66results about "Copper sulfides" patented technology

This disclosure relates to a process for removing cadmium and copper, and optionally arsenic, from phosphoric acid solutions typically obtained by wet methods. The process can also allow for the selective and separate recovery of cadmium, copper, and arsenic.

Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate. The production method for cobalt sulfate includes: a copper removal step (S1) of adding a sulfurizing agent to a cobalt chloride solution containing one or more impurities of copper, zinc, manganese, calcium, and magnesium and generating a precipitate of sulfide of copper to separate to remove copper; a neutralization step (S2) of adding a neutralizer or a carbonation agent to a cobalt chloride solution having undergone through the copper removal step (S1) and generating cobalt hydroxide or basic cobalt carbonate to separate magnesium; a leaching step (S3) of adding sulfuric acid to the cobalt hydroxide or the basic cobalt carbonate to obtain cobalt sulfate solution; and a solvent extraction step (S4) of bringing an organic solvent containing an alkyl phosphoric acid-based extractant to the cobalt sulfate solution and extracting zinc, manganese, and calcium into the organic solvent to separate to remove zinc, manganese, and calcium. These steps are sequentially executed.

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

The application discloses an upper critical solution temperature responsive mesoporous silicon and a preparation method and application thereof, and is characterized in that: mesoporous silicon is coated on the outside of copper sulfide nanoparticles (CuS NPs), and then the coated CuS NPs are subjected to amination by using an APTES solution, and then a temperature-sensitive material PEG-p(AAm-co-AN) is grafted to form the upper critical solution temperature responsive mesoporous silicon. The application has the advantages of simple method, easy operation and mild reaction condition; the final product has good stability, can be used for loading a chemotherapeutic drug doxorubicin hydrochloride, and can realize drug controlled release; has temperature response drug release performance, and the phase transition temperature of the carrier is 43 DEG C, which is suitable for the microenvironment of tumor tissues; can be subjected to photothermal therapy under the irradiation of a 980nm laser, and realizes the synergistic effect of photothermal therapy and chemotherapy.

This invention discloses a CuS nanostructure material, its preparation method, and its applications. The CuS nanostructure material uses Cu-MOF octahedrons as a precursor, which are hydrothermally sulfided to obtain an octahedral hierarchical structure assembled from CuS nanorods. The CuS nanorods have a size of 50-100 nm, and the edge length of the precursor Cu-MOF octahedrons is 0.8-1 μm. This invention utilizes a one-step hydrothermal method to prepare a CuS nanostructure material through Cu-MOF sulfidation, resulting in a zinc-ion battery anode material with high conversion efficiency and excellent electrochemical performance.

The present invention relates to a method for removing cadmium and copper and optionally arsenic contained in phosphoric acid solutions typically obtained in wet processes. The process also enables selective and separate recovery of cadmium, copper and arsenic.

The invention discloses a treatment process for high-copper sulfur concentrate waste sulfuric acid treatment, and relates to the technical field of waste sulfuric acid treatment, the treatment process comprises the following steps: S1, waste sulfuric acid pretreatment; s2, copper deposition reaction; s3, cobalt and nickel precipitation reaction; and S4, carrying out double-way optimization treatment. Through the integral treatment process, the high-quality gypsum can be obtained, heavy metals such as copper, cobalt and nickel are prevented from being mixed into the gypsum in the conventional treatment process, and a foundation for effectively utilizing the gypsum is laid. And heavy metals in the waste sulfuric acid are effectively converted into mineral products, so that the heavy metals such as copper, cobalt and nickel in the waste sulfuric acid are comprehensively utilized, and the solid waste generation amount of waste sulfuric acid treatment is reduced.

The present application belongs to the field of metallurgy, and relates to a method for producing antimony white by directly oxidizing crude antimony, comprising the following steps: S1, mixing crude antimony with crude antimony alloy, and reacting under an oxygen-containing atmosphere, to obtain oxidized slag and a melt after the reaction is completed; S2, adjusting the temperature of the melt, and then introducing compressed air to react, to produce antimony trioxide-containing flue gas, and to obtain antimony oxide slag after the reaction is completed. The present application makes full use of impurities such as sodium sulfide, sodium hydroxide and sodium thiosulfate contained in crude antimony, and innovatively uses these components for arsenic removal reaction, which not only avoids the cumbersome steps of adding various auxiliary materials in the traditional process, but also enables the original sodium sulfide, sodium hydroxide and sodium thiosulfate in the crude antimony to fully play a synergistic role, showing excellent performance in arsenic removal effect, thus simplifying the process flow, significantly reducing the production cost, and realizing the dual improvement of economic benefit and process efficiency.

