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

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 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 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 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 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 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 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.

This invention relates to the field of metal materials technology, specifically to a method for preparing highly dispersed ultrafine copper powder in an aqueous system. The preparation method includes the following steps: Step (1) At 20℃-30℃, a copper source and an amine reagent are mixed evenly, deionized water is added and stirred to dissolve, forming a copper-amine complex solution. A dispersant solution is then added and stirred until evenly mixed to obtain a copper source-dispersant mixed solution; Step (2) The copper source-dispersant mixed solution is mixed with an aqueous solution containing an alkaline solution and a reducing agent, and then reacted to obtain a cuprous oxide precursor; Step (3) The cuprous oxide precursor solution is transferred to an oil bath reaction apparatus and stirred continuously. The cuprous oxide undergoes a secondary reduction to generate ultrafine copper powder; After the reaction, the product is washed, centrifuged, and dried to obtain highly dispersed ultrafine copper powder. This method achieves the preparation of ultrafine copper powder with a smooth surface, uniform size, and good dispersibility by dynamically controlling the reaction process with pH, ​​and the production capacity per unit reaction volume is extremely high.

The application discloses a flux for smelting scrap brass particles, and components include 5-40% of sodium carbonate Na2CO3, 10-40% of cryolite Na3AlF6, 10-30% of sodium fluoride NaF, and the rest is charcoal powder and inevitable impurities in terms of weight fraction. NaF can reduce the melting point of furnace ash, melt copper oxide and cuprous oxide, and is used for forming corresponding low-melting fluorinated salt. Carbon C is used for reducing copper oxide and cuprous oxide, destroying the surface layer of copper particles, and the generated Na2O.ZnO has the function of fluffy furnace ash. CuF2 is a hard and brittle substance, and is used for peeling off the copper oxide shell layer. Under the joint action of components, the effect of efficiently improving the copper particle yield is finally realized, and the application is safe and harmless. The application further discloses a preparation method of the flux for smelting scrap brass particles, and the preparation method is simple. The application further discloses a use method of the flux for smelting scrap brass particles, and the use method is convenient.

The invention provides a method for preventing discoloration of a target material copper back plate, the target material copper back plate and a target material assembly, and the method comprises the following steps that the target material copper back plate is sequentially subjected to polishing treatment, first wiping treatment and second wiping treatment, and the discoloration-preventing target material copper back plate is obtained; wherein a wiping agent adopted in the second wiping treatment is air conditioner condensate water with the pH being 5-6. According to the method, the air conditioner condensate water with the pH being 5-6 is adopted for second wiping treatment, a cuprous oxide layer which is uniform in nucleation and high in density can be formed on the surface of the target copper back plate, and therefore the copper back plate can be protected, and the effect of preventing the copper back plate from discoloring is achieved.

The application discloses a preparation method of a hydroxyl copper fluoride / cuprous oxide composite catalyst, which comprises the following steps: dispersing hydroxyl copper fluoride as a copper source in deionized water, and using glucose, hydrazine hydrate or sodium borohydride as a reducing agent to reduce a small amount of cuprous oxide on the surface of the hydroxyl copper fluoride in situ to obtain a target product. The preparation process is simple, and the operability is good. Through the synergistic effect of photocatalysis and a Fenton-like system, the hydroxyl copper fluoride / cuprous oxide composite catalyst has good catalytic performance and cycle stability under visible light irradiation, and can be used for degrading organic pollutants such as antibiotics.

The invention belongs to the field of in-situ electrode catalysis, and discloses a preparation method of a Cu2O-Cu electrode material for HMF hydrogenation reduction. The preparation process is as follows: foamy copper (CF) is used as a copper source and a carrier, the foamy copper (CF) is calcined in a muffle furnace at a specific temperature and then activated under a certain potential, so that an in-situ derived cuprous oxide-copper (Cu2O-Cu) electrode material is synthesized, and the in-situ derived cuprous oxide-copper (Cu2O-Cu) electrode material is used for preparing 2, 5-dimethylolfuran (BHMF) through electro-catalysis hydrogenation reduction of 5-hydroxymethylfurfural (HMF). The preparation method disclosed by the invention has the advantages of simple process, convenience in operation, low cost and the like, the obtained product is high in yield, in the aspect of electro-catalysis HMF reduction, compared with pure CF, the activity of the product is remarkably improved, in addition, the Faraday efficiency of BHMF in five cycles is almost not reduced, and good stability is shown.

