417results about "Molybdeum compounds" patented technology

The invention provides a modified ferric sodium phosphate pyrophosphate positive electrode material and a preparation method and application thereof, the modified ferric sodium phosphate pyrophosphate positive electrode material comprises a ferric sodium phosphate pyrophosphate positive electrode material and a carbon and sodium ion conductor, the carbon and sodium ion conductor is enriched on the surface and grain boundary of the ferric sodium phosphate pyrophosphate positive electrode material in a uniform composite phase, and the sodium ion conductor is NaxMOy. A composite phase material formed by carbon and a sodium ion conductor is used for coating primary particles and secondary particles of the positive electrode material, a three-dimensional conductive / conductive ion network is formed on the grain boundary and the surface of the material, and the charge and ion transmission rate of the material is high; and the three-dimensional coating layer can protect the material from being eroded by electrolyte, the structure stability is good, and the cycle performance and the rate performance of the material are excellent.

The invention provides a lithium-rich manganese-based material for an all-solid-state battery as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing and drying a lithium-rich manganese-based carbonate precursor, a dopant and a first solvent to obtain a doped lithium-rich manganese-based carbonate precursor, and then sintering and washing to obtain a pretreated precursor; and carrying out ball milling on the pretreated precursor, mixing with a lithium source, and calcining to obtain the submicron single crystal type lithium-rich manganese-based positive electrode material, and mixing the single crystal type lithium-rich manganese-based positive electrode material, a metal source coating agent and a second solvent, then removing the second solvent, and roasting to obtain the lithium-rich manganese-based material for the all-solid-state battery. According to the preparation method disclosed by the invention, through internal doping of rare earth ions, design of a submicron single crystal structure and surface in-situ coating, the migration speed of lithium ions and the stability of the crystal structure can be improved, side reactions of an interface are reduced, and the stability of the interface is improved.

The invention discloses a high-initial-efficiency fast-charge graphite composite material and a preparation method thereof, the composite material is of a core-shell structure, the core is graphite, and the shell is lithium sulfonate / lithium molybdate and an amorphous carbon coating layer thereof; the mass ratio of the shell is 5-15 wt% according to the mass ratio of the composite material being 100%. The preparation method comprises the following steps: adding a molybdenum compound into a solvent to prepare a solution, adding graphite oxide, an inorganic lithium salt and a carbon nanotube conductive solution, reacting for 2-12 hours at the temperature of 50-120 DEG C, filtering, carbonizing filter residues to obtain a lithium molybdate conductive agent coated graphite material, and depositing a lithium sulfonate derivative on the surface of the lithium molybdate conductive agent coated graphite material by an atomization method to obtain the lithium molybdate conductive agent coated graphite material. The electron and ion conductivity of the material can be improved, and the rate and the first efficiency of the material can be improved.

The invention discloses a Bi2MoO6-Mo2C-C / C photoelectric catalyst and a preparation method and application thereof.The Bi2MoO6-Mo2C-C / C photoelectric catalyst is characterized in that Bi2MoO6 and Mo2C are compounded on a C / C substrate with a porous C / C material as a carrier through a hydrothermal electric deposition technology, a heterostructure can be formed, the surface is loose and porous, the number of active sites of the composite photoelectric catalyst can be effectively increased, and therefore the oxygen evolution efficiency of the composite photoelectric catalyst is improved; due to the existence of the heterojunction structure, the electron interaction of a two-phase heterogeneous interface can be enhanced, the overall conductivity, adsorption energy and reaction kinetics can be improved, the electron transfer is improved, and the active site density is increased, so that the catalytic performance is effectively improved, the stability is good, the application range is wide, and long-time stable work can be realized; the prepared composite photoelectrode material has high conductivity, adsorption energy, good reaction kinetics, high stability, high adaptability and high oxygen evolution efficiency.

