1209 results about "Copper salt" patented technology

The invention discloses a composite electrode material for removing uranium through photoelectrocatalysis and a preparation method and application of the composite electrode material, and belongs to the technical field of catalytic materials and wastewater treatment.The preparation method of the composite electrode material comprises the following steps that a ZIF-8 material, copper salt and ferric salt are mixed, and a first metal composite material is prepared; reacting the first metal composite material with a KOH solution to prepare a second metal composite material; carrying out carbonization treatment on the second metal composite material, and then carrying out acid treatment by using acid to obtain a bimetallic atom catalytic material; the preparation method comprises the following steps: dispersing a bimetallic atom catalytic material and a g-C3N4 material in a mixed solution containing phytic acid and a Nafion solution to obtain catalyst ink; and coating the catalyst ink on a substrate, and carrying out illumination drying to obtain the composite electrode material. According to the composite electrode material, under the synergistic effect of the bimetallic single atomic cluster catalyst and g-C3N4, respective advantages are fully exerted, and efficient deposition removal of uranium is achieved.

The invention discloses a composite electrode material for a zinc-bromine flow battery and a preparation method and application thereof, and the preparation method comprises the following steps: S1, uniformly stirring a copper salt, a zinc salt, a sodium salt and distilled water at room temperature, aging in air, and then filtering, washing and drying to obtain a zinc-copper composite salt; s2, adding a polymer into an organic solvent under a stirring condition, and stirring under a water bath condition to obtain a spinning solution; then adding zinc-copper composite salt, stirring and then carrying out ultrasonic dispersion to obtain a composite spinning solution; s3, preparing the composite spinning solution into a precursor nanofiber material by utilizing high-voltage electrostatic spinning; and S4, carrying out pre-oxidation and carbonization treatment on the precursor nanofiber material in an atmosphere furnace, and cleaning and drying the carbonized material to obtain the composite electrode material for the zinc-bromine flow battery. According to the invention, the problems of low surface activity of bromine electrode reaction on an electrode material, unstable electro-catalytic performance, bromine permeation and the like in the zinc-bromine flow battery can be solved.

The invention relates to the technical field of catalysts, and discloses a preparation method and application of a copper-based metal-organic framework catalytic material.The preparation method comprises the following steps that S1, cuprous salt, N, N '-bis (5-aminonicotinyl) naphthalimide and a solvent are mixed, and a mixture is obtained; s2, heating the mixture to a reaction temperature, carrying out a constant-temperature reaction, and cooling to obtain a crystal; and S3, washing and drying the crystal to obtain the copper-based metal-organic framework catalytic material. According to the preparation method of the copper-based metal-organic framework catalytic material provided by the invention, N, N '-bis (5-aminonicotinyl) naphthalimide is used as an organic ligand to prepare the copper-based metal framework Cu-PTD with N / O co-coordination, and the copper-based metal framework Cu-PTD has relatively strong electrocatalytic carbon dioxide reduction and electron transfer capabilities; and the catalyst has relatively high selectivity on electrocatalytic carbon dioxide reduction products.

The invention is applicable to the technical field of nano material preparation, and provides a preparation method of a two-dimensional acetylene-rich carbon / molybdenum sulfide heterostructure hydrogen production catalyst, which comprises the following steps: adding molybdenum sulfide into a solution to prepare a suspension A; adding soluble cuprous salt into the turbid liquid A in an inert atmosphere to obtain a mixed liquid B; alkynyl benzene is added into an organic solvent, and a mixed solution C is obtained; dropwise adding the mixed solution C into the mixed solution B under a continuous stirring condition, and reacting to obtain a mixed solution D; centrifuging the mixed solution D to obtain a precursor E; and cleaning the precursor E, and carrying out vacuum drying to obtain the two-dimensional acetylene-enriched carbon / molybdenum sulfide heterostructure hydrogen production catalyst. No additive is needed in the preparation process, and the product purity is high; by constructing a special two-dimensional heterostructure, the problem of molybdenum sulfide is solved, and the intrinsic activity and stability of the material are remarkably improved. The preparation method has the advantages of easily available raw materials, simple process, low cost and environmental protection, and is suitable for industrial production.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly relates to a spinel type metal oxide coated hard carbon composite material based on a lattice matching mechanism, and a gradient doping preparation method of the spinel type metal oxide coated hard carbon composite material can overcome the defects that a hard carbon material is low in initial coulombic efficiency (about 50%), low in lithium ion transmission rate and poor in rate capability. According to the invention, magnesium salt, aluminum salt, copper salt and other metal salts are mixed with hard carbon, a precipitant is added, and a hydrothermal method is combined with a calcination process to obtain the core-shell structure composite material with hard carbon coated with a spinel structure. The technology has the following three obvious advantages: (1) lattice adaptive design of the spar type metal oxide and the hard carbon, (2) molybdenum-copper gradient doping repair of the SEI film, and (3) stable circulation of more than 5000 times at the capacity of 350mAh / g.

