496 results about "Copper salt" patented technology

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 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 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.

The present application belongs to the technical field of the synthesis of chiral boron compounds, and in particular relates to an MOF-Cu(II) / CMC composite material, and a preparation method therefor and the use thereof. The preparation method for an MOF-Cu(II) / CMC composite material of the present application comprises: dropwise adding an aqueous solution of sodium carboxymethyl cellulose to an aqueous solution of a bivalent copper salt, performing solid-liquid separation, mixing obtained composite microspheres with an organic solution of trimesic acid, heating the resulting mixture, and subjecting same to solid-liquid separation, so as to obtain an MOF-Cu(II) / CMC composite material. The MOF-Cu(II) / CMC composite material is used in an asymmetric chiral boron addition reaction. The reaction is performed at room temperature, involves mild conditions, is applicable to a wide range of substrates and has a high yield and enantioselectivity. Moreover, the method can achieve the synthesis of a chiral organic boride in a solvent having simple components, providing an efficient new method for the preparation of drug molecules and active intermediates, and also broadening the range of substrates used for the preparation of chiral organic borides.

The invention provides nanoscale superfine copper powder and a preparation method thereof, and belongs to the technical field of metal powder, the preparation method comprises the following steps: dispersing copper salt and a complexing agent in deionized water to obtain a copper salt solution; dispersing a reducing agent and a dispersing agent in deionized water to obtain a reducing solution; dispersing sodium hydroxide in deionized water to obtain a sodium hydroxide solution; the method comprises the following steps: heating a copper salt solution, a reduction solution and a sodium hydroxide solution to 45-80 DEG C, adding the reduction solution into the copper salt solution under a stirring condition, then adding the sodium hydroxide solution to obtain a mixed solution, and reacting for 2-3 hours; and after the reaction is finished, a suspension containing copper powder is obtained, and after solid-liquid separation, washing and drying are conducted, the nanoscale superfine copper powder is obtained. The method is simple in technological process, does not need special equipment and is suitable for industrial production. And the prepared nano copper powder is good in dispersing performance, uniform in particle size distribution, high in purity and suitable for being applied to the field of microelectronic components.

The invention relates to the technical field of catalytic synthesis, in particular to a chloromethylation catalyst, a preparation method of the chloromethylation catalyst and a method for preparing high-purity ortho-position, meta-position and para-position chloromethyl styrene through the chloromethylation catalyst, and the chloromethylation catalyst is prepared by loading sulfonic acid compounds and (or) pyridine compounds and (or) copper salt on a molecular sieve. The method can improve the localization selectivity of chloromethylation. The method for preparing high-purity ortho-position, meta-position and para-position chloromethyl styrene comprises the following steps of: reacting beta-bromophenylethane, paraformaldehyde and lewis acid in the presence of the chloromethylation catalyst to generate chloromethyl beta-bromophenylethane, and then performing elimination reaction under an alkaline condition to generate a chloromethyl styrene crude product; the high-purity ortho-position, meta-position and para-position chloromethyl styrene is obtained after the crude product is rectified, the brand-new catalyst is adopted in the method, the reaction selectivity is enhanced, the process is simple, and industrial production is facilitated.

The application relates to the development and technical field of electrocatalysts, and discloses a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving inorganic copper salt and inorganic zirconium salt, adding the inorganic copper salt and the inorganic zirconium salt into an alkaline solution, and performing hydrothermal reaction to obtain a single-atom zirconium-doped copper oxide precursor; dissolving benzothiadiazole, adding the benzothiadiazole into a dispersion solution of the single-atom zirconium-doped copper oxide precursor to obtain a mixed solution; spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material; and performing electrochemical reduction treatment on the benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material to obtain a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material. The electrode material is applied to an electro-reduction carbon dioxide reaction as a working electrode, exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes high-value-added C 2+ product with high selectivity.

