81 results about "Vanadyl acetylacetonate" patented technology

The invention discloses a ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode and a preparation method and application thereof. The preparation method comprises the following steps: firstly, depositing bismuth oxyiodide on the surface of conductive glass, then coating the surface with the deposited bismuth oxyiodide with a dimethyl sulfoxide solution of vanadyl acetylacetonate, annealing, performing alkali soaking and rinsing with water to remove excessive vanadium pentoxide, and then drying to obtain a bismuth vanadate photoelectrode, and modifying ferro-nickel oxyhydroxide on the surface of the bismuth vanadate photoelectrode by adopting a cyclic voltammetry method in a three-electrode system, thus obtaining the ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode. The invention further discloses applications of the ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode in photoelectrocatalytic decomposition water. The prepared photoelectrode is used for producing hydrogen from photoelectrocatalytic decomposition water, can inhibit the compounding of photon-generated carriers, the service life of carriers generated by a BiVO4 photoelectrode can be effectively prolonged, and the oxygen evolution reaction on the surface of the photoelectrode can be promoted, so that the solar optic hydrogen conversion efficiency of a semiconductor photoelectrode can be improved.

The invention discloses a preparation method of a lithium ion battery negative electrode spherical V2O3/C composite material with multilevel structure and relates to a preparation method of a lithium ion battery negative electrode material, and the preparation method is used for solving the problem that first-time charging and discharging coulombic efficiency is low and the charging and discharging cyclic stability is poor as the existing V2O3 is used as the lithium ion battery negative electrode material. The method comprises the following steps: firstly, adding vanadyl acetylacetonate and glucose into absolute ethyl alcohol, and stirring to obtain mixed liquor; secondly, adding hydrogen peroxide liquor into the mixed liquor to adjust pH value, heating and reacting, cleaning and drying products to obtain a carbon-coated vanadium oxide precursor thirdly, sintering and cooling the carbon-coated vanadium oxide precursor to the room temperature. According to the invention, the material used as a lithium ion battery negative electrode has higher first-time charging and discharging coulombic efficiency and excellent cyclic stability; the first-time charging and discharging capacity of the material reaches 1000 mAh/g, the first-time charging and discharging coulombic efficiency is 72.4%, and 50-time cyclic capacity is kept over 700 mAh/g.

The invention relates to an electrochemical method for improving the photoelectric performance of a nano bismuth vanadate film. The method comprises the following steps of: spin-coating bismuth vanadate colloid prepared from a Bi(NO3)3.5H2O-acetic acid solution and a vanadyl acetylacetonate-acetylacetone solution on clean indium tin oxide (ITO) conductive glass, and roasting to obtain the nano bismuth vanadate film; preparing an aqueous solution of sodium perchlorate as electrolyte; and putting the nano bismuth vanadate film into the electrolyte, and performing electrochemical surface treatment for 1 to 20 minutes by using the nano bismuth vanadate film as a working electrode, using a platinum electrode as a counter electrode, using a saturated calomel electrode as a reference voltage and applying a voltage of minus 0.2V to minus 0.5V. The method is simple in equipment, convenient to operate, high in controllability and low in cost, can be used for greatly improving the photoelectric performance of the nano bismuth vanadate film, and is expected to be applied in the field of semiconductor photovoltaic and photolysis water.

The invention belongs to the field of chemical functional materials, relating to a low-temperature preparation method and application of a vanadium dioxide film. The preparation method adopts vanadyl acetylacetonate with low toxicity as a reactant; at the temperature of 250 DEG C -750 DEG C, the vanadium dioxide film with phase change characteristics is obtained under the condition of controlling sintering atmosphere. The phase change temperature of the film can be adjusted to be approached to the room temperature. The method has small energy consumption, simple preparation technology and favorable safety; and the obtained vanadium dioxide film has low sintering temperature and is suitable for industrial production in a large scale.

