83 results about "Molybdenum sulfide" patented technology

The application discloses an electrochemical sensor and a preparation method and application thereof. The electrochemical sensor comprises a three-electrode system composed of a working electrode, a reference electrode and a counter electrode, wherein the working electrode is composed of a base electrode, a molybdenum disulfide nanoparticle modification layer and a polyethylene dioxythiophene layer; the molybdenum disulfide nanoparticles are loaded on the surface of the base electrode through a drop coating method, and the polyethylene dioxythiophene is in-situ loaded on the surface of the molybdenum disulfide nanoparticle modification layer through an electro-polymerization reaction. The electrochemical sensor can be used for detecting lead ions in water bodies, has the advantages of simple preparation, stable performance, suitability for an acidic medium and the like, and is suitable for practical application and popularization.

This invention discloses a method for controlling the thermal relaxation path of superconducting nanostructures and its application. This method utilizes a van der Waals integration strategy to sequentially fabricate a molybdenum disulfide layer on a silicon / silicon oxide substrate using chemical solution deposition and a niobium nitride superconducting layer using magnetron sputtering, constructing a niobium nitride / molybdenum disulfide heterostructure with intrinsic anisotropic thermal conductivity. Superconducting nanodevices with specific geometric configurations are designed for this heterostructure. Leveraging the ultra-high in-plane thermal conductivity of molybdenum disulfide and its suppressed out-of-plane heat transfer characteristics, the method achieves directional control of the internal thermal relaxation path of the superconducting nanostructure, verifying its dual advantages of optimizing thermal management and enhancing superconducting performance. The control method of this invention is mature and controllable, effectively transforming disordered thermal relaxation into directional heat transfer, significantly improving the thermal stability and integration density of superconducting devices, and providing a core solution for the thermal management of nanocircuits in fields such as superconducting quantum computing and high-sensitivity quantum detection.

This invention relates to the field of power cable technology and discloses a wear-resistant modified PE sheathed power cable with a braided reinforcement layer. From the inside out, the invention comprises a conductor, an insulation layer, a filler layer, a metal shielding layer, an inner sheath layer, a buffer layer, an armor layer, a double-gradient braided layer, and an outer sheath layer. The buffer layer is filled with nano-magnesium hydroxide particles and hollow glass microspheres to enhance buffering energy absorption and flame retardant performance, resisting external impacts and fire risks. The double-gradient braided layer uses a blended fiber design to enhance tensile strength and dynamic friction reduction, adapting to dragging and stretching conditions. The outer sheath layer, with its helical interlocking structure and graphene molybdenum disulfide modified ridge surface, enhances wear resistance and load-bearing capacity, resisting wear in complex environments. The synergistic effect of each functional layer comprehensively improves the overall performance of the cable.

The application discloses a toughened composite polyurethane impact-resistant material based on dynamic covalent bond energy regulation, and belongs to the technical field of polyurethane materials. A double dynamic covalent network containing DA bonds and disulfide bonds is constructed by reacting polyurethane prepolymer, furfurylamine, cystine diethyl ester and bismaleimide, then nano molybdenum disulfide is modified by silane, then a metal-polyphenol / polymer composite interface layer is constructed on the surface of aramid fiber by tannic acid-iron complex and polyethyleneimine, finally, the components are mixed, impregnated and hot-pressed to obtain the composite polyurethane material. The application effectively dissipates impact energy through the reversible rupture and recombination of dynamic covalent bonds, and enhances the interfacial bonding force between components by using multiple interface modification, so that the material has excellent impact resistance, high strength, high ductility and efficient self-repairing function, solves the problems of easy damage of the interface of traditional composite materials, insufficient impact resistance and irreversible damage, and has wide application prospect in the fields of safety protection and buffer components.