The invention relates to the technical field of new material detection, in particular to a copper foil coating content detection method. The method comprises the following steps: preparing a plurality of mixed standard solutions; the mixed standard solution comprises copper ions and at least one to-be-detected element ion; in the plurality of mixed standard solutions, the copper ion concentrations are the same and are first preset concentration values; measuring a plurality of mixed standard solutions, and establishing a standard curve between a theoretical value and a measured value of the ion concentration of each to-be-measured element; dissolving a plating layer on the surface of the to-be-detected copper foil by using nitric acid, and filtering to obtain a to-be-detected sample solution; adding copper salt into the to-be-detected sample solution to obtain a to-be-detected analysis solution; measuring the to-be-measured analysis solution to obtain the measurement concentration of each to-be-measured element ion; according to the measured concentration of each to-be-measured element ion and the corresponding standard curve, the corrected content of each to-be-measured element ion is obtained. The problem that an existing copper foil coating content detection method is low in detection accuracy is solved.

The invention belongs to the technical field of gas sensor materials, and particularly relates to a novel high-conductivity conjugated coordination polymer gas-sensitive material, an ammonia gas sensor and a preparation method. Copper salt and 1, 5-diamino-4, 8-dihydroxy anthraquinone or 1-amino-4-hydroxy anthraquinone are used as raw materials, two novel high-conductivity conjugated coordination polymer materials are prepared by adopting a simple solvothermal method, and the preparation method is simple in process and can be used for mass production of materials. The obtained material can form a film on planar electrodes at two ends to prepare a resistance-type ammonia gas sensor, so that ammonia gas can be detected in a concentration range of 2.3 ppb-100 ppm, and the defects of narrow detection range and insufficient sensitivity of a single material in the prior art are overcome.

The invention discloses a lanthanum-doped CuMgAl catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the lanthanum-doped CuMgAl catalyst comprises the following steps: adding a copper salt, a magnesium salt, an aluminum salt and a lanthanum salt into water to obtain a first solution; adding a precipitator into water to obtain a second solution; adding the second solution into the first solution to adjust the pH value to 10.5 to obtain a mixed solution, stirring the mixed solution to generate a co-precipitation reaction, after the reaction is completed, carrying out aging treatment to promote growth and structure ordering of layered double hydroxide crystals, and then carrying out calcination treatment to convert a layered double hydroxide precursor into an oxide, thereby obtaining the layered double hydroxide. And the lanthanum-doped CuMgAl catalyst is obtained. The lanthanum-doped CuMgAl catalyst prepared by the preparation method disclosed by the invention has excellent activity and stability.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for removing metallic impurities from acidic copper-containing etching wastewater at room temperature and pressure. The method includes the following steps: S1, adding an oxidant to the acidic copper-containing etching wastewater to conduct an oxidation-reduction reaction, obtaining a pretreatment solution; S2, adding phosphoric acid or soluble phosphate to the pretreatment solution, adjusting the pH to 1.3-1.7 using a pH adjuster, stirring, and filtering to obtain a purified copper-containing solution. The method provided by this invention achieves high removal rates for Fe, Ni, Zn, Ca, and Mg, while maintaining a high copper ion content. It can recycle and regenerate high-purity copper salt products for application in food, cosmetics, medical, electroplating, and other fields, while also reducing hazardous waste generation, improving economic efficiency, and significantly reducing costs.

