793 results about "Vanadium atom" patented technology

The invention relates to the technical field of vanadium pentoxide preparation, and particularly discloses a preparation method of high-purity vanadium pentoxide, which comprises the following steps: S1, vanadium slag pretreatment: carrying out microwave activation on vanadium slag, and then carrying out ball milling and roasting to obtain clinker; the sulfuric acid-oxalic acid composite acid and the clinker are mixed and leached, the pH is adjusted after leaching is completed, and vanadium-containing leachate is obtained through filtering; s3, vanadium enrichment: heating the vanadium-containing leachate, adding a sodium carbonate solution while stirring, adjusting the pH value, preserving heat and curing, and then carrying out hot filtration to obtain vanadium-rich filter residues; s4, vanadium purification: mixing the vanadium-rich filter residues with a sodium hydroxide solution, stirring, introducing compressed air while stirring, and carrying out hot filtration after the reaction is finished, so as to obtain vanadium-rich filtrate; and S5, calcining: carrying out two-stage calcining on the ammonium metavanadate precursor to obtain high-purity V2O5. The preparation method is high in vanadium recovery rate, and the purity of the prepared V2O5 is 99% or above.

The invention discloses a bifunctional chiral metamaterial surface capable of switching polarization conversion and wave absorption, and belongs to the technical field of electromagnetic metamaterials. The method is used for solving the problem that most existing chiral super-structure surfaces cannot realize dynamic adjustability and quantitative controllability and cannot have dual functions of polarization conversion and wave absorption at the same time. The super-structure surface unit structure is composed of a graphene film layer, a gold-vanadium dioxide resonance layer, a silicon dielectric layer and a bottom-layer continuous gold film. Switching of two functions of polarization conversion and wave absorption is realized by changing the conductivity of vanadium dioxide; polarization conversion and dynamic regulation and control of the wave absorbing efficiency are realized by changing the Fermi level of the graphene; quantitative controllability of polarization conversion and a wave absorbing function is realized by controlling a function weighting function. Besides, the chiral super-structure surface also has the advantages of incident angle robustness, small thickness and small size, has double functions of broadband, and has potential application value in the fields of optical devices, communication equipment, biomedical sensors and the like.

The invention belongs to the technical field of vanadium enrichment mechanisms of phosphorus vanadium ores, and discloses a research method of a vanadium enrichment mechanism in a diagenetic stage of phosphorus vanadium ores, which comprises the following steps: S1, sample collection and treatment; s2, rock ore identification and mineral composition analysis; s3, analyzing the occurrence state and microcell morphology of vanadium; s4, performing geochemical analysis on the whole rock; s5, in-situ microcell geochemical analysis is carried out; s6, phosphorus nodule analysis; s7, comprehensive analysis and mineralization model establishment; according to the method, mineralogy, total rock geochemistry, micro-area surface scanning and other multi-scale and multi-means research methods are comprehensively utilized, and the vanadium occurrence state, the ore-forming fluid evolution and the phosphorus-vanadium coupling relation are finely described; in-situ microcell geochemical analysis is introduced into phosphorus nodule analysis, the internal structure, the growth sequence and element distribution of the phosphorus nodule are directly revealed, obvious frontier and systematicness are achieved, and reliable theoretical support is provided for accurate exploration of vanadium ore resources and green and efficient dressing and smelting process research and development.

The invention belongs to the field of functional nano materials, and relates to a method for large-scale preparation of monoclinic phase vanadium dioxide nano powder, a heat insulation film and application of the heat insulation film, and large-scale preparation of the monoclinic phase vanadium dioxide nano powder is successfully achieved by combining a coprecipitation method with low-temperature calcination. The obtained product has excellent size uniformity (the average particle size is 65 + / -10 nm) and an adjustable phase change characteristic (61-68 DEG C). The polymer-based composite film prepared based on the nano powder shows excellent optical performance, and the method has the advantages of mild reaction conditions (less than or equal to 600 DEG C), controllable product morphology and phase transition temperature and the like, and provides a reliable solution for industrial production of nano functional materials for intelligent windows.