The application discloses a kind of perfluoropolyether nanocomposite grease and preparation method thereof, belong to the technical field of lubricating material.The lubricating grease includes perfluoropolyether base oil, polytetrafluoroethylene thickener and composite nano additive, wherein the composite nano additive is composed of surfactant modified antiwear additive, structure stabilizer, rust and oxidation inhibitor.Antiwear additive is one of nano copper, nano cerium oxide, nano titanium oxide and molybdenum sulfide, structure stabilizer is one of nano silicon oxide and porous alumina, and rust and oxidation inhibitor is nano zinc oxide.The composite nano additive is introduced in the form of perfluoropolyether oil phase dispersion, and is homogenized with thickener under the condition of 150~260℃ after dispersion and mixing.The application realizes the synchronous improvement of lubricating grease wear resistance, colloid stability, rust and oxidation resistance and oxidation stability through the synergistic effect of various nanomaterials, and is suitable for harsh working condition environment such as high temperature, high load, high vacuum and strong corrosion.

This invention belongs to the field of hydrogen barrier coating technology, specifically relating to a nickel-phosphorus-based amorphous-nanocrystalline composite hydrogen barrier coating and its preparation method. The coating uses a nickel-phosphorus alloy as an amorphous matrix, embedding a composite nano-reinforcing phase composed of core-shell structured phosphide nanoparticles, molybdenum disulfide-metal hydroxide heterostructure two-dimensional nanosheets, and silane coupling agent-modified hexagonal boron nitride nanosheets. The microstructure exhibits a coexistence of amorphous and nanocrystalline phases, with a small amount of alloying elements added to the matrix. This invention involves the controlled preparation of three composite nano-reinforcing phases, which are then combined with nickel salts and a phosphorus source to prepare a uniformly dispersed composite plating solution. This solution is deposited on a pretreated steel substrate to form an amorphous nickel-phosphorus alloy coating, followed by gradient heat treatment to construct the target microstructure. This coating, through multi-phase synergy, enhances substrate adhesion and hydrogen barrier performance, showing promising industrialization prospects in hydrogen energy storage and transportation, and petrochemical equipment protection.

The present application provides a kind of coating stainless steel welding wire and its preparation method, it is related to welding material field, including welding wire matrix and coating, the coating is coated on the outer surface of the welding wire matrix, by the total mass of the coating, the coating includes the following mass percent of raw materials: base oil 70~85%, molybdenum disulfide 2~5%, graphene 0.5~1%, monocrystalline silicon powder 1.5~3%, potassium borate 10~20%, nano titanium dioxide 0.5~1%.The present application provides a kind of coating stainless steel welding wire and its preparation method, the potassium borate in coating, nano titanium dioxide can improve the arc stability in the welding process, reduce the spatter rate;Molybdenum disulfide, graphene can increase the conductivity of welding wire while also can significantly improve the stability of welding wire feeding;Monocrystalline silicon powder can improve the forming state of weld, the final finished product coating stainless steel welding wire has good wire feeding stability, surface coating uniform and dense, arc stable, welding spatter is small, and the weld forming is good.

This invention belongs to the field of supercapacitor technology, specifically relating to a molybdenum oxide-molybdenum disulfide@polytannic acid electrode material, its preparation method, and its applications. Using molybdenum foil as the current collector and electrode, this invention prepares a molybdenum oxide-molybdenum disulfide electrode using electrochemical oxidation and hydrothermal methods. A polytannic acid coating is deposited on its surface to prepare a biodegradable molybdenum oxide-molybdenum disulfide@polytannic acid electrode. This electrode is then sandwiched with a biodegradable gel electrolyte and encapsulated with a biodegradable encapsulation material to construct a biodegradable supercapacitor with self-discharge suppression capabilities. By depositing a polytannic acid coating on the surface of the supercapacitor electrode, its self-discharge behavior is suppressed. The polytannic acid coating can prevent parasitic Faraday reactions of impurity ions on the electrode surface and prevent charge transfer, thereby suppressing the capacitor's self-discharge behavior. Simultaneously, the electrode, electrolyte, and encapsulation material can all degrade in simulated body fluids, potentially opening up applications in implantable medical electronic devices.

