409 results about "Molybdenum sulfide" patented technology

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The application provides a preparation method of a self-coiled structure molybdenum disulfide / nitrogen-doped porous carbon composite material, a product and application, high-content nitrogen-doped porous carbon material is synthesized by inducing dicyandiamide molecules to undergo a supramolecular self-assembly process, and on this basis, a hydrothermal reaction is carried out to coat molybdenum sulfide sheet layer material on the surface, and finally, a self-heating coiling treatment is carried out to form a carbon-based electrocatalyst of the self-coiled structure molybdenum disulfide / nitrogen-doped porous carbon. Compared with a high specific surface area carbon-based catalyst, high doping concentration of nitrogen atoms can provide more electron-rich properties to facilitate the adsorption of substances, and the self-coiled carbon-based material can exhibit very excellent electrochemical performance, especially in the aspect of electrochemical hydrogen production. The preparation method is simple in operation, low in preparation cost and suitable for large-scale production.

The invention relates to a normal-temperature curing high-corrosion-resistance self-lubricating composite coating which is prepared from the following components in parts by weight: 25 to 35 parts of modified epoxy resin, 12 to 22 parts of waterborne polyurethane-acrylate copolymer, 6 to 14 parts of lubricating filler, 4 to 9 parts of corrosion-resistant filler, 10 to 18 parts of composite curing agent, 1 to 4 parts of dispersing agent, 0.5 to 3.5 parts of flatting agent, 0.8 to 2.5 parts of defoaming agent and 35 to 55 parts of auxiliary solvent. According to the coating disclosed by the invention, an interpenetrating network matrix is constructed through modified epoxy resin and a waterborne polyurethane-acrylate copolymer, and is matched with components such as a nano molybdenum disulfide / graphene composite lubricating filler and a nano titanium dioxide-zinc oxide composite corrosion-resistant filler, and a photoinitiator-amine composite curing agent is combined, so that dual curing is realized. The coating has excellent properties of rapid curing at normal temperature, high corrosion resistance, self-lubrication and the like, is low in VOC content and wide in application range, and provides an innovative solution for the field of surface protection.

The invention relates to the technical field of lubricating materials, and provides a super-lubricating amorphous carbon-based thin film as well as a preparation method and application thereof. The super-lubricating amorphous carbon-based thin film comprises a bonding transition layer, a carbide gradient layer and a composite hydrogen-containing amorphous carbon-based film layer which are sequentially arranged from bottom to top, the composite hydrogen-containing amorphous carbon-based film layer is a sulfide-doped hydrogen-containing amorphous carbon thin film, and sulfide is one or two of tungsten sulfide and molybdenum sulfide. The structure of the carbon-based thin film is regulated and controlled by doping a small amount of sulfide, compared with a traditional hydrogen-containing amorphous carbon-based thin film, the obtained super-lubricating amorphous carbon-based thin film shows more stable super-lubricating performance and more excellent wear resistance, a new solution is provided for surface protection of tribological parts, and the method is suitable for popularization and application. The method has important industrial application value.

The invention provides polymer foam with high photothermal conversion efficiency and a preparation method of the polymer foam. The polymer foam with high photothermal conversion efficiency comprises a melamine three-dimensional foam skeleton and a single-layer MoS2 nanosheet which is polymerized on the melamine three-dimensional foam skeleton in situ, according to the scheme, single-layer molybdenum disulfide is uniformly introduced into a three-dimensional polymer skeleton based on an in-situ polymerization process, so that the three-dimensional structured evaporator with high photothermal conversion efficiency, excellent salt crystallization resistance and a simple processing process is constructed.

The application discloses a preparation method of a two-dimensional rhenium sulfide-molybdenum sulfide vertical heterostructure. The method is chemical vapor deposition, and Si / SiO2 is used as a substrate, a metal rhenium foil (Re) is used as a rhenium source, and a metal molybdenum foil (Mo) is used as a molybdenum source. The metal rhenium foil is laid on one end surface of the metal molybdenum foil, the substrate is inverted on the metal molybdenum foil, and the substrate is reacted with sulfur vapor to prepare a two-dimensional ReS2 / MoS2 vertical heterostructure with a multilayer ReS2 as a bottom layer and a double-layer MoS2 as a top layer. The obtained two-dimensional ReS2 / MoS2 vertical heterojunction material is a crystal stacked by two crystals with different sizes, presents obvious luminescent properties, can be used as a channel material of a transistor and applied to the field of ultrathin electronic devices, and has potential application in the field of high-efficiency light detectors.