The invention belongs to the technical field of nano composite materials and relates to a synthesis method of a BiVO4-Ni/Co3O4 heterojunction. The synthesis method comprises the following steps of: growing a layer of BiOI nanoparticles on an FTO substrate by adopting an electro-deposition method; dropwise adding a vanadyl acetylacetonate aqueous solution on the surface of the FTO; performing calcining at a high temperature to generate bismuth vanadate (BiVO4); obliquely placing FTO in a deionized water solution containing Co (NO3) 2.6 H2O, Ni (NO3) 2.6 H2O, C6H12N4, CH4N2O and NH4F through continuous ion adsorption reaction; performing hydrothermal reaction at 120-200 DEG C for 2-5 hours, taking out an obtained product, cleaning the product with deionized water; annealing the product at 300-500 DEG C for 1.5-3 hours; and naturally cooling the product to room temperature to obtain the BiVO4-Ni/Co3O4 heterojunction. The prepared heterojunction is used as a photoelectrode to be applied tophotoelectrochemical hydrolysis reaction. According to the preparation method, a simple electro-deposition method and a hydrothermal method are utilized, therefore, the method is simple in operationand has good repeatability; the used materials are low in cost, large in reserves and non-toxic, and meets the requirement for environmental friendliness; the prepared material can significantly reduce the interface reaction barrier, effectively inhibit solid-liquid interface charge recombination, accelerate water oxidation reaction kinetics and improve the photocurrent density so as to better utilize solar energy.

The invention discloses a preparation method of a flexible electrode material. According to the preparation method, A flexible vanadium pentoxide electrode material is prepared through sintering treatment by utilizing a flexible carbon cloth which has the advantages of light weight, high strength, fast electronic transmission and the like as the substrate of a lithium battery electrode material and taking organic vanadium (vanadyl acetylacetonate or vanadium acetylacetonate) as a main raw material. The preparation method disclosed by the invention has the characteristics of simple process, moderate reaction condition, low energy consumption, no pollution and the like. Compared with other preparation processes, the preparation method disclosed by the invention has obvious advantages. The electrode material prepared through the method disclosed by the invention has the advantages of good flexibility, light weight, good cyclic stability and excellent magnification property, and can be applied to a flexible energy storage device, and the preparation method can be popularized to the preparation of other flexible oxide (iron oxide, manganese oxide, cobalt oxide, nickel oxide and the like) electrode material.

The invention belongs to the field of materials and discloses a method for preparing a conductive glass (FTO)-loaded tungsten trioxide (WO3)/vanadium pentoxide (V2O5) composite photoelectrode (WO3/V2O5/FTO). The method comprises the following steps: adopting vanadyl acetylacetonate and ammonium tungstate as raw materials, polyvinylpyrrolidone (PVP) as an auxiliary material, and dimethylformamide (DMF) and oxalic acid solution as solvents; loading a composite precursor onto conductive glass according to an electrostatic spinning technology and finally carrying out high-temperature roasting to obtain a WO3/V2O5/FTO composite photoelectrode material with high photo-electro-catalytic activity. The material is characterized through scanning electron microscope (SEM), X-ray diffraction (XRD), thermo-gravimetric-differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared ray spectroscopy (FT-IR) and other means, so that the fiber material obtained by the method disclosed by the invention can be discovered that the release is uniform, and the diameter is 100-150 nm. The WO3/V2O5/FTO composite photoelectrode material prepared by adopting the method disclosed by the invention is simple in process and has higher photocatalysis under visible light.

The invention discloses a high-capacity VNb9O25 nanosheet lithium ion battery negative electrode material and a preparation method thereof. The preparation method comprises the following steps dissolving niobium pentachloride in ethanol, adding a certain amount of vanadyl acetylacetonate powder into the solution, completely dissolving the mixed solution through ultrasonic oscillation, dropwise adding a tetramethylammonium hydroxide aqueous solution into the mixed solution, and stirring at a constant speed to completely dissolve the tetramethylammonium hydroxide aqueous solution; putting the obtained solution into a high-pressure reaction kettle, and carrying out a heating reaction; and cooling, washing, drying, and roasting to obtain the VNb9O25 nanosheet lithium ion battery negative electrode material. According to the invention, the VNb9O25 nanosheet lithium ion battery negative electrode material prepared by the preparation method disclosed by the invention is nanoscale and good indispersity, and has the advantages of high specific capacity, good cycle performance and the like when being used as the lithium ion battery negative electrode material.