The invention relates to the technical field of catalyst preparation, and discloses a carbon modified copper-based catalyst and a preparation method and application thereof. The method comprises the following steps: (1) sequentially carrying out coprecipitation and aging on an alkaline precipitant solution, a metal salt solution and an anion modifier solution to obtain an intermediate product I; and (2) under the condition that the oxygen concentration is not higher than 5% by volume, roasting the intermediate product I to obtain the carbon modified copper-based catalyst, the anion modifier solution contains sodium dodecyl diphenyl ether disulfonate and sodium gluconate in a molar ratio of 1: (1-10); the pH value of the anion modifier solution is 9-11; the metal salt solution contains zinc salt, copper salt and aluminum salt. The prepared carbon modified copper-based catalyst has the advantages of high conversion per pass of carbon dioxide, low activation temperature, high methanol selectivity, long-period operation and stable structure.

The invention relates to the technical field of photocatalysis, in particular to an I-type p-n heterojunction photocatalyst as well as a preparation method and application thereof. According to the photocatalyst, an n-type semiconductor metal organic framework NUS-8 is used as a matrix, a p-type semiconductor CuO is loaded, and an I-type p-n heterojunction structure is constructed. The preparation method comprises the following steps: by taking NUS-8 and cupric salt as raw materials and N, N-dimethylformamide as a dispersion medium, performing coordination anchoring on Cu < 2 + > on the surface of NUS-8 under solvothermal, oxidizing to form CuO nanoparticles, and constructing a coupling interface to obtain the photocatalyst. An energy band of the material is in I-type (straddling type) arrangement, a built-in electric field is formed by Fermi level difference at an interface, directional separation and migration of photo-induced electrons and holes are effectively driven, and the catalytic activity and stability of a photocatalytic reaction are remarkably improved. The material has the advantages of simple and convenient process, stable structure, excellent photocatalytic performance and the like, and is suitable for environment and energy related fields such as photocatalytic CO2 reduction and the like.

The application provides a modified graphite-phase carbon nitride composite Cu-MOF catalyst and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. First, dicyandiamide and urea are mixed and then calcined to obtain g-C3N4; concentrated nitric acid and concentrated sulfuric acid are added to a suspension of the g-C3N4 to perform oxidation treatment, and modified graphite-phase carbon nitride is prepared; finally, the modified graphite-phase carbon nitride, 1,3,5-benzene tricarboxylic acid and copper salt are dispersed in a solvent to perform hydrothermal reaction, and the modified graphite-phase carbon nitride composite Cu-MOF catalyst is prepared. The carbon nitride is modified by oxidation, oxygen-containing functional groups such as carboxyl and hydroxyl are introduced on the surface of the carbon nitride, chemical bonds are formed with Cu²+ in an in-situ synthesis process, Cu-MOF crystals are induced to grow on the surface of the CNO in a directional manner, a tightly combined heterojunction interface is formed between the CNO and the Cu-MOF, and the efficiency of interface charge transmission is ensured.

The application discloses a gold leaching method for pyrite-containing gold ore, and comprises the following steps: after the pyrite-containing gold ore is finely ground, water is added to obtain a slurry; a gold leaching reagent solution is added into the slurry to obtain a mixed leaching solution; the pH value of the mixed leaching solution is adjusted to alkaline, and leaching treatment is performed; and after filtration, a gold-containing leaching solution is obtained; the gold leaching reagent solution comprises polyphosphate, copper salt and thiosulfate; in the gold leaching reagent, polyphosphate is added; under alkaline conditions, polyphosphate ions can be selectively adsorbed or complexed on the surface active sites of pyrite to form a physical or chemical masking layer, thereby effectively blocking the direct contact of pyrite with dissolved oxygen and thiosulfate in the solution, inhibiting the catalytic decomposition of pyrite, significantly reducing the invalid consumption of thiosulfate, stabilizing the pH value and potential of the leaching system, and guaranteeing the efficient leaching of gold.

