184 results about "Metallic sulfide" patented technology

The invention discloses a preparation method and application of a bimetallic sulfide / three-dimensional porous carbon catalyst, and relates to the technical field of electrolyzed water catalysts.The preparation method comprises the following steps that melamine sponge is cleaned, and the clean melamine sponge is obtained; the preparation method comprises the following steps: dissolving metal salt 1 and metal salt 2 in an ethanol aqueous solution, and adding alkali and an aniline monomer to obtain a precursor solution; completely soaking the clean melamine sponge in a precursor solution, carrying out constant-temperature hydrothermal reaction, and sequentially washing and drying to obtain the melamine sponge anchored with bimetal ions; introducing inert gas for protection, and performing high-temperature vulcanization treatment to obtain the three-dimensional porous carbon catalyst embedded with the bimetallic sulfide heterostructure. The catalyst comprises uniformly dispersed bimetallic sulfide nanoparticles and a spongy three-dimensional porous carbon carrier, shows excellent bifunctional catalytic activity and stability when being applied to an electro-catalytic water decomposition reaction, and has a wide application prospect.

The invention relates to the technical field of sewage treatment, in particular to a metal sulfide nanoparticle slow-release activator for sewage treatment and a preparation method of the metal sulfide nanoparticle slow-release activator for sewage treatment. The surface of the core layer is coated with the porous silicon dioxide membrane shell layer; the citric acid modifier is loaded on a core-shell interface; according to the invention, metal sulfide (such as FeS, MoS2, WS2 and the like) micro-nano particles are used as a solid-phase slow-release activator, so that the core problem of a traditional homogeneous activation system is radically solved. Firstly, the metal sulfide exists in the form of a solid phase and can directly contact and react with permanganate without an additional dissolving step, so that the problem of complicated process operation caused by poor solubility of activating agents such as sulfite is thoroughly avoided, and the process of reclaimed water treatment is simplified. The problem of poor continuous oxidation effect of a traditional homogeneous system is thoroughly solved.

The invention belongs to the technical field of new energy materials and bioelectrochemistry, and particularly relates to an iron-based multi-metal sulfide composite carbon anode material and a preparation method of the iron-based multi-metal sulfide composite carbon anode material. The preparation method is simple in process flow, convenient to operate, easy for large-scale production, wide in raw material source, low in cost and environment-friendly, and can be used for preparing the three-dimensional porous carbon matrix which is formed by foaming and carbonizing polyvinylpyrrolidone and is provided with interconnected carbon nanosheets. Through reasonable composition design and structural regulation, and optimization of metal ratio and vulcanization conditions, accurate regulation of material performance can be realized, electrochemical performance and biocompatibility are significantly improved, electricity generation performance and operation stability of a microbial fuel cell are improved, and good industrial application prospects are achieved.

The invention discloses a metal sulfide loaded biochar demercuration adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out mechanochemical grinding on a biomass raw material and metal sulfate through a high-energy ball mill to obtain a uniform precursor; and then performing one-step pyrolysis in an inert atmosphere, synchronously carbonizing the biomass and reducing the metal sulfate into metal sulfide, and finally preparing the metal sulfide nanoparticle and charcoal matrix strong coupling composite material. The method is simple in process, green and efficient, and avoids the defects of a traditional liquid phase method. The prepared adsorbent is high in active component dispersity, is firmly combined with a carrier, shows high adsorption capacity, high removal efficiency and good anti-interference stability for elemental mercury in flue gas, and has a wide application prospect in the field of mercury pollution control of coal-fired flue gas.

The invention relates to the field of graphene composite materials, in particular to a high-thermal-conductivity graphene composite material for a self-lubricating coating, which is prepared from the following components in percentage by mass: 45 to 55 percent of matrix material, 10 to 15 percent of graphene, 20 to 25 percent of metal sulfide, 10 to 13 percent of high-thermal-conductivity filler, 3 to 5 percent of dispersing agent and 1 to 2 percent of interface modifier, in addition, the invention further discloses a preparation method of the high-thermal-conductivity graphene composite material for the self-lubricating coating, and the preparation method comprises the steps of raw material pretreatment, premixing, multi-stage jet mill compounding, post-treatment and the like. Stable and uniform dispersion of fluorinated graphene in a system is successfully realized, the problem of stress concentration caused by agglomeration is thoroughly avoided, and the mechanical integrity of the composite material and the consistency of tribological properties are remarkably improved.