The present application relates to a kind of tetrahydrofuran and its preparation method, belong to synthetic technical field.The purity of tetrahydrofuran is ≥99.990%, does not contain succinic anhydride and methyl tetrahydrofuran, and the rest is impurity;Impurity includes γ-butyrolactone, content ≤0.009%, 1,4-butanediol, content ≤0.004%.Its preparation includes the following steps: maleic anhydride solution and hydrogen are introduced into the reactor loaded with supported catalyst to carry out reaction, then after separation and purification, tetrahydrofuran is obtained;Wherein the preparation of catalyst includes the following steps: S1, to pitch and molybdenum disulfide are heat treated, and porous carbon / molybdenum disulfide carrier is obtained;S2, nickel precursor and hydrophobic compound are dispersed in water, and mixed solution is obtained;The structural formula of hydrophobic compound is n ≥6;S3, porous carbon / molybdenum disulfide carrier is immersed in mixed solution, after aging, drying and heat reduction treatment, supported catalyst is obtained, and the final goal that product purity can reach 99.99% or more is achieved.

The application relates to a controllable preparation method of high-length-width-ratio molybdenum disulfide nanobelt or microbelt, and belongs to the field of low-dimensional material preparation. A molybdate solution is used as a molybdenum source, a sodium hydroxide solution is used as a catalyst, and sulfur powder is used as a sulfur source, and the molybdenum disulfide nanobelt or microbelt is obtained through a chemical vapor deposition method; by adjusting the different proportions of the mixed solution of sodium molybdate and sodium hydroxide, the size and orientation of the nanobelt / microbelt can be controlled and adjusted; by adjusting the growth time, the layer number of the nanobelt / microbelt can be adjusted; finally, the molybdenum disulfide nanobelt / microbelt with a length-width ratio greater than 100, different sizes, orientations and layer numbers can be controllably obtained on a substrate. The preparation process is simple, the production cost is low, the size, orientation and layer number are controllable, and the method is suitable for batch production.

The application aims to provide an organic cation-mediated iron-doped molybdenum disulfide nanosheet self-assembly method and application thereof, and belongs to the technical field of analysis and detection. The method uses polydiallyldimethylammonium chloride as intercalation ions, polyvinylpyrrolidone as stabilizer, and both of them cooperatively control the self-assembly of iron-doped molybdenum disulfide nanosheet. First, the iron-doped molybdenum disulfide nanosheet is prepared by using a hydrothermal synthesis method; then, the PDDA is used as intercalation agent, the PVP is used as stabilizer, and the homogeneous dispersed Fe-MoS2 nanosheet is obtained. Finally, the three-phase liquid-liquid self-assembly method is combined to realize the large-area and single-layer self-assembly of the Fe-MoS2 nanosheet. The method provides a new way for the macroscopic controllable assembly of two-dimensional materials, and combined with the noble metal SERS substrate, the rapid identification and detection of drug molecules can be realized.

The application relates to a method for degrading organic pollutants by using a cobalt intercalated 1T-MoS2 cathode and micro-nano bubbles, and relates to a method for degrading organic pollutants by using a 1T-MoS2 cathode and bubbles. The application aims to solve the technical problems of poor conductivity of a cathode molybdenum disulfide layered transition metal sulfide in current AOPs, limited active sites at edges, poor ORR selectivity and insufficient H2O2 activation capacity. The application first synthesizes cobalt intercalated 1T-MoS2 by using a one-step plasma treatment technology, and the cobalt atoms are uniformly distributed in the MoS2 layers in the form of intercalation. The application also introduces a micro-nano bubble technology, which greatly improves the dissolved oxygen concentration and mass transfer efficiency in water. Through the synergistic effect of the three-in-one combination of "material innovation-mass transfer enhancement-in-situ activation", the application realizes efficient, rapid and deep degradation of organic pollutants under mild electrochemical conditions.

The application provides a dual-mode immune probe based on a titanium carbide SERS substrate and rare earth doped sodium yttrium fluoride nanoparticles and a preparation method and application thereof, and comprises a titanium carbide / molybdenum disulfide composite immune substrate and a NaYF4:Yb,Er immune probe, wherein 78% Y, 20% Yb and 2% Er are contained in the NaYF4:Yb,Er, and the preparation method comprises the following steps: (S10) preparing titanium carbide powder by using an acid etching method; (S20) preparing a titanium carbide / molybdenum disulfide composite immune substrate; and (S30) preparing a NaYF4:Yb,Er immune probe, and the application is suitable for application in detection of prostate cancer, and the detection has high efficiency, high accuracy and high sensitivity, and is suitable for clinical popularization and application.