The present invention relates to antifouling paint compositions comprising a combination of a binder or base elastomer, a solvent capable of dissolving the binder, and copper salt and / or copper particles. The binder or base elastomer is selected from PIB, BIMS, or PIB mixed with BIMS.

The application belongs to the technical field of electrochemical energy storage materials, and discloses application of a sulfide-based hollow nanobrick heterojunction anode coating material and a preparation method thereof, in particular, application of the sulfide-based hollow nanobrick heterojunction anode coating material to an aqueous zinc ion battery, wherein the sulfide-based hollow nanobrick heterojunction comprises an X metal sulfide and a Y metal sulfide, and the heterojunction is represented as XS-YS n , 0 < n < 3, X is Zn, and Y is selected from one of Sn, Co, Cu or Mo; the preparation method comprises the following steps: mixing a zinc salt and a fluoride etchant, and one of a tin salt, a cobalt salt, a copper salt or a molybdenum salt, and then performing a hydrothermal reaction to obtain a bimetal-based hollow nanobrick precursor; and then performing sulfurization calcination to obtain the XS-YS n . The sulfide-based hollow nanobrick heterojunction can effectively inhibit zinc dendrite growth and interface side reactions, thereby significantly improving the electrochemical stability of the material, and further prolonging the cycle life of the aqueous zinc ion battery.

The application discloses a chlorine axial coordination copper monatomic catalyst, a preparation method and application, and belongs to the technical field of catalytic materials. In the preparation, dicyandiamide is first calcined and treated by thermal stripping for several times to prepare a layered carbon carrier rich in nitrogen defects and anchoring sites; then, the carrier is mixed with copper salt, lithium salt and potassium salt, and a molten salt thermal reaction is carried out under an inert atmosphere; with the high-temperature fluidity and space confinement effect of the molten salt, copper atoms are stably anchored in a monodispersed manner, and a Cu-N x -Cl chlorine axial coordination active center is formed, so that the target catalyst is prepared. When the catalyst is used in a CO2 electrocatalytic reduction reaction, the methane faradaic efficiency reaches 73% under an industrial-grade current density, and the catalyst has good catalytic stability and structural durability in a wide current density range. ‑2 The application provides a new way for controllable preparation of a high-performance monatomic catalyst and utilization of CO2 resources.

The application relates to the technical field of organic synthesis, and discloses a preparation method of a hydrocarbyl carboxylic acid, which comprises the following steps: mixing a hydrocarbyl aldehyde, an oxidizing agent and a first metal salt to perform pre-reaction, and then mixing the reaction system obtained through the pre-reaction with a second metal salt to perform reaction; wherein the first metal salt is selected from at least one of a sodium salt, a potassium salt, a calcium salt, a lithium salt, an iron salt and a copper salt; and the second metal salt is selected from at least one of a zinc salt, a manganese salt, a cobalt salt, a palladium salt and a silver salt. The preparation method of the hydrocarbyl carboxylic acid can greatly shorten the reaction time, and improve the raw material conversion rate, the target product selectivity and the target product purity of the aldehyde oxidation acid reaction.

This invention relates to a method for preparing copper-modified lead apatite. The method includes: sequentially subjecting precursor materials to a first hydrothermal process and a second hydrothermal process, followed by calcination to obtain copper-modified lead apatite; the precursor materials include liquid-phase precursor materials or solid-phase precursor materials; the liquid-phase precursor material is obtained by mixing lead salt, copper salt, phosphorus source, pH adjuster, chelating agent, and solvent; the solid-phase precursor material is obtained by mixing copper compound and lead compound; the temperature of the first hydrothermal process is lower than the temperature of the second hydrothermal process. The preparation method provided by this invention, by treating rationally designed raw materials using a specific hydrothermal process, can obtain copper-modified lead apatite with extremely low impurity content, which is beneficial for broadening the application fields of copper-modified lead apatite and improving its performance.

