486results about "Molybdenum sulfides" patented technology

The invention discloses a molybdenum disulfide and lithium-lanthanum-niobium-oxygen co-coated lithium-rich manganese-based positive electrode material and a preparation method thereof, and realizes double uniform coating of molybdenum disulfide and lithium-lanthanum-niobium-oxygen on the surface of the lithium-rich manganese-based positive electrode material by combining freeze drying and calcining technologies. The double coating layer not only can be used as a stable protective layer to prevent the positive electrode material from being eroded, but also can form a stable coating structure by utilizing the physical and electrochemical compatibility between two adjacent elements of molybdenum and niobium in the same period, so that the electrochemical performance is optimized, the'deoxidation 'phenomenon is avoided, and the service life of the positive electrode material is prolonged. Under co-coating of the molybdenum disulfide and the lithium lanthanum niobium oxide, the lithium-rich manganese-based positive electrode material co-coated with the molybdenum disulfide and the lithium lanthanum niobium oxide is obtained, and the lithium-rich manganese-based positive electrode material co-coated with the molybdenum disulfide and the lithium lanthanum niobium oxide can guarantee the first effect and the specific capacity of the battery and can fully optimize the cycle performance of the battery.

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 discloses a gas-sensitive material for monitoring an environment-friendly gas characteristic substance CO as well as a preparation method and application thereof, and relates to the technical field of gas-sensitive materials. The preparation method comprises the following steps: dissolving tin tetrachloride pentahydrate, sodium hydroxide and polyvinylpyrrolidone, adding ammonium fluoride, reacting at 155-165 DEG C, drying the product, and calcining at 295-305 DEG C to obtain SnO2 nanoparticles; the preparation method comprises the following steps: performing ultrasonic mixing on SnO2 deionized water dispersion liquid and MoS2 nanosheet ethylene glycol dispersion liquid, and then drying to obtain the MoS2 / SnO2 composite material with a mesoporous hollow nanotube structure, and the volume ratio of ethylene glycol to deionized water is (0.9-1.1): 1. The MoS2 / SnO2 gas sensitive material has the advantages of low density, high pore volume, large specific surface area, high structural stability and the like. And when applied to a CO resistive sensor, the catalyst has good CO selectivity, high sensitivity and good long-term stability.

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 belongs to the technical field of two-dimensional materials, and particularly relates to a clean and lossless two-dimensional semiconductor material transfer method. The transfer method comprises the following steps: growing a two-dimensional semiconductor material on a growth substrate, then growing an inorganic protective layer on the surface of a two-dimensional semiconductor, spin-coating an organic polymer support layer, heating and curing, then stripping the growth substrate, transferring the stripped structure to a target substrate, and removing the organic polymer support layer to obtain the two-dimensional semiconductor material. An inorganic protection layer / two-dimensional semiconductor / target substrate structure is obtained, and two-dimensional semiconductor material transfer is completed. The two-dimensional semiconductor material transfer method is simple and easy to implement, clean and lossless transfer of the two-dimensional semiconductor material is achieved, meanwhile, the transferred two-dimensional semiconductor material can be protected against influences of water and oxygen in air, and the original performance of the two-dimensional semiconductor material is reserved to the maximum extent.

The invention relates to a defect-rich cobalt-doped MoS2 / NiSe2 heterojunction nano array electrode as well as a preparation method and application thereof, and belongs to the field of electro-catalysis and new energy materials. The electrode is composed of a self-supporting MoS2 / NiSe2 heterojunction nano array, cobalt atom doping and abundant structure defects are introduced at the same time, and the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) or urea oxidation reaction (UOR) activity of an electrode material in alkaline electrolyte is remarkably improved. The prepared electrode material has the advantages of low cost, high activity, good stability and the like, and has wide application prospects in the fields of water electrolysis, metal-air batteries, domestic sewage treatment and the like.

A molybdenum disulfide material having large lattice spacing and a preparation method therefor, a negative electrode, and a battery. The preparation method for a molybdenum disulfide material having large lattice spacing comprises: reacting a composite solution, in which a sulfur source, a molybdenum source and inducing metal ions are mixed, at a temperature maintained at 200-280°C, thereby obtaining a solid-liquid mixture after the reaction is finished; and separating out a solid substance in the solid-liquid mixture, thereby obtaining a molybdenum disulfide material having large lattice spacing, wherein the inducing metal ions are at least one of germanium ions, iron ions, gallium ions, nickel ions and manganese ions. The negative electrode material is prepared by using the preparation method. The negative electrode is prepared from the negative electrode material. The lithium-ion battery comprises the negative electrode. The molybdenum disulfide material having large lattice spacing prepared by using the preparation method has relatively large lattice spacing, and a battery assembled from a negative electrode prepared from same has relatively good electrochemical performance.

