124 results about "Copper(I) oxide" patented technology

The invention relates to composition and preparation of a thick-film copper conductor sintered at different temperatures and different atmospheres, and belongs to the field of chemical preparation. Comprising the following steps: mixing 65-85% of copper powder, 3.0%-15.0% of glass, 15.0%-35.0% of an organic adhesive and 0.1-1.5% of an additive which is one or more of titanium trioxide or stannous oxide, cuprous oxide and copper oxide, rolling into slurry, and sintering at 850-950 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The medium-temperature copper paste is prepared by the following steps: mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic adhesive and 0.2-1.6% of an additive which is one or more of titanium sesquioxide or stannous oxide, cuprous oxide and copper oxide, rolling into paste, and sintering at 450-650 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The low-temperature copper paste is prepared by mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic binder and 0.1-2.0% of an additive which can be one or more of elemental elements of magnesium, zinc, boron and phosphorus or one or more of nickel phosphide, nickel boride, copper phosphide and copper oxide, rolling the mixture into paste, and sintering the paste in air at 250-350 DEG C to obtain a copper conductor.

The invention discloses a method for synthesizing a Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst by adopting a solvothermal method, and belongs to the technical field of catalysts. The preparation method comprises the following steps: preparing copper molybdenum sulfide by using cuprous oxide as a template, synthesizing copper molybdenum sulfide with high purity and good crystallinity by combining a solvothermal method, preparing manganese cadmium sulfide by using manganese acetate, cadmium acetate, sodium hydroxide and thioacetamide as raw materials, adding copper molybdenum sulfide before a hydrothermal reaction, successfully modifying the manganese cadmium sulfide by constructing a heterojunction, and preparing the copper molybdenum sulfide modified manganese cadmium sulfide. The Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst is synthesized, and the photocatalytic hydrogen production rate of the cadmium manganese sulfide is improved. Moreover, the hydrogen production rate of the Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst prepared by the invention can reach 8233 mu mol / (g.h), which is 2.08 times of the hydrogen production rate of pure cadmium manganese sulfide, and 1.24 times of the hydrogen production rate of cadmium manganese sulfide loaded with 1% platinum.

The invention relates to the technical field of photocatalysis, and provides a preparation method of a copper-cuprous oxide-copper bismuthate ternary complex, which comprises the following steps: adding sodium bismuthate dihydrate, copper sulfate and sodium sulfite into a hydrothermal reaction kettle containing distilled water to obtain a solid-liquid mixture; and the solid-liquid mixture generates the copper-cuprous oxide-copper bismuthate ternary compound under a hydrothermal condition through a synergistic effect of a heterogeneous interface in-situ oxidation-reduction reaction of sodium bismuthate and a sodium sulfite solution and a homogeneous oxidation-reduction reaction of a copper sulfate solution and the sodium sulfite solution. The preparation method has the advantages that the elemental copper-cuprous oxide-copper bismuthate ternary compound is prepared by a one-pot method through cooperation of the out-phase interface in-situ oxidation-reduction reaction and the homogeneous oxidation-reduction reaction, and the preparation method is simple in preparation step, convenient to operate and easy to quantitatively control.

The invention discloses a recyclable porous copper / cuprous oxide filamentous catalytic material and also discloses a preparation method of the catalytic material, and the preparation method comprises the following steps: taking a copper wire and pre-treating the copper wire to remove surface oxides; performing zinc electrodeposition treatment on the copper wire to obtain a galvanized copper wire; carrying out solution treatment on the galvanized copper wire to obtain a porous copper precursor; then, the porous copper precursor is subjected to corrosion treatment, zinc in a plating layer is removed, and a porous copper catalyst carrier is obtained; and putting the porous copper catalyst carrier into a tubular furnace for high-temperature oxidation to obtain the Cu / Cu2O filamentous catalytic material. The catalytic material provided by the invention has the characteristics of recoverability and good catalytic performance. According to the method, cuprous oxide is generated by adopting a one-step high-temperature thermal oxidation method, and regulation and control parameters are few and easy to control in the process.

