418 results about "Pentoxide" 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 relates to the technical field of electronic devices, in particular to a synaptic memristive device with a vertical structure and a preparation method and application of the synaptic memristive device. The invention provides a synaptic memristor with a vertical structure. The synaptic memristor structurally comprises a substrate, a bottom electrode, an active layer, an electrolyte layer and a top electrode which are stacked in sequence. Wherein the active layer is a vanadium pentoxide film which is excellent in electrical property and optical response, and the sensitivity and plasticity of the device can be improved; the electrolyte layer adopts polyethylene oxide ionic glue, so that the resistance change characteristic of the active layer can be adjusted, the reaction between the active layer and the top electrode can be prevented, and the service life of the device is prolonged; the bottom electrode is an indium tin oxide thin film, has good compatibility with an active layer interface, can promote oxygen vacancy migration, and optimizes the resistance switching performance. Through mutual coordination of the materials, the device can generate microampere-level current under millivolt-level stimulation, shows high-sensitivity synaptic plasticity, and is suitable for a high-performance neuromorphic computing system.

The invention belongs to the field of hydrometallurgy, and particularly discloses a high-purity vanadium oxide electrode and a preparation method thereof. The method comprises the following steps: pre-treating the alkaline vanadium leaching solution by using an activated aluminum oxide adsorption column to obtain a pre-treated solution; adding a composite impurity removal agent taking modified lignosulfonate as a main agent into the pretreatment liquid for primary impurity removal to obtain primary impurity-removed filtrate; adding a calcium hydroxide suspension and a flocculating agent into the primary impurity-removed filtrate for secondary impurity removal to obtain secondary impurity-removed filtrate; purifying the secondary impurity-removed filtrate by using an ion exchange column to obtain a purified solution; ammonium salt is added into the purified liquid for vanadium precipitation, and ammonium metavanadate crystals are obtained; calcining the ammonium metavanadate crystal to obtain high-purity vanadium pentoxide; and preparing the high-purity vanadium oxide electrode by using the high-purity vanadium pentoxide. According to the scheme, the high-purity vanadium pentoxide is prepared by taking the alkaline vanadium leaching solution as a raw material through a multi-stage deep impurity removal process, and the high-purity vanadium oxide electrode is prepared by taking the alkaline vanadium leaching solution as the raw material.

The invention provides a vanadium aluminum phosphate electrode material and a preparation method thereof. In target product components, an aluminum source, a vanadium source and a phosphorus source are respectively aluminum nitrate or other aluminum sources, vanadium pentoxide or ammonium vanadate, ammonium dihydrogen phosphate, phosphoric acid or other phosphorus sources, and a nitrogen source of nitrogen-doped carbon is from polyvinylpyrrolidone or other nitrogen sources of a gel component; the carbon source is selected from polyvinyl alcohol and glycerol. By adopting an exogenous plasticizing physical crosslinking sol-gel method, in the whole reaction system, uniform distribution of reaction ions and intermediates is maintained, and finally, gel is networked, so that the problem of capacity fading caused by an unstable structure of an existing aluminum ion battery positive electrode material in a circulating process is solved, and the service life of the aluminum ion battery positive electrode material is prolonged. And the problems of high reaction system selection requirement, long preparation period and complex process of the existing endogenous covalent polycondensation sol-gel method for preparing the electrode material are solved.

The invention discloses a preparation method of 5N specified-grade high-purity vanadium pentoxide, which comprises the following steps: step S1, taking high-purity ammonium metavanadate as a raw material, mixing the raw material with pure water in proportion, heating for dissolving, and cooling to obtain an ammonium metavanadate solution; s2, enabling the ammonium metavanadate solution to pass through a resin column for adsorption, and collecting column passing liquid; s3, carrying out vacuum concentration on the column passing liquid, cooling and crystallizing the obtained concentrated liquid, and carrying out suction filtration to obtain primary crystals; s4, mixing the primary crystal with pure water in proportion, heating, filtering, cooling filtrate, crystallizing, filtering and washing with water to obtain a secondary crystal; step S5, repeating crystallization operation for 1-3 times to obtain recrystallized ammonium metavanadate; and step S6, putting ammonium metavanadate into a porcelain baking tray, putting the porcelain baking tray into a calcining furnace, vacuumizing, calcining and cooling to obtain a 5N specified-grade high-purity vanadium pentoxide product. The method has the characteristics of simple principle, convenience in operation, high reliability and the like, and the purity of vanadium pentoxide is remarkably improved.

