456 results about "Metallic sulfide" patented technology

The invention belongs to the field of synthesis of nano materials, and particularly relates to a core-shell structure gold nano star and a preparation method and application thereof, and the core-shell structure gold nano star comprises a first gold nano star containing a metal sulfide shell layer and a second gold nano star containing a metal oxide shell layer. The preparation method comprises the following steps: firstly preparing a gold nano star core solution, and then respectively adding different precursors to prepare two core-shell structure gold nano stars. The method has the advantages of simple synthesis conditions and non-toxic reagents. The core-shell structure gold nanostars are used for preparing a detection solution based on a buffer solution, a color developing agent and an oxidizing agent, the detection solution reacts with antioxidants, a data matrix is constructed by measuring absorbance changes and is analyzed, single, binary and ternary combinations of various antioxidants such as ascorbic acid and glutathione can be accurately distinguished, and the detection accuracy is improved. The application prospect in the fields of biomolecules and food detection is good.

The present invention relates to the nanoparticles (NP) of the invention, compositions thereof and their use as therapeutic agents, in particular in the field of oncology and / or as imaging agents. The NPs consist of first nanoparticles of at least one high-Z metal oxide material, to which smaller second nanoparticles are covalently bonded at the surface of the first nanoparticles. The second nanoparticles consist of a) at least one noble metal or at least one metal oxide, metal sulfide, metal selenide or metal sulfide / selenide as a Fenton or Fenton-like reaction catalyst. The NPs of the invention produce a surprising therapeutic effect when exposed to ionizing radiation such as X-rays, gamma-rays, protons, neutrons, radioisotopes and / or electron beams. Therefore, these NPs can be used as radiosensitizers in the field of oncology. These nanoparticles can also be used as contrast agents.

The invention provides a method for measuring the oxidation rate of gold ore, and belongs to the technical field of process mineralogy. According to the method, the proportion of the unoxidized part (metal sulfide and crack) of the gold edge is obtained by measuring the contact length of the gold and the gold edge contact mineral, and the oxidation degree (the proportion of metal oxide and other gangue minerals) of the gold ore is obtained through conversion. Compared with traditional pretreatment modes such as crushing, ore grinding and ore dressing, the scheme does not destroy the original state of gold, and the test result is more accurate. Besides, the content proportion is represented by the proportion of the contact length of the edge contact mineral of the gold mineral and the gold, compared with the proportion of the test area, the error caused by the overlarge exposure area of the large-particle gold mineral can be weakened, the test result is more accurate, and the edge contact length of the gold and other minerals can also reflect the embedding state of the gold. The data measured by the testing method is closer to the actual production, and the definition of the gold ore oxidation rate is met.

The invention belongs to the technical field of micro-nano composite materials, and particularly relates to a preparation method and application of a multi-metal sulfide-expanded graphite composite material. The preparation method of the multi-metal sulfide-expanded graphite composite material comprises the following steps: recovering graphite negative electrodes of waste lithium ion batteries, constructing cross-linked porous three-dimensional expanded graphite through a controllable expansion strategy, uniformly loading multi-metal sulfide nanoparticles on the surface of the expanded graphite by adopting a hydrothermal method, and carrying out heat treatment to obtain the composite material. The three-dimensional grid structure of the expanded graphite not only provides uniformly dispersed anchoring points for the polymetallic sulfide nanoparticles, but also constructs a continuous conductive network. According to the heterogeneous interface engineering, the charge transfer resistance is reduced, and agglomeration and volume expansion of active substances in circulation are inhibited through the topological confinement effect. The polymetallic sulfide-expanded graphite composite material prepared by the method has good structural stability and electrical conductivity, and the cycling stability of a battery can be remarkably improved when the polymetallic sulfide-expanded graphite composite material is used as a battery material.

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 seabed dipole-dipole electromagnetic detection system and method carried on a remote control underwater robot, and belongs to the technical field of seabed metal mineral resource fine exploration. The system comprises a remote control underwater robot (ROV), a retractable receiving coil extension bracket, a transient electromagnetic transmitting coil, a transient electromagnetic receiving coil, a transient electromagnetic main engine room and an instrument fixing bracket. The extension bracket is controlled through the hydraulic retraction device, so that the receiving coil is arranged away from the ROV body, and the interference of the equipment body on electromagnetic signals is obviously reduced. The ROV performs low-altitude cruising on the seabed along a preset fine measuring line to acquire transient electromagnetic data, and the actually measured data is corrected in real time by using the full-space seawater environment response in the diving process, so that the system interference is effectively inhibited. According to the method, the high-resolution electromagnetic detection capability of ore bodies such as seabed polymetallic sulfide is improved, and the method is suitable for mineral resource investigation of complex terrains and small-scale regions.