The invention relates to the technical field of reactors, and particularly discloses an ammonium molybdate production reaction device which comprises a shell, a shaft barrel rotationally arranged in the shell and a plurality of base plates arranged on the shaft barrel in a sliding mode, a reciprocating lead screw fixedly connected with the shell is coaxially arranged in the shaft barrel, and sliding holes matched with the base plates are formed in the shaft barrel in the axial direction of the shaft barrel. A sliding block rotationally connected with the base plate is arranged in the sliding hole in a sliding mode, the reciprocating lead screw can drive the sliding block to move up and down, a first plate and a second plate are arranged on the base plate in a sliding mode, a shaft rod used for driving the first plate and the second plate to move is rotationally arranged in the base plate, a plurality of stirring rods are arranged in the base plate, and baffles are arranged at the two ends, in the axial direction of the shaft rod, of the first plate and the second plate correspondingly. Swing plates are rotationally arranged at the lower ends of the first plate and the second plate through first elastic pieces correspondingly, an upper rack used for driving the shaft rod to rotate and a lower rack used for driving the base plate to rotate are fixedly arranged in the sliding hole, and the upper rack is located above the lower rack.

The invention belongs to the technical field of solid electrolytes, and relates to a selenium-doped sulfide solid electrolyte as well as a preparation method and application thereof. The general chemical formula of the sulfide solid electrolyte is Li < 6 + / -iP < 1-x > MxS < 5-y > SeyX, i is greater than or equal to 0 and less than 1, x is greater than 0 and less than 1, y is greater than 0 and less than 1, M is one or more of Zr, Ta, Nb, Mo, Bi, In and Y, and X is one or more of Cl, Br and F. According to the invention, the selenium element with larger ionic radius and lower electronegativity is introduced to replace the sulfur element, and Zr, Ta, Nb, Mo, Bi, In or Y elements are introduced, so that the doped sulfide solid electrolyte system has excellent stability to air, organic solvents and lithium while ensuring high ionic conductivity, and the assembled all-solid-state battery shows excellent cycle stability.

The invention discloses a method for purifying electronic grade molybdenum dioxide dichloride, which comprises the following steps of: removing low-boiling-point substances by adopting a sublimation method, collecting sublimation gas of which the main component is a target product by adopting sublimation in a fixed temperature interval, then removing substances with different chemical properties and polarities by adopting a complexing and decomplexing method, and finally further removing impurities by sublimation to obtain the electronic grade molybdenum dioxide dichloride. And finally obtaining the electronic grade molybdenum dioxide dichloride with the purity not lower than 7N grade. The method has the characteristics of good purification effect, multi-method comprehensive impurity removal, industrial large-scale application, stable quality, high yield and simple and easy-to-separate impurity components.

The purpose of the present invention is to provide: a copper-chromium oxide spinel having a particle diameter suitable for use in the production of a resin molded article, and having plating bonding properties; a resin composition thereof; a resin molded article; and a method for producing the copper-chromium oxide spinel. Specifically, provided is a copper chromium oxide spinel characterized by containing molybdenum and having a D50 of 2.0 [mu] m or less.

The invention discloses a material for treating inflammatory skin diseases, a preparation method and application, the inflammatory skin diseases comprise psoriasis and atopic dermatitis, and the material comprises cerium substituted molybdenum-based polyoxometallate. The application has the advantages that the CMB has reliable biological safety and excellent active oxygen scavenging capacity, and can effectively inhibit the level of ROS (reactive oxygen species) in cells at lower concentration, so that the inflammation activation of psoriasis or atopic dermatitis is inhibited, and the effect of treating psoriasis or atopic dermatitis is achieved; compared with a water-insoluble inorganic nano material, the CMB material can be dissolved in water, is not easy to retain in local tissues, is more easily metabolized by an organism, and is better in safety.