A green electrosynthesis method of ammonium formate under a non-noble metal catalytic system comprises the following steps: cleaning copper foam with isopropanol and a hydrochloric acid solution in sequence, then placing the cleaned copper foam in a three-electrode electrolytic tank as a working electrode to obtain copper foam with the surface covered with a light blue precursor film, washing the precursor film with deionized water, and drying the washed precursor film for a long time to obtain the green electrosynthesis method of ammonium formate under a non-noble metal catalytic system. And carrying out heat preservation in a flowing argon atmosphere to obtain the nanowire structure anode electrode consisting of metal copper, copper oxide and cuprous oxide. According to the invention, the anode adopts an in-situ constructed gradient heterojunction nanowire structure, metal Cu provides an excellent electron conduction channel, rapid charge transmission under high current density is ensured, optimal balance is realized in a nitrate eight-electron reduction path through the cathode, and NOI initial adsorption and activation are facilitated.

A formulation comprising particulate matter including nanometric metallic copper particles, at least 10% of the particulate matter being single-crystal metallic copper particles, the particulate matter having an average secondary particle size (d50) within a range of 20 to 200 nanometers, the nanometric metallic copper particles being at least partially covered by at least one dispersant; wherein a concentration ratio of crystalline cuprous oxide to the nanometric metallic copper particles, within the particulate matter, is at most 0.4; wherein a weight ratio of the dispersant to the particulate matter is at most 0.08; the formulation further comprising at least a first solvent, the particulate matter and the solvent forming a dispersion; and wherein at least 2% of the particulate matter are single-crystal metallic copper particles having a triangular morphology.

The application discloses a homogeneous phase synthesis method of copper-based micro-nano materials with controllable phase and morphology, which comprises the following steps: (1) dissolving soluble copper salt in a mixed solvent of ethylene glycol and ethylenediamine, and stirring to obtain a clear homogeneous phase solution; (2) adjusting the adding amount of deionized water in the reaction system to determine the phase of the product as copper or cuprous oxide or a composite material of both; (3) under the determined phase system, adjusting the adding amount of ethylene glycol in the reaction system to control the micro-morphology and exposed crystal face of the product; and (4) performing low-temperature solvothermal reaction under sealed conditions, and obtaining the target product through centrifugation, washing and drying after the reaction is completed. The method has the advantages of simple process, no need of solid precursors and high-temperature calcination in the whole process, mild reaction condition, high product purity, good repeatability and the like, and effectively solves the problem that the prior art is difficult to simultaneously and accurately control the crystal structure and micro-morphology of copper-based materials in the same system.

This invention discloses an electrochemical method for preparing staggered cuprous oxide micron-sized cubes, belonging to the field of electrode material preparation technology. The method utilizes a redox reaction at room temperature as the main synthesis mechanism, using clean copper foam as the copper source. The reaction is carried out in a mixed solution of alkaline solution and persulfate for a certain time. The copper foam intermediate is then sequentially cleaned, vacuum dried, and calcined. Subsequently, in a three-electrode system, the treated copper foam is used as the working electrode and electrochemically treated in a selenite solution to prepare a highly crystalline cuprous oxide material exhibiting a staggered micron-sized cube morphology with a smooth and flat cube surface. When applied to the energy storage field, it achieves a high areal specific capacity even at high current densities, with a maximum areal specific capacity of 1556 mF / cm². 2 This invention is simple to operate, has a short preparation cycle, is energy-saving, efficient, and inexpensive.