The invention discloses a preparation method of copper-based composite powder with high infrared laser absorptivity and a reaction device of the copper-based composite powder, and belongs to the technical field of metal additive manufacturing. The preparation method of the copper-based composite powder comprises the following steps that copper powder is subjected to acid pickling pretreatment, Cu2O-coated Cu powder is prepared through air suspension dynamic etching, the Cu2O-coated Cu powder is purified, and the prepared composite powder is of a core-shell structure and comprises a copper core and a cuprous oxide modified shell wrapping the surface of the copper core; by means of the structure, the absorptivity of the copper powder to near-infrared laser of 1064 nm and the like can be remarkably improved to 30% or above, and therefore the problems that pure copper is poor in melting and multiple in forming defect due to high reflectivity in laser additive manufacturing are effectively solved. The composite powder can be directly used for existing selective laser melting or directional energy deposition equipment, has great significance in achieving high-density copper part forming under medium power, and is convenient to prepare, low in cost and high in practicability.

The invention belongs to the technical field of electro-catalytic materials and carbon dioxide emission reduction and resource utilization, and particularly relates to an amino acid modified copper-based catalyst and a preparation method and application thereof. According to the catalyst, the surface of cuprous oxide with an orthorhombic-section semi-cube shape is modified through L-cysteine, and a composite structure with a special interface microenvironment is formed. Sulfydryl in L-cysteine and copper species on the surface of cuprous oxide can form a strong coordination effect, water decomposition and * CO protonation are promoted, the surface structure is stabilized, asymmetric coupling is facilitated, meanwhile, amino can provide an electron-rich environment, capture of carbon dioxide is enhanced, and the selectivity and stability of ethylene prepared through electro-catalysis carbon dioxide reduction are cooperatively regulated and controlled.

The invention discloses a copper oxide / cuprous oxide heterogeneous nano-material with chiral morphology and a preparation method thereof, and the method comprises the following steps: 1, mixing a copper salt aqueous solution and a surfactant aqueous solution to obtain a mixed solution A, taking a chiral ligand aqueous solution to add into the mixed solution A under a stirring state, and stirring at room temperature to obtain a copper oxide / cuprous oxide heterogeneous nano-material; a copper ion reaction precursor solution is obtained; and 2, adding a sodium hydroxide aqueous solution into the copper ion reaction precursor solution, stirring at room temperature to obtain a mixed solution B, transferring the mixed solution B into a hydrothermal reaction kettle, putting the hydrothermal reaction kettle into a drying oven, reacting at 120-160 DEG C for 2-6 hours, after the reaction is finished, centrifugally separating out a precipitate, and sequentially washing and drying in vacuum to obtain the copper ion catalyst. The copper oxide / cuprous oxide heterogeneous nano material with chiral morphology is obtained. The preparation method is simple, low in cost and easy to implement, and the obtained chiral copper oxide / cuprous oxide heterogeneous nano material has good structural stability and crystallinity.

The invention relates to the technical field of cuprous oxide particle testing, and discloses a method for characterizing cuprous oxide particles in a fine copper wire, which comprises the following steps: S1, fixing the fine copper wire on a copper sheet by using conductive silver paste, putting the copper sheet into a silica gel square mold, filling a metallographic phase cold inlay, and standing for 30 minutes to obtain a cured sample; s2, putting the cured sample obtained in the step S1 into a cross section cutting sample table of a three-ion-beam cutting instrument, selecting a cross section mode, setting ion gun voltage and ion beam cutting time, and starting a cutting program; and S3, transferring the sample obtained in the step S2 into a scanning electron microscope, selecting an electron channel contrast imaging mode, and setting acceleration voltage, current, working distance and magnification times to obtain a high-resolution scanning electron microscope image of the cross section of the fine copper wire. And key information such as the size, the morphology and the distribution condition of cuprous oxide particles and the interface bonding condition of the cuprous oxide particles and a copper matrix is obtained from the cuprous oxide particles. Therefore, a basis is provided for formulating a reasonable fine copper wire drawing process and a bus continuous casting and rolling process.

