556 results about "Metallic sulfide" patented technology

A method for recovering heavy metals and soluble chlorine salts from fly ash generated by incineration of domestic waste. The method comprises the following steps: first, mixing fly ash with water and an acid, performing a leaching reaction when a pH value is controlled, improving the leaching efficiency of lead and zinc by means of air agitation, and measuring dissolved oxygen or redox potential to determine a leaching reaction endpoint; second, using a vulcanizing agent to recover leached heavy metals, and adjusting and monitoring the pH value of a leachate so as to control the adding amount of the vulcanizing agent; third, adding an alkali to adjust the pH value of the leachate so as to precipitate impurities such as aluminum and iron, and using an excessive amount of the vulcanizing agent to further remove heavy metals; and finally, adding an oxidizing agent and an iron salt coagulant into the leachate from which the heavy metals and impurities are removed, so as to remove divalent sulfur and arsenic, wherein the finally purified leachate can be used for recovering soluble chlorine salts. The method has a simple and efficient process, can significantly increase the recovery rate of heavy metals, and recovers heavy metals in the form of metal sulfides, thus facilitating subsequent separation treatment. The treated fly ash can be used as a raw material of cement, thus achieving efficient utilization of resources.

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 relates to the field of material preparation and organic pollution treatment, and discloses an iron-based composite material and a preparation method and application thereof. The iron-based composite material comprises micron-sized zero-valent iron particles, a modified shell layer formed on the surfaces of the micron-sized zero-valent iron particles and a carbon material dispersed on the peripheries of the micron-sized zero-valent iron particles, and the modified shell layer is formed by enabling metal sulfide and citrate to react with the micron-sized zero-valent iron particles through electrolysis. According to the iron-based composite material, zero-valent iron is modified by adopting metal sulfide and citrate, and is loaded by adopting a carbon material, so that the dispersity of the zero-valent iron can be improved, the service life of the iron-based composite material can be further prolonged, and the degradation capacity of the iron-based composite material can be further improved.

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 present disclosure provides novel compositions of matter and a robust one-pot process to produce solid-state electrolytes, metal sulfides, and / or metal phosphates. The metal sulfides include argyrodite-type sulfide electrolyte, and the metal phosphates include lithium phosphate.

A method may include providing a treatment fluid comprising a metal sulfide dissolver and a base fluid. The metal sulfide dissolver includes a chelating agent, a boosting agent, and a dispersing agent. The treatment fluid is then injected to contact a metal sulfide scale, which dissolves at least partially. The treatment fluid may be injected into a wellbore as a standalone treatment or as an additive.

A method may include providing a treatment fluid comprising a metal sulfide dissolver and a base fluid. The metal sulfide dissolver includes a chelating agent, a boosting agent, a scaling agent, and a dispersing agent. The treatment fluid is then injected to contact a metal sulfide scale, which dissolves at least partially. The treatment fluid may be injected into a wellbore as a standalone treatment or as an additive.

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 belongs to the technical field of electro-catalytic materials, and particularly relates to a metal cation doped polymetallic sulfide nanosphere as well as a preparation method and application thereof. The metal cation doped polymetallic sulfide nanosphere is formed by polymetallic sulfide nanosheets, and polymetallic sulfide comprises molybdenum sulfide and metal cation doped cobalt sulfide; the metal cations comprise nickel ions and / or manganese ions. The material has excellent bifunctional catalytic performance of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), shows excellent water electrolysis performance, and can effectively improve the catalytic efficiency of water electrolysis.

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 invention discloses a method for realizing precise green restoration of environmental heavy metal pollutants by coupling a heavy metal sensing module and an aerobic sulfate reduction module. The method comprises the following steps: constructing an aerobic sulfate reduction pathway by heterologous reconstruction of cysteine feedback inhibition-resistant serine acetyltransferase and cysteine desulfylase, putting the aerobic sulfate reduction pathway under the control of a sensing module composed of heavy metal sensing protein genes, so as to construct a'sensing integration 'module, and transferring the'sensing integration' module into environmental microorganisms. The heavy metal in-situ remediation engineering strain is formed. When a specific heavy metal sensing module in the engineering strain recognizes heavy metal pollution, expression of an aerobic sulfate reduction module can be effectively started, so that heavy metal ions are converted into stable metal sulfide, and in-situ green low-carbon remediation of environmental heavy metal pollutants is realized. The genetic method disclosed by the invention is simple and efficient, saves the cost, can realize accurate perception and accurate control of environmental heavy metal pollution, and has important environmental protection application value.