This invention discloses a method for preparing hollow metal sulfides based on a mild template method using calcium carbonate. Calcium chloride powder and potassium carbonate powder are uniformly dispersed separately in an alcohol solution. The two solutions are then mixed and allowed to stand for aging to obtain solution A. Simultaneously, thioacetamide is dissolved in the alcohol solution to obtain solution B, and a chloride is dissolved in the alcohol solution to obtain solution C. The chloride is either stannous chloride or copper chloride. Then, solutions B and C are added sequentially to solution A at a molar ratio of thioacetamide to chloride of 2:1 and mixed uniformly to obtain solution D. Solution D is then placed in a polytetrafluoroethylene (PTFE) reactor and reacted at 140–180°C for 12 hours. Carbon dioxide is then continuously bubbled through the reactor for 2–3 hours. The mixture is filtered and washed with water and ethanol to obtain the hollow metal sulfides. This invention can obtain hollow metal sulfides with different morphologies and avoids the contamination problems associated with high-temperature calcination or acid dissolution for template removal.

The application relates to the technical field of sodium ion battery negative electrode materials, and discloses a preparation method and application of a copper-iron sulfide / nitrogen-doped porous carbon composite material, which comprises the following steps: (1) mixing copper salt, potassium ferricyanide, a nitrogen source and polyethylene glycol, and obtaining a copper-iron Prussian blue precursor after ball milling; (2) pyrolyzing the copper-iron Prussian blue precursor under an inert atmosphere, washing and removing impurities, and drying to obtain an intermediate product; and (3) heat-treating the intermediate product and a sulfur source under an inert atmosphere to obtain a copper-iron sulfide / nitrogen-doped porous carbon composite material. Through the synergistic effect of the double-metal sulfide and the nitrogen-doped porous carbon composite, sodium ions with a larger ion radius can be more easily embedded and de-embedded in the interlayer spacing, meanwhile, abundant active sites are provided to enhance ion storage, so that the sodium ion battery has outstanding rate performance and stable cycle performance.

Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate. The production method includes: a first solvent extraction step (S1) of bringing an organic solvent containing an alkyl phosphoric acid-based extractant into contact with a cobalt chloride solution containing impurities, and extracting zinc, manganese, and calcium into the organic solvent to separate to remove zinc, manganese, and calcium; a copper removal step (S2) of adding a sulfurizing agent to a cobalt chloride solution and generating a precipitate of sulfide of copper to separate to remove copper; a second solvent extraction step (S3) of bringing an organic solvent containing a carboxylic acid-based extractant into contact with a cobalt chloride solution and back extracting cobalt with sulfuric acid after extracting cobalt into the organic solvent to obtain cobalt sulfate solution; and a crystallization step (S4) of the cobalt sulfate solution obtained after having undergone through the second solvent extraction step (S3). These steps are sequentially executed. Without using an electrolysis process, a high purity cobalt sulfate is directly produced by separating cobalt and impurities containing manganese.

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 invention discloses a preparation method of a high-conductivity multivalent nanowire and application of the high-conductivity multivalent nanowire to a non-enzyme glucose sensor. The copper nanowire with a high length-diameter ratio is prepared, a certain amount of thiourea is directly added into an ethanol solution of the copper nanowire, and conversion from the copper nanowire to the high-conductivity multivalent nanowire can be achieved under the condition of a specific reaction temperature. In the conversion process, the surface of the nanowire is synchronously induced to form a coarse structure, non-single valence copper sulfide active sites are constructed, and the formed synergistic effect can remarkably increase the number of the active sites, reduce an electrocatalytic oxidation reaction energy barrier and strengthen the specific adsorption capacity of glucose molecules, so that the non-enzyme glucose sensor is manufactured. The sensor shows ultrahigh detection sensitivity, ultralow response speed and excellent anti-interference performance, the preparation process is extremely simple, the cost is low, and the sensor has remarkable technical advantages and wide application prospects in the field of quantitative detection of glucose.

The invention discloses a heavy metal emission reduction and sludge reduction treatment process method for circuit board wastewater. The invention provides a layered precipitation strategy of'first acid, second alkali and second sulfur '. The method comprises the following steps: performing acid precipitation on alkaline organic wastewater by using acidic wastewater, and recovering printing ink residues; carrying out air stripping treatment on the copper ammonia wastewater by utilizing an alkaline condition, and precipitating high-purity copper hydroxide; and finally, carrying out deep precipitation on residual complexing heavy metals by utilizing excessive sulfides in the pretreatment stage, and further recovering copper resources in the comprehensive water tank through coprecipitation of copper hydroxide and copper sulfide. Sludge generated in each process is classified and treated; printing ink slag, biochemical residual sludge and copper / nickel sulfide sludge are subjected to synergistic pyrogenic process treatment; copper hydroxide sludge is selectively subjected to acid dissolution to prepare copper sulfate. Lime, ferrous sulfate and polyaluminum are not used in the whole process. According to the method, the medicament is utilized to the maximum extent, the sludge is reduced by 50% or above, and the resource value of valuable metal is increased by 3-5 times.