The invention discloses a method for intensively leaching chromium from vanadium extraction waste slag, and belongs to the field of metallurgical chemical industry. According to the method, diboron trioxide serves as a catalyst, vanadium extraction waste slag, sodium carbonate and sodium hydroxide serve as raw materials, the raw materials and the catalyst are mixed according to a set proportion, and leaching is conducted after roasting is conducted in a microwave muffle furnace. According to the method provided by the invention, the reaction can be promoted to be efficiently carried out at medium and low temperatures, the extraction rate of chromium can reach 95% or above, and the synergistic effect of'low addition amount-high catalytic efficiency 'can be realized under the condition that a small amount of catalyst is added.

The invention discloses a method for separating vanadium and iron in a high-iron-vanadium electrolyte. The method comprises the steps of pH regulation and control, iron removal, vanadium extraction and vanadium reverse extraction. In the step of iron removal, an iron ion targeted complexing agent and a solid phase adsorbent are added into the high-iron vanadium electrolyte with the pH adjusted, reaction is conducted for 10-15 min under stirring, then direct filtering is conducted, and low-iron vanadium electrolyte and a solid phase are obtained; in the vanadium extraction step, vanadium in the low-iron vanadium electrolyte is extracted by adopting a mixed solvent of pretreated P204, TBP and sulfonated kerosene, and a vanadium-containing organic solution is obtained; and the vanadium reverse extraction comprises the step of carrying out reverse extraction on the vanadium-containing organic solution through a sulfuric acid solution with the concentration of 2.0-5.0 mol / L to obtain a vanadium electrolyte. The method can be used for treating iron ions in all valence states, particularly ferric ions which are easier to extract than vanadium ions, qualified vanadium electrolyte with the iron ion concentration meeting the industrial standard can be directly obtained after reverse extraction, and a complexing agent and an adsorbent can be recycled.

A process produces high-purity vanadium chemicals from vanadium raw materials having high molybdenum contents. Molybdenum is selectively precipitated via vanadium from alkaline vanadate solutions using the following process steps: providing a molybdenum-containing alkaline vanadate solution, adding calcium hydroxide as a precipitant in portions while keeping the pH constant between 6 and 7 using acid, mixing the solution, solid-liquid separation of the resulting suspension, and further processing the low-molybdenum alkaline vanadate solution to produce a high-purity vanadium chemical having a molybdenum content of at most 500 ppm.

The invention discloses a magnetic electronic device for generating track torque by using a metal vanadium or titanium track Hall effect and a manufacturing method thereof. The device comprises a substrate, a track Hall structure containing a vanadium or titanium layer, and a heavy metal layer and a ferromagnetic layer which are adjacent to the track Hall structure, when a charge current passes through the vanadium or titanium layer, a transverse track current is generated based on the track Hall effect, and the track current is injected into the ferromagnetic layer and then converted into an effective track torque for controlling the magnetization state of the ferromagnetic layer. Preferably, the ferromagnetic layer has a perpendicular magnetic anisotropy. According to the invention, the light transition metal vanadium or titanium is used as the track Hall material, the experiment proves that a huge track Hall angle greater than 0.45 can be obtained, and meanwhile, the resistivity of the material is lower, so that the shunting phenomenon can be reduced in an actual device, and the critical current density for realizing write-in flipping can be obviously reduced. The device is simple in structure and compatible with an existing semiconductor process, and a brand new material platform is provided for developing a low-power-consumption and high-density magnetic random access memory (MRAM).

The application provides a surface fluorine-modified bismuth vanadate photoelectrode and a preparation method and application thereof. Fluorine atoms are attached to the surface of the bismuth vanadate, and part of the fluorine atoms replace the two-coordinated oxygen atoms on the surface of the bismuth vanadate, namely the surface fluorine-modified bismuth vanadate photoelectrode. The surface fluorine-modified bismuth vanadate photoelectrode greatly improves the oxidation rate and molecular reaction efficiency of hydroxyl radicals generated by photoelectrolysis of water, effectively improves the glycerol oxidation efficiency, the selectivity of the product formic acid, and reduces the energy consumption of the reaction.