The invention discloses a molybdenum disulfide nanopore chip as well as a preparation method and application thereof, and belongs to the technical field of environmental pollutant detection. The preparation method comprises the following steps: firstly, preparing a PMMA-MoS2 film, and then transferring the PMMA-MoS2 film to the surface of silicon nitride; a helium ion beam etching technology and a scanning electron microscope technology are combined to form the nanopores in the molybdenum disulfide film. The sensor can be used for efficiently detecting a copper (Cu)-thiocyanate compound in an environment, has the characteristics of high sensitivity, quick response and good selectivity, and is suitable for the fields of environment monitoring, pollutant detection and the like.

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 relates to the technical field of lithium ion battery negative electrode material optimization, and discloses a porous carbon coated modified negative electrode material preparation method, which comprises: S1, low temperature pre-carbonization: forming an organic frame structure under the action of a carbon source, a nitrogen doping agent, a structure regulating agent and a sacrificial template; s2, etching to form a graded pore structure, and removing the sacrificial template by adopting a chemical etching method to form a carbon material framework with specific pore distribution; s3, high-temperature carbonization and structure reconstruction: performing high-temperature carbonization in an inert atmosphere to crystallize the carbon material, and optimizing pore distribution through atmosphere regulation and control; and S4, a porosity control method of the negative electrode material, wherein the pore distribution is regulated and optimized through the etching time and atmosphere. The conductivity, the structural stability and the compatibility with electrolyte of the negative electrode material are remarkably improved through cold plasma treatment and a low-temperature sintering technology, and the high-rate discharge capacity and the long-period stability of the battery are enhanced.

The invention discloses a molybdenum disulfide acid leaching purification process, relates to the technical field of molybdenum disulfide purification, and aims to solve the problems of waste acid recycling, wastewater treatment and equipment corrosion in the molybdenum disulfide purification process. The molybdenum disulfide acid leaching purification process comprises the following steps: S1, acid purification: adding a molybdenum concentrate raw material into a reaction kettle; adding reaction acid into the reaction kettle according to a certain solid-to-liquid ratio, heating the reaction kettle to react for a period of time, and cooling to dissolve impurities in the molybdenum concentrate; s2, filter pressing and cleaning: conveying the acid-washed material to a plate frame for filter pressing to form a filter cake, cleaning the filter cake with clear water for 2-4 times until the wastewater is neutral, and conveying the filter cake to the plate frame for filter pressing again; s3, repeating acid purification and filter-pressing cleaning for several times until various acids are used up in the process; and S4, drying: putting the cleaned filter cake into a drying system for drying to obtain the high-purity molybdenum disulfide with the purity of more than or equal to 99%. According to the acid leaching purification process, impurities in molybdenum disulfide are selectively dissolved, the purity of molybdenum disulfide is remarkably improved, and the industrial application requirement is met.

The invention provides molybdenum sulfide powder, a heavy metal adsorbent, a photo-thermal conversion material, a distillation method, an oxygen reduction catalyst and catalyst ink. This molybdenum sulfide powder contains a 3R crystal structure of molybdenum disulfide. The heavy metal adsorbent according to the present invention contains molybdenum sulfide particles having a median diameter (D50) of 10-1000 nm as determined by a dynamic light scattering type particle size distribution measurement device. This photo-thermal conversion material contains a material containing molybdenum sulfide particles, and generates heat by absorbing light energy.

The preparation method comprises the following steps: 1) annealing: placing a molybdenum disulfide raw material on a quartz carrier, and placing the quartz carrier in a temperature zone of a dual-temperature zone tubular furnace; introducing inert gas from the deposition zone to the temperature zone to remove foreign gas; raising the temperature until the temperature of the temperature zone reaches 1185-1195 DEG C, then reducing the temperature, reducing the temperature until the temperature of the temperature zone reaches 995-1005 DEG C, then keeping the temperature for a certain time, and cooling to room temperature; 2) growth: after raising the temperature to 995-1005 DEG C, reversely adjusting the flow direction of the inert gas, and after growing for a certain time, obtaining double-layer corner molybdenum disulfide; the prepared double-layer corner molybdenum disulfide has various angles, has SHG intensity change with high angle dependence, shows novel optical performance, and is beneficial to exploring potential application of a TB-TMD material in nonlinear optics.