The invention relates to a samarium molybdate / reduced graphene oxide electro-catalytic material, a preparation method and application thereof and an electrochemical sensor, and relates to the technical field of electro-catalytic materials and electrochemical sensors, the preparation method comprises the following steps: dispersing GO in water, and stirring to obtain a GO suspension; the preparation method comprises the following steps: separately adding Sm (NO3) 3.6 H2O and Na2MoO4. 2H2O into water for ultrasonic dissolution, and mixing to obtain a first mixture; stirring and mixing the GO suspension and the first mixture to obtain a second mixture, and the like. The samarium molybdate / reduced graphene oxide electro-catalytic material is synthesized by a hydrothermal synthesis method and is used for modifying a glassy carbon electrode so as to be applied to electrochemical detection of FZD for the first time. Compared with a traditional detection method, the detection method has the advantages of being simple, efficient, green, environmentally friendly, sensitive in response and portable, and a new way is provided for detection of carcinogenic residues.

A modified lithium-rich manganese-based positive electrode material, and a preparation method therefor and the use thereof. The modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material, wherein the bulk phase of the lithium-rich manganese-based positive electrode material is doped with a high-valent transition metal element, and the surface phase of the lithium-rich manganese-based positive electrode material has a lithium metal compound coating layer and an oxygen vacancy. In the modified lithium-rich manganese-based positive electrode material, the doping with a bulk-phase high-valence transition metal element, the coating with a surface-phase lithium metal compound coating layer and the construction of an oxygen vacancy are conducted at the same time; and by means of the co-action of the three, the rate capability and the cycling performance of the lithium-rich manganese-based positive electrode material can be significantly improved, which is of great significance for the further commercialization of the lithium-rich manganese-based positive electrode material.

The invention provides an amorphous high-entropy sulfide for an aluminum ion battery positive electrode and a preparation method and application thereof, the chemical general formula of the amorphous high-entropy sulfide is MS4, M is selected from at least five metal elements of Li, Mo, Ni, Cu, Mn, W, Ti, Nb, Zr, Zn and La, and at least comprises Mo, Cu, Ti and Nb. The preparation method comprises the following steps: S1, burdening; S2, preparing different types of monometal sulfide precursors by high-energy ball milling; and S3, preparing the amorphous high-entropy sulfide by high-energy ball milling. The high-entropy sulfide prepared by the method is in an amorphous state, and when the high-entropy sulfide is used as the aluminum ion battery positive electrode material, the problems that the positive electrode material in the prior art is insufficient in aluminum ion adsorption, low in storage capacity, complex in preparation condition, difficult to produce on a large scale and the like can be solved. The obtained aluminum ion battery shows good electrochemical performance and has an extremely high commercial application prospect.

The invention relates to the field of waste catalyst recovery, and discloses a method for recovering molybdenum from a waste hydrofining catalyst. The method comprises the following steps: (1) roasting the molybdenum-containing waste hydrofining catalyst in an inert atmosphere; (2) carrying out contact reaction on the roasted product obtained in the step (1) and an alkali solution, and then carrying out microwave treatment under the power of 300-900W to obtain a liquid product; and (3) evaporating and concentrating the liquid product under the condition that the pH value is 10-12 to obtain molybdate crystals. The method can obviously improve the recovery rate of molybdenum.

The invention discloses vacancy heteropolyacid, a preparation method thereof and application of the vacancy heteropolyacid in electrolytic coupling hydrogen production, and belongs to the technical field of catalysts. The preparation method comprises the following steps: by taking phosphomolybdic acid as a raw material, preparing vacancy heteropolyacid by adjusting the pH value to 2-6 or adding high-concentration acid for acidification and heating; the high-concentration acid is 0.1-6 M phosphoric acid or a mixed acid of 0.1-3 M phosphoric acid and 0.1-6 M sulfuric acid or 0.1-1 M perchloric acid. The rate of oxidizing biomass and organic wastewater by the vacancy phosphomolybdic heteropolyacid prepared by the method is 10-20 times of that of complete Keggin type phosphomolybdic acid. The invention further provides an organic wastewater degradation and electrolytic hydrogen production coupling process, vacancy heteropoly acid can be regenerated and recycled, and coupling hydrogen production can be achieved.