The application belongs to the field of new energy, and discloses a recycling method of a lithium manganese iron phosphate positive electrode material, which comprises the following steps: step 1: performing aerobic roasting on black powder containing the lithium manganese iron phosphate positive electrode material; step 2: dispersing the product of step 1 into an acidic water body to obtain a solution; and step 3: extracting corresponding elements from the solution in the order of first extracting iron elements and then extracting copper elements; wherein Cu 2+ is precipitated from the solution by a precipitant. The method adopts an oxygen-rich or aerobic calcination mode to make metal elements form oxides, so as to facilitate acidolysis; according to the pH law of extraction of each metal element, copper is extracted after iron, and the copper is obtained by using a precipitation method, so that the problem that copper and iron cannot be effectively distinguished during oxygen-rich or aerobic calcination can be effectively avoided.

This invention belongs to the field of electrochemistry, and particularly relates to a copper-based catalyst, its preparation method, and its application. The preparation method provided by this invention includes the following steps: a) placing a copper foil downstream of a tube furnace and a thiourea upstream of the tube furnace, then continuously introducing an inert gas into the tube furnace. After the air in the furnace is purged, the material inside the furnace is heated and calcined to obtain a copper foil with Cu2S loaded on its surface; b) spraying a CuS dispersion onto the surface of the copper foil with Cu2S loaded on its surface, then placing it in a tube furnace, and then continuously introducing an inert gas into the tube furnace. After the air in the furnace is purged, the material inside the furnace is heated and calcined to obtain a copper-based catalyst. The preparation method provided by this invention has the advantages of low preparation cost and high catalytic activity and stability of the product. Using the copper-based catalyst prepared by this method as a working electrode, it can efficiently and stably achieve the selective deposition of cobalt and nickel in the chlorination leaching solution of waste ternary lithium-ion batteries.

The invention discloses a method for one-step preparation of a mixed-dimension high-density sulfide heterojunction, and belongs to the field of inorganic nano semiconductor materials, the method adopts a double-temperature-zone tubular furnace reaction system, a sulfur powder corundum boat wrapped by aluminum foil is arranged in a low-temperature zone so as to accurately regulate and control the release rate of sulfur vapor, and the mixed-dimension high-density sulfide heterojunction is prepared. And a corundum boat loaded with a WO3 / MoO3 and micron-sized Cu / Co powder mixed precursor is configured in the high-temperature area. Under a hydrogen-argon mixed protective atmosphere, by cooperatively controlling the heating process of a low-temperature-region chalcogenide precursor and a high-temperature-region metal oxide, directional transmission and deposition of chalcogenide vapor and WO3 / MoO3 gas phase components containing transition metal simple substances are realized under the driving of carrier gas. According to the method, multi-path and multi-step dependence of mixed-dimensional heterojunction preparation is broken through, and a universal solution is provided for single-step controllable preparation of the high-quality and high-density mixed-dimensional heterojunction by means of a synergistic effect mechanism of growth regulation and in-situ conversion.

The invention discloses a preparation method and application of a Se-doped CuS / Cu9S5 heterostructure electrode material with a hollow structure, and belongs to the field of sodium ion battery materials. The invention aims to solve the problems of obvious volume expansion, poor cycling stability and slow reaction kinetics of the existing sodium battery negative electrode material. The method comprises the following steps: 1, preparing a hollow Cu2O precursor; 2, preparing CuS with a hollow structure; 3, preparing a Se doped CuS / Cu9S5 heterostructure electrode material; the Se-doped CuS / Cu9S5 heterostructure electrode material with the hollow structure prepared by the invention can effectively relieve volume change in a sodium ion embedding / removing process, inhibit electrode pulverization, provide more ion migration channels and active sites, optimize charge transfer and ion diffusion kinetics and improve the performance of the electrode material. Therefore, the reversible capacity, the rate capability and the cycling stability of the electrode are remarkably improved. The process is simple and convenient, the cost is relatively low, and the electrochemical performance of the sodium-ion battery is remarkably improved.