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 molybdenum disulfide nanosheet modified urea formaldehyde / melamine resin as well as preparation and application thereof. A preparation method of the molybdenum disulfide nanosheet modified urea formaldehyde / melamine resin comprises the following steps: (1) preparing molybdenum disulfide nanosheets from a sulfur source and a molybdenum source by adopting a hydrothermal synthesis method; (2) carrying out surface functional group modification on the molybdenum disulfide nanosheet by using a surface functional group modifier; (3) carrying out copolymerization reaction on aldehydes, a compound containing polyamido and the molybdenum disulfide nanosheet modified by the surface functional group in the step (2) to obtain molybdenum disulfide nanosheet urea formaldehyde / melamine resin; and (4) modifying the molybdenum disulfide nanosheet urea formaldehyde / melamine resin by using a silane coupling agent to obtain the molybdenum disulfide nanosheet modified urea formaldehyde / melamine resin. According to the method disclosed by the invention, the polymer is copolymerized and grafted onto the molybdenum disulfide nanosheet, so that the problems that urea formaldehyde / melamine resin is insufficient in temperature resistance and poor in pressure resistance after being solidified with a rock core are effectively solved.

The invention relates to a preparation method of a bismuth ferrite-based composite material. The invention aims to solve the problems of poor conductivity and few active sites of the existing bismuth ferrite electrode material, and provides a preparation method of an efficient electro-catalytic hydrogen evolution catalyst. According to the method, bismuth nitrate, ferric chloride, ethylene glycol, ammonia water, sodium hydroxide, thiourea, ammonium molybdate and cobalt nitrate are used as raw materials, a two-step hydrothermal method is adopted, the bismuth ferrite-based cobalt-doped molybdenum disulfide composite material is prepared, and the preparation method is provided for improving the electro-catalytic hydrogen evolution performance of existing bismuth ferrite.

The invention belongs to the field of material preparation, and particularly relates to a 2H-phase molybdenum disulfide crystal and a preparation method and application thereof. Comprising the following steps: mixing potassium molybdate and powdered sulfur, grinding, sintering in an Ar / H2 mixed atmosphere, and cooling to room temperature to obtain a product A; mixing the product A with sulfur powder, grinding, sintering in an Ar / H2 mixed atmosphere, and cooling to room temperature to obtain a product B; and sintering the product B in an Ar / H2 mixed atmosphere, cooling to room temperature, washing, and drying to obtain the 2H-phase MoS2 crystal. According to the preparation method disclosed by the invention, the purity and the crystal integrity of the 2H-phase MoS2 crystal are remarkably improved, and meanwhile, the interlayer spacing of the 2H-phase MoS2 crystal is optimized; in addition, the 2H-phase MoS2 crystal disclosed by the invention is used as a catalyst of a Li-CO2 battery positive electrode material, so that the electrochemical performance and the energy conversion efficiency of a Li-CO2 battery are remarkably improved.

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.

Disclosed in the present invention are a catalyst for hydrogen production by means of methanol reforming, and a preparation method therefor and the use thereof. The catalyst is a metal-loaded porous two-dimensional molybdenum sulfide material, wherein the size of the two-dimensional molybdenum sulfide is 2-100 nm; and the metal is distributed at edge sites of the two-dimensional molybdenum sulfide in a monoatomic state. In the present invention, molybdenum sulfide is synthesized on a template by using a hard template method; the molybdenum sulfide has rich edge sites after the template is removed; after the molybdenum sulfide is further modified with a metal and subjected to a reduction gas treatment, the loaded metal is distributed in a monoatomic state; and the catalyst exhibits relatively good activity during a reaction of hydrogen production by means of methanol reforming. The present invention solves the problems of low activity and poor stability of the existing catalytic system, and achieves the balance of high activity and high stability; and the provided catalyst for hydrogen production by means of methanol reforming has the characteristics of a high mass specific activity, good stability, etc., and has good industrial application prospects and commercial values.

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.