The invention discloses a high-entropy metal sulfide nano material and a preparation method thereof, and relates to the field of high-entropy materials.Transition metal chlorate and sodium chloride are placed in a first reaction boat in the upstream area of a reaction container; placing the zinc sulfide nano-template in a second reaction boat in a downstream area of the reaction container; heating the reaction container to 500-525 DEG C at a first heating rate, keeping the temperature for 20-40 minutes, and transporting metal chloride gas volatilized by the eutectic effect of the precursor to a second reaction boat in a downstream area along with the dynamic airflow, so that the zinc sulfide nano-template reacts with the metal chloride gas; and cooling to room temperature at a second cooling rate, and collecting a solid product in the second reaction boat to obtain the high-entropy metal sulfide nano material. According to the method, the complex microstructure of the precursor template can be copied, and topological conversion is realized; and the chemical morphology, the components, the crystal structure and the like of the high-entropy nano material can be regulated and controlled.

The present application relates to the technical field of non-noble metal catalysts, and provides a sulfur-doped cobalt-based material with a core-shell porous structure, which has Co nanoparticles as an inner core, and a porous carbon layer containing Co9S8 coated on the surface of the Co nanoparticles. The present application significantly enhances the catalytic capacity of the material by regulating the micro-morphology and surface active site composition and structure of the material through sulfur doping. On the one hand, the metal sulfide obtained by S doping improves the electrical conductivity of the catalyst, and on the other hand, the S element can regulate the microstructure and morphology of the material due to its strong reducing effect, so that S doping is beneficial to promoting the exposure of active sites and the diffusion of target molecule, thereby significantly enhancing the oxygen molecule activation efficiency and improving the benzyl alcohol oxidation activity and selectivity.

The application discloses a kind of multinary metal sulfide and its low-temperature synthesis method and application, it is related to metal sulfide material technical field, after being mixed evenly with metal source powder and sulfur elemental powder, it is carried out ball milling reaction at room temperature, and multinary metal sulfide is obtained;The application innovatively takes room temperature as reaction temperature, with the mechanical shear force generated in the ball milling process, drive multiple-component metal source and sulfur source to occur in-situ solid-phase co-reaction, without high temperature, high pressure and organic solvent, so as to break through the technical limitation of traditional method;And by adjusting ball milling parameters, realize the continuous controllable synthesis of multinary metal sulfide from amorphous highly disordered state to high crystalline state, provide a new technical path for efficient controllable preparation and industrial application of multinary metal sulfide.

The invention relates to the technical field of batteries, in particular to a positive electrode material, a preparation method and application thereof and an all-solid-state battery. The positive electrode material comprises an inner core and an outer core, wherein the inner core contains a nickel-rich ternary material; the interface modification layer is coated on at least part of the surface of the inner core, and the interface modification layer comprises lithium phosphorus oxide and metal sulfide. According to the positive electrode material, the interface impedance of the battery can be better reduced, the critical current density is improved, and the cycle life is prolonged.

The application belongs to the field of electrode materials, and particularly relates to a raw-state ultra-thin carbon-coated metal sulfide nanodot material, which comprises metal sulfide nanodots and a nanoscale-thickness carbon layer uniformly coated on the surface of the metal sulfide nanodots. The application also provides a preparation method and application of the material. Different from conventional metal sulfide@carbon materials, the nanomaterial disclosed by the application is formed synchronously with metal sulfide and carbon materials, and the metal sulfide particles are smaller (nanodots), and the surface is uniformly coated with ultra-thin carbon material reaching atomic level nanoscale. Research finds that the material has better stability and better electrochemical performance in alkali metal secondary batteries.

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 invention belongs to the technical field of optical detectors. The invention provides a preparation method of a broadband optical detector for dynamic encryption communication. The preparation method comprises the following steps: S1, providing a SiO2 / Si substrate; s2, sequentially transferring a first transition metal sulfide and a second transition metal sulfide on the SiO2 / Si substrate in a directional transfer manner to form a transition metal sulfide layer; s3, spin-coating a PbSe QDs solution or a PbS QDs solution on the transition metal sulfide layer to form a quantum dot film with uniform quantum dots; s4, an EDT acetonitrile solution is dropwise added to the surface of the quantum dot thin film, standing reaction is conducted for preset time, and then spin coating is conducted to remove redundant ligands and reaction by-products; and S5, placing the mixed dimension quantum dot / transition metal sulfide heterostructure optical detector on a heating table for annealing treatment to complete the preparation of the mixed dimension quantum dot / transition metal sulfide heterostructure optical detector. Wherein the energy barrier at the quantum dot / transition metal sulfide heterostructure can be independently and cooperatively regulated and controlled through the drain-source voltage and the gate-source voltage, and the confidentiality of the photoelectric detector can be improved.