The invention belongs to the technical field of catalyst preparation, and particularly relates to an efficient hydrophobic methanol catalyst and a preparation method thereof.The method comprises the steps that raw materials such as copper salt, zinc salt and aluminum salt are prepared, the total molar ratio of copper to zinc to aluminum is preset, and the zinc salt and the aluminum salt are split according to the deviation smaller than or equal to 10% from the total molar ratio; preparing a first salt solution, a second salt solution, an auxiliary solution and an alkali solution; the method comprises the following steps: establishing a first liquid level of a reaction kettle, adding a first salt solution and alkali liquor in a parallel flow manner at a preset temperature and pH value to construct a core phase, then adding a second salt solution, an auxiliary agent solution and the alkali liquor to form a coating layer, and heating for aging; washing, drying and roasting to prepare a catalyst precursor; preparing a hydrophobic component solution and an oxide precursor solution, mixing and hydrolyzing to obtain a composite hydrophobic solution; and dipping a precursor in the solution, and drying to obtain the product. The problem of water-induced inactivation of a traditional catalyst is solved, the CO2 conversion rate and methanol selectivity are improved, the inactivation rate is reduced, and the process is suitable for industrial production.

The present invention relates to a method for synthesizing a novel primary amide using dioxazolone as a starting material and adding a copper salt catalyst, and more specifically, to a method for producing an environmentally friendly primary amide derivative with a short reaction time, low reaction temperature, and the generation of harmless carbon dioxide as a byproduct. The present invention provides an efficient method that enables the safety of compounds and low-cost synthesis even in large-scale reactions. Furthermore, it suppresses the use of highly corrosive ammonia, which was required in the conventional synthesis of primary amides, while simultaneously providing more environmentally friendly synthesis conditions through a water-added co-solvent system. Furthermore, the organic synthesis method of primary amides according to the present invention can be widely applied to the synthesis of pharmaceutical intermediates, natural products, and low-molecular-weight new drug candidate compounds.

The application discloses a preparation method of a high-selectivity hydrogen peroxide production catalytic electrode, and the method comprises the following steps: (1) dissolving a soluble copper salt and a soluble zinc salt in water to prepare a mixed precursor solution containing Cu2+ and Zn2+ with different proportions; (2) adding a precipitant solution to the mixed precursor solution obtained in the step (1) under stirring, controlling the pH range of the reaction system, regulating the local coordination environment, the local electronic structure, especially the microenvironment of the lattice hydroxyl of the basic copper carbonate, and making the system generate a zinc-modified basic copper carbonate precipitate through aging crystallization, and then performing solid-liquid separation, washing and drying treatment to obtain a zinc-modified basic copper carbonate material; and (3) dispersing the zinc-modified basic copper carbonate material obtained in the step (2) into a solvent to form a catalyst slurry, and loading the catalyst slurry on the surface of a conductive substrate, and then performing drying to obtain a supported zinc-modified basic copper carbonate catalytic electrode. The reasonable lattice hydroxyl structure of the obtained material can be used for electrochemical oxidation of water to prepare hydrogen peroxide in a sulfate electrolyte system, and the material has good hydrogen peroxide production capacity and faradic efficiency.

The invention discloses a tellurium-based nano material capable of efficiently inducing copper death as well as a preparation method and application of the tellurium-based nano material. The preparation method comprises the following steps: by taking water as a medium, mixing soluble copper salt and a sulfydryl-containing compound, and stirring to react, so as to obtain a Cu-S2 solution; dropwise adding the Cu-S2 solution into the TeO2 nano-carrier solution, and carrying out stirring reaction; and after the reaction is finished, carrying out solid-liquid separation, taking the solid, and resuspending with methanol to obtain the TeO2 coated Cu-S2 nano material. The preparation method is simple and rapid, large-scale production can be achieved, and the obtained TeO2 coated Cu-S2 nano material can efficiently induce cancer cells to generate copper death, is effective to various cancer cells and has potential clinical transformation application prospects.