The invention provides a composite antifouling system coating as well as a use method and application thereof. The coating sequentially comprises a bottom layer, a copper-containing middle layer and a surface layer in the direction from near to far away from a base material, wherein the copper-containing middle layer comprises 20-30 parts of self-polishing acrylic silicon resin, 5-10 parts of lime rosin, 8-12 parts of zinc oxide, 30-50 parts of cuprous oxide, 2-3 parts of a compound antifouling agent, 0.5-1 part of a thixotropic agent and a first diluent. The surface layer is prepared from 30 to 35 parts of caprolactone and lactic acid grafted linear polyester, 5 to 10 parts of highly hydrolyzed N-(hydroxymethyl) acrylamide (NMA) modified acrylic resin, 15 to 20 parts of copper-free organic antifouling agent, 5 to 12 parts of polytetrafluoroethylene micro powder, 2 to 3 parts of dispersing agent and second diluent. The high-hydrolysis copper-free surface layer forms an isolation barrier, so that the copper-containing middle layer is prevented from being in direct contact with air, and the problem that the antifouling efficiency is reduced due to the fact that water is not discharged for a long time after coating is solved; the stable hydrolysis rate of the surface layer resin can ensure the continuous release of the organic antifouling agent, and the copper-containing intermediate layer can provide deep antifouling guarantee and synergistically realize long-acting antifouling.

The invention provides a preparation method of a cuprous oxide / cobaltosic oxide heterojunction composite material. The preparation method comprises the following steps: S1) growing cobaltous hydroxide on the surface of a carrier in situ; s2) calcining the cobaltous hydroxide, so as to obtain cobaltosic oxide; and S3) carrying out electroreduction deposition on the cobaltosic oxide in a mixed solution containing a copper source and an electrolyte to obtain the cuprous oxide / cobaltosic oxide heterojunction composite material. In the reduction reaction of electro-catalysis of 5-hydroxymethylfurfural, the prepared composite material serves as a catalyst, cuprous oxide serves as a main catalytic site for catalyzing reduction of HMF into DHMF, the capacity of generating active hydrogen through water dissociation is promoted due to existence of a cobaltosic oxide substrate, and therefore the selectivity of the product DHMF is improved; meanwhile, the composite material prepared by the invention shows excellent electrochemical catalysis performance and good cycling stability, and has a great application prospect in an HMF electroreduction reaction.

To provide cuprous oxide powder with a relatively high packed bulk density and a production method for the cuprous oxide powder.SOLUTION: The cuprous oxide powder contains sulfur (S) with a content of less than 140 mass ppm and chlorine (Cl) with a content of less than 1000 mass ppm.SELECTED DRAWING: None

The invention discloses a layered nano-porous copper loaded cuprous oxide / copper oxide nanowire composite material as well as a preparation method and application thereof. The material is a thin strip and comprises an amorphous substrate thin strip, multiple layers of nano-porous copper covering an amorphous substrate and a cuprous oxide / copper oxide two-component heterojunction nanowire loaded on the surface of the nano-porous copper. The preparation method comprises the following steps: firstly, freely dealloying an amorphous ribbon, and adding PVP (Polyvinyl Pyrrolidone) into dealloying corrosive liquid to generate layered nano-porous copper; then, copper hydroxide nanowires grow on the surface of each layer of nano-porous copper in situ through the anodic oxidation technology; and finally, converting the copper hydroxide into cuprous oxide / copper oxide nanowires with different component proportions by regulating and controlling the temperature by adopting a heat treatment process. The prepared composite material has a larger specific surface area and more active sites, and has unique structure and performance advantages in the field of photocatalytic degradation of organic dyes.

The invention discloses a composite cathode material integrating electrocatalysis and ozone oxidation functions, a preparation method and application. The composite cathode material is composed of oxidized carbon nanotubes, cuprous oxide and copper oxide. The copper loading capacity of the composite cathode material is 1-10wt.%; the diameter of the oxidized carbon nanotube is 5 to 10 nm; the mass ratio of the oxidized carbon nanotubes to the cuprous oxide to the copper oxide is (298-27): (3.0-2.5): (0-1). A composite cathode material integrating electrocatalysis and ozone oxidation functions is elaborately designed and prepared and is applied to an electrocatalytic ozone coupling system, and continuous and efficient attack on antibiotic molecules and degradation intermediates thereof is realized by utilizing multiple synergistic effects among all components of the material and in the electrocatalytic ozone process, so that the electrochemical performance of the composite cathode material is improved. Therefore, the technical bottleneck of low TOC removal rate in the traditional advanced oxidation process is broken through, and a new technical approach is provided for thoroughly eliminating the antibiotic risk in the water environment.