A preparation method of vanadium trioxide/carbon as a supercapacitor electrode material belongs to the field of electrochemical energy storage, and comprises the following steps: taking vanadyl acetylacetonate and glucose as raw materials, preparing a V2O3/C composite material through a hydrothermal method and subsequent annealing, taking the V2O3/C composite material as an electrode of a supercapacitor, and taking a Na2SO4 aqueous solution as an electrolyte to assemble a symmetrical water-based supercapacitor. The raw materials are cheap, and the preparation process is simple; the V2O3/C hollow nanosphere has a wide voltage window of -1.1-1.3 V (vs.Ag/AgCl), and the specific capacitance of the V2O3/C hollow nanosphere can reach 708.6 F g-1; the V2O3/C hollow nanosphere is used as an electrode, the Na2SO4 aqueous solution is used as an electrolyte, the working voltage of the prepared symmetric supercapacitor can reach 2.4 V, and the symmetric supercapacitor has ultrahigh energy densityof 96.8 W h kg-1 and excellent cycling stability.

The invention discloses a preparation method for a Schiff base oxovanadium complex crystal with bioactivity. In the method, vanadyl acetylacetonate is used as a vanadium source, Schiff base obtained through one-step reaction of acetylacetone in the vanadyl acetylacetonate and alanine is used as a ligand, 2, 2-dipyridyl is used as a second ligand; the materials are placed in a refrigerator to enable the crystal to grow; a test result shows that the crystal has bioactivity, the average inhibition ratio to PTP1B enzymes is 70.61-70.69%, and the IC50 is equal to 11.27-11.36 [mu]g/mL (dimethyl sulfoxide is used as a solvent). According to the invention, the complex crystal with a good crystal form and high activity can be obtained through the adoption of one-step synthesis and the utilization of a mixed solvent; the method is simple, easy to operate and short in consumed time; compared with similar compounds, the synthesized crystal has good antidiabetic activity.

The invention relates to a method for preparing vanadium trioxide powder by using a one-step hydrothermal method, wherein the method comprises: adding a reducing agent to a vanadium source aqueous solution, transferring to a closed reactor, carrying out a hydrothermal reaction for 6-48 h at a temperature of 200-300 DEG C under a pressure of 0.1-20 MPa, and carrying out centrifugal separation to obtain the vanadium trioxide powder, wherein the vanadium source is orthovanadate (V) or/and a vanadyl salt (IV), preferably at least one selected from Na3VO4, K3VO4, Rb3VO4, Cs3VO4, VOSO4, VOCl2, vanadyl acetylacetonate and vanadyl oxalate, the reducing agent is at least one selected from oxalic acid, hydrazine and alcohol, and preferably the alcohol is at least one selected from methanol, ethanol,n-propanol, isopropanol, n-butanol and isobutanol.

The invention relates to glass flake modified epoxy resin anti-corrosive paint. The glass flake modified epoxy resin anti-corrosive paint is characterized by being prepared from the following raw materials of epoxy resin E51, butadiene rubber, tetrahydrofuran, 3-chloroperoxybenzoic acid, vanadyl acetylacetonate, sodium periodate, sodium borohydride, 3,3'-Dimethyl-4,4'-biphenylene diisocyanate, sodium dodecyl sulfate, xylene, n-butanol, a silane coupling agent UP-151, titanium dioxide, glass flakes, a dispersing agent SK-5040, an antifoaming agent PA-311, N,N-bi(2-hydroxypropyl )benzenamine, chloroform, and an appropriate amount of ethanol. The anti-corrosive paint provided by the invention has the advantages of being high in salt water resistance, good in anticorrosion properties, non-toxic, environmental-friendly and the like.