This invention belongs to the field of biomedical materials technology, specifically disclosing a composite material for promoting the repair of soft tissue defects in the maxillofacial region and its preparation method. The composite material comprises the following raw materials: oxidized hyaluronic acid, carboxymethyl chitosan, dopamine-functionalized hydroxyapatite nanoparticles, strontium salt, copper salt, glycerol, and deionized water. The preparation method includes: firstly, strontium salt and copper salt are hierarchically loaded onto the surface of dopamine-functionalized hydroxyapatite nanoparticles via a dual mechanism of "lattice substitution-surface coordination," and then, together with oxidized hyaluronic acid and carboxymethyl chitosan, construct a "dynamic covalent-hydrogen bond-coordination bond" triple synergistic network through Schiff base reaction, hydrogen bonding, and coordination bonds. This invention solves the technical problems of poor wet surface adhesion, low mechanical strength, single function, and easy burst release of ions in existing repair materials, exhibiting excellent effects such as sequential antibacterial and repair-promoting properties, high adhesion strength, and long-lasting sustained release.

The application belongs to the field of electrochemical catalyst and energy technology, and particularly relates to a catalyst for electrocatalytic C-N coupling, especially a S-doped Cu-Co catalyst for electrocatalytic C-N coupling, and further discloses a preparation method and application thereof. The S-doped Cu-Co catalyst utilizes copper salt and cobalt salt to form a Cu-Co material and serve as an active site of a reaction, and meanwhile, is synergistically regulated by S atoms. The S-doped Cu-Co catalyst has the advantages of structural stability, high electrolysis activity and long service life in the process of electrolytic catalysis of CO2, and is especially suitable for a process of preparing amides by electrocatalytic C-N coupling of carbon-containing small molecules and nitrogen-containing small molecules.

A Cu x The preparation method of O / BNAD composite photocatalyst adopts a soft template method. Porous h-BN (p-BNNS) is prepared by high-temperature calcination of the precursor. Under low-temperature conditions, a diazotization reaction is used to generate p-BNNS diazonium salt, which is then coupled with an aromatic amine to obtain a porous boron nitride azo compound (p-BNAD) covalently linked by -N=N-azo bonds. Finally, copper oxide / boron azo nitride (Cu) is prepared by vacuum impregnation with copper salt. x This invention utilizes an O / BNAD composite photocatalyst for the efficient reduction of Cr(VI) and the inhibition of bacteria. Under simulated sunlight, Cu... x O / BNAD can effectively reduce Cr(VI) ions, with an apparent kinetic constant of 0.071 min. ‑1 The conversion rate is as high as 88.67%. Under visible light irradiation, it can effectively inhibit the reproduction of Gram bacteria, with an antibacterial rate of 98.0-99.9%.

The invention discloses a composite flame retardant, a preparation method and application of the composite flame retardant in a thermoplastic resin composite material, and the preparation method of the composite flame retardant comprises the following steps: fully mixing alkali metal chromate, soluble copper salt, soluble aluminum salt, an organic solvent and deionized water to obtain a mixed solution; cooling, washing and filtering the mixed solution to obtain a precursor CuAl2 (CrO4) 4; the precursor CuAl2 (CrO4) 4 is calcined at the temperature of 720-800 DEG C for 20-24 h, and a calcined product is obtained; and uniformly mixing the calcined product with decabromodiphenyl ethane to prepare the composite flame retardant. The composite flame retardant has excellent flame retardant property, and the flame retardant effect of the thermoplastic resin composite material can be remarkably improved, so that the application requirements of the thermoplastic resin composite material in more fields are met.