The invention discloses a biological carbon / graphene composite material as well as a preparation method and application thereof. The method comprises the following steps: impregnating a biomass raw material with a copper salt solution to obtain a precursor; the precursor is pyrolyzed to obtain a copper oxide modified biological carbon material, then under the conditions of reducing atmosphere and high temperature, carbon dioxide serves as a carbon source, graphene is generated on the copper oxide modified biological carbon material in situ, the biological carbon / graphene / copper composite material is obtained, and the biological carbon / graphene / copper composite material is subjected to copper leaching treatment to obtain the graphene / copper composite material. Obtaining a finished product. The composite material has excellent electrochemical performance, and has excellent rate capability, capacitance and long cycle service life when being used for preparing a capacitor. The preparation method is simple, low in cost and suitable for industrial production.

The invention relates to the technical field of chemical catalysis, in particular to a copper-silicon catalyzed cyclohexanol gradient dehydrogenation and hydrogen recycling method which comprises the following steps: step 1, preparing a gradient catalyst, namely carrying out surface hydroxyl regulation pretreatment on porous silica gel, and loading a copper salt solution by adopting a step-by-step impregnation method to form gradient distribution with gradually decreased copper loading capacity from outside to inside, carrying out segmented heating reduction in a reducing atmosphere containing 5vol% of H2 / N2; 2, gradient dehydrogenation reaction process control; and 3, hydrogen in-situ separation and cyclic utilization: separating hydrogen from the reaction outlet gas through a palladium alloy membrane, controlling the pressure difference of the two sides of the membrane to maintain the permeation flux, returning the separated hydrogen to the inlet of the reactor to adjust the hydrogen partial pressure, and storing the residual hydrogen. Through gradient catalyst preparation, accurate reaction process control and efficient hydrogen recovery technologies, the cyclohexanone production efficiency is improved, and long-term stability of the catalyst and efficient recycling of hydrogen are achieved.

The invention discloses a high-entropy metal oxide catalyst as well as a preparation method and application thereof in CO catalytic oxidation, and belongs to the technical field of flue gas treatment. The preparation method comprises the following steps: dissolving copper salt, manganese salt, cerium salt, cobalt salt, vanadium salt and a dispersing agent into water to form a uniform solution, and slowly adding excessive alkali precipitant into the uniform solution to form a solid-liquid mixture; the solid-liquid mixture is transferred into a high-pressure kettle to be subjected to a hydrothermal reaction and then quenched, an obtained hydrothermal reaction product is calcined, and the high-entropy metal oxide catalyst is obtained and is high in catalytic oxidation activity on carbon monoxide at the low temperature, excellent in water resistance and sulfur resistance and particularly suitable for treatment of complex flue gas.

The invention belongs to the technical field of waste lithium battery recovery, and particularly relates to a method for selectively extracting lithium from a waste lithium battery positive electrode material based on activation and oxidation, which comprises the following steps: mixing the waste lithium battery positive electrode material, an oxidizing agent, an activating agent and a solvent, stirring and leaching, and carrying out solid-liquid separation to obtain a lithium-rich leaching solution and valuable metal leaching residues; wherein the activating agent is one or more than two of divalent ferrite, divalent cobalt salt, divalent manganese salt, divalent copper salt and monovalent silver salt, and the waste lithium battery positive electrode material is selected from one or more than two of waste nickel cobalt lithium manganate batteries, waste nickel cobalt lithium aluminate batteries, waste lithium cobalt oxide batteries and waste lithium manganate batteries. Through the synergistic effect of the oxidizing agent and the activating agent, preferential extraction of lithium in the raw material is achieved in one step, the problem that the lithium loss amount is large in the later lithium extraction process is solved, and the method has the advantages of being easy and convenient to operate, short in technological process, good in lithium selectivity, high in lithium leaching rate, wide in temperature application range and low in recovery cost.

The invention relates to the technical field of electrocatalysts, and discloses a heterojunction catalyst composed of cobalt-copper co-doped ruthenium dioxide and metal ruthenium as well as a preparation method and application of the heterojunction catalyst. The preparation method comprises the following steps: carrying out hydrothermal reaction on cobalt salt and trimesic acid in a mixed solvent to prepare a cobalt metal organic framework precursor; a cobalt-copper bimetal organic framework is obtained through ion exchange of a copper salt solution; preparing a ruthenium-cobalt-copper ternary metal organic framework by adopting secondary ion exchange of a ruthenium salt solution; and carrying out air calcination treatment to obtain the cobalt-copper co-doped ruthenium dioxide and metal ruthenium heterojunction catalyst. According to the method, cobalt and copper atoms are uniformly doped in ruthenium dioxide crystal lattices through a step-by-step ion exchange strategy, and metal ruthenium nano-particles are grown on the surface in situ to form a heterogeneous interface. The obtained catalyst shows excellent performance in an acidic electrolyzed water anode oxygen evolution reaction, the overpotential is only 199 mV under the current density of 10 mA. Cm, and the stability can be maintained for 40 hours.

