367results about "Molybdenum sulfides" patented technology

The invention belongs to the technical field of biomedical engineering, and particularly relates to a single-base resolution laminated two-dimensional material nanopore structure, a DNA sequencing device and a DNA sequencing method. The two-dimensional material nanopore structure comprises an insulating layer and conducting layers arranged on the upper side and the lower side of the insulating layer, through nanopores are formed in the insulating layer and the conducting layers, and the pore diameter of the nanopores is 2-5 nm; the insulating layer and the conductive layer are made of two-dimensional materials. The conductive layers on the two sides serve as upper and lower electrodes, and a power supply is connected between the upper and lower electrodes to form a phase conductive path which is provided with a longitudinal current detection element. A plurality of groups of two-dimensional material nanopore structures are stacked, and meanwhile, a plurality of groups of base pair signals are obtained. According to the invention, the advantages of small thickness, high physical strength and the like of the two-dimensional material nanopore are kept by using a few layers of two-dimensional material films, the vibration of the films is reduced by increasing the number of layers and improving the mechanical strength, so that the signal-to-noise ratio is improved, and the spatial resolution of the nanopore sensor is improved by designing the upper electrode and the lower electrode.

The invention provides application of molybdenum disulfide nanoparticles in preparation of a tomato leaf fertilizer, and particularly relates to the technical field of tomato fertilizers. The molybdenum disulfide nano-particles act on tomato plants in a foliage spraying manner, so that the growth of the tomato plants is promoted and / or the fruit quality is improved. The molybdenum disulfide nanoparticles are used as the foliar fertilizer to significantly increase the plant height and stem diameter of tomatoes, increase the chlorophyll content and trace element content of plants, increase the vitamin C content, soluble sugar content and soluble solid content of tomato fruits, and significantly increase the accumulation of Mo and S of plants through the sulfur-molybdenum synergistic effect, so that the yield of the tomatoes is increased. A scientific basis is provided for reasonable application of the nano molybdenum fertilizer, and a way is opened up for high-yield and high-quality cultivation of tomatoes.

The invention discloses an application of a molybdenum disulfide-based piezoelectric catalytic material in a seawater uranium extraction material, and relates to the technical field of seawater uranium extraction, thiourea and sodium molybdate are used as precursors, and a MoS2 nanoflower with a specific 1T / 2H composite crystal structure is constructed through a hydrothermal synthesis technology. The method is placed in a uranyl nitrate solution, ultrasonic treatment is combined, efficient extraction of uranium can be achieved, and the method has potential application to extraction of uranium from seawater. The method is simple in process and environment-friendly, almost does not generate harmful waste in the synthesis process, does not need complex operation, and has good amplification preparation potential.

The invention provides a preparation method of a molybdenum disulfide material with a biological fine hierarchical structure form, and relates to the technical field of nano materials, and the preparation method comprises the following steps: preparing a biological wing as a biological template; pretreating the biological template by using an ethylenediamine tetraacetic acid solution; molybdenum disulfide grows on a pretreated biological template through a hydrothermal method, and the molybdenum disulfide material of the biomorphic fine hierarchical structure is obtained. Organisms with fine hierarchical structures existing in the nature in quantity serve as the template, and the molybdenum disulfide material of the fine hierarchical structure is prepared through the hydrothermal method; the prepared metal material inherits the fine structure characteristics of an original biological template and has wide application value in the fields of photoelectron, photocatalysis and magnetic performance, compared with the original biological template, the thickness of the molybdenum disulfide layer can be further controlled by adjusting the hydrothermal time and temperature of a hydrothermal method, and the preparation method is simple and easy to implement. The molybdenum disulfide material with the multi-scale graded fine structure and different biological morphological structures is prepared.