The invention discloses a vanadium iron-site doped iron phosphate material and a preparation method, and relates to the technical field of lithium ion battery positive electrode material preparation, pure water is used as a base solution, and a vanadium salt solution with the pH value of 2.0-3.0, a ferrite solution with the pH value of 1.0-2.5 and a phosphorus-oxygen mixed solution with the pH value of 5.0-7.0 are simultaneously added into a reaction kettle in a three-strand parallel flow mode for a co-precipitation reaction. By controlling the acid environment of a key solution system, reduction of metavanadate radicals or generation of ferric vanadate precipitates is effectively inhibited, and vanadium elements are successfully and uniformly doped to iron sites of iron phosphate crystal lattices; the mass ratio of iron to phosphorus in the obtained iron phosphate material is stabilized at 95-98%, the doping amount of vanadium is 100-10000 ppm, and the vanadium is uniformly distributed. Lithium iron phosphate prepared by taking the material as a precursor has higher discharge capacity and compaction density, and the electrochemical performance of a lithium ion battery is remarkably improved.

The invention discloses a method for preparing a vanadium electrolyte by extracting a sodium salt roasting vanadium extraction leaching solution, and belongs to the technical field of vanadium electrolytes. In order to improve the impurity separation depth and the product purity of the vanadium electrolyte, the invention provides a method for preparing the vanadium electrolyte by extracting a sodium salt roasting vanadium extraction leaching solution, which comprises the following steps: removing silicon from the leaching solution, selectively reducing and acidifying, extracting anions, washing, reducing and reversely extracting, degassing and deoiling, and electrolyzing to obtain the 3.5-valent vanadium electrolyte. According to the method, the sodium-modified vanadium-containing leaching solution is used as a raw material, anions in the solution are completely converted into cations in a mode of combining pretreatment deep silicon removal with selective reduction acidification, vanadium is in an anion form, all impurity ions in the solution are efficiently separated through anion extraction-reduction reverse extraction, and the purity of the vanadium-containing leaching solution is improved. The prepared vanadium electrolyte product is extremely low in impurity ion content, the vanadium yield is remarkably improved, and the preparation cost of the high-purity vanadium electrolyte is greatly reduced.

This invention belongs to the field of vanadium redox flow batteries, specifically relating to a vanadium redox flow battery precursor, a vanadium redox flow battery, and a method for preparing the same. The vanadium redox flow battery precursor of this invention includes a positive electrode electrolyte precursor and a negative electrode electrolyte precursor; the positive electrode electrolyte precursor includes vanadium ions, an inorganic acid, a positive electrode side reaction inhibitor precursor, and a solvent; wherein the positive electrode side reaction inhibitor precursor is aniline; the inorganic acid includes hydrochloric acid; the negative electrode electrolyte precursor includes vanadium ions, an inorganic acid, a negative electrode side reaction inhibitor precursor, and a solvent; wherein the negative electrode side reaction inhibitor precursor is a metal compound; the metal compound is selected from one or more of tin compounds, bismuth compounds, and antimony compounds; the inorganic acid includes hydrochloric acid.

The invention discloses a flow battery external characteristic prediction method and equipment. The method comprises the following steps: constructing an equivalent circuit model and a thermal model of an all-vanadium flow battery; calculating equivalent circuit parameters of the equivalent circuit model according to the initial electrolyte temperature and the initial vanadium ion concentration of each valence state; calculating battery output voltage and electric power at the current moment according to the equivalent circuit parameters and the charging and discharging current; inputting the environment temperature and the electric power at the current moment and the pump power of the circulating pump into a thermal model, and solving the temperature of the galvanic pile electrolyte at the next moment; inputting the stack electrolyte temperature at the next moment into the dynamic differential equation of the vanadium ion concentration to obtain the vanadium ion concentration at the next moment; the electrolyte temperature and the vanadium ion concentration at the next moment are fed back to the equivalent circuit model, loop iteration is conducted till the battery charging and discharging process reaches a steady state, and the output voltage and the stack electrolyte temperature of the flow battery at each moment in the charging and discharging process are obtained. The computing resources are reduced, and the prediction accuracy is improved.