The invention provides a surface treatment agent, a surface treatment method of a copper foil and a copper foil negative electrode current collector, and belongs to the technical field of energy materials. The copper salt is used as a copper source, the N-alkyl pyridine halogen salt ionic liquid is used as a halogen source, the copper salt and the N-alkyl pyridine halogen salt ionic liquid react in the solution to form cuprous halide particles on the surface of the copper foil in situ, the specific surface area and the roughness of the surface of the copper foil negative electrode current collector are increased, the copper foil negative electrode current collector is firmly combined with an active substance, and therefore the specific capacity and the rate of the lithium ion battery are improved; cu < + > in the cuprous halide particles formed on the surface of the copper foil also participates in electrochemical reaction, so that the specific capacity of the lithium ion battery is further improved. The result of the embodiment shows that the capacity of the lithium ion battery prepared from the copper foil negative current collector obtained by carrying out surface treatment on the copper foil by the surface treating agent provided by the invention can reach 825mAh g <-1 >; 100 times of charge-discharge cycles are carried out under the large current density of 1Ag <-1 >, and the retention rate can reach 95%.

The invention relates to a Cu2-xSe-Pt nano material, a microneedle patch, a preparation method and application. The Cu < 2-x > Se (at) Pt nano material is composed of a Cu < 2-x > Se nanosphere and platinum modified on the surface of the Cu < 2-x > Se nanosphere in situ. The invention provides a preparation method of a Cu2-xSe-Pt nano-material, which comprises the following steps: adding PSS, SeO2 and AA into water, heating and stirring, adding copper salt and AA, reacting, and adding water and a hexachloroplatinic acid solution to obtain the Cu2-xSe-Pt nano-material. The invention provides an application of a Cu < 2-x > Se (at) Pt nano material. The invention also provides a microneedle patch as well as a preparation method and application thereof. The invention provides a novel material for resisting multi-drug-resistant bacteria, which solves the problems that the existing single antibacterial strategy is limited and the expected curative effect cannot be achieved, also solves the problem of cytotoxicity of the existing nano enzyme, realizes deep drug delivery, ensures efficient local drug release and avoids systemic toxicity.

The invention relates to the technical field of hydrogen production catalysts, in particular to a preparation method of a supported methanol steam reforming hydrogen production catalyst. Comprising the following steps: S1, dissolving copper salt, adding indium oxide, heating in a water bath to evaporate water, drying, and carbonizing to obtain a Cu / In2O3 catalyst; s2, adding the Cu / In2O3 catalyst and tris (hydroxymethyl) aminomethane into water, then adding dopamine hydrochloride for reaction, and performing centrifugal washing and drying to obtain a precipitate; and S3, grinding and carbonizing the precipitate to obtain the nitrogen-doped carbon modified Cu / In2O3 catalyst. After the surface of the Cu / In2O3 catalyst is modified by carbon, strong electron interaction exists between carbon and metal copper, metal Cu electrons are promoted to be transferred to nitrogen-doped carbon, and the formed Cu < + > species enhance the catalytic activity for catalyzing methanol steam reforming hydrogen production and the selectivity for hydrogen.