An MXene or a derivative thereof, on which nitrous oxide reductase is immobilized, wherein the MXene has a formula of Mn+1XnTs, wherein M is a transition metal of Groups 3, 4, 5, 6, or a combination thereof, of the Periodic Table of the Elements, X is carbon, nitrogen, or a combination thereof, T is oxide, epoxide, hydroxide, C1-C5 alkoxide, fluoride, chloride, bromide, iodide, or a combination thereof, and n is 1, 2, or 3, and s is 0, 1, or 2.

The invention provides a method for short-process all-component echelon recovery of a waste hydrogenation catalyst, and relates to the field of solid waste treatment. The recovery method of the waste hydrogenation catalyst comprises the following steps: roasting the waste hydrogenation catalyst and sodium carbonate to obtain a roasted product; the roasted product is leached with water, and leaching liquid and leaching residues are obtained; extracting the leaching solution by using an extracting agent to obtain a vanadium-molybdenum-containing organic phase, sequentially carrying out reverse extraction treatment on the vanadium-molybdenum-containing organic phase by using a strong alkaline reverse extraction agent and a weak alkaline reverse extraction agent to obtain a vanadium reverse extraction solution and a molybdenum reverse extraction solution, and carrying out vanadium precipitation treatment on the vanadium reverse extraction solution to obtain ammonium metavanadate; acidizing the molybdenum strip liquor to precipitate molybdenum to obtain ammonium molybdate; carrying out sintering treatment on the leaching residues and alkaline substances, leaching obtained calcine with water to obtain water leaching residues and filtrate, and carrying out aluminum precipitation treatment on the filtrate to obtain aluminum hydroxide, aluminum oxide or pseudo-boehmite; and reducing and smelting the water leaching residues to obtain the ferro-nickel alloy. According to the invention, multi-element comprehensive recovery of all components of vanadium, molybdenum, nickel, aluminum and sulfur can be realized, and high-value utilization of all components of the waste hydrogenation catalyst is realized.

Methods of forming a molybdenum silicide layer on a surface of a substrate are disclosed. The method includes disposing a substrate within a reaction chamber, depositing a molybdenum metal layer on a surface of the substrate, and contacting the surface of the molybdenum metal layer with a silicon-containing gas, thereby converting at least a portion of the molybdenum metal layer to a molybdenum silicide layer.

A metal acid compound dispersion containing at least two metals M selected from the group consisting of niobium, tantalum, molybdenum, tungsten, and titanium, said metal acid compound dispersion containing: at least one element X selected from the group consisting of alkali metal elements and / or alkaline earth metal elements; and a phosphorus compound and / or a chlorine compound. The particle diameter (D50) of the particles in the metal acid compound dispersion is at most 1000 nm as obtained by a dynamic light scattering method.

A production process of electronic grade molybdenum dichloride dioxide comprises the following steps: S1, pretreatment: contacting molybdenum trioxide with a dilute acid solution at a low temperature for pickling to remove alkaline impurities and soluble metal impurities adsorbed on the surface, and drying for later use after washing; s2, wet synthesis: in an inert gas atmosphere, reacting the molybdenum trioxide subjected to acid pickling in the step S1 with concentrated hydrochloric acid of which the mass is 4-5 times of that of the molybdenum trioxide at 80-100 DEG C, and after the reaction is finished, evaporating and concentrating in a high-temperature chlorine atmosphere to generate a crude product of dichloromolybdenum dioxide; s3, primary sublimation purification; s4, complexing and decomplexing purification; and S5, secondary sublimation purification: using a quartz sublimation tower to carry out vacuum sublimation on the secondary decomplexed molybdenum dichloride obtained in the step S34, and collecting sublimation condensate to obtain the electronic grade molybdenum dichloride. The final product purity of the production process is greater than or equal to 6N, and the process can be used for large-scale production.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M1]x[M2](1−x)[Nb]y[O]z, wherein: M1 and M2 are different; M1 represents one or more of Ti, Mg, V, Cr, W, Zr, Mo, Cu, Fe, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Te, Se, Si, Sb, Y, La, Hf, Ta, Re, Zn, In, or Cd; M2 represents one or more of Mg, V, Cr, W, Zr, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; and wherein x satisfies 0<x<0.5; y satisfies 0.5≤y≤49 z satisfies 4≤z≤124.

