331 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 discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The application belongs to the technical field of intelligent electronic devices, and particularly relates to a high-color-purity multi-color electroluminescent fiber and a preparation method and application thereof. The fiber is prepared by the following steps: preparing lead halide perovskite type nano quantum dots as light conversion particles by a hot injection method, a room temperature supersaturation recrystallization method and the like; grafting and modifying the lead halide perovskite type nano quantum dots on the surface of metal sulfide type electroluminescent particles through a surface ligand to obtain high-color-purity multi-color electroluminescent active material; compounding the light conversion particle modified electroluminescent active material and a transparent thermoplastic elastomer polymer to obtain active slurry, and coating the active slurry on the surface of a conductive fiber through a continuous limited coating process; loading an external electrode on the conductive fiber to obtain the high-color-purity multi-color electroluminescent fiber. The multi-color electroluminescent fiber prepared by the application has various colors and high color purity, and meets the color gamut range required by the luminescent fiber and display fabric.

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 discloses a method for preparing a waste incineration flue gas demercuration adsorbent by utilizing microorganism induced corrosion waste battery slag, which comprises the following steps: firstly, preparing an SRB (sulfate reducing bacteria) seed culture medium by mixing SRB and an anaerobic culture medium, and then adding sulfur-rich waste battery slag into the SRB seed culture medium for anaerobic reaction; and after the reaction is finished, centrifuging, washing with deionized water and drying to obtain amorphous iron sulfide (FeSx) generated by microorganism induced corrosion. According to the method, the sulfate reducing bacteria culture medium is used as the precursor solution, the waste battery slag is subjected to anaerobic modification to prepare the mercury removal adsorbent, on one hand, high-valued and resource utilization of the sulfur-rich waste battery slag is achieved, and on the other hand, the method capable of rapidly, accurately and simply preparing the high-activity amorphous metal sulfide adsorbent in a large-scale mode is explored. Meanwhile, the type of the flue gas demercuration adsorbent is also expanded.

The present invention relates to a precursor for the production of an alloy used as a catalyst. The precursor comprises a metallic substrate, a layered structure comprising binders, metallic particles, and at least one metal oxide, metal phosphide, and / or metal sulfide, wherein the layered structure is arranged on the metallic substrate.

The invention discloses a preparation method of a catalyst for catalytic reduction of SO2 by CO in an oxygen-containing atmosphere, and belongs to the technical field of atmospheric pollution purification. According to the catalyst, base metals such as Fe and Cu are adopted to modify supported metal sulfide, active components of the supported metal sulfide comprise FeS, CoS2, CuS and the like, and common metal oxides such as cerium oxide, titanium oxide, aluminum oxide and the like are selected as carriers. The catalyst not only has strong SO2 catalytic reduction performance and high stability in an oxygen-containing atmosphere, but also is simple in preparation process, wide in raw material source and low in cost, has remarkable economical efficiency and environmental protection benefits, has a wide application prospect in the field of air pollution purification, and has important significance in reducing SO2 emission and improving air quality. The embodiment shows that when the oxygen volume content of the Fe elementary substance modified supported metal sulfide composite catalyst is 5%, the SO2 conversion rate is 97.9%, and the sulfur yield is 90.6%.

The invention discloses a technological method and system for extracting lithium from lepidolite through fluidized roasting and water leaching, and belongs to the technical field of treatment methods of lithium-containing minerals. The method comprises the following steps: S1, mixing lepidolite mineral powder with a sulfate auxiliary agent to prepare a roasted raw material, adding a fluorine fixing auxiliary agent, and mixing to prepare a mixture; s2, the mixture and fluidizing gas are subjected to preheating treatment; s3, the preheated mixture and fluidizing gas are fed into a fluidized bed roasting furnace to be subjected to a fluidized roasting reaction, and roasting clinker, a fluorine fixing auxiliary and thallium-containing tail gas are obtained through separation; s4, the thallium-containing tail gas is subjected to cyclone preheating and wet defluorination and reacts with metal sulfide, a gaseous thallium compound is removed, and solid thallium sulfide is prepared; and S5, cooling the roasted clinker, performing water leaching, filtering, neutralizing and precipitating lithium, so as to obtain lithium carbonate and leaching residues. The method is more environmentally friendly and efficient, the lithium smelting slag amount can be remarkably reduced, and fluorine recycling is achieved.

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 lepidolite steam fluidization roasting method and system, and belongs to the technical field of treatment methods of lithium-containing minerals. The roasting method provided by the invention comprises the following steps: S1, mixing lepidolite mineral powder with a sulfate auxiliary agent to prepare a roasted raw material, adding a fluorine fixing auxiliary agent, and mixing to prepare a mixture; s2, the mixture and fluidizing gas are subjected to preheating treatment; s3, the preheated mixture and the preheated fluidizing gas are fed into a fluidized bed roasting furnace to be subjected to a fluidized roasting reaction, and roasting clinker, a fluorine fixing auxiliary and thallium-containing tail gas are obtained through separation; and S4, carrying out cyclone preheating and wet defluorination on the thallium-containing tail gas, and reacting the thallium-containing tail gas with metal sulfide to prepare thallium sulfide. The method is environment-friendly and efficient, the lithium smelting slag amount and loss of harmful elements can be remarkably reduced, the utilization rate of lithium resources is increased, and the problem that hydrofluoric acid corrodes equipment in the acid leaching process is solved.