The invention discloses a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process, and belongs to the technical field of purified copper slag. The invention relates to a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process. The method mainly comprises the following steps: acid leaching and impurity removal; the pre-leached filter residues are mixed with dilute sulphuric acid, air is introduced to serve as an oxidizing agent for oxidation leaching, after leaching, the pH is adjusted to 4.0-5.0 through CaCO3, and copper-containing leaching liquid is obtained through filtering; adding dextrose monohydrate into the copper-containing leachate, and adjusting the pH value by using NaOH; according to the method, through the closed-loop process of acid presoaking impurity removal, air oxidation leaching, glucose reduction and cuprous oxide Cl <-> removal, conversion from harmless treatment to resource high-value utilization of the low-grade copper slag is achieved, air is used for replacing KMnO4, MnO2 and other chemical oxidants, the cost is reduced, no harmful by-product exists, the green metallurgy requirement is met, and the method is suitable for industrial production. The prepared cuprous oxide is directly used for removing Cl <-> from a supernatant in electrolytic zinc, and the double contradiction of copper slag dilution and high cost of a Cl <-> removing agent in the industry is solved.

The invention discloses a copper cyanoaurate hexagonal sheet loaded cuprous oxide material as well as a preparation method and application thereof. The copper cyanoaurate hexagonal sheet loaded cuprous oxide material comprises a copper cyanoaurate hexagonal sheet and cuprous oxide loaded on the copper cyanoaurate hexagonal sheet. According to the preparation method, copper ammonium chloride and potassium cyanoaurate are taken as raw materials, a copper cyanoaurate hexagonal sheet is prepared by a hydrothermal method, and then cuprous oxide is loaded on the copper cyanoaurate hexagonal sheet, so that the copper cyanoaurate hexagonal sheet loaded cuprous oxide material is obtained. The invention provides application of the copper cyanoaurate hexagonal sheet loaded cuprous oxide material as a catalyst for electrocatalytic reduction of carbon dioxide, and provides a gas diffusion electrode, and the catalyst in the gas diffusion electrode is the copper cyanoaurate hexagonal sheet loaded cuprous oxide material. The preparation process is simple and environment-friendly; the prepared material has higher ethylene selectivity and stability in the reaction of electrocatalytic reduction of carbon dioxide.

The invention provides a nanopore dispersion strengthened copper material and a preparation method thereof. The material is obtained through a two-step method of firstly oxidizing and then reducing: firstly, adding an oxygen element into copper, namely preparing a precursor with a Cu-Cu2O two-phase structure from copper and copper oxide, and adopting a powder coating-laser powder bed melting or electric arc melting-solidification process; and then performing thermal reduction in a reducing atmosphere, so that cuprous oxide in the precursor is reduced and converted into closed nanopores in situ. The obtained material is composed of a copper matrix with micron-sized crystal grains and nano-sized holes which are uniformly and dispersedly distributed. According to the method, the atomic ratio of Cu to O, the solidification cooling speed and the reduction temperature / time are adjusted, and the volume ratio of the Cu2O phase in the precursor is adjusted through high-temperature annealing aftertreatment, so that the porosity and the pore diameter are adjusted and controlled. According to the method, heterogeneous elements are not introduced, the process is universal, the cost is friendly, and the obtained material has high strength, high conductivity and excellent high-temperature structural stability.

The invention provides a powder metallurgy product with improved friction performance and a preparation method thereof, and relates to the technical field of powder metallurgy. The powder metallurgy product for improving the friction performance comprises the following raw materials in parts by weight: 20-25 parts of copper powder, 3-7 parts of tin powder, 5-7 parts of aluminum powder, 3-7 parts of cuprous oxide, 12-13 parts of graphite and 13-15 parts of molybdenum disulfide. Diffusion bonding among powder particles is enhanced by applying pulse current in the pressure forming process, the density is improved, the strength distribution of metallurgical products is uniform, and Joule heating and diffusion bonding among the powder particles are promoted by applying pulse current in the sintering process and combining with mechanical pressure. Local high temperature (plasma discharge effect) is generated at a particle contact point, rapid sintering is promoted, the whole process can be completed within several minutes to dozens of minutes, the sintering temperature is reduced, the sintering time is greatly shortened, and the preparation efficiency is improved.