To provide glass fiber yarn and a method for manufacturing the same.SOLUTION: A method for manufacturing glass fiber yarn comprises a coating step of coating a molybdenum compound on the surfaces of inorganic particles to form the surface-treated inorganic particles; a sintering step of sintering the surface-treated inorganic particles on a temperature condition of 400 to 1,000°C in a nitrogen gas atmosphere; a mixture step of mixing the surface-treated inorganic particles into a molten glass raw material; and a spinning step of spinning the molten glass raw material including the surface-treated inorganic particles to form glass fiber yarns.SELECTED DRAWING: Figure 1

The invention relates to the technical field of new energy materials, in particular to a thermoelectric composite material and a preparation method and application thereof.The thermoelectric composite material comprises 2D TMDs, a P-type semiconductor polymer and a conductive polymer, the P-type semiconductor polymer and the conductive polymer are cross-linked to form a composite conductive polymer, and the 2D TMDs are dispersed in the composite conductive polymer. The composite conductive polymer has the effects of forming a thermoelectric loop, regulating and modifying the interface of the 2D TMDs and protecting the 2D TMDs dispersed in the composite conductive polymer, and the 2D TMDs and the P-type semiconductor polymer convert heat energy into electric energy under the Seebeck effect. The thermoelectric building material additive comprises a thermoelectric composite material combined on an inorganic silica gel carrier. The thermoelectric cement-based material comprises cement and a thermoelectric building material additive. The thermoelectric cement-based material has good thermoelectric performance, stability and durability, and is suitable for scenes with obvious temperature difference or urgent energy recovery requirements.

The invention discloses a preparation method of an efficient lithium oxalate lithium supplement agent, and relates to the field of preparation of lithium ion battery positive electrode lithium supplement agents, and the preparation method comprises the following steps: S1, adding CNTs into an organic solvent for ultrasonic cleaning, then cleaning the CNTs with pure water, and finally drying; s2, concentrated sulfuric acid and concentrated nitric acid are prepared into a mixed acid solution, CNTs are added, and ultrasonic reflux is carried out; then cleaning the CNTs until the washing water is neutral, and finally drying to obtain oxidized CNTs; s3, the oxidized CNTs and (NH4) 2MoS4 are dissolved in water, then the precursor solution is atomized into micron-sized liquid drops, the micron-sized liquid drops are cracked in an inert atmosphere, and a three-dimensional composite material MoSx-CNTs is prepared; and S4, dissolving the three-dimensional composite material MoSx-CNTs and lithium oxalate in an ethanol solution, and drying in an inert atmosphere in a high-pressure spray dryer to obtain the lithium oxalate-coated MoSx-CNTs composite material. According to the invention, low-voltage and efficient decomposition of lithium oxalate is realized by regulating and controlling metal nodes and pore structures of MOFs, and meanwhile, the damage of residues to the microstructure of the battery is avoided.

The invention discloses a flexible substrate material doped with a two-dimensional material and a preparation method of a sensor of the flexible substrate material, and belongs to the technical field of array sensors. The electrode material comprises a two-dimensional material substrate, a composite doping atom layer and an insulation isolation layer, high-density defect sites are formed through H2 plasma processing, uniform distribution of doping atoms is achieved in combination with atomic layer deposition, and an electrode and a temperature-sensitive layer are precisely integrated through the self-alignment photoetching technology. According to the scheme, the electronic structure of the two-dimensional material is optimized through the composite doping synergistic effect, the multi-layer heterojunction design and the high-precision preparation process are combined, the response capacity of the electrode to weak pressure signals is remarkably improved, and high resolution and stability of the sensor in pressure and temperature detection are achieved. The method has a wide application prospect in the fields of wearable equipment, medical monitoring, robot tactile perception and the like.

