by the application has a uniform distribution and a topological structure nanosheet vertical light lanthanum fluoride-based nanosheet array layer grown on the surface, and simultaneously loads metal active species catalysts in the array layer. The catalytic membrane exhibits high catalytic activity and stability in the field of heterogeneous Fenton catalysis, photocatalysis, and photo-Fenton synergistic catalytic degradation of organic pollutants in water bodies, and the catalytic membrane is easy to separate from wastewater and can be recycled.

The application provides a Ti3C2T x Ag composite particle reinforced copper-based self-lubricating material and a preparation method thereof, and relates to the technical field of metal matrix composite materials. The method comprises the following steps: etching Ti3AlC2 powder to obtain multilayer Ti3C2T x particles; then, silver particles are plated on the surfaces of the Ti3C2T x particles by a chemical plating process to obtain Ti3C2T x Ag composite particles; and finally, the composite particles are mixed with copper-based powder, and the mixture is formed and sintered by a powder metallurgy process to obtain Ti3C2T x Ag composite particle reinforced copper-based self-lubricating material. The application solves the problems of easy agglomeration of Ti3C2T x and silver particles in the matrix and uneven dispersion by constructing a core-shell structure of the reinforcing phase, realizes lubrication synergy of the two at different temperatures, and has the advantages of simple operation, economy, good repeatability, excellent tribological performance of the prepared material, and widened application of copper-based composite materials.

This invention relates to the field of pharmaceutical and chemical intermediates technology, and discloses a novel class of substituted phenylethyl-O-β-D-glucuronide compounds. These compounds are generated using substituted phenylethanol as a substrate and 1-fluoro-D-glucuronic acid as a glycosyl donor, catalyzed by β-glucuronyltransferase derived from *E. coli*. The process yield can reach over 95%, and the reaction conditions are mild and environmentally friendly. Substituted phenylethyl-O-β-D-glucuronide can be efficiently used for the determination of β-glucuronidase activity, and its applications are wide-ranging and reliable. The product can meet the needs of pharmaceutical, food, and other fields for β-glucuronidase activity control. It can be used for enzyme activity detection in the auxiliary diagnosis of clinical diseases, and also for enzyme quality control in fruit juice clarification processes in the food industry, drug precursor activation, and glycan structure analysis in the biopharmaceutical field. The product structure has been verified to be accurate by mass spectrometry and 1H NMR spectroscopy, and enzymatic hydrolysis experiments have confirmed its reliable application.

This invention relates to a high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn hydrogen storage composite material catalyzed by K2TiF6+Nb2O5, belonging to the field of solid-state hydrogen storage materials technology. It solves one of the problems of existing magnesium-based hydrogen storage materials, namely, high thermodynamic stability, complex activation process, high hydrogen desorption temperature, and slow hydrogen absorption / desorption kinetics. This invention discloses a Mg-based solid-state composite hydrogen storage material, the composition of which is: Mg... 95‑x‑y Sm x Nd y Ca2Cu 3‑z Zn z +m wt.%(K2TiF6+Nb2O5), where x, y, and z are atomic ratios, and 0.5≤x≤2, 0.5≤y≤2, 0.2≤z≤3, m is the percentage of K2TiF6+Nb2O5 in the alloy, 4≤m≤10, the mass ratio of K2TiF6 to Nb2O5 is 1:1, the preferred atomic ratio is 1.5:1.5:0.8, m=6. This high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn-based solid hydrogen storage composite material has high hydrogen absorption and desorption capacity and excellent hydrogen absorption and desorption kinetics; moreover, the preparation process is simple and easy to operate, suitable for large-scale preparation, and can be used as a hydrogen storage / hydrogen supply carrier in various scenarios.

The present invention discloses a multi-walled carbon nanotube-supported high-entropy alloy catalyst, its preparation method and application. The high-entropy alloy catalyst consists of a multi-walled carbon nanotube support and high-entropy alloy nanoparticles supported on the surface of the multi-walled carbon nanotube support. The high-entropy alloy nanoparticles are composed of five metal elements, namely Fe, Co, Ni, Pt, and In, to form a thermodynamically stable FeCoNiPtIn high-entropy alloy solid solution phase. The high-entropy alloy nanoparticles are anchored on the surface of the support through chemical bonding and have a delocalized electron structure formed by d-p / d-d / sp hybridization. The catalyst prepared according to the method of the present invention exhibits excellent activity and durability in the hydrogen evolution reaction, can achieve long-term stable operation, and provides a reliable and efficient preparation technology solution with excellent performance for the large-scale industrial promotion of the electrolytic water hydrogen evolution reaction.