The invention discloses a solder-free welding joint manufacturing method. The method comprises the following steps: S1, carrying out pretreatment on the copper surfaces of a plurality of sections of superconducting strips to be welded by adopting a soldering flux; the auger parameter alpha'of the surface of the pretreated superconducting tape is 1851 + / -0.5 eV; s2, laminating the pretreated surfaces of the superconducting tape in a face-to-face manner; and S3, the required pressure and temperature are set for hot pressing welding. According to the method, the copper oxide and the cuprous oxide on the copper surface of the superconducting strip are pretreated and removed by using the specific soldering flux, so that most of copper elements (after surface residues are removed) on the surface of the superconducting strip exist in a copper elementary substance form during welding, and stable copper connection is formed on the surfaces of the butted superconducting strips; and finally, the resistance is as low as 1.5 n omega under the condition of 10cm solder-free lap joint length.

The invention discloses preparation and application of a multi-site copper-based nanocrystal loaded noble metal monatomic catalyst, which comprises the following steps: dispersing copper-based precursors such as copper, copper oxide, cuprous oxide, copper sulfide and the like in cyclohexane to obtain a precursor dispersion liquid, stirring and heating to 150-300 DEG C, injecting a noble metal salt solution, reacting for 20-60 minutes, cleaning, and drying to obtain the multi-site copper-based nanocrystal loaded noble metal monatomic catalyst. The multi-site copper-based nanocrystal loaded noble metal monatomic catalyst dispersed in cyclohexane is obtained, noble metal is loaded on copper-based nanocrystals in a monatomic form, and the catalyst has relatively high electro-catalytic activity and ethylene selectivity and can be used for preparing hydrocarbon products through electrochemical reduction of carbon dioxide.

The present invention discloses a carbon dioxide electrocatalytic material with an optimized interface by a reducing atmosphere, its preparation method and application. The preparation method of the electrocatalytic material is as follows: during the hydrothermal synthesis of cuprous oxide, the flow rate of the introduced reducing atmosphere (one or more of CO, H₂, and NH₃ gases) is regulated to obtain a copper-based electrocatalytic material with an optimized interface. The copper-based electrocatalyst with an optimized interface by the reducing atmosphere provided by the present invention exhibits excellent performance in the selectivity of electrocatalytically converting CO₂ to C₂H₄, can inhibit the C₁ pathway and HER of CO₂RR, and is beneficial to the production of C₂⁺ products, while improving the selectivity and Faraday efficiency of C₂H₄.

The invention belongs to the technical field of electrochemical electrode materials, and particularly relates to a multilevel structure bismuth oxide-cuprous oxide composite electrode and a preparation method and application thereof.The preparation method comprises the following steps that 1, nano-copper powder and a polymer binder are added into an organic solvent to be mixed, and a porous copper substrate electrode is obtained through stirring, casting, drying and cutting; (2) taking the porous copper substrate electrode as a working electrode, carrying out constant-current anodic oxidation in an alkaline solution, and carrying out in-situ growth to form a Cu (OH) 2 nanowire; (3) under the protection of inert gas, carrying out heat treatment on the Cu (OH) 2 nanowire to convert the Cu (OH) 2 nanowire into Cu2O, and coating a conductive substrate with the Cu2O to form a Cu2O electrode; and (4) performing constant-potential electrodeposition in an electrolyte containing Bi < 3 + > by taking the Cu2O electrode as a working electrode to obtain the bismuth oxide-cuprous oxide composite electrode. Bi2O3 is deposited on a Cu2O substrate, and an interface synergistic effect is generated.

The invention discloses a preparation method of monodisperse high-crystallization copper powder, and belongs to the technical field of metal powder preparation. The method is used for solving the technical problem of how to regulate and control the process of synthesizing cuprous oxide powder and copper powder so as to improve the dispersity and crystallinity of the synthesized copper powder when the copper powder is synthesized in the prior art. A preparation method of monodisperse high-crystallization copper powder comprises the following steps that cuprous oxide powder is added into deionized water to be evenly mixed, and a cuprous oxide mixture is obtained; ascorbic acid and chelating resin are added into deionized water, and complexing liquid is prepared; and blending the cuprous oxide mixture and the complexing solution, then carrying out heating reaction, and filtering to obtain copper powder particles. Wherein the cuprous oxide powder is prepared by reaction of copper nitrate, gelatin and hexadecyl trimethyl ammonium bromide. Through adsorption of the template agent and the chelate resin, the copper powder which is regular in morphology, high in crystallinity and uniform in dispersion is prepared.