The invention relates to the technical field of solar photovoltaic backboards, in particular to a high-water-resistance solar cell backboard and a preparation method thereof. The solar cell backboard structurally comprises a weather-proof layer, a nano-composite waterproof layer, a substrate supporting layer and a bonding layer from bottom to top in sequence, the preparation raw materials of the nanometer composite waterproof layer comprise a nanometer material, multilayer graphene, saturated aliphatic polyester polyol and a curing agent. The nano material comprises at least one of nano silicon dioxide, nano clay, single-walled carbon nanotubes, multi-walled carbon nanotubes, nano aluminum oxide, nano boron carbide, nano cellulose, nano zinc oxide, nano titanium oxide and nano molybdenum disulfide. The invention has the advantages of better water resistance and weather resistance and simpler preparation process.

The invention relates to the technical field of catalysts, in particular to a graphene-based desulfurization catalyst and a preparation method thereof. Graphene oxide is used as a carrier, an initiating group is introduced firstly, a short-brush amphoteric polymer gradient modification layer and a long-brush amphoteric polymer gradient modification layer are sequentially constructed through atom transfer radical polymerization, ammonium molybdate-urea complex deposition is fused, and uniform nucleation of a metal precursor is achieved. Two-stage vulcanization is adopted in the preparation process, the crystallization process of a precursor is controlled step by step at different temperatures, and the size and dispersity of a molybdenum disulfide sheet layer are optimized. The catalyst is high in conversion rate under a hydrodesulfurization model system, low in total sulfur of discharged materials, and excellent in activity retention rate after multiple cycles. The method can be widely applied to the field of fuel oil deep desulfurization, and the efficient and environment-friendly industrial catalysis requirement is met.

The invention discloses a method for preparing a two-dimensional material with a wrinkle structure under the assistance of liquid metal and application, and belongs to the field of micro-nano machining of two-dimensional materials. The method comprises the following steps: S1, covering the upper surface of a two-dimensional material with liquid metal gallium, and solidifying the liquid metal gallium under a cooling condition to obtain a metal gallium ingot loaded with a two-dimensional material nanosheet; s2, heating the metal gallium ingot loaded with the molybdenum disulfide nanosheet until gallium is molten, cooling and solidifying, and obtaining a two-dimensional material with a wrinkle structure after solidification; the method disclosed by the invention can be used for efficiently preparing the large-area and high-density wrinkle type two-dimensional material, is suitable for manufacturing devices such as high-performance sensors and has a wide application prospect.

The invention discloses a high-conductivity phosphorus-copper alloy and a surface treatment process thereof, and relates to the technical field of copper alloy surface treatment.The surface treatment process comprises the specific steps that after the phosphorus-copper alloy is cleaned, sand blasting treatment is conducted, then a composite coating is coated, and pyrolysis annealing is conducted to obtain a middle layer; coating an epoxy composite coating on the surface of the middle layer, and curing at 40-45 DEG C for 20-24 hours to form a surface layer; wherein the composite coating is prepared from the following raw material components in parts by mass: 5 to 8 parts of phosphorus-copper doped molybdenum disulfide, 1 to 3 parts of copper powder, 0.2 to 3 parts of metal salt, 20 to 30 parts of aniline tripolymer derivative and 60 to 80 parts of N, N-dimethylformamide; the epoxy composite coating comprises the following raw material components in parts by mass: 80-100 parts of epoxy resin, 1-3 parts of modified MXene, 1-3 parts of phosphorus-copper doped molybdenum disulfide and 60-75 parts of a curing agent.