The invention relates to a preparation method of high-purity vanadium pentoxide, in particular to the field of high-purity vanadium pentoxide, which comprises the following steps: adding an impurity removal agent into a phosphorus-containing vanadium solution to remove impurities, and then carrying out solid-liquid separation to obtain filtrate; the obtained filtrate is sequentially subjected to first pH value adjustment, second pH value adjustment, ammonium salt vanadium precipitation, dehydration, calcination deamination and melting, and high-purity vanadium pentoxide is obtained; wherein the impurity removing agent is prepared from calcium salt and a flocculating agent; the final pH value of the first pH value adjustment is 4.5-5.5; the final pH value of the second pH value adjustment is 1.8-2.2. According to the preparation method provided by the invention, the vanadium in the vanadium liquid is efficiently recovered by matching the metallographic phase specific impurity removal process of the vanadium liquid with pH value adjustment, the purity of the obtained vanadium product is greater than or equal to 99.9%, and the recovery rate of the vanadium is greater than or equal to 98%.

This invention relates to a biomass-based gel electrolyte membrane, its preparation method, and its application. The method includes preparing regenerated cellulose using a sol-gel method, adding sodium alginate and zinc chloride solution, and rapidly constructing a biomass-based composite gel electrolyte with a dual-network structure through metal ion coordination crosslinking. The biomass-based gel electrolyte membrane is obtained by adsorbing an aqueous electrolyte onto a gel membrane with a dual-network structure. This gel electrolyte membrane is then assembled with a zinc anode and a vanadium pentoxide cathode to obtain a zinc-ion battery. This invention features a simple method, readily available and inexpensive raw materials, easy product molding, convenient operation and control, and is conducive to industrial production. The prepared composite gel electrolyte membrane has a dual-network structure, exhibiting good stability, liquid retention capacity, and ionic conductivity, and demonstrates excellent cycle capacity and lifespan when applied to aqueous zinc-ion batteries.

The invention discloses a chloride ion battery for realizing bromine / chlorine synergistic chemistry and a preparation method thereof, and belongs to the technical field of redox batteries. The chloride ion battery takes graphite paper coated with vanadium pentoxide and graphite as a positive electrode, wherein the mass ratio of the vanadium pentoxide to the graphite is (0.5: 1)-(2: 1); zinc foil is used as a negative electrode, and an electrolyte is a mixed aqueous solution of tetramethylammonium chloride and lithium bromide. A double-halogen system of a V2O5-graphite composite positive electrode is adopted, chlorine species are chemically stabilized through the action of bromine, BrCl is generated in the charging process to inhibit Cl2 formation, and meanwhile, the intercalation energy barrier of chlorine is reduced; according to the salt-in-water electrolyte based on tetramethylammonium chloride, an electrochemical window is expanded to 3.0 V, and BrCl hydrolysis is effectively inhibited. The high-voltage halogen ion battery prepared by the method can realize a 2.3 V discharge platform, provides a specific capacity of 600mAh g <-1 >, has a capacity retention rate of 90% after 200 cycles, and opens up a safe development path for the high-voltage halogen ion battery without toxic gas emission. In addition, the battery system is simple in structure and has remarkable cost benefits.