The application provides a bimetallic sulfide modified cadmium selenide photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalytic hydrogen production. The application prepares cadmium selenide / copper molybdenum sulfide by hydrothermal reaction of copper molybdenum sulfide and cadmium selenide. The application successfully prepares cadmium selenide / copper molybdenum sulfide (CdSe / Cu2MoS4) with high purity and good crystallization by adopting a solvothermal synthesis method (hydrothermal reaction); the cadmium selenide (CdSe) is successfully modified by a method of constructing a heterojunction, and the photocatalytic hydrogen production performance is greatly improved, a new path is provided for modifying existing photocatalysts, and new impetus is injected into the development of photocatalytic hydrogen production technology.

This application relates to the field of two-dimensional semiconductor material preparation technology, specifically to a method for preparing monolayer molybdenum disulfide by dual-sulfur source chemical vapor deposition, comprising the following steps: Step 1, providing a chemical vapor deposition reaction chamber having an upstream region, a growth region, and a downstream region; Step 2, arranging a molybdenum-containing precursor in the growth region, and arranging a substrate above or opposite to the molybdenum-containing precursor; Step 3, arranging a first sulfur-containing precursor in the upstream region and a second sulfur-containing precursor in the downstream region; Step 4, introducing a carrier gas into the reaction chamber and heating it to cause the first sulfur-containing precursor, the second sulfur-containing precursor, and the molybdenum-containing precursor to volatilize and undergo a chemical vapor deposition reaction on the substrate surface to form a monolayer molybdenum disulfide. This invention employs a dual-sulfur source strategy, achieving large-size, uniform, and low-defect preparation of monolayer MoS2, facilitating widespread application.

This invention discloses a mid-infrared detection array based on gate modulation photoelectric gain. The mid-infrared detection array is constructed on a flexible insulating substrate and includes a plurality of pixel units arranged in a periodic array. From bottom to top, each pixel unit includes: a gate, an insulating layer, a source, an active layer, and a drain. The active layer includes a lead selenide thin film, a two-dimensional molybdenum disulfide layer, and a black phosphorus quantum dot layer sequentially covering the source. Both the source and drain are interdigitated and symmetrically staggered in planar projection. The mid-infrared detection array of this invention can achieve flexible switching between fast response and high gain modes to meet the detection requirements of both high-frequency transient and low-frequency slowly varying signals, while improving the detection sensitivity of mid-infrared signals, reducing noise and dark current, and reducing the power consumption of the device.

The application provides a silicone resin flame retardant and a preparation method thereof, and belongs to the field of silicone flame retardants. Thiourea, tris(2-chloroethyl) phosphate and potassium hydroxide solution are reacted to obtain a thiolated phosphate ester; molybdenum disulfide is subjected to ultrasonic treatment to obtain flaky molybdenum disulfide; the flaky molybdenum disulfide and the thiolated phosphate ester are reacted to obtain modified molybdenum disulfide; and the modified molybdenum disulfide, modified silicone and lithium hydroxide are reacted to obtain the silicone resin flame retardant. The silicone resin flame retardant prepared by the application contains phosphorus, sulfur, nitrogen and silicon and the like, and the multiple elements are synergistic, so that the flame retardant efficiency is effectively improved; the silicone resin flame retardant has good compatibility and interface combination with the epoxy resin. The silicone flame retardant as a foreign phase can be avoided to cause stress concentration, and the mechanical properties of the epoxy resin are improved.

An electrochemically mediated, hydrometallurgical method is provided for extraction of nickel, zinc, lead, silver, molybdenum, and / or copper from sulfide minerals. These metal concentrates, such as pentlandite, pyrrhotite, pyrite, sphalerite, galena, Ag2S, MoS2, etc., are contacted with nitric acid and cerium(IV) nitrates, cerium(IV) methanesulfonate, and / or cerium(IV) sulfate, as oxidative leaching agents to preferentially leach the target metals contained therein. The strong oxidizing capacity of cerium(IV) enables rapid dissolution of metal sulfides under ambient conditions. Cerium(IV) can be electrochemically regenerated and recycled for treatment of additional sulfide minerals. Target metal products can be extracted via processes such as solvent extraction and precipitation, enabling complete recovery, e.g., of nickel from pentlandite.