The invention belongs to the technical field of lubricating oil manufacturing, and relates to composite lubricating oil used in an aluminum rolling process, which comprises the following components in parts by mass: 94-96 parts of base oil, 0.5-1.5 parts of an oiliness agent, 0.5-0.8 part of an extreme pressure anti-wear agent, 0.5-1.5 parts of a wear-resistant antioxidant, 0.5-2 parts of oleic acid diethanolamide and 0.5-1 part of an antirust agent. On the basis of the prior art, nano-sheet molybdenum disulfide is introduced and added into 2-aminoterephthalic acid and nickel nitrate to react to prepare a modified metal organic framework, then carnosic acid is grafted through an amide reaction to prepare the wear-resistant antioxidant, and a protective film can be formed on a friction interface through a sheet structure of molybdenum disulfide, so that the friction coefficient is reduced; the wear resistance is improved; a compact passive film is formed on the surface of aluminum metal through the synergistic effect of the extreme pressure anti-wear agent and the wear-resistant antioxidant, and the corrosion resistance and wear resistance of the composite lubricating oil used in aluminum plate rolling are improved.

Provided in the present application are a two-dimensional 1T-phase molybdenum disulfide nano material, a preparation method therefor, and the use thereof. The two-dimensional 1T-phase molybdenum disulfide nano material satisfies the following conditions: the monolayer ratio of the molybdenum disulfide is 97% or above, the content of the 1T-phase molybdenum disulfide represented by X-ray photoelectron spectroscopy is 90% or above, and the surface has defects. The monolayer ratio of the two-dimensional molybdenum disulfide nano material being 97% or above indicates that the proportion of monolayer molybdenum disulfide nanosheets in the nano material is very high; the mass content of the 1T-phase molybdenum disulfide being 90% or above indicates that the nano material has good metallicity; and meanwhile, the presence of defects on the surface of the nano material indicates that the nano material has good dispersibility in solvents and also has good electrocatalytic performance, especially having excellent electrocatalytic hydrogen evolution performance under an industrial current density; the catalytic performance of the nano material is better than that of commercial Pt / C and even can be kept stable for 100 h without deterioration; thus, the nano material is one of the most superior non-precious-metal hydrogen evolution catalysts at present.

The invention relates to a hydrogel light-operated multi-mode synergistic treatment platform based on a CuxS-MoS2 heterojunction for promoting wound healing of diabetes mellitus. And an interface induced electric field strategy is provided through density functional theory (DFT) calculation to optimize the charge migration behavior of the phototherapy agent. The multifunctional phototherapy system is constructed by taking CuxS-MoS2 with a built-in electric field as a core and PVA-CS hydrogel loaded with glucose oxidase (GOx) as a bracket. In a weakly acidic wound microenvironment, glucose at the wound is catalyzed by GOx to be converted into H2O2 and gluconic acid; meanwhile, the CuxS-MoS2 remarkably enhances the generation of reactive oxygen species (ROS) under illumination through peroxidase-like (POD) activity, photothermal effect (PTT) and heterojunction efficient carrier separation. After entering a proliferation period, the stent exerts catalase-like (CAT) activity to remove excessive ROS and release oxygen, and oxygen deficit and oxidative stress are relieved. In addition, the controllably released copper ions regulate and control the behavior of fibroblasts, promote healing and inhibit fibrosis. Experiments prove that the stent has excellent biocompatibility, effective antibacterial property and remarkable healing promoting effect in chronic wound repair of diabetes mellitus.

The invention relates to a manganese-directionally-doped CoS2 / MoS2 heterostructure composite material and preparation and application thereof.In the manganese-directionally-doped CoS2 / MoS2 heterostructure composite material, manganese ions are directionally doped on cobalt sites and are not uniformly distributed in a whole heterojunction system, so that the electronic conductivity of CoS2 and the utilization rate of active sites are improved; and meanwhile, the damage to the MoS2 lattice structure is avoided, so that the interface charge transmission capability and the cycling stability of the heterojunction are enhanced. In addition, the electrode material does not need to use a binder or a conductive agent, can be directly applied to various electrochemical energy storage devices such as supercapacitors and the like, and has a good application prospect.