The application discloses a preparation method of copper sulfide nanomaterial. The method comprises the following steps: dissolving sodium polyacrylate in deionized water, stirring for 20-30 min, and adding isopropyl alcohol dropwise to obtain a sodium polyacrylate ball solution; then adding a copper salt solution to the sodium polyacrylate ball solution, and obtaining PAAS / Cu(OH)2 NPs after reaction; dispersing the PAAS / Cu(OH)2 NPs in deionized water, adding a sulfur source, and reacting in a constant-temperature water bath at 60-80 DEG C under stirring for 30-60 min to obtain copper sulfide nanomaterial; and the sulfur source is sodium thiosulfate or thioacetamide. The application has the advantages of mild reaction condition, fast preparation, uniform particle size, beautiful appearance, good photothermal stability and the like.

The application provides a positive electrode material and a preparation method thereof, a positive electrode sheet and a lithium ion battery, and comprises a positive electrode active material and a coating layer coated on the surface of the positive electrode active material, wherein the coating layer comprises a lithium-rich reverse perovskite lithium supplement and a conductive agent, the mass content of the lithium-rich reverse perovskite lithium supplement is 0.01-10% of the mass of the positive electrode active material, and the mass content of the conductive agent is 0.01-3% of the mass of the positive electrode active material. Compared with the prior art, the positive electrode material provided by the application uses a lithium-rich reverse perovskite compound as a lithium supplement, is simultaneously compounded with the positive electrode active material to form a coating type structure, can additionally provide a large amount of lithium ions, makes up for the irreversible lithium loss of the negative electrode, and improves the reversible capacity of the full battery system.

The application belongs to the technical fields of electrochemical catalysis, new energy material and CO2 resource utilization, and discloses a preparation method of a PFDTES modified CuS nano catalyst and application of the PFDTES modified CuS nano catalyst in electrocatalytic CO2 reduction. The material takes CuS nanoparticles as a substrate, and a 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PFDTES) molecular layer is modified on the surface of the material; and a high-stability catalyst is prepared through a simple solvothermal and surface modification process. The material has high selectivity to formic acid in a full-pH electrolyte in an electrocatalytic CO2 reduction reaction. The material has excellent hydrophobicity and chemical inertness, is loaded on the surface of the material, can adjust a surface microenvironment, provide a CO2 channel, effectively inhibit a hydrogen evolution side reaction, and improve formic acid selectivity and stability.

The invention provides a method of cascade flash (FWF) Joule heating and a system thereof. The FWF Joule heating process subjects an external feedstock in an external vessel to a flash Joule heating process, wherein the flash Joule heating process of the external feedstock causes conversion of an internal feedstock within an internal vessel (the internal vessel is within the external vessel) to a converted material.

The invention relates to an annular CuS composite wave-absorbing material and a preparation method thereof, and belongs to the technical field of electromagnetic wave absorbing materials. Aiming at the technical bottlenecks of complex preparation process, high production cost, strict reaction conditions, too high material filling rate and the like commonly existing in the existing wave-absorbing material, the invention innovatively provides a simple hydrothermal synthesis strategy based on controllable morphology regulation and control. According to the method, a copper source, a surfactant, thiourea and water are mixed according to a specific proportion, and the CuS material with the unique ring shape can be prepared through a one-step hydrothermal method. Due to the special annular geometric configuration and dielectric loss mechanism of the product, the excellent electromagnetic wave attenuation performance can be realized under the condition that only 40wt% of filling amount is needed, and tests show that the lowest reflection loss reaches-55dB. The novel structural material provides an innovative solution for solving the problem that the high filling rate and the performance of a traditional wave-absorbing material are difficult to consider at the same time, and has important application prospects in the technical fields of electromagnetic shielding and stealth.

The invention provides a CuS nanosheet, a preparation method thereof and an electrode material. The preparation method comprises the following steps: mixing a cuprous source, a sulfur source and a solvent to form a reaction solution; the molar ratio of the cuprous source to the sulfur source is (1.5-2.5): 1, and the solvent comprises water; the reaction liquid is frozen, the frozen reaction liquid is heated in the atmosphere of protective gas for a reaction, a reaction product is washed and dried, and the CuS nanosheet is obtained. The invention also provides the CuS nanosheet obtained by the preparation method and an electrode material containing the nanosheet. The thickness of the CuS nanosheet is as low as atomic scale, the specific surface area is large, and the CuS nanosheet has high catalytic activity and catalytic stability.