The present invention relates to the technical field of electrocatalytic electrode materials, specifically to a metal-loaded three-dimensional copper-based catalyst, its preparation method and application. In the present invention, copper foam is used as the substrate. First, the copper foam is immersed in a mixed solution containing ammonium persulfate and sodium hydroxide, and then taken out. By controlling the drying conditions, while obtaining Cu(OH)2 nanowires on the copper foam, partial dehydration reduction of Cu(OH)2 is achieved to obtain reducible cuprous oxide active sites. Then, cuprous oxide is reacted with metal ions to obtain a metal-loaded three-dimensional copper-based catalyst. The present invention realizes the composite of multiple metal elements and Cu(OH)2 under normal temperature and pressure, overcomes the technical defects existing in the prior art of electrochemical deposition method and high-temperature sintering method, and the obtained metal-loaded three-dimensional copper-based catalyst has non-aggregated metal particles, has the characteristics of efficient mass transfer and charge transfer, and can effectively improve the application efficiency of the metal-loaded three-dimensional copper-based catalyst in electrocatalysis.

The present application relates to the technical field of nano new material preparation, in particular to a kind of antibacterial flame-retardant multifunctional cuprous oxide / sb2o3 nano material and its preparation method.The method of the present application is characterized by using electrostatic adsorption principle, copper oxide is loaded to the surface of sb2o3, and copper atom will partially replace antimony atom, and Cu-O-Sb binding bond is formed by electron transfer, to prepare cuprous oxide / sb2o3 nano material.The cuprous oxide / sb2o3 nano material prepared by the method of the present application has high purity, good dispersibility, stable structure and excellent antibacterial performance, and the detection of escherichia coli and staphylococcus aureus antibacterial rate is all >99%, the flame-retardant effect is remarkable, and the combustion limited oxygen index is increased by about 25%, which can be applied to the fields of textiles, plastic products and coatings, and is suitable for large-scale industrial production and popularization.

This invention discloses a method for synthesizing Mn using a solvothermal method. 0.43 Cd 0.57 This invention relates to a method for producing S / Cu2MoS4 photocatalysts, belonging to the field of catalyst technology. First, copper molybdenum sulfide is prepared using cuprous oxide as a template. A solvothermal method is then used to synthesize copper molybdenum sulfide with high purity and good crystallinity. Next, manganese cadmium sulfide is prepared using manganese acetate, cadmium acetate, sodium hydroxide, and thioacetamide as raw materials. Before the hydrothermal reaction, copper molybdenum sulfide is added, and manganese cadmium sulfide is successfully modified by constructing a heterojunction, thus synthesizing Mn. 0.43 Cd 0.57 The S / Cu2MoS4 photocatalyst improved the photocatalytic hydrogen production rate of manganese cadmium sulfide. Furthermore, the Mn prepared in this invention... 0.43 Cd 0.57 The S / Cu2MoS4 photocatalyst can produce hydrogen at a rate of 8233 μmol / (g·h), which is 2.08 times that of pure manganese cadmium sulfide and 1.24 times that of manganese cadmium sulfide loaded with 1% platinum.

The invention discloses low-copper environment-friendly self-polishing antifouling paint and a preparation method thereof. The antifouling paint is prepared from modified zinc acrylate resin, rosin, modified cuprous oxide, zinc pyrithione, zinc oxide, a reinforcing blending agent, a multifunctional additive, organic silicon resin, a solvent, barium sulfate, calcium carbonate, a dispersing agent, a flatting agent and chlorinated paraffin. The low-copper environment-friendly self-polishing antifouling paint disclosed by the invention has excellent antifouling efficiency, good adhesive force and stability and excellent mechanical durability and chemical resistance; the antifouling paint has wide application prospects in the fields of ocean engineering, port facilities, aquaculture net cages and the like, the maintenance cost can be remarkably reduced, and the service life of equipment is prolonged.