The invention discloses a multi-release type alumite, and relates to the technical field of alumite preparation, and the multi-release type alumite is prepared by the following steps: preparing a release coating material liquid, and coating and baking to obtain the multi-release type alumite; the preparation of the release coating material liquid comprises the following steps: mixing a modified waterborne polyurethane-acrylate composite emulsion, a molybdenum disulfide-cage phase change microcapsule hybrid nanofiller, a coalescing agent, a wetting leveling agent and an organic silicon defoaming agent in a stirring state, adjusting the viscosity, and then standing for defoaming; the preparation of the release coating material liquid comprises the following steps: mixing the modified waterborne polyurethane-acrylate composite emulsion, the molybdenum disulfide-cage phase change microcapsule hybrid nanofiller, the coalescing agent, the wetting leveling agent and the organic silicon defoaming agent in a stirring state; the step of coating and baking comprises the sub-steps of uniformly coating a PET base film subjected to corona treatment with a release coating material liquid by adopting a micro gravure coating technology, carrying out gradient heating pre-baking by virtue of a three-section infrared tunnel oven, and finally baking in a high-temperature baking area. Through chemical integrated design, low release force and high hardness of the coating are coordinated, clean and sharp transfer of fine patterns is achieved, a process window is widened by means of a photo-thermal sensitization mechanism, and adaptability and yield of products under complex working conditions are improved.

The invention relates to the technical field of electrochemistry, and particularly provides a negative electrode active material, a preparation method thereof and a battery. The preparation method of the negative electrode active material comprises the following steps: mixing the high-sulfur petroleum coke, the isotropic coke, the organic titanium-based cross-linking agent and the binder, and carbonizing at the temperature of 300-500 DEG C; after carbonization is completed, the temperature is raised to 1000-1200 DEG C, then phosphorane is introduced, the phosphorus element is doped into the carbonized material, and a phosphorus-doped graphite precursor is obtained; graphitizing the phosphorus-doped graphite precursor to obtain phosphorus-doped graphite; and soaking the phosphorus-doped graphite in an organic solution containing molybdenum sulfide and a lithium benzenesulfonate compound, and drying to obtain the negative electrode active material. The negative electrode active material obtained by the preparation method can significantly improve the cycle performance and the rate capability of the battery, and the molybdenum sulfide and the lithium benzenesulfonate compound coated on the surface of the graphite can further improve the low temperature resistance and the high temperature resistance of the negative electrode active material.

The invention relates to the field of ultrafiltration membranes, in particular to a seawater-corrosion-resistant ultrafiltration membrane for water treatment and a preparation method of the seawater-corrosion-resistant ultrafiltration membrane, which are used for solving the problems that the conventional ultrafiltration membrane is easily corroded and polluted in a seawater water treatment environment, so that the performance of the ultrafiltration membrane is remarkably reduced, and the water treatment cost and the operation difficulty are increased. The ultra-filtration membrane takes a carboxyl fluorine-containing polyarylether sulfone material as a main raw material, so that the ultra-filtration membrane has good chemical stability and corrosion resistance in a seawater environment, a quaternized zinc-based metal organic framework material is added into the ultra-filtration membrane, and a porous structure of the quaternized zinc-based metal organic framework material is utilized to enable the ultra-filtration membrane to have higher permeability, so that the removal performance of the ultra-filtration membrane is improved; meanwhile, the ultra-filtration membrane can be endowed with excellent antibacterial performance, formation of a biological membrane is effectively inhibited, biological pollution is avoided, the self-cleaning and anti-pollution capacity of the ultra-filtration membrane can be improved by adding the modified nano molybdenum disulfide powder, the removal performance of the ultra-filtration membrane is guaranteed for a long time, and the water treatment effect is improved.

The invention discloses a high-corrosion-resistant and wear-resistant tungsten-based hard alloy and a preparation method thereof, and relates to the technical field of hard alloys. The high-corrosion-resistant and wear-resistant tungsten-based hard alloy is composed of tungsten-based composite oxide and molybdenum disulfide boron nitride hybrid nanofibers and graphene coated core-shell composite powder. Tungsten-based composite oxide and molybdenum disulfide boron nitride hybrid nanofibers and graphene-coated core-shell composite powder are subjected to high-temperature sintering, the interface bonding performance of the nanofibers and the graphene-coated core-shell composite powder is enhanced in a physical anchoring and chemical bonding mode, defects are reduced, external stress is effectively transmitted, the barrier protection effect can be enhanced, permeation of a corrosion medium is fully isolated, and the corrosion resistance of the corrosion medium is improved. And a multi-scale lubricating system is also constructed, and the abrasion of substances such as tungsten carbide and cobalt is reduced, so that the bending strength, the corrosion resistance and the abrasion resistance are remarkably enhanced, the use performance of the tungsten-based hard alloy is optimized, and the service life of the tungsten-based hard alloy is prolonged.