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 invention discloses a bimetallic sulfide and biomass carbon composite material for a sodium ion battery, a negative electrode and a negative electrode of the sodium ion battery. In the bimetallic sulfide and biomass carbon composite material for the sodium ion battery provided by the invention, due to the existence of a heterostructure, the transmission rate of sodium ions in the charging and discharging process is accelerated; and due to the existence of a unique porous carbon skeleton derived from diatomite, the structural stability of the Ni3S2atCo9S8-BC anode in the charge-discharge process is ensured. Besides, the metal sulfide particles are limited to the nanometer level, under the synergistic effect of the carbon skeleton, the aggregation phenomenon of the metal sulfide particles in the circulation process can be effectively inhibited, the reversible capacity of 225.36 mAh g <-1 > can still be provided even under the large current density of 10 A g <-1 > after 7000 times of circulation, the capacity retention rate is 65.3%, and the capacity fading rate of each circle is 0.00138%.

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 provides a modified solid electrolyte, a preparation method thereof and an all-solid-state lithium ion battery, and belongs to the technical field of all-solid-state lithium ion battery manufacturing. The modified solid electrolyte is of a core-shell structure, an inner core is made of inorganic solid electrolyte, a shell is made of lithium-free metal sulfide, and the modified solid electrolyte can effectively solve the problem that the inorganic solid electrolyte is poor in air stability, so that the corresponding all-solid-state lithium ion battery has relatively excellent cycle performance.

The invention provides a preparation method and application of MAX phase derived polymetallic sulfide, and belongs to the field of lithium ion battery negative electrode material preparation. A MAX phase is used as a precursor, metal chlorides such as CuCl2, FeCl2 and CoCl2 are used as etching agents, K2S is used as a sulfur source, and etching in-situ vulcanization is performed under a NaCl / KCl molten salt system to obtain a series of multi-metal sulfide materials. When the prepared multi-metal sulfide material is used as a lithium ion battery negative electrode material, excellent cycle and rate performance is shown.

The invention discloses a high-wear-resistance long-chain nylon material for an engineering pipeline and application of the high-wear-resistance long-chain nylon material, and the long-chain nylon material is prepared from the following raw materials in percentage by weight: 68-90% of long-carbon-chain polyamide, 8-25% of a toughening agent, 1.0-5% of metal sulfide, 0.4-1.0% of a lubricant and 0.6-1.0% of an antioxidant. The long-chain nylon material disclosed by the invention has excellent wear resistance and self-lubricating performance, high melt strength and good long-term high temperature resistance and chemical corrosion resistance, and can be used for preparing engineering pipelines such as mortar conveying pipelines, concrete conveying pipelines, tailing conveying pipelines or cable sheaths and the like with the outer diameter Dn of 250mm.

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 discloses a sulfide quantum dot biochar composite material as well as a preparation method and application thereof, belongs to the technical field of resource recycling and biochar materials, and aims to solve the problem of low catalytic efficiency caused by size limitation of a sulfide material of heavy metal. The catalytic activity of the heavy metal sulfide is greatly improved. The prepared composite material is functional biochar, the surface of the composite material contains a large number of sulfydryl and metal sulfide functional groups, and on one hand, the composite material is used for efficiently adsorbing and treating wastewater containing heavy metal cations; on the other hand, the composite material obtained by adsorbing the heavy metal cations is applied to visible light catalytic reduction of carbon dioxide into carbon monoxide, and the carbon monoxide can be reused in a chemical process or used as fuel. The method synchronously realizes recycling of heavy metal cations and collection and utilization of greenhouse gases, and has important significance.

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.

A hydrogenation catalyst contains a hydrogenation catalyst carrier and an active hydrogenation component. The active hydrogenation component includes a Group VIB metal sulfide and a Group VIII metal compound, and the molar proportion of a substance of the Group VIII metal compound that interacts with the Group VIB metal sulfide to the total amount of the Group VIII metal compound is 60-100%. The hydrogenation catalyst has a higher active metal sulfurizing degree and a higher number of type II active centers, and can be applied to the hydrogenation treatment process of oil products such as distillate oils and residual oils.

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.