This invention discloses a transition metal sulfide@wood charcoal self-supporting electrode material, its preparation, and its application. The invention involves carbonizing delignified wood in an inert gas atmosphere to obtain three-dimensional porous conductive wood charcoal; dispersing a nickel and iron source in a solvent to obtain a mixed solution A; subjecting the wood charcoal to a hydrothermal reaction in mixed solution A to obtain wood charcoal loaded with metal double hydroxides; dispersing a molybdenum and sulfur source in a solvent to obtain a mixed solution B; and subjecting the wood charcoal loaded with metal double hydroxides to a hydrothermal reaction in mixed solution B to obtain a wood charcoal electrode loaded with molybdenum sulfide and nickel-iron sulfide nanosheets, which is the transition metal sulfide@wood charcoal self-supporting electrode material. This invention utilizes a simple two-step hydrothermal method to synthesize the transition metal sulfide@wood charcoal self-supporting electrode material, constructing a heterostructure of molybdenum sulfide and nickel-iron sulfide nanosheets, thereby improving electrocatalytic activity and stability.

This invention discloses a method for preparing a composite nanofiltration membrane modified with molybdenum disulfide quantum dots and its application, belonging to the field of modified nanofiltration membrane preparation. The preparation method is as follows: based on the traditional interfacial polymerization method for preparing nanofiltration membranes, hydrophilic molybdenum disulfide quantum dots are added to the aqueous monomer, and the addition ratio of nanomaterials is controlled. Vacuum filtration is used to deposit the nanomaterials onto the surface of the base membrane, resulting in a composite polyamide nanofiltration membrane with a large amount of negative surface charge and strong hydrophilicity in neutral aqueous solution. The prepared composite membrane has a low molecular weight cutoff, significantly reduced calcium and magnesium ion rejection, and a substantial increase in water flux. In practical drinking water treatment projects, it can significantly reduce energy consumption and has broad application prospects.

The application relates to a titanium-doped molybdenum disulfide super-smooth film and a preparation method and application thereof. The titanium-doped molybdenum disulfide super-smooth film comprises a titanium transition layer, a molybdenum disulfide / titanium gradient transition layer and a molybdenum disulfide / titanium functional layer which are sequentially formed on the surface of a substrate; wherein the atomic content of titanium in the functional layer is 7at%-13at%, and the rest is molybdenum disulfide. The titanium-doped molybdenum disulfide super-smooth film is suitable for a vacuum environment and can realize a super-smooth (friction coefficient less than 0.01) effect in the vacuum environment.

The application belongs to the technical field of catalyst preparation, and particularly relates to an organic small molecule for improving hydrogen evolution performance of a molybdenum sulfide-based catalyst, a molybdenum sulfide-based catalyst, a preparation method and application. End groups at two ends of the organic small molecule respectively include a cation and an anion; the anion includes at least one of a carboxylate ion, a sulfonate ion and a phosphate ion; and the cation has a specific structural formula. The organic small molecule can improve the water electrolysis hydrogen evolution performance of an existing molybdenum sulfide catalyst, especially alkaline water electrolysis hydrogen production.

The application discloses a geopolymer gel antique exterior wall plastering mortar and a preparation method thereof. The geopolymer gel antique exterior wall plastering mortar is composed of the following components in mass: 75-85 parts of metakaolin-based geopolymer gel; and 15-25 parts of a mixture of molybdenum sulfide salt / tungsten sulfide salt. The preparation method comprises the following steps: preparing the metakaolin-based geopolymer gel; preparing the flaky stacked mixture of molybdenum sulfide salt / tungsten sulfide salt; adding the mixture of molybdenum sulfide salt / tungsten sulfide salt into the metakaolin-based geopolymer gel; and high-speed dispersing to obtain the metakaolin-based geopolymer gel antique exterior wall plastering mortar containing molybdenum sulfide salt / tungsten sulfide salt. The mixture of molybdenum sulfide salt / tungsten sulfide salt is creatively added into the geopolymer gel, and the obtained metakaolin-based geopolymer gel antique exterior wall plastering mortar can effectively improve the mechanical properties and solve the problems of color difference and wear resistance.

