22 results about "Cuprous sulfide" patented technology

The application provides a one-dimensional iron oxide nanorod heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of photoelectrocatalytic water splitting hydrogen production. The composite material provided by the application comprises: one-dimensional iron oxide nanorods, cuprous sulfide nanoparticles loaded on the one-dimensional iron oxide nanorods, and cobalt hydroxide nanosheets coated on the surfaces of the one-dimensional iron oxide nanorods and the cuprous sulfide nanoparticles. On one hand, the Fe2O3 / Cu2S p-n heterojunction is introduced to accelerate the separation of photo-generated carriers in the Fe2O3 nanorod array, and on the other hand, the Co(OH) x The surface OECs accelerate the kinetics process of interfacial water oxidation, the rapid depletion of photo-generated holes further improves the charge separation of the photoanode surface, and the synergistic effect between the Fe2O3 / Cu2S p-n heterojunction and the OECs significantly improves the PEC water splitting performance of the iron oxide nanorod array composite material.

The invention relates to the technical field of thermoelectric materials, and discloses a method for optimizing thermoelectric performance and stability of a copper sulphide material by a macroscopic insulation structure, which comprises the following steps: firstly, preparing Cu1.96S precursor powder by using a mechanical alloying method, then putting the Cu1.96S precursor powder into a graphite grinding tool, and carrying out heat treatment on the Cu1.96S precursor powder to obtain a Cu1.96S / Cu1.96S composite material; meanwhile, macroscopic insulation structure frames are added layer by layer according to different arrangement modes (including up-and-down hole arrangement and left-and-right hole arrangement); and the obtained Cu1. 96S + macroscopic insulation structure frame mixed powder is subjected to spark plasma sintering, and then the block composite material is obtained. The directional migration process of Cu ions in Cu1.96S in the sintering process can be influenced by the added macroscopic insulation structure frame, migration of part of the Cu ions is hindered, the problem that the migration rate and the electrical property of the material are deteriorated due to invalidation caused by the copper ions is solved, the heat conductivity is slightly reduced, and finally the thermoelectric property and the stability are synchronously improved. The problem that an existing cuprous sulfide thermoelectric material is difficult to obtain excellent thermoelectric performance and stability at the same time is solved.

The application provides a kind of copper sulfide@nickel disulfide positive electrode material based on two-dimensional nanosheet wrapping three-dimensional cube and its preparation method and lithium-magnesium dual-ion battery, first using copper salt, alkaline solution and D (+) -glucose in the water bath condition of 70 DEG C, directional formation Cu2O cube.And then, Cu2O and nickel source, sulfur source and surfactant are synthesized by solvothermal synthesis, forming the structure of two-dimensional and three-dimensional combination of NiS2 nanosheet wrapping Cu2S cube.The two-dimensional and three-dimensional combination structure can shorten the particle transmission path, achieve the effect of fast charging and discharging, at the same time, provide more active sites, increase the specific surface area, fully contact with electrolyte, improve the cycle stability of battery.

The present application belongs to the technical field of transformer oil sulfur corrosion protection, and relates to a method for simulating partial discharge of oil-paper insulation under cuprous sulfide deposition, which comprises the following steps: establishing a geometric model of partial discharge of oil-paper insulation by using finite element simulation software COMSOL Multiphysics, and designing cuprous sulfide deposition points; setting physical fields and boundary conditions based on the geometric model, and establishing a fluid dynamics model of transformer oil and a bipolar carrier transport model of insulation paper; performing grid division on the model, and setting initial parameters, solver parameters and voltage excitation; performing transient calculation on the model, and solving the electric field distribution and charge distribution in the partial discharge process of the model. The present application uses the fluid dynamics model and the bipolar carrier model to predict and calculate the severity of partial discharge when cuprous sulfide is deposited at different positions of oil-paper insulation, thereby providing a reference for the influence of cuprous sulfide deposition on the partial discharge characteristics in oil-immersed transformers, and reducing the safety accidents caused by the insulation deterioration of transformers due to cuprous sulfide deposition.