An environmentally friendly, wear-resistant and noise-reducing engineering plastic composition, a preparation method therefor and a use thereof. The composition comprises the following components: a thermoplastic resin, a reinforcing filler, a wear-resistant and noise-reducing auxiliary agent, a wear-resistant auxiliary agent, and other auxiliary agents. The wear-resistant and noise-reducing auxiliary agent comprises at least one of a polyolefin-styrene graft copolymer or a polyolefin-styrene graft copolymer modified with a reactive functional group. The wear-resistant auxiliary agent is selected from among one of UHMWPE, polysiloxane, molybdenum disulfide, graphite, and a modified fatty acid ester. The reinforcing filler comprises at least one of fiberglass, carbon fibers, and an inorganic mineral. The wear-resistant and noise-reducing auxiliary agent and the wear-resistant auxiliary agent are used in combination, so that the wear resistance and noise reduction performance of the modified engineering plastic can be significantly improved, the composition is environmentally friendly, and the mechanical properties of the modified material can be maintained.

The invention relates to the technical field of battery management systems, in particular to a method for monitoring the health state of a mining emergency lithium battery pack, a battery cell electrolyte contains 0.08%-0.15% of nano cerium oxide, 0.15%-0.25% of lithium borate and 0.03%-0.08% of amino trimethylene phosphonic acid, and a diaphragm is coated with 0.8%-1.2% of a graphene-carbon nanotube-molybdenum sulfide composite coating. The method comprises the following steps: S1, deploying a multi-dimensional sensor, collecting voltage, current and other data, and dynamically adjusting the sampling frequency; s2, carrying out noise reduction, abnormal value elimination and interpolation completion on the data; s3, extracting characteristic parameters such as capacity attenuation rate; s4, detecting the content of POF3, and associating the capacity fading rate; s5, modeling by using an improved BP neural network, and outputting an SOH value; and S6, triggering grading early warning according to the SOH value and the POF3 content. According to the method, through material innovation and multi-dimensional monitoring, SOH evaluation precision is improved, faults are early warned in advance, environmental adaptability and safety prevention and control are enhanced, the defects of a traditional method are overcome, and mining emergency power supply safety is guaranteed.

The present application belongs to the technical field of biological oil catalytic hydrogenation, and particularly relates to a bio-based oil-soluble molybdenum catalyst, a preparation method and application thereof. The preparation method of the bio-based oil-soluble molybdenum catalyst provided by the present application comprises: mixing a molybdenum source, a bio-based linear organic acid with a carbon atom number of 16 or more and an additive, heating and reacting, and separating to obtain the bio-based oil-soluble molybdenum catalyst; the additive is selected from at least one of tetrahydro naphthalene and decahydro naphthalene. The bio-based oil-soluble molybdenum catalyst green material obtained by the present application has optimal activity and high dispersibility when used, can realize more sufficient mixing with raw materials, forms nano high-dispersed molybdenum sulfide through sulfuration, and realizes high-efficiency hydrogenation refining of oil products through the joint action of hydrogen and sulfur, while reducing the sulfur, oxygen and metal residues in the product oil.

The application discloses a method for degrading organic pollutants in water by using molybdenum disulfide activated potassium permanganate, which comprises sequentially adding molybdenum disulfide powder and potassium permanganate into water containing trace organic pollutants, treating for 10-90 minutes, and then removing unreacted potassium permanganate and molybdenum disulfide powder through coagulation, sedimentation and filtration in sequence; when the concentration of the trace organic pollutants in the water is 0.1-5 muM, the adding amount of the potassium permanganate is 50-300 mu mol / L, and the adding amount of the molybdenum disulfide is 25-150 mg / L; when the concentration of the trace organic pollutants in the water is greater than 5 muM, the adding amount of the potassium permanganate is 150-500 mol / L, the adding amount of the molybdenum disulfide is 50-200 mg / L, and the adding ratio of the molybdenum disulfide to the potassium permanganate is 1:(0.4-0.8). The method can enhance the degradation capacity of the potassium permanganate by adding the molybdenum disulfide, improve the removal rate of the organic pollutants, reduce the adding amount of the potassium permanganate agent, finally reduce the cost of water treatment, and effectively alleviate the chroma problem caused by a high adding amount of the potassium permanganate.