This invention relates to a bis(naphthalimide)-based blue dye, its preparation method, and an electrowetting display ink. The dye has the following structural formula: it comprises two naphthalimide units, each containing one aromatic amine group and two straight-chain or branched alkyl groups, bridged by a diamine. The preparation method uses dibromonaphthalimide as an intermediate, which undergoes nucleophilic substitution reactions with the diamine and aromatic amine, respectively, to obtain the dye. The preparation method of the bis(naphthalimide)-based blue dye provided by this invention is simple in procedure, has mild reaction conditions, and is suitable for large-scale preparation.

This invention discloses a method for preparing a cobalt phosphide electrocatalyst with a tunable interfacial water hydrogen bond network and its application, belonging to the field of electrocatalytic materials. The invention uses cobalt nitrate, variable-valence metal chloride salts, and urea as raw materials to synthesize a hydroxide precursor, which is then subjected to a simple low-temperature phosphating reaction followed by in-situ oxidation and reconstruction during the oxygen evolution reaction of water electrolysis. The preparation method of this invention has advantages such as simple operation, high efficiency, environmental friendliness, strong controllability, and low cost. The prepared cobalt phosphide oxygen evolution electrocatalyst possesses advantages such as a tunable interfacial water hydrogen bond network, high stability, and excellent oxygen evolution activity.

This invention belongs to the field of electrocatalytic materials technology, and discloses a PAN-modified NiCoP / NF catalyst for urea-assisted seawater electrolysis and its preparation method. The method uses nickel foam as a support, synthesizes a NiCo precursor via a melt method, and then obtains the catalyst through PAN solution impregnation and one-step phosphating. By controlling the PAN concentration, the morphology and structure of the catalyst can be optimized, achieving a concentration of 0.05 g / mL. 1 A preferred structure was obtained by combining fine nanorods (20-50 nm in diameter) with an appropriate amount of amorphous carbon layer. The material exhibited excellent hydrogen evolution activity in alkaline seawater electrolyte, at 10 mA cm⁻¹. 2 The overpotential at the specified current density is 44 mV. In an alkaline seawater-urea mixed electrolyte, the overpotential of the urea oxidation reaction at the same current density is 1.32 V, which is significantly lower than the overpotential of the oxygen evolution reaction by 180 mV, demonstrating the dual advantages of high efficiency, energy saving, and wastewater resource utilization. This invention features a simple process and controllable structure, showing promising application prospects in the fields of hydrogen production through water electrolysis and urea wastewater treatment.

The invention belongs to the technical field of photoelectric functional materials, and discloses a multi-acid-group photoelectric functional material with a reverse photoconduction programmable switching characteristic, and a preparation method and application of the multi-acid-group photoelectric functional material. The polyacid-based photoelectric functional material with the reverse photoconduction programmable switching characteristic is inorganic-organic hybrid polyniobium oxysalt, the chemical composition of the polyacid-based photoelectric functional material is [Ni (BTP)] 4 [Nb10O26]. 35H2O, BTP is a Bis-tris propane organic ligand, and the Bis-tris propane organic ligand is a Bis-tris propane organic ligand. When the multi-acid-group photoelectric functional material with the reverse photoconduction programmable switching characteristic is constructed into a photoelectric device and applied with external bias voltage and illumination, the photoconduction response polarity can be reversibly switched between positive photoconduction and reverse photoconduction, and reversible switching is regulated and controlled by excitation light wavelength and environment relative humidity. The method has important application value in the fields of photoelectric detection, environment sensing and multi-stimulus response optoelectronic devices.

The present application relates to a kind of catalysts for sodium borohydride hydrolysis hydrogen production, especially a kind of CoB / NF sodium borohydride hydrolysis catalyst, preparation method and application.The preparation method includes the following steps: using cobalt chloride hexahydrate and sodium borohydride to prepare CoB powder catalyst;The CoB powder catalyst is mixed with binder PVDF, and NMP is added to form slurry;The slurry is coated on foam nickel support substrate, then by annealing treatment to remove NMP solvent, obtain CoB / NF composite material.The preparation method is simple, easy to scale production, the prepared catalyst has excellent stability, high catalytic activity, preparation cost is lower, in the field of sodium borohydride rapid hydrolysis hydrogen production has good application prospect.