The invention belongs to the technical field of electrocatalyst preparation, and particularly relates to a metal sulfide-metal double-layer hydroxide heterostructure electrocatalyst as well as a preparation method and application thereof. The method comprises the following specific steps: S1, putting a piece of pretreated foamed nickel into a 0.005 g / mL-0. 015 g / mL thiourea aqueous solution, and sequentially carrying out ultrasonic treatment and heating to obtain nickel sulfide; s2, nickel chloride hexahydrate and cobalt chloride hexahydrate are dissolved in deionized water, thiourea is added, and the mixture is stirred until the mixture is completely dissolved; and performing electrochemical deposition by adopting a three-electrode system to form sulfur-doped cobalt-nickel double-layer hydroxide and nickel sulfide, and then sequentially cleaning and drying to prepare the metal sulfide-metal double-layer hydroxide heterostructure electrocatalyst. The electrocatalyst has the advantages of high performance, low cost, high benefit and the like.

The invention provides a method for co-producing alkali metal sulfide and halogen. The method comprises the following steps: reacting a mixed reaction system containing XCl, YHS and a solvent to obtain a reaction product containing XHS and YCl, and separating XHS from YCl to obtain a solution containing XHS and a YCl precipitate; dissolving the YCl precipitate in water for electrolysis to obtain YOH, H2 and Cl2; separating out XHS in the solution containing XHS, and calcining the XHS solid to obtain X2S and H2S; h2 generated by electrolysis reacts with S to generate H2S, H2S reacts with YOH obtained by electrolysis to generate YHS and water, and YHS and water are reused in the previous step. According to the method provided by the invention, high-purity alkali metal sulfide can be prepared, Cl2 can be co-produced, high-efficiency recovery and reutilization of halogen elements in raw materials are realized, byproducts are fully utilized, and internal circulation of the process is realized.

The application relates to a method and device for degrading ethion and recycling heavy metals simultaneously based on an endogenous sulfur cycle, and belongs to the technical field of dressing wastewater treatment. The device is mainly composed of sequentially connected MABR and H2-MBfR. In the method, ethion is oxidized and degraded to produce CS2 and ammonia nitrogen under aerobic conditions in the MABR, and the CS2 is further converted into sulfate; the ammonia nitrogen is nitrified into nitrate nitrogen and nitrite nitrogen. Subsequently, the effluent enters the H2-MBfR, and under anaerobic conditions, the nitrate nitrogen and the nitrite nitrogen are reduced into nitrogen gas by taking hydrogen as an electron donor, and the endogenous sulfate is reduced into sulfur ions; the sulfur ions react with heavy metal ions in situ to generate metal sulfide precipitates. Finally, the precipitates are recovered through solid-liquid separation and are reused for metal flotation. The application realizes directional conversion and collaborative removal of pollutants, does not produce secondary pollution, and realizes recycling of heavy metal resources by using the sulfur element of the pollutants.

The application belongs to the technical field of two-dimensional material preparation, and particularly relates to a preparation method of a transition metal sulfide two-dimensional material. The preparation method provided by the application comprises the following steps: taking a transition metal sulfide as a target material, taking a polysiloxane material as a substrate, and performing physical vapor deposition to obtain a polysiloxane material-transition metal sulfide composite material; the polysiloxane material-transition metal sulfide composite material comprises a polysiloxane material and a transition metal sulfide two-dimensional material film loaded on the surface of the polysiloxane material; the polysiloxane material comprises one or more of methyl silicone oil, ethyl silicone oil and phenyl silicone oil; carbon tetrachloride is used to dissolve the polysiloxane material in the polysiloxane material-transition metal sulfide composite material to obtain the transition metal sulfide two-dimensional material. The application uses a liquid polysiloxane material as a substrate to load the transition metal sulfide, breaks through the shortcoming of small size of the two-dimensional material in the prior art, and can freely control the thickness of the two-dimensional material.

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.

A porous composite cathode active material for lithium- of sodium-sulfur batteries is provided. The porous composite cathode active material includes an interconnected framework of metal sulfide particles in a conductive binder. The porous composite cathode active material contains between 50 and 75 mass % of an electroactive chalcogen conversion cathode material and between 10 and 35 mass % metal sulfide(s). Methods of making the material can include forming a slurry and drying under controlled conditions.