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 composite hydrogel, a composite aerogel, a preparation method and an application. The preparation method of the composite hydrogel comprises the following steps: irradiating a mixed solution A with high-energy rays; wherein the mixed solution A comprises graphene oxide, an inorganic nano material, monomers of acrylic acid and derivatives thereof, water and an alcohol water-soluble compound; the inorganic nano material is selected from one or more of an MXene two-dimensional lamellar material, a metal oxide and a metal sulfide; in the mixed solution A, the content of the graphene oxide is 0.05-10 mg / mL, the mass ratio of the graphene oxide to monomers of acrylic acid and derivatives thereof is 1: (50-1000), and the mass ratio of the graphene oxide to the inorganic nano-material is 1: (0.1-100); the alcohol water-soluble compound accounts for 2-50% of the mixed solution A in percentage by mass. When the composite hydrogel and the composite aerogel are applied to the field of solar photo-thermal water evaporation, an evaporator is not prone to being blocked.

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 discloses a hydrolysis catalyst as well as a preparation method and application thereof. The hydrolysis catalyst comprises a carrier, a metal sulfide and an alkali metal compound, wherein the metal sulfide and the alkali metal compound are loaded on the carrier. The preparation method of the hydrolysis catalyst comprises the following steps: 1) roasting a carrier loaded with metal salt to obtain a catalyst precursor A; 2) reacting the catalyst precursor A with H2S in a protective gas containing H2S, and purging with the protective gas to obtain a catalyst precursor B; and 3) impregnating the catalyst precursor B in an alkali metal compound solution in an isovolumetric manner, and drying to obtain the hydrolysis catalyst. The hydrolysis catalyst disclosed by the invention is high in low-temperature hydrolysis activity, not easy to inactivate, long in service life and infrequent to replace.

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 provides a positive electrode pre-lithiation material and a preparation method thereof, a positive electrode plate and a lithium ion battery. The preparation method comprises the following steps: heating a mixture of lithium powder and sulfamate to obtain a positive electrode pre-lithiated material, the positive electrode pre-lithiated material comprising a metal simple substance, Li2O and Li2S; wherein the sulfamate is decomposed in the heating treatment process; the metal element in the sulfamate and the metal element in the metal simple substance are Me, and the Me is selected from one or more of elements in the VIIB family and the VIII family. The lithium powder is melted during heating treatment, the sulfamate is decomposed into a metal oxide and a metal sulfide, the metal oxide and the metal sulfide can be subjected to reverse conversion reaction with the lithium elementary substance, and metal elementary substance, Li2O and Li2S are generated in situ, so that the positive electrode pre-lithiated material is obtained. The positive electrode pre-lithiation material has relatively high specific capacity, excellent stability and electrolyte compatibility.

The invention relates to the technical field of batteries, in particular to a negative electrode material, a preparation method thereof and a battery. The negative electrode material provided by the invention comprises a porous organic framework material and metal sulfide quantum dots. Wherein the porous organic framework material has a relatively large specific surface area and rich active sites, so that the metal sulfide quantum dots can be anchored, the agglomeration of the metal sulfide quantum dots is avoided, and after the porous organic framework material and the metal sulfide quantum dots form an S-shaped heterojunction structure, the energy band structure of the porous organic framework material is changed; therefore, the electron migration and oxidation-reduction capabilities are enhanced, and the electrochemical reaction kinetics is remarkably improved.

The invention relates to the technical field of adsorbent materials, in particular to a transition metal sulfide adsorbent and a preparation method and application thereof.According to the transition metal sulfide adsorbent, Mo-MOF serves as a template, thiourea and Mo-MOF are calcined according to the mass ratio of 3-4: 1, and the transition metal sulfide adsorbent is prepared through a high-temperature template cracking method; an active center with adsorption and reduction functions is created on an adsorption material reaction interface by utilizing an MOF template high-temperature cracking method, and the prepared MOF template derived transition metal sulfide adsorption material can realize efficient selective removal and resource recycling of Ag < + > in a water body; the method has important significance for guaranteeing the safety of the water environment and maintaining the development of green and low-carbon circular economy of silver resources. And a prototype new technology integrating selective adsorption and heavy metal elementary substance is provided for a wastewater heavy metal low-carbonization technology.