The invention discloses a process for extracting high-purity vanadium pentoxide from ammonium polyvanadate, and belongs to the technical field of nonferrous metallurgy. According to the process, efficient purification of vanadium pentoxide is achieved through the steps of sodium hydroxide dissolution, pH adjustment, gradient impurity removal, precise filtration, freezing-unfreezing circulation, high-purity water washing, centrifugal dewatering, two-stage firing and the like. In the process, the gradient impurity removal technology effectively reduces the content of impurities such as iron, sodium and the like, the precision filtration system ensures low residue of the impurities, the freezing-unfreezing circulation step further improves the crystal purity, and the two-stage firing process realizes directional conversion of the alpha-V2O5 crystal form. The purity of the obtained vanadium pentoxide product reaches up to 99.99% or above, the Na < + > content is smaller than or equal to 2 ppm, the Fe residue is smaller than or equal to 5 ppm, the alpha-V2O5 crystal form proportion is larger than or equal to 98%, the problems that in a traditional process, deep impurity removal is difficult, the product purity is insufficient, and crystal form conversion is incomplete are remarkably solved, and an effective technical approach is provided for preparing high-purity vanadium pentoxide.

The invention relates to a multi-element synergistic doped ATO target material and a preparation method thereof. Comprising the following steps: 1) uniformly mixing water and a powder dispersant, then adding an oxide 1 (at least one of tantalum pentoxide, niobium pentoxide, vanadium pentoxide, gallium oxide and tungsten trioxide), an oxide 2 (at least one of zinc oxide, copper oxide, cobalt oxide, manganese oxide and cerium oxide) and ATO raw material powder, and mixing and homogenizing to prepare slurry; 2) grinding the slurry and adding a powder forming adhesive; 3) carrying out spray drying granulation on the ground slurry; according to the preparation method, the ATO target material with high compactness (relative density gt, 98.5%) and low resistance (resistivity lt, 5 * 10 <-3 > omega.cm) is prepared through multi-element synergistic doping of the oxide, and the problem that compactness and conductivity of the ATO target material are difficult to consider at the same time in the prior art is solved.

The invention relates to the technical field of preparation of intermediate alloys for aerospace-grade titanium alloys, and discloses a vanadium-aluminum intermediate alloy for an aerospace-grade titanium alloy and a preparation method of the vanadium-aluminum intermediate alloy. According to preparation of the alloy, high-purity aluminum particles, vanadium pentoxide, calcium oxide, cryolite and aluminum foil serve as raw materials, a primary alloy is prepared through a vacuum aluminothermy method based on an aluminum foil bag-shaped powder bag type material, then the primary alloy is subjected to finishing treatment to obtain alloy particles, then the alloy particles are sequentially subjected to alkali washing, filtering, vacuum heat treatment and other links, and the aluminum foil bag type aluminum alloy is obtained. And finally, the AlV65 alloy which is higher in purity, better in component uniformity and purer in microstructure is prepared. The method can emphatically solve the problems that the existing vanadium-aluminum alloy is high in gas phase impurity content, heavy in component segregation and more in microscopic inclusion, and is of great significance to construction of a more tough aerospace industry chain and promotion of high-quality development of the industry.

The invention relates to a method for efficiently and selectively extracting vanadium from vanadium shale. According to the technical scheme, the method comprises the steps that vanadium shale is crushed and ground, vanadium shale mineral powder is obtained, a sulfuric acid solution I and the vanadium shale mineral powder are mixed, mixed ore pulp is obtained, a leaching aid is added for pulp mixing, stirring and solid-liquid separation are conducted, and vanadium-containing leaching liquid and leaching residues are obtained; adding sodium sulfite into the vanadium-containing leaching solution, heating and stirring to obtain a reduced solution; adjusting the pH value of the reduced solution, and carrying out solid-liquid separation to obtain an extraction stock solution and neutralization slag; mixing the extraction organic phase and the extraction stock solution, performing countercurrent positive extraction, mixing the obtained loaded organic phase and a stripping agent, and performing countercurrent reverse extraction to obtain a vanadium-rich solution; adding sodium chlorate into the vanadium-rich solution, heating and stirring to obtain an oxidized solution, adjusting the pH value of the oxidized solution, and carrying out hydrothermal reaction and solid-liquid separation to obtain a vanadium precipitation mother solution and a vanadium precipitation intermediate product; and roasting the vanadium precipitation intermediate product to obtain vanadium pentoxide. The method is high in vanadium leaching rate, low in concentration of impurity iron in the extraction solution, short in extraction stage and high in product purity.