The invention relates to a preparation method of dichloromolybdenum dioxide, which comprises the following steps: S1, putting a raw material metal molybdenum into a reactor, and then vacuumizing the reactor; s2, heating the reactor, controlling the temperature to be 180-600 DEG C, introducing oxygen and hydrogen chloride into the reactor, and reacting for 0.5-3 hours; s3, performing two-stage purification on the reaction product obtained in S2, controlling the temperature of the first-stage purification to be 150-350 DEG C, controlling the temperature of the second-stage purification to be-50-50 DEG C, controlling the pressure to be-0.09-0.05 Mpa, and keeping for 0.5-2 hours; and S4, after the purification is finished, carrying out sampling detection on the dichloromolybdenum dioxide for many times, and collecting the dichloromolybdenum dioxide after the indexes are qualified. According to the method, high-purity hydrogen chloride and oxygen are used as reaction gases to react with metal molybdenum, and the two-stage purification process is performed after the reaction, so that the purity of the product is effectively improved, and the purity of the dichloromolybdenum dioxide prepared by the method can reach 99.99% or above.

To provide a metal acid compound dispersion with excellent water dispersibility, solubility, and storage stability, and a method for producing the same.SOLUTION: A metal acid compound dispersion contains at least two metals M selected from the group consisting of niobium, tantalum, molybdenum, tungsten, and titanium, the metal acid compound dispersion containing: at least one element X selected from the group consisting of alkali metal elements and / or alkaline earth metal elements; and a phosphorus compound and / or a chlorine compound. The particle diameter (D50) of the particles in the metal acid compound dispersion is at most 1000 nm as determined by the dynamic light scattering method.SELECTED DRAWING: None

The invention relates to a microcrystal / amorphous halide solid electrolyte which is doped and modified lithium zirconium halide, and the chemical formula of the microcrystal / amorphous halide solid electrolyte is Li < x > Zr < 1-y-z > Ta < y > M < 1z > X O < delta >, in the formula, M1 is any one of Nb, Hf, Mo and W, X is at least one of Cl, Br and I, 1.4 < = x < = 4, 0.3 < = y < = 0.7, 0.1 < = z < = 0.2, 4 < u < = 5, 0.7 < = delta < = 2. According to the invention, due to the synergistic effect of two high-valence positive ions and negative ion O < 2-> doping, lithium ions are easier to migrate in crystal lattices, the migration distance is reduced, and the original lithium zirconium-based halide with a trigonal structure is converted into an amorphous structure mixed with a small amount of microcrystals, so that the improvement of the ionic conductivity of the lithium zirconium-based halide is realized; the room-temperature ionic conductivity of the finally prepared microcrystal / amorphous halide solid electrolyte is 2.5 mS / cm or above.

The invention discloses a preparation method of an ultrathin two-dimensional nanosheet, the ultrathin two-dimensional nanosheet and application of the ultrathin two-dimensional nanosheet, and the preparation method comprises the following steps: (1) mixing a raw material containing a layered solid-phase material I with an intercalator, and carrying out intercalation reaction to obtain an intercalated layered solid-phase material II; and (2) mixing the intercalated layered solid-phase material II obtained in the step (1) with a solvent, and carrying out ultrasonic treatment to obtain the ultrathin two-dimensional nanosheet, the chemical formula of the layered solid-phase material I is MQ2. The material has potential application value in catalysis, energy storage and quantum devices.