The invention discloses a composite adsorbent for removing tetracycline in wastewater and a preparation method thereof, and relates to the field of wastewater treatment.The preparation method comprises the following steps that gasified slag and corn roots are pretreated and then mixed and pyrolyzed to prepare a magnetic biochar substrate, the magnetic biochar substrate is dispersed in a solvent, copper salt and organic ligands are added, and the magnetic biochar substrate is obtained; and collecting products through an external magnetic field to obtain the composite adsorbent for removing tetracycline in wastewater. A copper-based metal organic framework material grows in situ on a gasified slag / corn root biochar substrate, and the specific surface area of the material is increased by using a highly ordered porous structure of MOF; through the combined action of various mechanisms, the adsorbent shows extremely high adsorption capacity and good selectivity on tetracycline molecules.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for removing metal impurities from acidic copper-containing etching wastewater at normal temperature and pressure. The method for removing the metal impurities from the acidic copper-containing etching wastewater at normal temperature and pressure comprises the following steps: S1, adding an oxidizing agent into the acidic copper-containing etching wastewater to carry out oxidation-reduction reaction to obtain a pretreatment solution; and S2, phosphoric acid or soluble phosphate is added into the pretreatment solution, the pH is adjusted to 1.3-1.7 through a pH adjusting agent, stirring and filtering are conducted, and the purified copper-containing solution is obtained. According to the method, the removal rate of Fe, Ni, Zn, Ca and Mg is high, high-content copper ions can be kept, a high-purity copper salt product can be recycled and regenerated to be applied to the fields of food, cosmetics, medical treatment, electroplating and the like, hazardous waste can be reduced, economic benefits are improved, and cost is greatly reduced.

The invention belongs to the technical field of nano material preparation, and provides a preparation method and application of a rare earth ytterbium-doped copper oxide nano material. The method comprises the following steps: dissolving rare earth ytterbium salt, copper salt and a surfactant in a solvent, and uniformly stirring; dissolving an organic ligand in a solvent; stirring and mixing the two solutions, transferring into a reaction kettle, and carrying out hydrothermal reaction; and centrifugally washing the obtained product with ethanol, and drying to obtain the rare earth ytterbium doped metal organic precursor nano material. And placing the obtained nano material in a muffle furnace for high-temperature calcination to obtain the rare earth ytterbium doped copper oxide material. The preparation method provided by the invention is simple, green, pollution-free and high in practical degree, and the obtained rare earth ytterbium-doped copper oxide nano material can be used as a catalyst for synthesizing ammonia by electrolytic nitrate reduction, and shows that the rare earth ytterbium-doped copper oxide nano material has relatively high ammonia yield and Faraday efficiency for synthesizing ammonia by nitrate reduction.

The invention relates to a crop nutrition and fortification composition comprising: elemental sulphur in a range of 1% to 90% by weight; one or more water insoluble or water soluble iron salts or derivatives or mixtures thereof, wherein elemental iron content is in the range of 0.1% to 50% by weight; one or more water insoluble or water soluble zinc salts or derivatives or mixtures thereof, wherein elemental zinc content is in the range of 0.1% to 55% by weight; one or more water insoluble or water soluble magnesium salts or derivatives or mixtures thereof, wherein elemental Magnesium content is in the range of 0.5% to 50% by weight; one or more water insoluble or water soluble boron salts or derivatives or mixtures thereof, wherein elemental boron content is in the range of 0.01% to 25% by weight; one or more water insoluble or water soluble manganese salts or derivatives or mixtures thereof, wherein elemental manganese content is in the range of 0.1% to 40% by weight; one or more water insoluble or water soluble copper salts or derivatives or mixtures thereof, wherein elemental copper content is in the range of 0.1% to 40% by weight; and, one or more surfactants in the range of 0.1 to 40% by weight. The composition is in the form of water dispersible granules and liquid suspension, wherein the compositions have a particle size of range of 100 nanometers to 5 microns and has an average particle size diameter distribution of less than 1000 nanometers and wherein the total content of the water soluble salts, derivatives or mixtures in the composition does not exceed 80% by the weight of the total composition. The invention also relates to a process of preparing the crop nutrition and fortification composition and to a method of treating the plants, seeds, crops, plant propagation material, locus, or parts thereof or soil with the crop nutrition and fortification composition.

The invention relates to the technical field of electrode materials, in particular to a CuO-coated PVDF electrode material and a preparation method and application thereof.The preparation method comprises the following steps that a waste solar photovoltaic back plate is smashed and hydrolyzed under the alkaline condition, a polyethylene glycol terephthalate layer on the surface of the photovoltaic back plate reacts with alkali to generate ethylene glycol and terephthalic acid salt, and then a CuO-coated PVDF electrode material is obtained; pVDF in the photovoltaic backboard is separated in a precipitation form, and PVDF is prepared; the preparation method comprises the following steps: dissolving a cupric salt and a cationic surfactant in water, carrying out a co-precipitation reaction at room temperature in an alkaline environment to generate a nano Cu (OH) 2 precipitate, and drying and decomposing to obtain a CuO precursor; cuO, PVDF, acetylene black and an organic solvent are mixed and stirred, in the stirring process, the surface of CuO is coated with PVDF in situ, acetylene black is evenly distributed, and the CuO-coated PVDF electrode material with CuO nanoparticles as an inner core, PVDF as a shell and acetylene black evenly distributed is formed.