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 present invention discloses a transition metal sulfide-doped single-element phase change memory material and a preparation method thereof, wherein the material is a MoS2-doped Sb thin film material, and the chemical structure of the thin film material is Sb x (MoS2) 100‑x , where 65at.%≤x≤85at.%, is obtained by dual-target sputtering of Sb single-element target and sulfur compound MoS2 target in a magnetron sputtering coating system. The advantage is that compared with GST phase change material, this phase change memory material has a higher crystallization temperature and a lower melting temperature, higher crystallization activation energy and ten-year data retention temperature, and greatly reduced resistance drift. In addition, the performance of single-element phase change Sb is successfully improved by doping with sulfur compounds, supporting the storage stability and reliability of phase change memory devices under long periods and high cycle numbers.

The invention discloses a method for improving the photocatalytic antibacterial performance of ternary metal sulfide based on an A-site deletion strategy, which comprises the following steps: firstly, according to the molar ratio of A-site metal ions to indium ions of x: 2, wherein 0 lt; xlt; the method comprises the following steps: 1, selecting and weighing a corresponding A-site metal source, an indium source and a sulfur source according to an adaptive proportion of sulfur ions; the method comprises the following steps: dissolving an A-site metal source and an indium source in deionized water, stirring at room temperature for 30 minutes to obtain a mixed solution, adding a sulfur source, and stirring until the sulfur source is dissolved into a precursor solution; vigorously stirring and reacting the precursor solution in an oil bath at 80-120 DEG C for 3-8 hours to obtain a turbid liquid, centrifuging for 5-30 minutes at 3000-8000 r.p.m., collecting precipitates, cleaning for 2-5 times, and dispersing; and performing ultrasonic treatment for 0.5-5 hours at 200-300 W, and centrifuging to take clear liquid, thereby obtaining the AxIn2S3 + x material. The method does not need special equipment and harsh conditions, and is simple in process, high in controllability and easy to realize large-scale production.

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 relates to a Se-doped metal sulfide photocatalyst, which is a Se-doped CuInZnS photocatalyst and is of a blocky structure formed by stacking nanosheets, and Se is uniformly distributed in CuInZnS. The preparation method comprises the following steps: dispersing a copper source, an indium source, a zinc source and a sulfur source in deionized water; se powder is dispersed in an ethanol aqueous solution, and magnetic stirring is carried out at room temperature; and mixing the two solutions, and carrying out a hydrothermal reaction to obtain the Se-doped CuInZnS photocatalyst. The invention discloses application of a Se-doped metal sulfide photocatalyst. The Se-doped metal sulfide photocatalyst is applied to photocatalytic degradation of micro-plastics in water. The Se-CIZS photocatalyst has the beneficial effects that the result of a performance experiment of the Se-CIZS photocatalyst for degrading target pollutant micro-plastics shows that the degradation effect of the Se-CIZS photocatalyst on PE-MPs is obviously better than that of original CIZS under the irradiation of full-spectrum light.

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 application discloses a silicon capturing agent, a preparation method and application thereof. The silicon capturing agent comprises an alumina carrier containing a microspherical cavity, pseudo-boehmite and an active component; the pseudo-boehmite is in-situ grown on the outer surface and the microspherical cavity of the silicon capturing agent; the active component is a group VIB metal sulfide and a group VIII metal sulfide, and the group VIB metal sulfide and the group VIII metal sulfide are loaded on the alumina carrier and the pseudo-boehmite; the particle morphology of the pseudo-boehmite is a velvet worm structure, and the size of the velvet worm particle is 80-350 nm; and the surface hydroxyl content of the silicon capturing agent is 1000-2000 mu mol / g. The silicon capturing agent has high silicon capacity, can effectively capture silicon in oil from processes such as delayed coking, prevents the silicon poisoning and deactivation of a main catalyst, and has high hydrogenation desulfurization, denitrification and olefin saturation activities.

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.

The present invention provides a silicon scavenger, comprising alumina, pseudo-boehmite and an active component, wherein the active component is a Group VIB metal sulfide and a Group VIII metal sulfide, wherein the Group VIB metal sulfide accounts for 2-20%, the Group VIII metal sulfide accounts for 1-10%, the pseudo-boehmite content is 3-20%, and the specific surface area of ​​the silicon scavenger is 300-400m 2 / g, with a surface hydroxyl content of 1000-2000µmol / g. The silicon scavenger is prepared by impregnating and loading the active component, followed by sulfidation. Pseudoboehmite is then synthesized on the surface of the silicon scavenger using an aluminum source and a precipitant. This provides the silicon scavenger with abundant surface hydroxyl groups, thereby improving its silicon-holding capacity. Sulfidation followed by pseudoboehmite loading avoids subsequent high-temperature treatment, preventing aggregation of pseudoboehmite particles that would reduce the surface hydroxyl content. This also improves the silicon-holding capacity of the silicon-capturing catalyst. The contact surface between the metal sulfide wafer and the pseudoboehmite is increased, enhancing the synergistic effect between the catalyst's hydrogenation performance and silicon-capturing properties.

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.