The present invention provides a novel method for preparing molybdenum dioxide dichloride, belonging to the technical field of molybdenum dioxide dichloride. The method uses molybdenum trichloride, activated carbon, and chlorine as reaction raw materials. The molybdenum trichloride and activated carbon are mixed in a certain proportion, placed in a tubular reactor, heated to a certain temperature, and then an excess of dry chlorine is introduced to react to produce molybdenum dioxide dichloride gas. This gas is collected in a cooling chamber to obtain molybdenum dioxide dichloride solid. The crude product is then sublimated and purified to ultimately obtain a high-purity molybdenum dioxide dichloride product. This method has a high yield, improves raw material utilization and product yield, reduces production costs, and is conducive to industrial production.

The present application relates to the technical field of ammonium molybdate preparation, and specifically discloses a production process of ammonium molybdate. A production process of ammonium molybdate comprises the following preparation steps: (1) roasting and impregnating molybdenite to obtain a leachate; (2) mixing the leachate and a chelating purifier, filtering the mixture, and passing the filtrate through an ion exchange resin to obtain a sodium molybdate solution after elution; (3) crystallizing the sodium molybdate solution to obtain ammonium molybdate. The ammonium molybdate prepared by the present application has the advantages of low impurity content and high purity.

The invention discloses a molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material, a preparation method thereof and a lithium ion battery. The invention belongs to the field of lithium ion batteries, and discloses a molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material, which is characterized in that a high-nickel ternary positive electrode material is used as a matrix, Mo and Mg are co-doped in the matrix, and the surface of the matrix is coated with a Li2MoO4 coating layer. The invention also discloses a preparation method of the molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material and a lithium ion battery containing the material. According to the molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material disclosed by the invention, Mo / Mg double doping can enhance the interface stability and the internal crystal structure stability of the material at the same time, and the Li2MoO4 coating layer is beneficial to inhibition of side reaction with an electrolyte and reduction of electrochemical impedance, so that the electrochemical performance of the high-nickel ternary positive electrode material is comprehensively improved; molybdenum and magnesium co-doping and Li2MoO4 coating synergistically improve the electrochemical performance of the material.

The present invention belongs to the field of hydrometallurgy technology, and specifically relates to a method for recovering ammonia and nitrogen from ammonium molybdate mother liquor and removing other impurity ions. The method comprises: extracting the ammonium molybdate mother liquor and performing oil separation to produce an ammonia recovery stock solution; neutralizing and filtering the ammonia recovery stock solution to obtain a neutralized filtrate; deeply decalcifying the neutralized filtrate to obtain a decalcified filtrate; steam stripping the decalcified filtrate to recover ammonia; recovering ammonia from the non-condensable gas produced in the overhead condenser after steam stripping and the steam produced during the neutralization process; and heat exchanging the deeply impurity-removed purified liquid produced at the bottom of the steam stripping tower and the oil-separated ammonia recovery stock solution, cooling them, and then transferring them to the production system for reuse. The present invention can effectively recover ammonia and nitrogen resources from the ammonium molybdate mother liquor, deeply remove other impurity ions in the solution, eliminate the blockage effect of CaSO4 scale on pipelines and heat exchangers, improve the Mo leaching rate, and reduce the three-phase product yield and organic phase loss.

A stirring auxiliary device for ammonium molybdate crystallization, specifically relates to the technical field of stirring of ammonium molybdate crystallization, including a stirring tank, a sleeve concave plate and a reduction motor, wherein the sleeve concave plate is fixed on the outer wall of the stirring tank, and the reduction motor is fixed on the upper surface of the sleeve concave plate, wherein a synchronous protection mechanism is installed at the output end of the reduction motor. The synchronous protection mechanism and the protection storage mechanism of the present invention, the reduction motor drives the rotating frame to rotate clockwise, the two limit rings carry the linkage rod to move upward, the linkage rod drives the connecting block to move upward along the inner wall of the stirring slide, the sleeve strip approaches the center point of the stirring slide, and the two stirring blades enter the inside of the two protection baffles respectively and simultaneously, so that the amount of crystallization can be known in time to achieve speed reduction and storage of the two stirring blades, so as to avoid the two stirring blades from contacting a large amount of ammonium molybdate crystals at high speed, causing impact and crushing, and greatly improving the quality of ammonium molybdate crystallization.