The invention discloses an aqueous zinc-vanadium battery electrolyte preparation method and a battery, and belongs to the technical field of aqueous zinc ion batteries. The preparation method comprises the following steps: preparing a polyquaternium aqueous solution; and adding soluble zinc salt into the polyquaternium aqueous solution, stirring and dissolving to obtain the composite electrolyte. According to the electrolyte, through the synergistic effect of the polyquaternary ammonium salt and the zinc salt, the acidity and water activity of a system are effectively reduced, dendritic crystal growth and hydrogen evolution reaction of a zinc negative electrode are inhibited, meanwhile, a nitrogen-containing protective layer is formed on the surface of a vanadium positive electrode, and vanadium dissolution is reduced. The battery containing the electrolyte shows excellent cycle stability in a wide temperature range of-20 to 80 DEG C, the cycle life of the zinc symmetric battery exceeds 3000 hours, the capacity retention rate of the whole battery after 4000 cycles reaches 87.6%, and the technical problems of aggravation of interface side reaction and fast degradation of battery performance under high-temperature and high-acidity conditions are solved.

The invention provides a vanadium-based metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of metal organic framework materials. The vanadium-based metal organic framework material is of a three-dimensional framework structure formed by connecting a one-dimensional vanadium oxygen chain and a squaric acid ligand through coordinate bonds. The preparation method of the vanadium-based metal organic framework material comprises the following steps: adding a vanadium source and an organic ligand into an acidic aqueous solution for solvothermal reaction to obtain the vanadium-based metal organic framework material, and the organic ligand is squaric acid. The vanadium-based metal organic framework material provided by the invention can be used for separating straight-chain alkane and isomers thereof.

The application relates to a ferroelectric monolayer vanadium trichloride film and a preparation method thereof. The method comprises the following steps: evaporating and depositing VCl3 powder on the surface of a NbSe2 substrate under an ultrahigh vacuum atmosphere, and performing annealing treatment, so that the ferroelectric monolayer vanadium trichloride film is obtained. The sample preparation strategy of molecular beam epitaxy under an ultrahigh vacuum environment is used, high-purity VCl3 powder is evaporated and deposited on a NbSe2 substrate, an atomically flat monolayer VCl3 sample is obtained through annealing treatment, in-situ scanning tunneling microscope technology and scanning tunneling spectrum technology are combined, and it is determined that the monolayer VCl3 is a semiconductor material with ferroelectricity. The method provides a new method and idea for introducing ferroelectricity in the family of transition metal trichlorides, has high application potential and scientific research value, meanwhile, the successful introduction of ferroelectricity in the system also provides a new platform for carrying out multi-state regulation and research.

The present disclosure provides a vanadium electrolyte, a preparation method and use thereof. The method includes: adding sulfuric acid into vanadium-containing ore, and stirring to obtain a mixture; curing the mixture to obtain a clinker; leaching the clinker with water to obtain a vanadium-containing leaching solution; adding a first impurity-removing agent into the vanadium-containing leaching solution to obtain a first purified solution; adding an oxidizing agent, a ferric phosphate dihydrate seed crystal and a second impurity-removing agent into the first purified solution to obtain a second purified solution; adding a reducing agent and a flocculating agent into the second purified solution, and filtering a resultant solution to obtain a filtered solution; mixing the filtered solution with an extraction liquid to obtain a vanadium-supported organic phase; stripping the vanadium-supported organic phase to obtain a stripping liquid; and removing an organic phase from the stripping liquid to obtain the vanadium electrolyte.