The invention provides a composite supercapacitor material, a preparation method thereof and a supercapacitor, and the preparation method comprises the following steps: immersing a foam metal substrate in a sulfur-molybdenum source deposition solution, and carrying out the first electrodeposition to obtain a foam metal substrate loaded with amorphous molybdenum sulfide; and immersing the foam metal substrate loaded with amorphous molybdenum sulfide into a silver source deposition solution, and carrying out second electrodeposition to obtain the composite supercapacitor material which comprises the foam metal substrate loaded with amorphous molybdenum sulfide and silver. According to the preparation method, the silver-amorphous molybdenum sulfide-foam metal composite electrode material is prepared through two-step electrochemical deposition, the preparation process is simplified, high temperature and high pressure are not needed, large-scale production can be achieved, and a high-performance water-based and solid-state symmetric supercapacitor constructed based on the material has a good application prospect. And collaborative improvement of energy density and power density and practicability of a solid-state device can be realized.

The invention provides a molybdenum disulfide / perovskite heterojunction composite material and a preparation method and application thereof. The composite material is formed by growing mixed powder of lead halide and cesium halide on the surface of a molybdenum disulfide material. Comprising the following steps: (a) fully mixing lead halide and cesium halide powder according to a certain proportion, and placing the mixture in a crucible; (b) putting the crucible in which the mixed powder is placed into a tubular furnace, putting a molybdenum disulfide substrate above the crucible by 10cm, and pumping out air in the tubular furnace; (c) setting a tube furnace program, and heating and preserving heat at a certain speed and for a certain time; after the procedure is finished, the temperature of the tubular furnace is reduced to the room temperature, and the heterojunction composite material is obtained. The size of the composite material can reach a wafer level (2 inches), and the composite material has excellent photoelectric properties and has wide application prospects in photoelectric detectors with photoconductive structures.

The invention provides a high-pressure wear-resistant valve rubber. The valve rubber is prepared from the following raw materials in parts by weight: 100 parts of a polyurethane prepolymer, 20 to 30 parts of a chain extender, 12 to 18 parts of a polycaprolactone coated boron nitride / molybdenum disulfide composite material and 0.5 to 2 parts of an antioxidant. Wherein the polycaprolactone coated boron nitride / molybdenum disulfide composite material is obtained by polymerizing an amino silane coupling agent modified boron nitride / molybdenum disulfide composite material, triethyl aluminum and epsilon-caprolactone in an organic solvent at 35-45 DEG C in an inert atmosphere. A polycaprolactone-coated boron nitride / molybdenum disulfide composite material is used as a filler, and boron nitride / molybdenum disulfide as an inner core forms a synergistic structure of a reinforced substrate and a lubricating surface layer, so that high-pressure load bearing and friction coefficient reduction are facilitated; and the polycaprolactone flexible shell layer is compatible with the matrix, so that the filler is uniformly dispersed in the matrix.

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.

The invention discloses an infrared bipolar linearly-polarized photoelectric detector and a preparation method thereof, and the infrared bipolar linearly-polarized photoelectric detector is characterized in that a bipolar material graphene is used as a channel material, a two-dimensional N-type semiconductor material molybdenum disulfide MoS2 and an anisotropic narrow-band-gap two-dimensional material black phosphorus BP are stacked on the bipolar material graphene in sequence, and the two-dimensional N-type semiconductor material molybdenum disulfide MoS2 and the anisotropic narrow-band-gap two-dimensional material black phosphorus BP are stacked on the channel material; the polarity of the graphene is regulated and controlled by the bottom gate, the infrared bipolar linearly polarized photoelectric detector with the bipolar linear polarization detection effect that the light current symbol reversibly turns over along with the polarization direction in the infrared band is achieved, and the infrared bipolar linearly polarized photoelectric detector has the advantages of being simple in structure, easy to regulate and control, capable of remarkably improving polarization recognition precision and the signal-to-noise ratio and the like. The programmable and multifunctional integration potential is also realized.