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 discloses a molybdenum disulfide nanosheet / nitrogen-doped bamboo-like carbon fiber tube / sulfur composite material and a preparation method thereof, a lithium-sulfur battery positive electrode and a lithium-sulfur battery, the preparation method comprises the following steps: mixing melamine and aluminum, under the protection of inert gas, reacting for 0.5-4 hours at a high temperature of 900-1500 DEG C, soaking the obtained reactant in an inorganic acid solution for 2-24 hours, and drying to obtain the molybdenum disulfide nanosheet / nitrogen-doped bamboo-like carbon fiber tube / sulfur composite material. Then dispersing the nitrogen-doped bamboo-like carbon fiber tube material, thioacetamide, sodium molybdate and urea into a solvent, carrying out solvothermal reaction, calcining the obtained reactant in a reducing atmosphere, and finally carrying out sulphitation; the composite material is characterized in that the surface of a hollow bamboo-like nitrogen-doped bamboo-like carbon fiber tube is coated with a flaky molybdenum disulfide nanosheet, sulfur is loaded on the flaky molybdenum disulfide nanosheet, the composite material is used as an active material to prepare a lithium-sulfur battery positive electrode, and then a lithium-sulfur battery is assembled. The lithium-sulfur battery has relatively good cycling stability and rate capability.

The application discloses a transfer method of a two-dimensional material film, which comprises the following steps: coating photoresist on the surface of a two-dimensional material film directly grown on a growth substrate and solidifying the photoresist to form a transfer medium layer; separating the growth substrate from the transfer medium layer / two-dimensional material film; after the transfer medium layer / two-dimensional material film is attached to a target substrate, heating is performed to melt the transfer medium layer; and the transfer medium layer is removed. The transfer method of the application utilizes the characteristic that the photoresist can be softened at a low melting point after being solidified, and firstly solidifies the photoresist on the surface of the two-dimensional material film to be transferred to serve as a support medium for the transfer of the film, so that the transfer of the film is realized. After being transferred to the target substrate, the solidified photoresist can be softened, so that the transferred two-dimensional material film can be fully contacted with the target substrate, and the complete and intact transfer of the two-dimensional material film can be realized. The transfer method of the application is especially suitable for the transfer to a rough target substrate.

The invention discloses an electrochemical method for regulating and controlling the phase, resistance and magnetism of a two-dimensional layered material, and belongs to the field of two-dimensional transition metal chalcogenide. The electrochemical method comprises the steps that an electrode system is provided, the electrode system comprises a working electrode and a counter electrode, the working electrode comprises a two-dimensional layered material, the chemical formula of the two-dimensional layered material is MX2, M represents a transition metal element, and X represents a group VI element where a sulfur element is located; providing an electrolyte, wherein the electrolyte is a soluble salt solution containing magnetic transition metal ions; the electrode system is placed in the electrolyte, and under the action of an external electric field, the magnetic transition metal ions are embedded and separated from the two-dimensional layered material, so that the phase, the resistance and the magnetism of the two-dimensional layered material are synergistically regulated and controlled. According to the technology, magnetic transition metal ions are driven by an electric field to be reversibly embedded into and separated from a two-dimensional layered material, so that the phase, the resistance and the magnetism of the two-dimensional layered material are synergistically and dynamically regulated and controlled, and the problems that the traditional external field regulation and control dimension is single, and intrinsic physical property coupling change is difficult to realize are solved. And multi-physical-property combined regulation and control is realized by adjusting an electric field, so that a basis is provided for application of the material in the fields of photoelectric devices, magnetoelectric storage, sensors and the like.