The invention belongs to the technical field of organic synthetic chemistry, and particularly relates to a preparation method and medical application of a visible-light-driven bis (trifluoromethyl) selenide compound. The preparation method of the bis (trifluoromethyl) selenide compound comprises the following steps: by taking olefin, trifluoromethylselenotetramethylammonium and bis (trifluoromethylseleno) diselenide as reaction raw materials, stirring and reacting under the conditions of proper temperature and visible light irradiation in the presence of cuprous salt to obtain the bis (trifluoromethyl) selenide compound. The method has the advantages of mild reaction conditions, simplicity and convenience in operation, good functional group compatibility and the like. In addition, the bis (trifluoromethyl) selenide compound provided by the invention shows good potential in the aspect of anticonvulsion, and has the prospect of being further developed into anticonvulsion drugs.

The application discloses a preparation method of an alumina-supported copper-cobalt bimetallic catalyst. The preparation method comprises the following steps: (1) a certain amount of cobalt salt, copper salt, aluminum salt, urea and ammonium fluoride are dissolved in an alcohol solvent to obtain a precursor through a solvothermal reaction; and (2) the precursor is reduced by hydrogen to obtain the alumina-supported copper-cobalt bimetallic catalyst. Compared with the prior art, the copper-cobalt bimetallic catalyst prepared by the method has excellent catalytic activity on the reaction of CO2 hydrogenation to ethanol, and can significantly improve the selectivity of ethanol product in the reaction.

The present application relates to a kind of micro CO efficient removal adsorbent and its preparation and application, the preparation method includes the following steps: (1) active carbon powder, active component A, inorganic clay and dispersing agent are placed in ball mill and are uniformly ground, and mixture material is obtained;(2) active component B and the water solution of reducing agent are atomized and sprayed into the mixture material, then glue is added, and wet material is obtained;(3) wet material is extruded into shape by template, after heat reduction, after drying, calcination, CO removal adsorbent is obtained, i.e. target product;Active component A is monovalent copper salt, and active component B is the mixture of lanthanum chloride and at least one of cerium chloride or yttrium chloride.The strength and adsorption capacity of the CO removal adsorbent of the present application are increased by more than 30% and 25% respectively, the strength is ≥40N / cm, the wear is ≤1.5wt%, the CO adsorption capacity is ≥35ml / g (40℃), the removal precision can reach below 0.01ppm, suitable for the efficient purification of trace CO in hydrogen, nitrogen and other raw gas.

The utility model relates to the technical field of copper salt production devices, in particular to a crushing and packaging device for copper salt production, which comprises a feed hopper, a plurality of sharp plates for crushing copper salt are fixedly mounted at two ends of a pressing plate, and a power mechanism comprises a motor, a gear I, a gear II, a rope and a spring. A filter plate used for screening materials is fixedly installed in the feeding hopper, a motor provides rotating power for a first gear, a second gear is meshed with the first gear, the first gear and the second gear form a transmission mechanism, winding and releasing of a rope are achieved through gear transmission, and then movement of a pressing plate is controlled. And the pressing plate reciprocates under the action of the gear, the rope and the spring to crush materials stacked on the filter plate, so that copper salt particles meet the set particle size standard, caked copper salt is prevented from blocking a conveying pipeline and a feeding port of packaging equipment, and the situation that the production efficiency is affected due to interruption of the packaging process is avoided.

This invention provides a carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst, its preparation method, and its application, belonging to the field of photocatalytic materials technology. First, a carbon nitride precursor and a carboxylating agent are mixed in a solvent to undergo a carboxylation reaction, yielding carboxylated graphitic carbon nitride. Then, the carboxylated graphitic carbon nitride is mixed with a copper salt solution for a preliminary reaction, yielding copper-supported C3N4-C powder. Finally, the copper-supported C3N4-C powder and 1,3,5-pyromellitic acid are dispersed in a solvent for a hydrothermal reaction to obtain the carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst. This invention, through directional assembly and growth, ultimately obtains a composite photocatalyst with tight interfacial bonding, stable structure, and high photogenerated charge separation efficiency.