An oxygen-enriched vacancy MoO 3‑x @MoS2 heterojunction catalyst and preparation method thereof and application thereof in removing sulfadiazine in water body The heterojunction catalyst takes molybdenum oxide (MoO 3‑x ) as a base material, and MoS2 is in-situ grown on MoO 3‑x , and the mass fraction of MoS2 in the heterojunction catalyst is 10-25%. The catalytic material adopted in the application promotes the transfer of charges through the formation of a heterojunction and surface oxygen vacancies, thereby realizing excellent sulfadiazine removal performance. The oxygen-enriched vacancy MoO 3‑x @MoS2 heterojunction catalyst photocatalytic activation of peroxymonosulfate for removing sulfadiazine in water body has the advantages of simple operation, low cost, wide pH application range, strong anti-interference ability, stable catalytic performance, high sulfadiazine removal efficiency, etc., and has a good application prospect for sulfadiazine wastewater treatment.

The application relates to the field of brake composite materials, in particular to a copper-iron-based brake composite material and a preparation method thereof, the composite material comprising the following components by weight: 10-60 parts of a metal base material, 1-30 parts of a lubricating material and 1-10 parts of a reinforcing material; the metal base material comprises copper powder, iron powder and aluminum powder in a mass ratio of 5:5:1; the lubricating material comprises one or more of graphite, molybdenum disulfide, hexagonal boron nitride and polytetrafluoroethylene; and the reinforcing material comprises one or more of aluminum oxide, silicon carbide, tungsten carbide, carbon fiber and glass fiber. The application realizes continuous and automatic operation of material grinding, drying and blowing by integrating grinding, stirring, drying and extrusion molding in the same equipment, simplifies the process flow, reduces the equipment space and the labor operation cost, and thus improves the production efficiency and economic benefits.

The application discloses a zinc oxide / molybdenum disulfide nanocomposite and a preparation method and application thereof. The zinc oxide / molybdenum disulfide nanocomposite is prepared by taking bulk molybdenum disulfide and zinc acetate as raw materials, peeling off few-layer molybdenum disulfide nanosheets from the bulk molybdenum disulfide by using an ultrasonic cell pulverizer, and depositing ZnO nanoparticles on the molybdenum disulfide nanosheets in situ by using a coprecipitation method. The composite material has regular morphology, and the sizes of the two base materials are matched. The specific steps of the preparation method include that the method has low cost, simple equipment and low operation difficulty, and can be used for industrial large-scale production. The obtained zinc oxide / molybdenum disulfide nanocomposite has excellent abilities in antibiosis, biofilm removal, anti-inflammation and blood vessel formation, and can be applied to the fields of biomedical materials and the like.

The application discloses a powder metallurgy warm pressing process and application thereof, and relates to the field of forming technology of metallurgical parts. The powder metallurgy warm pressing process comprises the following steps: mixing alloy powder raw materials and internal lubricant to obtain a mixture; heating and treating the mixture in a reducing protective atmosphere to obtain heated mixture; feeding the heated mixture into a mold for warm pressing treatment to obtain a green body; and sintering the green body to obtain a powder metallurgy workpiece; wherein the internal lubricant comprises polytetrafluoroethylene, lithium stearate, molybdenum disulfide, copper powder, graphite powder and a dispersing agent. The application improves the powder pressing formability by heating the powder during powder mixing and heating the mold during pressing, and uses special internal lubricant and mold wall lubricant, so that the density and performance of the powder metallurgy workpiece are improved.

The application relates to a preparation method and application of a bismuth trisulfide nanowire / molybdenum disulfide nanosheet composite nanomaterial. The application aims to solve the problems of low sensitivity and long recovery time of an existing Bi2S3 material in NO2 detection at room temperature. The application adopts a simple hydrothermal synthesis method to prepare a Bi2S3 / MoS2 composite nanomaterial by taking sodium molybdate, bismuth nitrate pentahydrate and thiourea as main raw materials. In the prepared Bi2S3 / MoS2 composite nanomaterial, Bi2S3 is in a nanowire structure, MoS2 is in a nanosheet structure, and the two structures are in close contact to form a composite material. The NO2 gas sensor prepared based on the composite nanomaterial has the characteristics of high sensitivity, fast response and room temperature operation, and the application can be applied to the field of gas sensors.