The invention discloses a homogeneous synthesis method of a phase and morphology dual-controllable copper-based micro-nano material, which comprises the following steps: (1) dissolving soluble copper salt in a mixed solvent of ethylene glycol and ethylenediamine, and stirring to obtain a clear homogeneous solution; (2) adjusting the addition amount of deionized water in the reaction system to determine that the phase of the product is metal copper or cuprous oxide or a composite material of the metal copper and the cuprous oxide; (3) under the determined phase system, adjusting the addition amount of ethylene glycol in the reaction system so as to regulate and control the microstructure and exposed crystal face of the product; and (4) carrying out low-temperature solvothermal reaction under a sealed condition, and centrifuging, washing and drying after the reaction is finished to obtain a target product. The method is simple in process, does not need to use a solid precursor in the whole process and does not need high-temperature calcination, has the advantages of mild reaction conditions, high product purity, good repeatability and the like, and effectively solves the problem that the crystal structure and the microstructure of the copper-based material are difficult to accurately control in the same system at the same time in the prior art.

The invention discloses a low-temperature oxidation in-situ constructed cuprous oxide / copper oxide heterojunction photoelectric cathode and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing ammonium persulfate and sodium hydroxide into an aqueous solution with a specific concentration, then immersing foamy copper into the aqueous solution to react, then putting the foamy copper after reacting for a period of time into a tubular furnace, and annealing for a certain time in an argon atmosphere to prepare the cuprous oxide photoelectric cathode. And placing the prepared cuprous oxide photoelectric cathode in a drying box for low-temperature oxidation reaction for a certain time to finally prepare the cuprous oxide / copper oxide heterojunction photoelectric cathode, namely Cu2O / CuO. The prepared Cu2O / CuO heterojunction photoelectric cathode shows excellent photoelectrochemical performance, and can be used in the fields of photoelectrochemical water decomposition, solar cells, carbon dioxide reduction and the like.

The application belongs to the technical field of metal materials, and provides a preparation method of monodisperse high-crystalline superfine copper powder. The preparation method comprises the following steps: S1, mixing a copper-containing solution, a dispersant solution and a reducing agent solution to obtain cuprous oxide precursor by reaction; S2, mixing the cuprous oxide precursor solution, the dispersant solution and the reducing agent solution to obtain copper seeds by reaction; and S3, mixing the seeds, deoxygenated water solvent and surface modifier in a protective gas to obtain the monodisperse high-crystalline superfine copper powder by reaction. The preparation method can freely control the particle size of the superfine copper powder, and the prepared superfine copper powder is smooth in surface, uniform in size and excellent in oxidation resistance.

This invention belongs to the field of carbon materials technology, and discloses a high-nuclear-core copper fullerene complex, its preparation method, and its applications. The chemical formula of this high-nuclear-core copper fullerene complex is 6(C7H). 10 N) + [Cu 30 Cl 36 (C 60 (C7H9N) 12 ] 6‑ ·3C7H9N. In this high-nuclearity copper fullerene complex, C 60 Provides a copper source with C=C double bonds, cuprous oxide as a monovalent copper ion, benzylamine, and Cl. ‑ To assist in coordination, high-nuclear copper fullerene complexes can absorb most of the near-infrared light, and the non-radiative transitions of the molecules are greater than the radiative transitions. They have high photothermal conversion efficiency and good electrical conductivity, as well as good photothermal stability, and can be recycled multiple times.

A microelectronic device (100) is provided that includes a copper structure (106) over an electronic component (104). The copper structure (106) comprises copper having an average grain size greater than 1 micron. The copper structure (106) has a corrosion barrier layer (114), the corrosion barrier layer (114) mainly comprising cuprous oxide directly on the copper. The corrosion barrier layer (114) is exposed at the outer surface (116). The microelectronic device (100) is formed by plating copper over a substrate (102) of the microelectronic device (100). The copper structure (106) with the corrosion barrier layer (114) is annealed in a non-reducing environment at a temperature of 125 DEG C to 200 DEG C.