The application belongs to the technical field of electrochemical energy storage materials, and discloses application of a sulfide-based hollow nanobrick heterojunction anode coating material and a preparation method thereof, in particular, application of the sulfide-based hollow nanobrick heterojunction anode coating material to an aqueous zinc ion battery, wherein the sulfide-based hollow nanobrick heterojunction comprises an X metal sulfide and a Y metal sulfide, and the heterojunction is represented as XS-YS n , 0 < n < 3, X is Zn, and Y is selected from one of Sn, Co, Cu or Mo; the preparation method comprises the following steps: mixing a zinc salt and a fluoride etchant, and one of a tin salt, a cobalt salt, a copper salt or a molybdenum salt, and then performing a hydrothermal reaction to obtain a bimetal-based hollow nanobrick precursor; and then performing sulfurization calcination to obtain the XS-YS n . The sulfide-based hollow nanobrick heterojunction can effectively inhibit zinc dendrite growth and interface side reactions, thereby significantly improving the electrochemical stability of the material, and further prolonging the cycle life of the aqueous zinc ion battery.

The present invention provides functionalized molybdenum disulfide nanosheets and a preparation method and application thereof. The preparation method comprises the following steps: mixing a solvent, 1 part by weight of thioctic acid, and 5 to 10 parts by weight of a first compound for 2 to 4 hours to obtain a mixture; adding 0.05 to 0.1 parts by weight of 1-hydroxybenzotriazole to the mixture, mixing for 24 to 48 hours, and drying to obtain an intermediate product; and ultrasonically treating or heat-treating the raw material-solution system to obtain the functionalized nanosheets, wherein the raw material-solution system comprises 5 to 10 parts by weight of molybdenum disulfide nanosheets, 1 part by weight of the intermediate product, and brine; and the first compound comprises an oxirane group and an alkylamine chain, wherein the alkylamine chain has 12 to 18 carbon atoms and the oxirane group has 2 to 15 carbon atoms. A nanofluid prepared from the functionalized molybdenum disulfide nanosheets can reduce oil / water interfacial tension, has good stability, significantly improves the recovery rate of low-permeability oil reservoirs, and reduces costs.

According to the lithium ion battery electrode material and the preparation method thereof, a composite material with molybdenum sulfide nanoparticles loaded on the surfaces of porous microspheres Ce-lambda-MnO2 is prepared through a two-step hydrothermal method, the porous structure provides a large number of active sites, the reversible capacity is improved, electrolyte permeation is promoted, and the performance of the lithium ion battery electrode material is improved. The wettability of the electrolyte on an electrode material is improved, and the lithium ion transmission rate is increased; by doping manganese dioxide with Ce, additional free electrons can be introduced, the band gap of MnO2 can be reduced, the electron mobility can be enhanced, lambda-MnO2 and MoS2 are compounded, and after a heterojunction structure is formed by the lambda-MnO2 and the MoS2, the conductivity and the capacity performance are further improved, the preparation process is simple, the price is low, and the preparation method has an industrialization prospect.

The invention discloses an electrolytic bath for directly producing hydrogen from seawater and a method for directly producing hydrogen from seawater, and relates to the technical field of seawater electrolysis hydrogen production. The electrolytic cell is of a double-layer partition structure, seawater with the salinity of 20-35 g / L (the conductivity is 30-50 mS / cm) is directly introduced into an anode high-salt area, and the conductivity of a cathode low-salt area is maintained to be lt; and a dynamic adjustment membrane (DAM, the thickness is 100 microns, and the aperture is 0.5-1 micron) is arranged in the membrane to control ion permeation. The anode uses an IrO-MoS2 composite catalyst (the proportion of IrO2 is 20%), the cathode uses MoS2 (the loading capacity is 2.0 mg / cm < 2 >), the operation voltage is 1.8-2.3 V, the current density is 0.8-1.6 A / cm < 2 >, and the temperature is 40-60 DEG C. According to the device, the H2 yield is 2.0-2.3 L / min, the efficiency is 85-90%, and the service life is gt; in 6000 hours, a Cl2 by-product 1t is obtained; and 0.05%. The method is free of pretreatment, high in corrosion resistance and suitable for green hydrogen energy production in coastal areas.