This invention provides a collector for recovering platinum group metals (PGMs) from spent catalysts, its preparation method, and its application, belonging to the technical field of precious metal recovery. The collector comprises a copper matrix, a flux, a framework support, and a lattice activator: the copper matrix, flux, and lattice activator are loaded on the surface of the framework support; the copper matrix is ​​elemental copper or a copper-based compound; the flux is boric acid or a borate; the framework support is a porous inorganic material; and the lattice activator is tin, a tin alloy, or a metal sulfide. The collector serves as a collector for the pyrometallurgical recovery of PGMs from spent catalysts. This invention constructs a multi-component synergistic collector composed of a copper matrix, flux, framework support, and lattice activator, which significantly improves the recovery rate of PGMs, especially rhodium, from spent automotive exhaust purification catalysts in pyrometallurgical treatment, and reduces the smelting temperature required for pyrometallurgical treatment, thus significantly reducing energy consumption.

The invention relates to a sliding material based on PTFE polymer with a filler to improve the friction properties, wherein the filler comprises at least one phosphate, in particular calcium phosphate, calcium pyrophosphate, magnesium phosphate, magnesium pyrophosphate, lithium phosphate, hydroxyapatite or combinations thereof, and at least one metal sulfide, wherein the proportion of metal sulfide is > 2%. The invention also relates to the use of the sliding material.

This invention discloses a system for recovering metal ions from acidic solutions. The system includes a hydrogen sulfide preparation device, a purification device, and a solid-liquid separation device. The hydrogen sulfide preparation device includes a bioreactor and an environmental control component. The bioreactor contains a reaction chamber, and the environmental control component regulates the conditions within the reaction chamber to maintain microbial activity and generate hydrogen sulfide gas. The purification device includes a gas-liquid contact reactor, into which acidic wastewater is fed, allowing hydrogen sulfide-containing gas to mix with the acidic wastewater. Unreacted hydrogen sulfide-containing gas is returned to the bioreactor. The solid-liquid separation device includes a precipitator, which receives the mixed wastewater and separates the metal sulfides generated in the wastewater from the liquid phase. This invention utilizes on-site biological preparation of inexpensive hydrogen sulfide to replace purchased reagents, achieving selective recovery and resource utilization of valuable metals while efficiently and safely removing heavy metals from wastewater.

The invention discloses a triazine composite desulfurizer and a preparation method thereof, and relates to the technical field of gas purification. The desulfurizing agent is prepared by taking s-triazine and a metal oxide-activated carbon compound as active main bodies, and compounding with hexahydro-1, 3, 5-tris (hydroxyethyl)-s-triazine, a surfactant, a catalyst, an anticorrosive agent and a scale inhibitor. Carrying out nucleophilic reaction on s-triazine and S atoms in H2S to remove inorganic sulfur; according to the metal oxide-activated carbon compound, activated carbon serves as a porous carrier, the high specific surface area provides rich adsorption sites, mercaptan organic sulfur molecules are adsorbed to the surface of the carrier, sulfur elements are combined with metal ions, a metal sulfide product is formed, and capture and removal of mercaptan organic sulfur are achieved. The surfactant in the desulfurizing agent optimizes the dispersity of the system, the catalyst accelerates desulfurization and inhibits precipitation, the anticorrosive agent maintains a weakly alkaline environment, and the scale inhibitor inhibits generation of inorganic salt scale. The desulfurizing agent solves the problems that a traditional desulfurizing agent is prone to generating sediment, corroding equipment, scaling and blocking and the like.

The invention relates to the technical field of photo-thermal materials, and discloses a photo-thermal composite material and a preparation method and application thereof. The photo-thermal composite material is a layered composite metal hydroxide; wherein metal sulfide grows on a laminate of the layered composite metal hydroxide in situ. And dissolving the layered composite metal hydroxide, a sulfur source and a structure-directing agent in a solvent, and reacting to obtain the photo-thermal composite material. The method provided by the invention is green and efficient, overcomes the defects of tedious steps and low yield of preparation of the photo-thermal composite material in the prior art, and improves the sunlight absorption performance, photo-thermal conversion capability and photo-thermal stability of the photo-thermal composite material by virtue of the interaction between the layered composite metal hydroxide and the sulfide.

Methods for recycling solid electrolytes include contacting the solid electrolyte with a metal halide in a solvent to produce a mixture comprising a metal sulfide, an alkali metal salt, and undissolved material. The undissolved material is removed from the mixture to form a solution, and then the solvent is removed to form a composite that includes a metal sulfide and an alkali metal salt.

The present application provides a method for improving the yield of biodiesel, comprising: contacting and reacting low-acid-value oil and fat with monohydric alcohol in the presence of metal oxide or sulfide catalyst, characterized in that carboxylic acid or high-acid-value oil and fat is additionally added. The method of the present application can effectively solve the problem of low activity of various metal oxide or metal sulfide catalysts when used for preparing biodiesel from low-acid-value oil raw materials, expand the application range of oxide or sulfide catalysts, obtain high-yield biodiesel at lower temperature and pressure, and greatly reduce the investment in devices since the reaction is carried out at low pressure.