The invention provides a method for preparing high-purity vanadium pentoxide from carbonation leachate. The method comprises the following steps: S1, adding aluminum salt into the carbonation leachate to remove silicon, and carrying out solid-liquid separation to obtain silicon-removed liquid; s2, mixing the silicon-removed liquid with ammonium salt, and performing solid-liquid separation after vanadium precipitation to obtain crude ammonium metavanadate; s3, re-dissolving the coarse ammonium metavanadate, carrying out stirring reaction on the obtained coarse ammonium metavanadate re-dissolved slurry, and carrying out solid-liquid separation to obtain an ammonium metavanadate solution; s4, a complexing agent and ammonium salt are added into the ammonium metavanadate solution for vanadium precipitation, and high-purity ammonium metavanadate is obtained after solid-liquid separation; and S5, carrying out high-temperature calcination on the high-purity ammonium metavanadate to obtain the high-purity vanadium pentoxide. According to the method provided by the invention, the high-purity vanadium pentoxide with low impurity content is obtained by adopting the technological means of deeply removing silicon, re-dissolving to remove iron and separating cations such as calcium, potassium, sodium and the like into the vanadium product through complexing crystallization, and the method is simple in technological process, low in auxiliary material consumption and relatively low in cost.

The invention provides a production method of a vanadium-aluminum alloy. The production method comprises the following steps: treating raw materials; the high-purity calcium fluoride is dried; lime and water are mixed according to the proportion of 1: 1, and the mixture is put into a drying box to be dried; the preparation method comprises the following steps: proportioning the following raw materials: vanadium pentoxide, aluminum powder and calcium fluoride according to the ratio of 1: (0.58-0.68): (0.02-0.13), proportioning the calcium fluoride according to the unit reaction heat of 3100-3150 KJ / kg, and uniformly mixing; filling the mixture into a reaction furnace body, compacting, and spreading an ignition agent on the material; ignition reaction; after the reaction is finished, standing the furnace body for 24 hours, moving out the furnace body, naturally cooling for 48 hours, and discharging from the furnace; the method mainly solves the problems of high alloy carbon content caused by graphite falling of the alloy graphite crucible and oxidation film and nitride film phenomena caused by metal solidification cracks.

The invention provides a method for preparing high-purity vanadium pentoxide from a sodium vanadium solution. The method comprises the following steps: firstly, through chromium removal, calcium removal and silicon removal treatment, reducing the contents of chromium, calcium and silicon in the sodium vanadium solution to a target requirement, namely Crlt; the concentration is 0.005 g / L, and the concentration is Cat; 0.01 g / L, Silt; 0.01 g / L; then, aluminum is removed through a two-step method, the pH of the system can be accurately controlled, and the aluminum content in the solution is reduced to be smaller than 0.001 g / L; finally, ammonium salt is added to obtain AMV sediment, after the potassium content in the AMV sediment is preferably controlled to be reduced to 0.001 wt%, calcination is conducted, a vanadium pentoxide product can be obtained, and the sulfur content can be lower than 0.001 wt%.

The invention discloses a high-temperature denitration catalyst used based on a garbage incinerator and a preparation process thereof, and relates to the technical field of catalysts, the high-temperature denitration catalyst comprises a catalyst, the catalyst takes anatase type titanium dioxide as a carrier and vanadium pentoxide and tungsten oxide as active components, nickel powder is added to prepare a mixed solution, and the mixed solution is used for dipping, calcining and forming the carrier. A large amount of nickel powder is added into an original catalyst for mixing, so that when the catalyst is in a garbage incinerator, the provided high-temperature condition drives nickel and oxides to react with water vapor, the existence of water in a catalyst environment is reduced, the reaction of SO2 and NH3 is improved, the conversion rate of NO is increased, and the conversion performance of the catalyst is improved.