The invention belongs to the technical field of thermoelectric materials, and particularly relates to a light rare earth sulfide modified cuprous sulfide thermoelectric material, a preparation method and application thereof and a hot pressing sintering mold. The preparation method of the light rare earth sulfide modified cuprous sulfide thermoelectric material comprises the following steps: (1) crushing light rare earth sulfide, then adding cuprous sulfide powder, mixing and crushing, and sieving to obtain a solid mixture; (2) carrying out cold press molding treatment on the solid mixture to obtain a molded material block; (3) the formed material block is placed in a hot pressing sintering mold, pre-pressure is applied to the formed material block, and an assembled mold material block is obtained; and (4) placing the assembled mold material block in a quartz tube of a tubular furnace, carrying out hot pressing sintering treatment in an inert atmosphere, and cooling to obtain the light rare earth sulfide modified cuprous sulfide thermoelectric material. The light rare earth sulfide modified cuprous sulfide thermoelectric material disclosed by the invention has both thermal stability and thermoelectric transport characteristics, and is good in comprehensive performance.

The invention provides a preparation method of nano cuprous sulfide and the nano cuprous sulfide, and particularly relates to the technical field of preparation of inorganic nano materials. The preparation method of the nano cuprous sulfide comprises the following steps: adding a sulfur source solution into an acidic complex solution of cuprous ions to obtain an intermediate suspension; then carrying out ultrasonic reaction on the intermediate suspension, continuing to react for 1-2 hours after the system becomes black suspension, then stopping the reaction, and carrying out solid-liquid separation on the system to obtain a precipitate; and finally, washing the precipitate, and carrying out vacuum drying to obtain the nano cuprous sulfide. Wherein a sulfur source in the sulfur source solution comprises a thioamide compound. According to the preparation method, the intermediate suspension serving as a precursor of cuprous sulfide has good stability, formation and conversion of an intermediate are promoted under the ultrasonic action, the particle size of nano cuprous sulfide is effectively controlled, and the nano cuprous sulfide is uniform in distribution, small in size and good in uniformity and dispersity.

The utility model relates to the technical field of test devices, and discloses a cuprous sulfide deposition test device which comprises a main oil tank, electrodes are arranged on the two sides of the upper end in the main oil tank and are a needle electrode and a plate electrode respectively, and sleeves are arranged between the outer portions of the electrodes and the main oil tank; the partition plate is arranged in the middle of the lower end in the main oil tank, and insulation paper is arranged on the two sides, located in the main oil tank, of the exterior of the partition plate; the heating wires are arranged on two sides of the lower end in the main oil tank; the temperature control cabinets are arranged on the two sides outside the main oil tank, and a power-on thermocouple is arranged on the side, close to the heating wire, of the lower end inside the main oil tank; the exhaust hole is formed in one side of the upper end of the main oil tank; and the oil filling ports are arranged on two sides outside the main oil tank. The cuprous sulfide deposition is tested in different environments in the stainless steel oil tank, so that the monitoring of the penetration process of the cuprous sulfide deposition is convenient and rapid.

The invention discloses a process method for deeply removing copper from crude lead by using dangerous solid wastes, and belongs to the technical field of non-ferrous metal metallurgy and resource utilization of the dangerous solid wastes. Dangerous solid waste containing arsenic and sulfur serves as a copper removal agent and is added into molten lead bullion, stirring and smelting are conducted at the temperature of 450-900 DEG C, copper reacts with arsenic and sulfur to generate cuprous sulfide, copper arsenide and other compounds insoluble in lead liquid by means of the preferential affinity of arsenic and sulfur to copper, the compounds float upwards to form a low-density arsenic matte scum layer, and efficient separation of copper is achieved through mechanical slag scattering. The copper content in the lead liquid after copper removal can be reduced to 0.1% or below, and meanwhile harmless treatment of dangerous solid waste and resource recycling of valuable elements are achieved. The method is simple in process, low in cost and high in copper removal efficiency, and has remarkable environmental benefits and economic benefits.

The invention discloses a method for refining and detinning tin-containing crude copper, which comprises the following steps: S1, preparing tin-containing crude copper into powder, adding excessive cuprous sulfide powder, and uniformly mixing to obtain a prefabricated mixture; s2, the prefabricated mixture is put into a vacuum distillation furnace for vacuum distillation, the vacuum distillation vacuum degree is set to be 1-100 Pa, the initial temperature is 627-927 DEG C, the heat preservation time is 3-5 h during the period, the temperature is gradually increased to 1000-1083 DEG C, and heat preservation is conducted for 1-2 h; s3, after heat preservation is completed, heating is conducted till the mixture in the vacuum distillation furnace is completely melted, and heat preservation and standing are conducted. The method adopts a three-section temperature control mode to realize deep removal of tin element in tin-containing crude copper and effective recovery of copper.