The invention discloses a hydrophobic plastic film material of a nonwoven cloth. The hydrophobic plastic film material is prepared from the following raw materials in parts by weight: 130 to 150 partsof polypropylene, 4 to 6 parts of allyl polyethylene glycol, 0.7 to 1 part of 8-hydroxyquinoline, 2 to 3 parts of lanolin, 1 to 2 parts of melamine, 5 to 7 parts of borax, 1 to 2 parts of stabilizer,2 to 4 parts of polyvinyl butyral ester, 0.1 to 0.3 part of hydrogenated castor oil, 30 to 35 parts of tetraethoxysilane, 4 to 7 parts of precipitated barium sulfate, 0.07 to 0.1 part of vanadyl-acetylacetonate, 3 to 4 parts of oxidized polyethlene wax, and 1 to 2 parts of dodecafluoro heptyl propyl trimethoxysilane. The hydrophobic plastic film material has the advantages that the stability is good, and the comprehensive property is excellent.

The invention discloses a rhodium-doped strontium titanate ultrathin nano-layer covered bismuth vanadate photoanode, and a preparation method and application thereof. A BiOI precursor is deposited onthe surface of a fluorine-doped tin oxide (FTO) in a mode of electrochemical deposition; a 0.2M vanadyl acetylacetonate solution is used for exchanging to obtain a bismuth vanadate electrode, and excess V2O5 is removed by using a NaOH solution; and the BiVO4-Rh-SrTiO3 photoanode is synthesized. According to the rhodium-doped strontium titanate ultrathin nano-layer covered bismuth vanadate photoanode provided by the invention, after SrTiO3 subjected to Rh doping is compounded with BiVO4, the photoelectrochemical performance is obviously improved; the electrochemical performance is best when theRh doping amount is 5%; the effect of a heterojunction formed between the BiVO4 and the Rh5%-SrTiO3 is very weak, so that the Rh5%-SrTiO3 exerts a good effect of producing oxygen and assisting catalysis, and the reaction energy barrier of the electrode and an electrolyte contact interface is effectively reduced. In addition, reaction activity sites of the contact interface are increased, so thatholes in a bismuth vanadate valence band can be effectively transferred to the surface of the electrode for an oxidation reaction with water, and the photogenerated electron holes are effectively separated.

The invention discloses a preparation method of a polydopamine derived carbon-coated calcium vanadate nanosheet composite material, belongs to the technical field of lithium ion battery and sodium ionbattery electrode materials, and aims to solve the problems that the first-circle coulombic efficiency of three-dimensional nano CaV4O9 is relatively low and the stability is poor in a relatively long charge-discharge cycle process. The preparation method comprises the following steps of performing hydrothermal reaction on calcium chloride and vanadyl acetylacetonate to generate calcium vanadate,preparing a Tris solution, adding the calcium vanadate into a mixed solution of dopamine hydrochloride and Tris, performing polymerization coating, and finally performing constant-temperature calcination to obtain the nitrogen-doped carbon-coated CaV4O9 composite material. The composite process is simple in method, forms a composite structure, increases the specific surface area and pore size distribution, is beneficial to improving the electrochemical performance, is environment-friendly, and can be suitable for large-scale production.

The invention discloses a preparation method for a crystal of a Schiff base vanadyl complex with biological activity. The preparation method comprises: taking vanadyl acetylacetonate as a vanadium source, taking a Schiff base obtained through one-step reaction of 3-chloropropylammonium chloride solid and salicylaldehyde as a ligand, standing at room temperature to grow the crystal. Test results show that the crystal shows biological activity and has an inhibition rate on PTP1B enzyme of 46.12-49.29%. By employing one-step synthesis and utilizing a mixed solvent and a room-temperature standing process, the complex crystal with extremely good crystal form can be obtained; the method is simple, easy to operate and short in consumed time; and the synthesized crystal has better anti-diabetes activity compared with same kinds of compounds.

The invention discloses an abrasion-resistant high-molecular plastic gear, which is prepared from the following ingredients in parts by weight: 90 to 95 parts of polyformaldehyde, 5 to 8 parts of carbon fiber, 3 to 5 parts of nimustine, 1 to 2 parts of ferroferric oxide, 2 to 3 parts of vanadyl-acetylacetonate, 1 to 3 parts of precipitated barium sulphate, 1 to 3 parts of BMU, 2 to 4 parts of 1-hydroxyethyl-2-oleic imidazoline, 3 to 5 parts of 2-ethylhexanol, 1 to 3 parts of nanometer additives, 1 to 3 parts of DINZ, 1 to 4 parts of antioxidant 1010 and 2 to 4 parts of tremolite powder. By using the mode, the abrasion-resistant high-molecular plastic gear has the advantages of good abrasion-resistant performance and long service life.