The application relates to the technical field of purification devices, in particular to a purification and recovery device for ferroelectric flocculation sewage and a purification method thereof. The device comprises a cylinder, a reaction zone, an alkalization zone, a mixing zone and an aeration zone are sequentially arranged in the cylinder from top to bottom and are mutually separated, the reaction zone and the alkalization zone are in communication, a first valve is arranged at the communication position of the reaction zone and the alkalization zone, when in use, a first electrode group and sodium sulfate are used to build an environment of oxygen deficiency and alkalinity in the reaction zone, and cuprous oxide and iron hydroxide flocculation precipitate are generated when the complex is broken; a second electrode group and sodium sulfate in the alkalization zone enhance the alkalinity, free monovalent copper in water is completely combined into cuprous oxide precipitate, free copper ions and precipitate are generated in the aeration zone, an electromagnet attracts the ferromagnetic precipitate, and finally, free copper ions are adsorbed by electrodes in an electric adsorption box, the precipitates after reaction in the zones are transferred by gravity and are independently treated, the cost is low, and the efficiency is high.

The invention belongs to the field of resource recovery treatment, and discloses a method for preparing copper oxide by synergistically recovering waste etching liquid and waste circuit board crude copper powder, which comprises the following steps: adding the waste circuit board crude copper powder and a leaching complexing agent water-soluble chlorine salt into the waste etching liquid, stirring, leaching, filtering and separating to obtain a copper-chlorine complex solution; adding a reducing agent ascorbic acid into the copper chloride complex solution for reaction, filtering and separating to obtain CuCl precipitate; uniformly mixing the CuCl precipitate with auxiliary dechlorination salt, performing controlled atmosphere roasting, and washing a roasted product to obtain copper oxide or cuprous oxide; the auxiliary dechlorination salt is at least one of sodium carbonate, sodium bicarbonate and sodium hydroxide; wherein when the roasting atmosphere is an oxidizing atmosphere, the roasted product is washed with water after roasting to obtain copper oxide; and when the roasting atmosphere is inert atmosphere, washing the roasted product after roasting to obtain cuprous oxide. According to the method, the coarse copper powder of the waste circuit board and the etching waste liquid are subjected to cooperative treatment, and harmless treatment and resource recycling of the two kinds of copper-containing waste are achieved at the same time.

The invention discloses a high-density antioxidant MLCC copper terminal electrode slurry and a preparation method thereof, and relates to the technical field of novel coatings. The invention relates to a high-density antioxidant MLCC (multilayer ceramic capacitor) copper terminal electrode paste, which is composed of the following components in parts by mass: 75.0 to 88.0 parts of conductive copper powder, 3.0 to 8.0 parts of inorganic glass powder, 8.0 to 18.0 parts of organic carrier, 0.5 to 3.0 parts of antioxidant additive, and 0.1 to 1.5 parts of dispersion modifier. The antioxidant additive effectively prevents contact between oxygen and copper, so that conversion of copper powder to copper oxide or cuprous oxide is inhibited from the source, and the problem of oxidation discoloration caused by loss of protection in a high-temperature sintering stage of traditional slurry is solved.

The invention relates to the technical field of metal oxide catalysts, in particular to a preparation method of an amorphous copper-derived copper / cuprous oxide catalyst, which comprises the following steps: weighing CuCl2. 2H2O in a 100mL beaker, adding ethylene glycol, and stirring to obtain a uniform and transparent solution A; adding tannic acid into the solution A, and stirring until the tannic acid is completely dissolved to form a clear and transparent solution B; dropwise adding a NaOH solution into the solution B, and stirring until the color of the solution gradually turns brown from blue to form a solution C; transferring the solution C to a centrifugal tube, and centrifuging to obtain a precipitate; carrying out washing treatment on the precipitate; drying to obtain an amorphous copper oxide; the preparation method comprises the following steps: weighing an amorphous copper oxide, introducing nitrogen as a shielding gas, and generating instantaneous high temperature in a Joule thermal synthesis form to obtain the Cu-Cu2O catalyst with the heterostructure. According to the method, efficient preparation of the copper / cuprous oxide catalyst material is achieved, adsorption to CO2 and intermediates is enhanced, generation of C2 + products is promoted, and the invention further discloses application and testing methods correspondingly.