The invention relates to the technical field of electrochemical energy storage materials, in particular to a few-layer Ti3C2 heterostructure constructed by a bifunctional molecular bridge technology as well as a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing 11-aminoundecanoic acid (AUAm), (NH4) 6Mo7O24. 4H2O, a few-layer transition metal carbide solution (FLM) and CH4N2S with water, and carrying out hydrothermal reaction to obtain a few-layer Ti3C2 heterostructure material. The molecular bridge designed by the invention has a bifunctional characteristic, the-NH2 group of the molecular bridge can be inserted between MoS2 layers to expand the interlayer spacing, the-COOH group of the molecular bridge and-OH on the surface of FLM form a covalent bond, the in-situ growth of intercalated MoS2 on few-layer metal carbide is realized, the construction of an FLM / AUAm / MoS2 heterostructure is promoted, and the material designed by the technology can be used as a supercapacitor electrode material and has a wide application prospect. The excellent electrochemical performance is shown.

The invention discloses a simulation oscillator for a water intercalation stripping method of a two-dimensional material, the simulation oscillator is used for stripping dense and difficult-to-disperse solid precipitate tightly attached to the wall of a centrifuge tube, a power system output shaft of a simulation oscillator host is hinged with a crank rocker reciprocating assembly, the crank rocker reciprocating assembly is connected with a tube clamp assembly, and the tube clamp assembly is connected with a tube clamp. At least one test tube is installed on the tube clamp assembly, the power system operates to drive the crank rocker reciprocating assembly to swing and oscillate in a reciprocating mode, and the manual reciprocating oscillation action is simulated for the tube clamp assembly. The device has the advantages that the action of manual oscillation is simulated, uniform and mild reciprocating oscillation is realized, and the special requirement on the oscillation mode in the material treatment process is met.

The application discloses a preparation method of a suspended two-dimensional material film and the suspended two-dimensional material film. The preparation method comprises the following steps: providing a substrate, wherein the substrate has a first surface and a second surface opposite to each other; forming a sacrificial layer film on the first surface of the substrate; forming a through hole on the second surface of the substrate, and the through hole exposes the sacrificial layer film; obtaining a two-dimensional material film, transferring the two-dimensional material film to the sacrificial layer film, and the two-dimensional material film covers the through hole; etching the sacrificial layer film from the second surface of the substrate until the two-dimensional material film is exposed, and a suspended two-dimensional material film is formed. The preparation method of the suspended two-dimensional material film and the suspended two-dimensional material film have the advantages that the two-dimensional material film has low transfer difficulty, the light source has little influence on the test, and the test means is effectively widened.

A composite product includes molybdenum disulfide particles and palladium particles, in which an average crystallite size of molybdenum disulfide included in the molybdenum disulfide particles determined from a peak of 2θ=14.4°±0.5° obtained by X ray diffraction measurement is 150 nm or less. A catalyst ink includes the composite product and a dispersing medium. A method for producing the composite product includes a step of mixing molybdenum disulfide particles and a palladium solution, in which an average crystallite size of molybdenum disulfide included in the molybdenum disulfide particles determined from a peak of 2θ=14.4°±0.5° obtained by X ray diffraction measurement is 150 nm or less.

The application belongs to the field of antibacterial two-dimensional nanomaterial Mxene catalysts, and particularly relates to a monolayer W@MoS2 nanosheet as well as a preparation method and application thereof. The method comprises the following steps: 1) dissolving water-soluble molybdate and water-soluble tungstate in water to obtain a mixed solution; 2) adding a sulfur source and an organic solvent to the mixed solution, and then performing reaction after mixing, and drying to obtain a powder. The monolayer W@MoS2 nanosheet has a unique two-dimensional planar structure, a large specific surface area, and good optical and electronic properties, and has high light-heat absorption in the near-infrared two region, i.e., the light-heat conversion efficiency is improved. Meanwhile, the peroxidase-like activity of the monolayer W@MoS2 nanosheet material realizes efficient light-heat amplification, can treat methicillin-resistant Staphylococcus aureus infection, and avoids heat therapy damage to normal tissues.