The invention discloses a preparation method and application of a cuprous sulfide-cerium oxide nano enzyme heterojunction nano material. The preparation method comprises the following steps: preparing Cu2S nano particles by taking cupric sulfate pentahydrate (CuSO4. 5H2O) and thiourea (CH4N2S) as raw materials in a hydrothermal synthesis manner; cu2S nano particles and Ce (NO3) 3.6 H2O are used as raw materials for preparing the cuprous sulfide-cerium oxide nano enzyme heterojunction (Cu2S-CeO2) nano material. According to the preparation method disclosed by the invention, the antibacterial efficiency and the antioxidant activity are improved when periodontitis is treated through the synergistic effect of cuprous sulfide (CuS) and cerium oxide (CeO) heterojunctions. The light-operated antibacterial and antioxidant dual functions are achieved, active oxygen is efficiently catalyzed under near-infrared light illumination to kill periodontal pathogenic bacteria, excessive free radicals are removed during non-illumination, and oxidative stress is relieved.

The invention relates to the technical field of environmental protection, and discloses a radioactive iodine adsorption material and a preparation method and application thereof, the radioactive iodine adsorption material comprises cuprous sulfide and a metal organic framework loaded on the surface of the cuprous sulfide; the cuprous sulfide is snowflake-shaped cuprous sulfide. The radioactive iodine adsorbing material provided by the invention is mainly based on a chemical adsorption mechanism and is assisted by a physical adsorption mechanism to capture radioactive iodine, has excellent adsorption capacity on gaseous and liquid iodine, and is expected to become an effective radioactive iodine trapping agent in a spent fuel post-treatment process.

The invention belongs to the technical field of functional materials, and particularly relates to a cross-band light absorption empty shell material based on nano thin-layer copper sulfide and a preparation method and application of the cross-band light absorption empty shell material. The nano thin layer copper sulphide empty shell material is prepared based on a sacrificial template, the three-dimensional space geometrical shape of template crystal grains can be reserved, and regulation and control of the shape, the outer wall thin layer thickness and the band gap of the empty shell material can be achieved. The light absorption empty shell material is composed of copper sulfide and cuprous sulfide p-type semiconductor composite polycrystalline phases, the surface of a thin shell layer is constructed by a large number of nanosheet layered small single crystals, and compared with a solid material, the free carrier concentration of the empty shell light absorption material is remarkably improved, so that a remarkable light limiting effect is caused; meanwhile, due to the hollow morphology characteristic, incident light waves can be repeatedly reflected and absorbed at the shell layer of the inner wall of the cavity, and the light absorption capacity of the material is enhanced. In addition, due to hollowing, the material has low density and high specific absorption rate, and practical application requirements are met.

This invention provides a cuprous sulfide / nickel disulfide / carbon composite material, its preparation method, and its application in batteries. The preparation method involves dispersing a copper source, a nickel source, polyvinylpyrrolidone, and a sulfur source in a solvent, followed by a hydrothermal reaction to obtain Cu. 1.81 The Cu2S / NiS2 flower-like material is obtained by further annealing. Compared with existing technologies, this invention prepares Cu2S / NiS2 / C nanosphere composite materials through a simple hydrothermal reaction and annealing process. The heterogeneous interface between Cu2S and NiS2 crystals can induce an internal electric field to accelerate ion diffusion kinetics, improve conductivity, and provide abundant reaction sites for sodium energy storage. It exhibits high reversible capacity, high specific capacity, stable cycling performance, and robust rate performance.

The invention provides an electrolytic hydrogen production catalytic electrode and a preparation method thereof and an electrolytic hydrogen production device, the electrolytic hydrogen production catalytic electrode comprises a conductive substrate and a catalytic material layer loaded on the conductive substrate, the catalytic material layer comprises a catalytic active material, the catalytic active material is a mixture of cuprous sulfide, copper sulfide and nickel sulfide, and the conductive substrate is a conductive substrate. The catalytic material layer further comprises a conductive agent and a binder, and the surface density of the catalytic material layer is 80-200 mg / cm < 2 >. The problems that the loading capacity of a catalytic material of an existing electrolytic hydrogen production catalytic electrode is difficult to accurately regulate and control, and an electrode catalytic layer is weak in binding force and prone to falling off are solved.