The invention relates to the technical field of intermediate alloy metal materials, and provides a low-nitrogen vanadium-aluminum intermediate alloy and a preparation method thereof, and the low-nitrogen vanadium-aluminum intermediate alloy comprises the following components: 40-68 wt% of V, 0.001-0.003 wt% of N, and the balance of Al and inevitable impurities. The preparation method comprises the following steps: uniformly mixing raw materials of vanadium pentoxide powder and aluminum shots, charging the mixture into a furnace, carrying out exothermic smelting outside the furnace to obtain a vanadium-aluminum intermediate alloy semi-finished product, uniformly mixing potassium fluotitanate and nano carbon powder, putting the mixture as a grate-layer material at the bottom of a corundum crucible, charging the vanadium-aluminum intermediate alloy semi-finished product and the aluminum shots, and carrying out vacuum induction smelting, and the low-nitrogen vanadium-aluminum intermediate alloy is obtained. According to the preparation method provided by the invention, not only is the content of impurity nitrogen in the produced vanadium-aluminum intermediate alloy low, but also the production cost required by nitrogen removal is low.

The invention relates to the technical field of all-vanadium redox flow batteries, and particularly discloses a composition for promoting continuous production of a vanadium electrolyte and application of the composition. The invention discloses a composition for promoting continuous production of a vanadium electrolyte, which is characterized by specifically comprising the following components in parts by weight: 32-42 parts of concentrated sulfuric acid, 0.8-1.2 parts of a sulfonic acid compound, 0.05-0.15 part of sodium sulfate and 60-66 parts of water, the sulfonic acid compound is selected from any one or more of methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, sulfamic acid and p-toluenesulfonic acid. When the composition provided by the invention is used in continuous production of the vanadium electrolyte, the use amount of concentrated sulfuric acid is reduced, vanadium pentoxide can be effectively activated, and the reaction rate is increased; and the produced vanadium electrolyte has excellent electrochemical performance.

The invention relates to a method for preparing vanadium, chromium, aluminum and silicon products through gradient separation of vanadium shale. According to the technical scheme, silicon in the vanadium shale alkaline leaching solution is removed through a sulfuric acid precipitation method, and a desilicication solution and a siliceous precursor I are obtained; washing the siliceous precursor I with sulfuric acid, washing with water and calcining to obtain white carbon black; carrying out vanadium-chromium co-extraction on the desilicication liquid by adopting an amine extraction agent to obtain a vanadium-chromium organic phase; carrying out vanadium-aluminum extraction separation on the washing liquid by adopting an amine extraction agent to obtain a vanadium-rich organic phase and an aluminum-containing raffinate; the vanadium-rich organic phase and the vanadium-chromium organic phase are mixed, vanadium-chromium separation is achieved through step-by-step reverse extraction, and vanadium-rich liquid and chromium-rich liquid are obtained; adjusting the pH value of the aluminum-containing raffinate to precipitate aluminum hydroxide, and calcining to obtain aluminum oxide; carrying out ammonium salt vanadium precipitation on the vanadium-rich liquid to obtain ammonium polyvanadate, and calcining to obtain vanadium pentoxide; and reducing the chromium-rich liquid, adjusting the pH value, precipitating chromium hydroxide, and calcining to obtain chromium sesquioxide. The method is high in leaching rate, small in slag amount, high in product purity and high in recovery rate.

The invention belongs to the field of vanadium batteries, and particularly discloses a vanadium battery key material as well as a preparation method and a preparation system thereof. The method comprises the following steps: adding ammonium salt and acid into an alkaline vanadium-containing leaching solution, and carrying out weak acid ammonium salt vanadium precipitation reaction under the conditions that the pH is 4-6 and the temperature is 20-85 DEG C to obtain a sodium ammonium decavanadate solid; the method comprises the following steps: mixing a sodium ammonium decavanadate solid with a solution containing ammonium ions, and carrying out solid-phase crystal transformation ammonium sodium replacement reaction at the temperature of 90-100 DEG C to obtain high-purity ammonium vanadate; directly calcining the high-purity ammonium vanadate or calcining the high-purity ammonium vanadate after re-dissolution recrystallization to obtain high-purity vanadium pentoxide; the high-purity vanadium pentoxide is used for preparing a vanadium battery key material. According to the scheme, the alkaline vanadium-containing leachate serves as the raw material, deep removal of impurities is achieved through weak acid ammonium salt vanadium precipitation and solid-phase crystal transformation ammonium sodium replacement, high-purity ammonium vanadate is prepared, high-purity vanadium pentoxide is further prepared, and the high-performance vanadium battery key material is prepared with the high-purity vanadium pentoxide serving as the raw material.