The invention relates to a composite nanofiber membrane and a preparation method and application thereof, and belongs to the technical field of wearable electromagnetic shielding materials. The preparation method comprises the following steps: dissolving polyacrylonitrile in a solvent, and spinning to obtain a polyacrylonitrile nanofiber membrane; then, the polyacrylonitrile nanofiber membrane is soaked in a trihydroxymethyl aminomethane hydrochloride solution containing dopamine; soaking the dopamine-coated fiber membrane in a mixed solution containing a copper salt or a silver salt, and then soaking the dopamine-coated fiber membrane in a reaction solution to obtain a modified nanofiber membrane; then spraying a dispersion liquid containing a conductive filler onto the modified nanofiber membrane to obtain a conductive filler modified nanofiber membrane; and finally, dissolving polyurethane into a solvent, and spinning by taking the conductive filler modified nanofiber membrane as a receiver to obtain the composite nanofiber membrane. The composite nanofiber membrane has excellent electromagnetic shielding performance, directional perspiration ability, air permeability, photothermal conversion ability, antibacterial property, mechanical strength and flexibility.

The application belongs to the technical field of photo-thermal catalysts, and particularly relates to a molecular sieve photo-thermal catalyst for methane oxidation to prepare methanol and a preparation method thereof, the catalyst has a structural formula of Cu / M-ZSM-5, and the preparation method comprises the following steps: S1: uniformly mixing a silicon source, an aluminum source, a metal source, a template agent and water to form a starting gel; S2: performing hydrothermal crystallization, centrifugal separation, washing until neutral, and drying to obtain a molecular sieve raw powder; S3: performing calcination to obtain M-ZSM-5 molecular sieve; and S4: under ultrasonic wave conditions, ion exchanging M-ZSM-5 with a copper salt solution, and performing rotary evaporation and drying to obtain the Cu / M-ZSM-5 photo-thermal catalyst. The catalyst is filled into a fixed bed reactor, helium is introduced, the temperature is raised to an activation temperature, the catalyst is activated, and a mixed gas of methane, oxygen and water is introduced; when the doped metal is Zn, the methanol yield of the Cu / Zn-ZSM-5 photo-thermal catalytic methane is 100.05 micromoles g cat ‑1 h ‑1 , which is increased by 91% compared to the methanol yield of Cu / ZSM-5. The catalyst exhibits excellent catalytic performance and stability in the reaction of preparing methanol by photo-thermal catalysis of methane.

The invention relates to an enzyme response antibacterial carbon dot and a preparation method and application thereof.The carbon dot takes a copper-doped carbon dot as a core and is covalently grafted with a hyaluronic acid shell layer through amidation reaction to form a composite nano material Cu-CDs (at) HA, specifically, soluble copper salt and folic acid are subjected to a hydrothermal reaction to obtain the copper-doped carbon dot, carboxyl is activated through EDC / NHS in a buffer system, and the carbon dot is prepared. And performing grafting reaction with hyaluronic acid to obtain a target product. The hyaluronidase-containing antibacterial composition can be specifically degraded and release antibacterial components under the action of hyaluronidase, shows good bacterial responsive bactericidal performance, has the minimum inhibitory concentrations of 8 g / mL and 16 g / mL for staphylococcus aureus and escherichia coli respectively, and has peroxidase-like activity and free radical scavenging capacity. The antibacterial carbon dots can be used for preparing intelligent wound dressings, antibacterial coatings and other biomedical materials, and have the advantages of responsive drug release, efficient antibacterial property and promotion of wound repair.

The invention relates to a method for synthesizing 1, 4-butanediamine and co-producing NMP (N-Methyl Pyrrolidone), which comprises the following steps: dissolving 1, 4-butanedinitrile in a solvent, and reacting with introduced hydrogen and carbon dioxide under the action of a bi-component composite catalyst to obtain a product containing 1, 4-butanediamine, carrying out separation and purification treatment on the obtained product containing 1, 4-butanediamine to obtain 1, 4-butanediamine and NMP (N-Methyl Pyrrolidone); the active components of the bi-component composite catalyst comprise nickel salt and copper salt. According to the method disclosed by the invention, the carbon dioxide carbon source is introduced, so that the conversion of the byproduct butyrolactam into the NMP product with a high added value is realized, the combined yield of the 1, 4-butanediamine and the NMP and the conversion rate of the 1, 4-butanedinitrile are relatively high, and the economic benefit is remarkably improved.