The application discloses a cobalt sulfide / titanium carbide / carbon cloth composite anode material and a preparation method and application thereof. In order to solve the problems of the existing anode material, such as low efficiency of activating persulfate, limited electron transmission efficiency, difficulty in generating non-radicals, and complex preparation process of titanium carbide material and other materials, the application uses anhydrous ethanol and dimethylformamide as organic solvents, which can improve the solubility and dispersity of the titanium carbide material in the organic solvents and is beneficial to the generation of high-purity metal sulfide in a suitable proportion. Meanwhile, the application realizes the growth of the titanium carbide and the cobalt sulfide on the carbon cloth substrate by using a one-step solvothermal method under high temperature and high pressure, makes the cobalt sulfide grow on the surface and between the layers of the titanium carbide without changing the layered structure of the titanium carbide, and obtains the cobalt sulfide-titanium carbide-carbon cloth composite anode material, which is beneficial to the high-speed electron transmission on the electrode surface under the electric field and the generation of non-radicals. The application belongs to the technical field of electrocatalytic materials.

The application provides a metal oxide desulfurizer and a preparation method and application thereof, and belongs to the technical field of gas purification and desulfurization. The metal oxide desulfurizer is obtained by impregnating a nickel oxide or molybdenum oxide precursor on activated carbon, drying and calcining, and the metal oxide desulfurizer comprises oxygen-containing functional groups on the surface of the activated carbon and metal oxides. The metal oxide desulfurizer removes metal sulfides generated after desulfurization, and serves as a hydrogenation catalyst for thiophene sulfur.

The application discloses a beneficiation method of low-grade tin ore by using magnetic separation and flotation. The beneficiation method of low-grade tin ore by using magnetic separation and flotation comprises the following steps: step (1), crushing and grinding the low-grade tin ore, using water as a leaching agent, and separating by a wet magnetic separator to obtain magnetic minerals and magnetic tailings; step (2), drying the magnetic tailings after the magnetic separation, and then placing the tailings in a flotation agent to perform a flotation treatment to obtain flotation minerals and flotation tailings; step (3), concentrating the flotation tailings after the flotation treatment to obtain concentrated tailings; and step (4), smelting the concentrated tailings to finally obtain tin metal, sulfide, silicate, oxide and impurities. The application combines the magnetic separation and the flotation to improve the ore separation efficiency and the recovery rate, the water is used as a leaching liquid in the magnetic separation process to reduce the cost, and no new impurities are introduced, and the flotation agent can reduce the surface tension of the tin ore to improve the leaching rate.

The invention discloses a method for efficiently enriching precious metal from copper-nickel high sulfonium, and relates to the technical field of non-ferrous metallurgy. In the reaction process, sulfur in metal sulfide in the copper-nickel high sulfonium reacts with oxygen to generate sulfur dioxide, the sulfur dioxide escapes and is merged into smelting acid making or independently absorbed, Cu, Co, Fe and Ni in the copper-nickel high sulfonium react with oxygen to generate metal oxide, precious metal sulfide is decomposed into precious metal simple substances, then Cu, Co and Fe are efficiently separated out through acid leaching, and the copper-nickel high sulfonium is obtained. Nickel is successfully separated and removed through hydrogen reduction and carbonylation in the follow-up process, the precious metal is finally enriched in tailings obtained after the carbonylation reaction, the problem that the precious metal in the copper-nickel high sulfonium is difficult to enrich is effectively solved, and a precious metal raw material with the high enrichment degree is provided for follow-up precious metal refining.

The invention discloses a flue gas demercuration method and system based on metal sulfide slurry atomization spraying. The method comprises the following steps: mixing a solution containing metal salt and a surfactant with a sulfur source solution capable of generating sulfur ions, and carrying out precipitation reaction to obtain metal sulfide slurry; and the metal sulfide slurry is atomized and sprayed into a mercury-containing flue gas pipeline to convert a mercury source into mercuric sulfide. According to the method, the metal sulfide synthesized in situ through the on-site liquid phase is small in particle size, large in specific surface area, high in dispersity and high in stability, polymorphic mercury in the cement kiln flue gas can be effectively converted into stable mercuric sulfide, efficient removal of the polymorphic mercury is achieved, meanwhile, the problems of powder agglomeration and carbon residues are avoided, the preparation and operation cost is reduced, and the method is suitable for industrial production. The system stability is improved.