The invention discloses a rare-earth-based micron soil remediation catalyst as well as a preparation method and application thereof. The catalyst takes micron-sized silicon dioxide as a carrier, a composite oxide of cerium oxide and vanadium pentoxide as an active component and nano-particles of zinc oxide as a cocatalyst; on the basis of the mass of the carrier, the mass percentage content of the active component is 5-10%, and the mass percentage content of the cocatalyst is 5-10%. The catalyst synthesized through the method has the advantages of being good in soil compatibility, high in catalytic efficiency and the like, and the target of low-energy-consumption remediation of organic pollutant soil can be achieved.

The invention provides a graphite phase carbon nitride composite catalyst with light-dark continuous catalytic performance and a preparation method and application thereof, and belongs to the technical field of chemical catalysts. The raw materials of the catalyst comprise graphite phase carbon nitride, vanadium pentoxide and an MXene material, the vanadium pentoxide accounts for 2-10% of the mass of the graphite phase carbon nitride, the MXene material accounts for 3-7% of the mass of the graphite phase carbon nitride, the graphite phase carbon nitride powder and the vanadium pentoxide powder are mixed, ground and calcined, then are uniformly mixed with the MXene material, and are calcined again to obtain the catalyst. The graphite phase carbon nitride composite catalyst with light-dark continuous catalytic performance is obtained. By utilizing the synergistic effect of the three raw materials, the constructed composite catalyst is used for oxidative degradation of antibiotics (tetracycline hydrochloride) in a water body, and has an efficient light-dark continuous catalytic oxidation effect.

This application relates to the technical field of waste catalyst recovery, and specifically discloses a method for recovering valuable metals from vanadium-molybdenum-containing waste catalysts. The method includes the following steps: S1: Heating the vanadium-molybdenum-containing waste catalyst for roasting, continuously heating for roasting, and then cooling to obtain a roasted material; S2: Mixing the roasted material with sulfuric acid solution A containing oxalic acid, heating for leaching to obtain leaching solution A and residue A; Mixing residue A with sulfuric acid solution B containing thiourea and ethylenediaminetetraacetic acid, heating for secondary leaching to obtain leaching solution B and residue B, washing residue B with acid solution to obtain a washing solution; Combining the leaching solutions and the washing solution to obtain a combined solution; S3: Adjusting the pH of the combined solution to 2.5 - 3, then adjusting the pH to 4.5 - 5, adding dimethylglyoxime alcohol solution, heating to obtain a purified solution; Mixing the purified solution with an extraction solution evenly to obtain a vanadium-molybdenum-containing organic phase; S4: Back-extraction and product preparation. The ammonium molybdate and vanadium pentoxide obtained in this application have high purity, and the recovery rates of vanadium and molybdenum are relatively high.