This invention provides a method for preparing and applying a copper-doped molybdenum disulfide (MoS2) photocatalyst. The preparation method includes the following steps: using bulk MoS2 as raw material, two-dimensional MoS2 is exfoliated using a lithium-ion intercalation method; using two-dimensional MoS2 as a substrate, copper-supported MoS2 is prepared using an impregnation method; using thiourea and copper-supported MoS2 as raw materials, a copper-doped MoS2 photocatalyst is prepared using a heat treatment method. The copper-doped MoS2 photocatalyst prepared by this invention has a unique crystal phase composition of copper sulfide (CuS), cuprous sulfide (Cu2S), and molybdenum disulfide (MoS2). It can form a built-in electric field on the surface by balancing the Fermi level, suppressing electron-hole recombination, driving directional charge migration, and enhancing the photocatalytic activity of the catalyst. The catalyst proposed in this invention can efficiently remove perfluorooctanoic acid (PFOA), a new pollutant in water, under ultraviolet light.

The invention relates to a limestone-FeS-carbon powder reconstructed slow-cooling copper slag ore phase coupling heat-mass circulation method, and belongs to the field of high-temperature copper slag waste heat recovery and valuable metal circulation extraction. According to the method, the slaked lime and the iron silicate phase in the copper slag are reconstructed to form the iron oxide and the calcium silicate phase, the iron oxide is reduced into the metallic iron or the ferroferric oxide under the action of the coke and the CO reducing agent, the metallic iron phase in the copper slag is separated through magnetic separation, the copper-containing phase of the copper slag is reconstructed, and the cuprous sulfide phase is enriched; and conditions are created for efficient flotation recovery of copper-containing phases. And finally, a calcium silicate phase in the copper slag reacts with CO2 to form a calcium carbonate phase, the energy storage effect of waste heat in a low-temperature area in the copper slag is achieved, and the stability of the copper slag is also improved. The invention provides a new process for reconstructing a copper slag ore phase by limestone and coke, the method can meet the crystallization growth effect of a copper-containing phase in the slow cooling process of the liquid copper slag, and meanwhile, efficient energy storage of copper slag waste heat is realized through a limestone decomposition reaction and a coke reduction reaction.

This invention prepares a cuprous sulfide / tungsten sulfide composite electrocatalyst (Cu₂S / WS₂) for use in an alkaline electrocatalytic sulfur oxidation coupled with acidic hydrogen production (SOR / / HER) system. Using nickel foam as a support, the Cu₂S / WS₂ / NF composite structure was constructed via a hydrothermal method combined with subsequent electrodeposition and sulfidation treatment. WS₂ provides numerous active sites, while Cu₂S enables effective interfacial modulation, significantly enhancing the catalyst's conductivity and improving its catalytic activity and sulfur poisoning resistance in the electrocatalytic sulfide oxidation reaction (SOR). The catalyst prepared in this invention exhibits excellent electrocatalytic performance and long-term stability in alkaline electrolytes. The preparation method is simple, the synthesis process is highly operable, and it can cleanly and efficiently carry out SOR reactions. 2‑ The conversion method is applicable to energy conversion fields such as hydrogen production from hydrogen sulfide decomposition, showing excellent industrial application prospects and helping to realize the resource recovery of sulfur.

The invention belongs to the technical field of electromagnetic wave absorbing materials, and discloses a multi-element copper-based metal sulfide composite material based on secondary vulcanization and a preparation method and application thereof.The method comprises the steps that a copper-based metal salt solution is prepared and subjected to heat treatment, and a product obtained after primary vulcanization is obtained; cleaning a product after the first vulcanization, drying to obtain copper sulfide, finally adding sulfur powder into the copper sulfide, grinding and mixing, and performing heat treatment again to finish the second vulcanization to obtain the multi-element copper-based metal sulfide. The microstructure of the multi-element copper-based metal sulfide composite material is of an irregular blocky structure and is used for absorbing electromagnetic waves; the composition comprises the following components in molar mass ratio: (2-3): (0-2): 2 of copper sulfide, cuprous sulfide and copper pentasulfide. The composite material has excellent wave absorbing performance in the X-Ku wave band (2-18 GHz), the preparation process is simple and controllable, the composite material is environment-friendly and high in repeatability, only conventional equipment is needed, and the composite material has outstanding industrial application potential.

