694results 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 provides an alkaline ion battery negative electrode material as well as a preparation method and application thereof, and particularly relates to an MXene / MoS2 / TiO2 composite material which is prepared by the following steps: etching an MAX phase by using mixed acid containing HF to obtain MXene; performing freeze drying to obtain powder containing MXene, a Mo source and an S source; and calcining to obtain the composite material. According to the negative electrode material disclosed by the invention, MoS2 is supported by utilizing high conductivity of MXene and structural collapse of the MoS2 is relieved, and TiO2 enhances cycle stability, is designed for a negative electrode of an alkaline ion battery and shows good cycle performance. MXene is obtained by etching an MAX phase with mixed acid, the composite material is prepared by combining freeze drying and calcination, NH prevents MXene from stacking and expands interlayer spacing, MoS2 is formed after calcination, and a small amount of TiO2 is generated in situ. And the single-layer MXene is used as a binder to replace a traditional material, so that the electrochemical performance of the composite electrode is improved.

The invention relates to a low-temperature graphite negative electrode material and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the prepared low-temperature graphite negative electrode material, firstly, the surface of graphite is pre-oxidized through potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, and then under the action of sodium nitrate, potassium permanganate and hydrogen peroxide, graphite oxide is prepared; then, ammonium molybdate hydrate and thioacetamide are used as a molybdenum source and a sulfur source, graphite oxide is used as a supporting material, a molybdenum disulfide-graphite compound is synthesized, and the conductivity and the cycling stability are improved; secondly, the surface of the negative electrode is coated with amorphous resin carbon / nickel oxide, so that the ion diffusion efficiency of the low-temperature graphite negative electrode material is enhanced, and the electrochemical lithium storage performance is improved in a low-temperature environment; and finally, the surface of the amorphous resin carbon / nickel oxide is coated with a layer of polythiophene film, so that the rate capability of the negative electrode material is improved due to large surface area and high pores.

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 provides a NiS < x > / MoS2 composite material, a preparation method and application, and relates to the technical field of electromagnetic microwave materials, a Ni-Mo precursor nanosheet prepared from a molybdenum source and a nickel source is self-assembled to form 3D nano flower balls, the 3D nano flower balls and a sulfur source are subjected to a vulcanization reaction to prepare the NiS < x > / MoS2 composite material, and the NiS < x > / MoS2 composite material is a NiS / MoS2 composite material or a NiS / NiS < 2 > / MoS2 composite material; the preparation method comprises the following steps: S1, dissolving a molybdenum source, a nickel source and hexamethylenetetramine in water, and fully stirring to obtain a uniform solution; s2, the solution is subjected to a hydrothermal reaction, precipitates are taken out and subjected to washing and drying treatment, and a Ni-Mo precursor is prepared; and S3, the Ni-Mo precursor and a sulfur source are subjected to annealing treatment, and the NiS < x > / MoS2 composite material is prepared. In the vulcanization process, along with heterogeneous forming, violent movement of surface charges, a strong polarization effect caused by multiple heterogeneous interfaces, sulfur vacancies and other defects, the polarization loss capacity of the NiSx / MoS2 composite material is remarkably improved, the NiSx / MoS2 composite material is applied to the field of electromagnetic wave absorption, multiple reflection and scattering of electromagnetic waves are facilitated, and the electromagnetic wave absorption efficiency is improved.

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 relates to the technical field of sodium / lithium ion battery negative electrode materials, and discloses a molybdenum-based negative electrode material and a preparation method and application thereof.The molybdenum-based negative electrode material comprises a nitrogen and sulfur co-doped carbon nano short rod, and the carbon nano short rod is filled with a core-shell type molybdenum-based nano roll; the core-shell type molybdenum-based nano roll comprises a molybdenum dioxide core and a molybdenum disulfide shell layer with a bent structure, and the number of the molybdenum disulfide layers is 12-35. The molybdenum-based negative electrode material provided by the invention is composed of a carbon nano short rod coating layer and a core-shell type MoO2-MoS2 nano roll filled in the carbon nano short rod coating layer; the MoO2-MoS2 nano-roll is obtained by homologous conversion of MoO3 nano short rods and has unique core-shell structure characteristics, and the MoO2-MoS2 nano-roll and the MoO3 nano short rods form a large number of heterogeneous interfaces to provide abundant reaction active sites for storing sodium ions or lithium ions and accelerating electrochemical reaction kinetics; according to the present invention, the MoS2 shell layer has the bending structure characteristic, and the number of the MoS2 layers is controlled to 12-35 through the confinement pyrolysis temperature and the sulfur-containing initiator consumption so as to obtain the excellent sodium / lithium storage performance, and the excellent rate performance and the excellent cycle stability are provided when the MoS2 / lithium battery is used;

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 discloses a method for producing a lubricating product by using tungsten-molybdenum resources, and relates to the technical field of tungsten-molybdenum resource utilization, and the method comprises the following steps: adjusting the mass ratio of Mo to WO3 in the tungsten-molybdenum resources to 10: (2-8), crushing, and roasting to obtain a roasted material; adding ammonia water into the roasted material for size mixing, and performing oxygen pressure ammonia leaching; sulfuric acid is added into the leachate for acid precipitation, and precipitates are obtained; introducing hydrogen sulfide gas to sulfurize the precipitate to obtain thioammonium salt; adding hydrochloric acid into the thioammonium salt for acidification reaction to obtain trisulfide; calcining the trisulfide in a protective atmosphere; and crushing the calcined material to obtain the product. According to the invention, a mixture of tungsten disulfide and molybdenum disulfide is obtained by utilizing a large amount of tungsten-molybdenum paragenic ore or a tungsten-molybdenum-containing waste catalyst in nature through a hydrometallurgy process, and can be used as a solid lubricating material, so that the production cost of the solid lubricating material is effectively reduced, the recovery rate of tungsten in ore is increased, and the environmental pollution is reduced.

The invention discloses an aqueous zinc ion battery positive electrode material and a preparation method and application thereof. The invention particularly relates to a MoS (2-x) Se < x > (at) N-C composite material prepared by an electrostatic spinning technology. The preparation method comprises the following steps: firstly, preparing an electrostatic spinning solution containing a molybdenum source (such as ammonium molybdate or ammonium tetrathiomolybdate), a sulfur source (such as thioacetamide or thiourea) and a selenium source (such as Se powder or SeO2), and preparing a composite prefabricated film containing precursors of the three elements through an electrostatic spinning method; and then, carrying out two-stage calcination treatment on the prefabricated film under set conditions to form the final MoS (2-x) Se < x > (at) N-C composite material. According to the MoS (2-x) Se < x > (at) N-C composite positive electrode material prepared by the invention, interlayer defects are introduced while the interlayer spacing of the material is expanded, so that the zinc storage capacity, the cycling stability and the electrochemical performance of the aqueous zinc ion battery are remarkably improved.

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.