A system for plant-mediated synthesis and characterization of vanadium pentoxide (V2O5) nanoparticles, comprising a structurally integrated device configured to perform extraction, reaction, calcination and performance evaluation within a closed automated control loop, wherein the system includes: a basic chassis made of heat-insulated stainless steel, which houses a microcontroller-based central control unit; a bioextract preparation unit fluidically connected to a reactive mixing chamber, the bioextract preparation unit comprising a Soxhlet extractor with a borosilicate condenser, a thermostatically controlled heating jacket and a digital thermocouple to maintain extraction temperatures between 60°C and 70°C; a precursor feed vessel containing an ammonium metavanadate solution with a molarity between 0.1 M and 0.3 M, wherein this vessel is connected to the reaction mixing chamber via an electromagnetically actuated inlet valve and a precision peristaltic pump; a reaction mixing chamber with an inductive heating coil, a magnetic stirrer plate and a temperature and pH monitoring device configured to maintain a uniform reaction temperature of 70±2°C during the precursor-extract interaction; a calcination module consisting of a muffle furnace lined with refractory ceramic material and containing embedded nichrome heating elements controlled by a PID-controlled temperature controller to achieve a heating rate between 5 °C and 10 °C per minute up to a setpoint of 445±5 °C for combustion synthesis; an optical characterization module with integrated UV-VIS spectrometer, Fourier transform infrared analyzer and photoluminescence detector, each optically isolated and electronically connected to the control unit; and a photocatalytic and antibacterial test chamber fluidically connected to the output of the calcination module, the chamber comprising a UV irradiation array, an optical absorption sensor and a temperature-controlled bacterial incubation plate, the central control unit includes a programmable logic controller (PLC) configured to synchronize the operation of all submodules via feedback control loops, which receive data from temperature, pH and optical sensors, thereby automating the synthesis, analysis and testing of V2O5 nanoparticles.

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.

The present application relates to a kind of carbonized silicon crucible for aluminum alloy smelting and its preparation method.The technical scheme is: carbonized silicon particle A, carbonized silicon particle B, carbonized silicon fine powder A, carbonized silicon fine powder B and xylitol are mixed, immersed in silica sol, dried, heat treated;Silicon dioxide coated carbonized silicon obtained by heat treatment is mixed with alumina powder, vanadium pentoxide and deionized water, to obtain mixed slurry, additional binder, sintering aid, polyacrylamide and gum arabic, mix, ball mill, to obtain carbonized silicon slurry.After exhausting, carbonized silicon slurry is placed in gypsum mold for preparing crucible, stand, pour out excess carbonized silicon slurry, continue to stand, take out the carbonized silicon body after standing, indoor curing, drying, heat treatment at 1300-1500 DEG C, to obtain carbonized silicon crucible for aluminum alloy smelting.The carbonized silicon body prepared by the present application is not easy to break, the sintering temperature of the product is low, the compressive strength is large, the thermal shock stability is high, and the resistance to aluminum alloy melt erosion is strong.

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 present invention discloses a method for controlling the yield of vanadium-aluminum alloy, which specifically comprises the following steps: (1) using a copper crucible and a graphite furnace body as a thermite reaction vessel; (2) mixing flaky vanadium pentoxide, aluminum particles and a slag-forming agent uniformly and adding the mixture to the thermite reaction vessel; (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover; (4) igniting a magnesium strip to initiate the thermite reaction; (5) removing the furnace cover and the furnace body 5 to 8 minutes after the thermite reaction ends; (6) stopping the cooling water supply when the alloy ingot cools to 950°C and installing a heat-insulating furnace cover on the copper crucible; (7) cooling the alloy ingot naturally for 24 to 48 hours, and finishing the alloy after cooling to obtain a vanadium-aluminum alloy product. The present invention can increase the yield of vanadium-aluminum alloy to more than 86%.

The invention provides a Cu modified V / Pt / TiO2 catalyst, a preparation method and application, and belongs to the field of industrial methanol removal and environmental protection, the carrier of the catalyst is TiO2, and the active components comprise vanadium pentoxide (V2O5), platinum (Pt) and copper oxide (CuOx). A two-step impregnation method is adopted for preparation, Pt / TiO2 is prepared through the first-step impregnation method, a Cu-V / Pt / TiO2 catalyst is prepared through the second-step impregnation method, and in the air atmosphere, the powdery SCO methanol removal catalyst is obtained through roasting. The raw materials used for preparing the catalyst are easy to obtain, and the process for preparing the catalyst is simple and convenient to operate; the catalyst has excellent methanol removal activity in a wide temperature range of 220-450 DEG C.

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.