The application relates to the field of photocatalysis, and provides a preparation method of a cuprous sulfide-copper sulfide-bismuth oxy carbonate ternary compound. Sodium bismuthate dihydrate, copper sulfate and thiourea are used as raw materials, and water is used as a solvent; the raw materials are prepared into a solid-liquid mixture; the solid-liquid mixture is reacted under hydrothermal conditions; through the synergistic effect of heterogeneous interface in-situ oxidation-reduction reaction, homogeneous oxidation-reduction reaction and precipitation reaction, the cuprous sulfide-copper sulfide-bismuth oxy carbonate ternary compound is prepared. The heterogeneous interface in-situ oxidation-reduction reaction of the difficult-to-dissolve sodium bismuthate dihydrate solid, the homogeneous oxidation-reduction reaction and the precipitation reaction of the copper sulfate solution occur simultaneously, the deposition of the cuprous sulfide and the copper sulfide on the surface of the bismuth oxy carbonate is completed, and the compounding of the cuprous sulfide, the copper sulfide and the bismuth oxy carbonate is realized; the whole preparation process is simple, the three components can effectively form an atomic or molecular heterostructure, and the combination effect is good.

The invention relates to preparation of a cuprous sulfide / tungsten sulfide composite titanium carbide material (Cu2S / WS2 / Ti3C2Tx). The obtained composite material is used for synthesizing ammonia through electro-catalysis nitrate radical reduction at normal temperature and normal pressure. The preparation method comprises the following steps: growing a phosphotungstic acid-based metal organic framework PW12 at Cu-BTC on porous Ti < 3 > C < 2 > T < x > in situ to obtain a composite material of PW12 at Cu-BTC / Ti < 3 > C < 2 > T < x >, and further performing a high-temperature vulcanization process to obtain the Cu2S / WS2 / Ti < 3 > C < 2 > T < x > composite material. The material combines the advantages of Cu2S, WS2 and Ti3C2Tx, and the conductivity, catalytic activity and selectivity of the catalyst are effectively improved. According to the electrocatalyst prepared by the invention, the yield of synthesis ammonia through reduction of nitrate radicals is 13.46 mg h <-1 > mgcat <-1 >, and the Faraday efficiency is 74.87%. The preparation process is simple and easy to operate, the cost is low, and the obtained material has good electrocatalytic synthesis ammonia performance.

The invention discloses a gold nanoparticle composite semiconductor material and a preparation method and application thereof, the composite semiconductor material is dumbbell-shaped, the tip part of the composite semiconductor material comprises independent cuprous sulfide or coexistence of silicon dioxide and cuprous sulfide, and the middle main body part of the composite semiconductor material is a gold nanoparticle bipyramid or a gold nanorod. The dumbbell-shaped cuprous sulfide-gold nano bipyramid composite material, the dumbbell-shaped cuprous sulfide-silicon dioxide-gold nano bipyramid composite material, the dumbbell-shaped cuprous sulfide-gold nanorod composite material, the dumbbell-shaped cuprous sulfide-silicon dioxide-gold nanorod composite material and the preparation method have the advantages that the dumbbell-shaped cuprous sulfide-gold nano bipyramid composite material and the dumbbell-shaped cuprous sulfide-silicon dioxide-gold nanorod composite material are successfully prepared; a series of different gold nanoparticle composite semiconductor materials are prepared by changing the thickness and the composite position of Cu2S, and the carbon dioxide reduction performance of the composite material is stronger than that of pure gold nanoparticles and Cu2S.

The invention discloses a method for preparing a cuprous sulfide nanowire by taking a carbon nanotube as a template, and belongs to the technical field of synthesis of nano materials. According to the method disclosed by the invention, the capillary pressure is remarkably enhanced by utilizing the characteristic that the diameter of the carbon nano tube is relatively small, and cuprous sulfide is sucked into a carbon nano tube template in a nanowire form when a surface tension critical value range is met. The size of the synthesized cuprous sulfide nanowire can be accurately regulated and controlled by using the carbon nanotubes with different tube diameters, and the length of the synthesized cuprous sulfide nanowire can be regulated and controlled by selecting the carbon nanotubes with different lengths. The method has the advantages of simple equipment, convenience in operation, no need of a process of preparing a precursor by using a complex chemical reagent and the like, and is suitable for a production scene in which the size of the nanowire needs to be designed. The growth technology disclosed by the invention is simple, rapid and low in cost, the size of the obtained nanowire can be effectively designed, the requirements of different application scenes on the size of the nanowire are met, the use of harmful chemical substances is reduced, and the environmental pressure is relieved.