The invention discloses a method for synthesizing metastable-phase molybdenum disulfide based on a deep eutectic solvent (DES) and a water system, and aims to provide a simple and low-cost method for synthesizing the metastable-phase molybdenum disulfide, and high-quality metastable-phase molybdenum disulfide can be prepared at lower input cost by optimizing reaction conditions and a reaction system. Compared with the traditional method, the process provided by the invention has mild reaction conditions, low raw material cost and simple operation steps, not only effectively reduces the production cost, but also improves the feasibility and repeatability of operation. According to the method, the morphology, the size and the dispersity of the metastable-phase molybdenum disulfide micro-nano sheet layer can be accurately regulated and controlled, and the performance stability of the product in different applications is ensured. By controlling the size and dispersion degree of the lamellas, the dependence on expensive noble metal (such as platinum) catalysts can be reduced to a certain extent, and a more economical and efficient alternative scheme is provided for the fields of catalysis, energy storage and the like.

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 the technical field of adsorption materials. The invention provides a preparation method of a molybdenum disulfide loaded biochar binary adsorbent, which takes modified straw biochar (MBC) as a carrier, and successfully synthesizes a MoS2 nano-powder loaded biochar (MBC) binary adsorbent through an ultrasonic method and a one-step hydrothermal method. According to the technical scheme, the acting force between the prepared binary adsorbent and antibiotic molecules is higher, and the adsorbability to the antibiotic molecules is higher; wherein the introduction of MBC also effectively improves the disadvantage of easy hydrophobic agglomeration of MoS2, at the same time, the equilibrium adsorption time is shortened by nearly 3 times, the equilibrium adsorption capacity is improved by about 15%, and the quinolone antibiotics can be effectively removed under neutral and acidic conditions, so that the method has wide application prospects in the aspect of removing quinolone antibiotic pollutants.

The invention belongs to the field of two-dimensional material preparation, and particularly relates to a dry transfer method of a corner two-dimensional material. On one hand, introduction of impurities is avoided by adopting a plurality of organic polymers for assistance through a splitting step mechanism; on the other hand, by means of the mechanism that the two-dimensional material slides on the h-BN interface and does not exceed the plane geometrical shape of the h-BN interface, the two-dimensional material is locked on the h-BN geometrical interface through laser cutting, the probability that the two-dimensional material wrinkles, bubbles and slides in the transfer process is remarkably reduced, meanwhile, the internal stress of a system is reduced, and the mechanical performance of the system is improved. Therefore, the accuracy of the transfer angle of the corner two-dimensional material is improved; and the phenomena of slippage, traction and the like do not occur between the corner two-dimensional materials, lattice distortion is also weakened, and the quality of the corner two-dimensional materials is further improved. According to the method, reliable technical support is provided for constructing a high-quality strong-correlation physical platform, and the method can be widely applied to the fields of novel quantum devices and the like.

The present invention relates to the technical field of secondary battery energy storage, and in particular to a MoS2 / C composite material based on alkylamine intercalation and its preparation method and application, the method comprising: dispersing molybdate and thiourea in deionized water, adding hydrochloric acid, stirring and performing a first hydrothermal reaction; mixing the sample obtained by the first hydrothermal reaction with hydrochloric acid, adding an alkylamine compound, performing a second hydrothermal reaction, and obtaining a MoS2 / C precursor; drying and sintering the MoS2 / C precursor to obtain a MoS2 / C composite material. The composite material prepared by the preparation method of the present invention has a stable and reliable support structure, which can prevent the structural deterioration of molybdenum disulfide and significantly improve the conductivity of electrons. A double continuous channel is established between ions and electrons, which greatly solves the demand for efficient sodium ion storage.

The present invention provides a molybdenum disulfide nanozyme and a preparation method and application thereof, and relates to the technical field of nanomaterials; the preparation method of the molybdenum disulfide nanozyme comprises using a hydrothermal method to evenly mix a molybdenum source, a sulfur source and a structure directing agent, and then performing a hydrothermal reaction to obtain the molybdenum disulfide nanozyme, wherein the molybdenum source is a MoO2(OH)(OOH) solution. The MoS2 nanozyme provided by the technical solution of the present invention has good stability in a wide pH range (3-11), and in particular, it not only has no toxic effect on cells within the experimental dosage range, but also can protect cells, has a good anti-oxidative stress effect, can significantly reduce the ROS level in cells, increase the activity of SOD in cells, reduce the MDA content in cells, and can safely and efficiently remove oxygen free radicals.