The invention provides a preparation method of a heterogeneous transition metal chalcogenide material. The preparation method comprises a heating step, a plasma forming step and a deposition step. In the heating step, the chalcogenide solid is heated at a heating temperature to form a chalcogenide gas. In the plasma forming step, reaction gas is introduced to assist the chalcogenide gas in forming chalcogenide plasma. In the deposition step, a substrate is arranged adjacent to the chalcogenide plasma, the substrate comprises a base material and a plating layer, and the chalcogenide plasma and the plating layer are subjected to a deposition reaction at a reaction temperature and a reaction pressure to form the heterogeneous transition metal chalcogenide material with excellent optical characteristics and a surface-enhanced Raman scattering effect. Therefore, the heterogeneous transition metal chalcogenide material can be applied to a surface-enhanced Raman scattering sensor.

Provided is a method for efficiently obtaining a solution containing nickel and / or cobalt from alloys containing nickel and / or cobalt and copper, such as waste lithium-ion batteries. The present invention pertains to an alloy treatment method for obtaining a solution containing nickel and / or cobalt from alloys containing nickel and / or cobalt and copper, the method comprising: a leaching step S1 in which an acid solution is added to the alloys in the presence of a sulfurizing agent to perform a leaching treatment and obtain a leachate and a leaching residue; and a cementation step S2 in which a reducing agent and a sulfurizing agent are added to the resulting leachate to perform a copper-removal treatment for sulfurizing at least copper contained in the leachate and obtain a post-copper removal solution and a copper-removed residue, wherein the copper-removed residue obtained through the copper-removal treatment in the cementation step S2 is repeatedly subjected to the leaching step S1 and subjected to a leaching treatment together with the alloys.

The invention discloses a method and a device for directly preparing a thermoelectric material by using natural ore, and belongs to the technical field of thermoelectric materials. The method comprises the following steps: in a vacuum or inert atmosphere, heating a quartz tube filled with natural mixed ore to a preset temperature which is higher than the melting point of the thermoelectric component but lower than the melting point or decomposition temperature of the insulation associated ore; molten thermoelectric components flow through the necking structure under the action of gravity and are collected at the bottom of the quartz tube, and the insulating associated ore which is kept in a solid state is physically blocked by the necking structure and is retained at the upper part. And finally cooling to obtain a thermoelectric material cast ingot with pure components and compact tissues. According to the method, purification and densification forming of natural ore are completed through a one-step method by means of the difference of mineral melting points and ingenious physical structure design, the process is simple and convenient, cost is low, and the high-performance block thermoelectric material can be directly obtained.

The method for the mechanochemical synthesis of copper sulfides of covellite and digenite is carried out by mechanically induced self-propagating reaction (MSR) without the use of grinding balls. The steel grinding chamber is filled with copper and sulfur particles to at least 40% of the chamber volume, the stoichiometric ratio of the dosed copper and sulfur is in the range from 0.6:1 to 1:1 and the reaction mixture is ground at the milling speed at least 800 revolutions per minute. During the grinding process, the temperature of the reaction mixture is monitored using a temperature sensor, the MSR mechanism of the process is automatically started after 70 to 95 seconds from the start of grinding, when the temperature in the chamber increases by at least 150°C for 1 to 2 seconds. Subsequently, the grinding process is terminated.

The invention provides application of a chiral Fe3O4 (at) CuS nano-film with light response and magnetic response in chiral recognition, and belongs to the field of chiral recognition of a two-dimensional nano-film technology. The invention provides application of a chiral Fe3O4 (at) CuS nano-film with light response and magnetic response in chiral recognition, the chiral Fe3O4 (at) CuS nano-film comprises Fe3O4 (at) CuS nano-particles, the Fe3O4 (at) CuS nano-particles are of a spherical core-shell structure, Fe3O4 is used as a core, and CuS with the surface modified with chiral penicillamine molecules is used as a shell. Compared with a traditional detection method, the detection method disclosed by the invention is high in accuracy, high in sensitivity, low in cost and good in practical application prospect.

The invention belongs to the field of nonlinear optical materials, and discloses a broadband photoresponse CuS / MXene composite nonlinear optical material and a preparation method and application thereof. According to the preparation method, few-layer Mo2TiC2 MXene, copper chloride and sodium sulfide are used as reaction raw materials, an aqueous solution containing cetyltrimethylammonium chloride is used as a reaction solution, and the catalyst is prepared through a coprecipitation method. The obtained CuS / MXene composite nonlinear optical material is of a zero-dimensional / two-dimensional heterostructure and comprises few layers of Mo2TiC2 MXene and CuS nanoparticles loaded on the surface of the Mo2TiC2 MXene. The CuS / MXene composite material has the properties of stable structure, broadband optical absorption and ultrafast carrier response, shows an excellent broadband optical nonlinear effect, can be designed into an ultrahigh-speed, high-parallelism and low-loss broadband nonlinear photonic device, and has a wide application prospect in all-optical communication, photon calculation, quantum optics and the like.