This application provides a KVOH nanomaterial, its preparation method, and an aqueous zinc-ion battery to address the technical problem of low performance of vanadium pentoxide cathode materials in the prior art. The KVOH nanomaterial provided in this application is obtained by a solvothermal reaction in an aqueous ethylene glycol solution. The introduction of potassium ions in the reaction expands the ion transport channels between the electrode material layers, improving the cycle performance of the battery. At the same time, the introduction of tetravalent vanadium also increases the specific capacity of the battery, thereby solving the technical problem of low performance of vanadium pentoxide cathode materials in the prior art.

This disclosure concerns a method of extracting vanadium, comprising mixing carbon soot ash with a leaching agent and an oxidising agent in a polar solvent in order to form a mixture and reacting the mixture in order to form vanadium 5 (V) ions; filtrating the mixture in order to separate a vanadium leachate from a leached ash; and purifying the vanadium leachate in order to obtain a vanadium filtrate. A weight ratio of carbon soot ash to polar solvent is about 1:2 to about 1:10. A mole ratio of leaching agent to oxidising agent is about 2:0.3 to about 2:2. This disclosure concerns a method of producing vanadium pentoxide.

The application discloses a heat exchange tube for a vanadium liquid flow battery and a preparation method and application thereof, and belongs to the technical field of liquid flow battery heat exchange. The base material of the heat exchange tube for the vanadium liquid flow battery is any one of an industrial pure titanium tube, a titanium alloy tube or a nickel-based alloy tube; the outer surface of the heat exchange tube is covered with a protective layer, and the protective layer is a polymer coating or a metal coating; wherein the outer surface of the polymer coating has a micro-crease structure. The heat exchange tube for the vanadium liquid flow battery has excellent corrosion resistance and thermal cycle stability, avoids the problem that metal ions in the base material are easily dissolved out, leading to ion pollution of an electrolyte, and thus the safety and stability of the vanadium liquid flow battery are effectively improved.

The invention discloses a stealth coating material for aviation aircrafts. According to the invention, a three-layer composite structure design is adopted; the intelligent sensing layer is composed of graphene quantum dots and a piezoelectric nanofiber composite network, so that real-time sensing of electromagnetic wave signals is realized; the tunable metamaterial layer comprises a liquid crystal elastomer matrix and nickel-titanium alloy nanowires dispersed in the liquid crystal elastomer matrix, and electromagnetic parameters of the material are dynamically adjusted by applying an electric field or a temperature field; vanadium dioxide nanoparticles, a photonic crystal structure and carbon nanotube aerogel are integrated in the multispectral stealth layer, and radar, infrared and visible light multispectral synergistic stealth is achieved. The coating is further integrated with a microencapsulation repairing agent and an intelligent control system, and has the self-repairing and self-adaptive adjusting functions. Compared with the prior art, 0.1-40 GHz ultra-wide frequency band radar wave absorption is achieved, the radar cross section is reduced by 25-30 dB, the infrared radiation characteristic is reduced by 80% or above, the surface density is only 1.2-1.5 kg / m, the weight is reduced by 65% compared with a traditional coating, and a key material technical support is provided for a new generation of stealth aircrafts.

The invention provides a bidentate imine vanadium metal complex as well as a preparation method, a catalyst composition and application thereof, and the bidentate imine vanadium metal complex has the following structural formula: the bidentate imine vanadium metal complex disclosed by the invention has higher catalytic activity on copolymerization reaction of ethylene and cycloolefin as a catalyst; the insertion rate of the comonomer in the polymer is high; the bidentate imine vanadium metal complex disclosed by the invention, as a catalyst, also has relatively high catalytic activity on a copolymerization reaction of ethylene and a hydroxyl-containing polar monomer, and a functionalized polyolefin product can be obtained.