The invention relates to a rapid biosynthesis method and antibacterial application of a photo-thermal nano material (Cu, Co) Se2. The method comprises the following steps: step 1, culturing dissimilatory metal reducing bacteria in a culture medium to a platform earlier stage, and activating; 2, the activated dissimilatory metal reducing bacteria are inoculated into an anaerobic culture medium, then bivalent copper salt and selenite are added, and Cu2-xSe nanoparticles are synthesized through a reaction under the anaerobic condition; wherein x is equal to 0-1; 3, divalent cobalt salt continues to be added under the anaerobic condition, thalli are separated into supernate through differential centrifugation, sediment is collected, and (Cu, Co) Se2 nanoparticles are obtained; step 4, carrying out cell disruption treatment on the (Cu, Co) Se2 nanoparticles; the light absorption range and intensity of the original selenide are improved, the photo-thermal efficiency of the selenide is enhanced, and the photo-thermal metal nano material (Cu, Co) Se2 can be efficiently, rapidly and controllably synthesized by the synthesis method.

The invention relates to the technical field of electro-catalysis, in particular to a Cu-In2O3 nanoparticle catalyst as well as a preparation method and application thereof. The method comprises the following steps: dissolving a soluble copper salt and a soluble indium salt in water together, mixing with an alkali solution, carrying out a precipitation reaction, and combining copper ions and indium ions with OH <-> ions in alkali in the precipitation reaction process to generate copper hydroxide and indium hydroxide so as to obtain a precipitate; freeze-drying the precipitate to obtain a precursor; and calcining the precursor in a mixed atmosphere of hydrogen and inert gas to obtain the Cu-In2O3 nanoparticle catalyst. The Cu-In2O3 nanoparticle catalyst disclosed by the invention not only has excellent catalytic activity and high selectivity to formic acid, but also has good stability and reusability. When the Cu-In2O3 nano-particle catalyst is applied to the electrocatalytic carbon dioxide reduction reaction, the energy consumption can be effectively reduced, and the production efficiency and the product quality of formic acid can be improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a high-entropy fluoride electrode material and a preparation method and application thereof. The preparation method of the high-entropy fluoride electrode material comprises the following steps: dispersing a surfactant in a solvent, adding a soluble iron salt, a soluble nickel salt, a soluble manganese salt, a soluble copper salt and a soluble chromium salt, uniformly mixing, and adding a fluorine source to obtain a precursor solution; the precursor solution is placed at the temperature of 120 DEG C to 140 DEG C for a reaction, uniform FeF3, NiF2, MnF2, CuF2 and CrF3 are formed, and a high-entropy fluoride precursor is obtained; and annealing the high-entropy fluoride precursor in a protective atmosphere to obtain the high-entropy fluoride electrode material. The high-entropy fluoride electrode material prepared by the invention shows excellent reversible capacity and excellent cycling stability.

The invention discloses a copper-based catalyst for preparing acetaldehyde through ethanol dehydrogenation as well as a preparation method and application of the copper-based catalyst. The preparation method comprises the following steps: S1, carrying out alkalization treatment on protic mordenite in a strong alkali solution to increase the number of surface hydroxyl groups of the protic mordenite; and S2, adding the mordenite obtained in the step S1 into a copper salt solution to load copper ions, and then sequentially carrying out low-temperature drying shaping and medium-temperature activation stages to obtain the copper-based catalyst with networked Cu-OH-Si-O bonds on the surface. Through the synergistic effect of alkali liquor regulation and control and staged oxygen roasting, the dispersity and stability of a Cu active center in the catalyst are improved, the acetaldehyde selectivity of the reaction of preparing acetaldehyde through ethanol dehydrogenation is also improved, and side reactions are inhibited. Carrying out heat treatment regeneration on the inactivated copper-based catalyst in an oxygen-containing atmosphere; and after regeneration, the networked Cu-OH-Si-O bond on the surface of the copper-based catalyst is reconstructed.