The invention provides a long-acting lubricating method for forming transition metal sulfide on the surface in situ, and belongs to the technical field of friction chemical synthesis and lubrication. The preparation method comprises the following steps: mixing an active sulfur-containing hydrogen bond donor with a hydrogen bond acceptor to obtain a sulfur-containing eutectic solvent; a sliding friction pair is formed by a substrate material and a pair, the sulfur-containing eutectic solvent is added to a contact area of the sliding friction pair and reaches an immersed state, friction is carried out, and the substrate material contains transition metal elements. Based on a friction chemical reaction mechanism, a sulfur-containing eutectic solvent is used as an active sulfur source, and stress and heat of a friction interface are utilized to develop a system for carrying out in-situ vulcanization reaction on the surface containing transition metal elements to generate transition metal sulfide with a lubricating property; the problem of performance degradation caused by friction loss and difficulty in supplement of transition metal sulfides such as molybdenum disulfide and tungsten disulfide in the use process of the traditional lubricant is solved, and the service life of a lubricating system is greatly prolonged.

The utility model relates to the technical field of molybdenum disulfide washing devices, in particular to a molybdenum disulfide washing device which comprises a liquid outlet pipe, a liquid outlet is formed in the lower portion of the outer wall of the liquid outlet pipe in a penetrating mode, an ultrasonic vibration plate is fixedly connected to the lower end of the inner wall of a cabinet body, and U-shaped fixing blocks are fixedly connected to the inner walls of the left end and the right end of the cabinet body. A T-shaped block is movably arranged at the groove of the U-shaped fixing block, the lower end of the T-shaped block is fixedly connected with an adsorption plate, and third groove bodies are formed in the upper end and the lower end of the adsorption plate in a penetrating mode. When a water source is injected into molybdenum disulfide through the liquid outlet in the liquid outlet pipe, the ultrasonic vibration plate is started, the molybdenum disulfide in the cabinet body is subjected to ultrasonic vibration work, ultrasonic vibration can strengthen solid-liquid collision, acidic substances and impurities on the surface of the molybdenum disulfide are promoted to fall off from the surfaces of particles and are dispersed into a water solution, and therefore the molybdenum disulfide is purified. Then the aqueous solution penetrates through the filter plate and flows into the upper end of the filter plate, and then impurities in the solution are adsorbed by using an adsorption plate, so that the deacidification work of molybdenum disulfide is realized.

The invention relates to the technical field of membrane separation, in particular to a molybdenum disulfide composite membrane and a preparation method and application thereof. The problems that an existing polymer separation membrane is low in interface stability and insufficient in surface hydrophilicity, and in the compounding process of a two-dimensional nano material and the polymer separation membrane, the interface bonding force is weak, the material is prone to loss, and the hydrophilicity and the separation performance are difficult to synergistically improve are solved. The invention relates to a preparation method of a molybdenum disulfide composite film. The preparation method comprises the following steps: 1, depositing MoS2 / Zn (OH) 2 composite particles on a polymer supporting film; step 2, placing the membrane obtained in the step 1 in an organic ligand solution, generating ZIF-8 in composite particles through self-limiting in-situ conversion, and forming a MoS2 / ZIF-8 composite transition layer; 3, the membrane obtained in the step 2 makes contact with a polyethyleneimine solution for grafting, a polyamide layer is formed through interfacial polymerization reaction, and the composite membrane is obtained after curing. The structural stability and flux of the composite membrane are improved, and efficient and stable adsorption and separation of heavy metal ions are realized.

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.

According to the method, melamine and urea are used as carbon and nitrogen sources, hollow tubular phosphorus-doped carbon nitride is constructed by adopting a sodium polyphosphate-assisted hydrothermal-thermal polymerization method, molybdenum disulfide is loaded on the surface of P-TCN in a hydrothermal in-situ growth mode, and the hollow tubular phosphorus-doped heterojunction photocatalyst is obtained. The hollow tubular phosphorus-doped heterojunction photocatalyst P-TCN / MoS2 is prepared; the catalyst disclosed by the invention shows excellent degradation performance on ciprofloxacin, levofloxacin, rhodamine B and methylene blue under an illumination condition. The catalyst disclosed by the invention is simple in preparation method, low in cost and easily available in raw materials, and has a wide application prospect in the field of photocatalytic treatment of antibiotic and dye wastewater.