The invention discloses a zinc ion battery and a preparation method thereof, the zinc ion battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, and the zinc ion battery is characterized in that the positive electrode comprises a vanadium-based material, and the vanadium-based material comprises vanadium pentoxide intercalated by water molecules and metal ions and an MXene coating layer; the electrolyte comprises zinc salt, water and an additive, the additive comprises positive ions and negative ions, and the negative ions have the structure shown in the formula I. According to the zinc ion battery, water molecules and metal ions are used for intercalating vanadium pentoxide and coating MXene, and the water molecules and the metal ions are cooperatively used with the electrolyte with specific composition, so that ions can be quickly intercalated / deintercalated, the intrinsic conductivity of the material is enhanced, the structure of the material is stabilized, vanadium dissolution / metal ion dissolution at the positive electrode side can be prevented, and the service life of the zinc ion battery is prolonged. And the side reactions of interface hydrogen evolution and corrosion caused by decomposition of active water molecules on the zinc negative electrode side are synergistically inhibited. Through the comprehensive action of the factors, the zinc ion battery has excellent electrochemical performance.

The application discloses a method for preparing vanadium electrolyte from vanadium-containing shale through a short process, and comprises the following steps: crushing, grinding and slurry preparation of vanadium-containing shale to obtain ore slurry; flotation of the ore slurry to obtain flotation concentrate; concentration of the flotation concentrate, sulfuric acid aging and water leaching to obtain vanadium-containing leaching solution; removal of aluminum from the vanadium-containing leaching solution to obtain post-aluminum-removal solution; neutralization and reduction pretreatment of the post-aluminum-removal solution to obtain post-pretreatment solution; one-stage extraction of the post-pretreatment solution to obtain vanadium-rich solution I; two-stage extraction of the vanadium-rich solution I to obtain vanadium-rich solution II; and oil removal treatment of the vanadium-rich solution II to obtain vanadium electrolyte. The method realizes efficient extraction of vanadium from multi-metal vanadium-containing shale through flotation and sulfuric acid aging and water leaching, directly uses the vanadium-containing leaching solution as raw material, and prepares vanadium electrolyte through neutralization and reduction pretreatment, one-stage extraction, two-stage extraction and oil removal process. The method has the characteristics of short process, low cost, environmental friendliness, strong adaptability of raw materials, less reagents and energy consumption, etc.

The application discloses a vanadium-based nano drug capable of reversing cisplatin drug resistance through multiple targets and a preparation method thereof.The preparation method of the drug comprises the following steps: (1) preparation of mesoporous silica; (2) vanadium ion doping; (3) surface amino modification; (4) loading of a Pt(IV) prodrug; and (5) PDGF modification on the surface of the drug-loaded nanoparticles, thereby obtaining the vanadium-based nano drug.The vanadium-based nano drug prepared by the method has excellent performance, can reverse cisplatin drug resistance through multiple targets, and provides a new idea for constructing a lung cancer precision treatment scheme for reversing cisplatin drug resistance through multiple targets.

The invention discloses a flocculent vanadium-doped MoN / CNT composite material and a preparation method and application thereof.The method comprises the steps that 1, ammonium molybdate is added into absolute ethyl alcohol to be dissolved, and a solution A is obtained; 2, adding 2-methylimidazole into deionized water, and dissolving to obtain a solution B; 3, adding the solution A into the solution B, stirring, carrying out suction filtration, separating out a precipitate, and drying to obtain a precursor I; 4, adding the precursor I into deionized water, and stirring to obtain a turbid solution; 5, ammonium metavanadate and polyvinylpyrrolidone are added into absolute ethyl alcohol, and a solution C is obtained; 6, adding the solution C into the turbid solution, stirring, carrying out suction filtration, separating out a precipitate, and drying to obtain a precursor II; 7, performing low-temperature sintering on the precursor II in an argon atmosphere to obtain a precursor III; and 8, mixing the precursor III with urea, and performing high-temperature sintering in an argon atmosphere to obtain the vanadium-doped MoN / CNT composite material which has high energy density and high conductivity and can endow an energy storage device with high rate capability and long cycle life.