A molybdenum trioxide powder, which contains an aggregate of primary particles comprising a crystal structure of molybdenum trioxide, the crystal structure comprising α-crystals having an average crystallite size of 50 nm or less. The median particle diameter D50 of the primary particles, which is obtained by a dynamic light scattering method, is 2000 nm or less. 50 is 2000 nm or less.

The invention belongs to the technical field of sodium-ion batteries, and relates to a sodium-ion battery negative electrode material, in particular to a molybdenum sulfide / carbon composite material with a gradient structure and a preparation method and application thereof. The preparation method comprises the following steps: uniformly stirring resorcinol, formaldehyde and tetrapropoxysilane under an alkaline condition to obtain phenolic resin / silicon nanospheres; calcining again to obtain crystalline carbon / silicon dioxide nanospheres; then selectively etching to remove the silicon dioxide component to obtain a three-dimensional carbon sphere carrier with a gradient pore structure; mixing the three-dimensional carbon sphere carrier with a sulfur source and phosphomolybdic acid in a solution, and obtaining a MoS2 (at) C precursor by adopting a vacuum impregnation growth method; and carrying out secondary calcination on the MoS2 (at) C precursor under an inert atmosphere condition to obtain the MoS2 (at) C / MoS composite material. The molybdenum sulfide / carbon composite material prepared by the invention has a unique structure, so that the molybdenum sulfide / carbon composite material has good electrochemical stability, excellent rate capability, high specific capacity, large specific surface area and more reaction sites when being used as a negative electrode material of a sodium-ion battery.

The invention provides a lithium battery negative electrode material MoS2 and a preparation method and application thereof.The preparation method comprises the following steps that S1, sodium molybdate dihydrate is taken and added into a glucose solution, thiourea is added after dissolution, dissolution continues, and a solution before reaction is obtained; the mass volume ratio of the sodium molybdate dehydrate to the thiourea to the glucose solution is 1g: (2-3g): (40-50mL); s2, transferring the solution before reaction into a polytetrafluoroethylene hydrothermal kettle, sealing, carrying out hydrothermal reaction at 180-200 DEG C for 12-36 hours to obtain a black precipitate, and carrying out ultrasonic treatment, cleaning and drying on the black precipitate to obtain a black product; and S3, in an inert gas atmosphere, carrying out annealing treatment on the black product, and cooling to obtain the MoS2 material. The MoS2 nanoflower prepared by the preparation method disclosed by the invention, as a negative electrode material of a battery, shows excellent cycling stability, rate capability and excellent morphological characteristics in the aspect of a battery material, shows excellent electrochemical performance, and provides reliable support for application of the MoS2 nanoflower in the field of batteries.

A system and method for performing is laser induced forward transfer (LIFT) of 2D materials is disclosed. The method includes generating a receiver substrate, generating a donor substrate, wherein the donor substrate comprises a back surface and a front surface, applying a coating to the front surface, wherein the coating includes donor material, aligning the front surface of the donor substrate to be parallel to and facing the receiver substrate, wherein the donor material is disposed adjacent to the target layer, and irradiating the coating through the back surface of the donor substrate with one or more laser pulses produced by a laser to transfer a portion of the donor material to the target layer. The donor material may include Bi2Se(3-x)Sx, MOS2, hexagonal boron nitride (h-BN) or graphene. The method may be used to create touch sensors and other electronic components.

A molybdenum trioxide powder contains an aggregate of primary particles having a β crystal structure of molybdenum trioxide. The molybdenum trioxide powder has a MoO3 content ratio of 99.6% or more measured by X-ray fluorescence (XRF), and has an average particle diameter of the primary particles of 1 μm or less. A method for producing the above molybdenum trioxide powder includes vaporizing a molybdenum oxide precursor compound to form molybdenum trioxide vapor, and cooling the molybdenum trioxide vapor.