The application relates to a preparation method of a diffused island-shaped vanadium dioxide thermochromic film. The preparation method comprises the following steps: a precursor forming step: forming a vanadium oxide film with a thickness of 20-100 nm as a precursor on the surface of a substrate by a magnetron sputtering method, a thermal deposition method or a laser-induced vapor deposition method; a pretreatment step: heating the film to 600-950 DEG C at a temperature increasing rate of more than 80 DEG C / min in an annealing furnace with a pressure of 50 mTorr or less, then keeping the temperature for 5-30 min, and then cooling the film to 300-450 DEG C in the furnace to form the film into a diffused island shape; and an oxidation step: introducing oxygen into the annealing furnace to oxidize the film to obtain a vanadium dioxide film. The film prepared by the preparation method of the vanadium dioxide thermochromic film has good sunlight modulation efficiency and good light transmittance.

Methods and systems for depositing vanadium and / or indium layers onto a surface of a substrate and structures and devices formed using the methods are disclosed. An exemplary method includes using a cyclical deposition process, depositing a vanadium and / or indium layer onto the surface of the substrate. The cyclical deposition process can include providing a vanadium and / or indium precursor to the reaction chamber and separately providing a reactant to the reaction chamber. The cyclical deposition process may desirably be a thermal cyclical deposition process. Exemplary structures can include field effect transistor structures, such as gate all around structures. The vanadium and / or indium layers can be used, for example, as barrier layers or liners, as work function layers, as dipole shifter layers, or the like.

The invention relates to the technical field of hydrometallurgy, and provides a method for cleanly extracting vanadium from vanadium slag based on dolomite. According to the method, dolomite is adopted to replace a traditional calcification or sodium salt roasting auxiliary agent to co-roast the vanadium slag, and vanadium in the vanadium slag is roasted through two-step temperature control to be converted into acid-soluble calcium magnesium vanadate roasting clinker. The roasting clinker is subjected to acid leaching to obtain vanadium liquid, the vanadium liquid is subjected to deep impurity removal through a magnesium ammonium phosphate precipitation method, ammonium sulfate is added into the vanadium liquid, the pH value is adjusted, acid ammonium salt vanadium precipitation is conducted, and ammonium polyvanadate is obtained. And washing, filtering, drying and calcining the ammonium polyvanadate to obtain high-purity powder vanadium pentoxide or melting and casting to obtain high-purity tablet vanadium pentoxide. Vanadium precipitation wastewater is subjected to reduction treatment, lime neutralization and solid-liquid separation and then is reused in a leaching system, and cyclic utilization of ammonium salt and water resources is achieved. By means of the technical scheme, the problem that in the related technology, the vanadium leaching rate is low is solved.

The invention belongs to the technical field of infrared focal plane sensor manufacturing, and particularly relates to a vanadium oxide etching post-processing method based on VHF wetting driving. Comprising the following steps: performing graded vacuumizing and temperature programming pretreatment on a wafer subjected to vanadium oxide etching, and continuously introducing VHF moistening mixed gas consisting of anhydrous hydrogen fluoride, ethanol steam and inert carrier gas into a treatment cavity; by accurately regulating and controlling the temperature and pressure of the cavity, anhydrous hydrogen fluoride is promoted to be subjected to a selective fluorination reaction with photoresist decomposition products and metal impurities left after etching to generate gaseous products, and ethanol steam synchronously exerts the dual effects of moistening, corrosion prevention and water molecule desorption promotion. According to the method, a gas phase processing mode is adopted in the whole process, liquid intervention is avoided, the problems of vanadium oxide pixel adhesion and film corrosion can be effectively solved, meanwhile, residual impurities are thoroughly removed, the electrical property stability of the vanadium oxide film is guaranteed, the yield and detection precision of the infrared focal plane sensor are remarkably improved, and the method has good industrial application prospects.