The invention discloses a preparation method and a use method of an amorphous vanadium oxide/carbon fiber material for a lithium-sulfur battery, and belongs to the field of lithium-sulfur batteries. The preparation method comprises the following steps of adding the dimethyl formamide into the weighed vanadyl acetylacetonate; stirring with a magnetic force for a certain period of time, dissolving sufficiently, and adding the 4-4 diaminodiphenyl ether, adding the pyromellitic dianhydride in batches under a mechanical stirring condition after carrying out ultrasonic treatment for a certain periodof time, stirring for a certain period of time to obtain a precursor solution, carrying out high-temperature treatment after electrostatic spinning, converting the precursor solution into a nanofibernet containing amorphous vanadium oxide through the steps of high-temperature carbonization and the like, and using the nanofiber net as an additive layer of the lithium-sulfur battery. The fiber interlayer plays a good role in limiting an intermediate product of the lithium-sulfur battery and provides the good electrical conductivity, a binder and a conductive agent do not need to be added whenthe interlayer is prepared, and the subsequent battery performance tests also prove that the interlayer greatly improves the performance of the lithium-sulfur battery.

The invention discloses a hydrophobic high-elasticity composite material. The hydrophobic high-elasticity composite material is prepared from, by weight, 0.6-1 part of stannous sulfide, 1-2 parts of polybenzimidazole, 0.3-1 part of dodecafluoroheptylpropyltrimethoxysilane, 10-13 parts of thermoplastic polyurethane, 3-5 parts of dioctyl azelate, 100-120 parts of high-density polypropylene, 1-2 parts of ammonium molybdate, 0.1-0.3 part of vanadyl acetylacetonate, 0.5-1 part of hexamethylphosphoramide, 10-13 parts of bentonite, 3-4 parts of polytetramethylene glycol, 0.7-1 part of sodium dodecyl sulfate, 1-2 parts of calcium ricinoleate, 0.1-0.2 part of divinyl benzene, 3-4 parts of palm wax and 0.8-2 parts of alkenyl succinic anhydride. The hydrophobic high-elasticity composite material can be used as a gasket material of a large machine and also can be used as a waterproof material and the like, and the hydrophobic high-elasticity composite material is wide in application range and superior in comprehensive performance.

The invention discloses a rubber product with high alkaline resistance. The rubber product is prepared from, by weight, 50-60 parts of natural rubber, 10-20 parts of neoprene, 5-10 parts of polyethylene wax, 5-10 parts of linoleic acid, 2-5 parts of octyl-phenolic curing resin, 1-2 parts of curing resin, 5-20 parts of ethylene propylene rubber, 5-20 parts of fluorous rubber, 0.5-1 part of magnesium stearate, 5-10 parts of barium sulfate, 5-10 parts of vanadyl acetylacetonate, 1-5 parts of aluminum hydroxide, 5-10 parts of tributyl phosphate, 10-20 parts of polymethyl methacrylate, 5-20 parts of polyving akohol, 5-10 parts of titanium dioxide, 10-20 parts of methyl methacrylate, 5-10 parts of anti-aging agents and 5-10 parts of plasticizer. The invention further discloses a preparing method of the rubber product. The alkaline resistance of the rubber product is improved through optimization of the formula.

The invention provides a method for preparing a bismuth vanadate film through two-step spray pyrolysis. The method comprises the following steps: taking a mixed organic solution containing ammonium iodide and bismuth nitrate as a precursor; controlling the temperature of the conductive substrate to be 200-400 DEG C, atomizing the precursor solution, spraying the atomized precursor solution on the conductive substrate, and controlling the spraying speed to be 0.1-2 ml/cm<2>/min and the total spraying amount to be 5-20 ml/cm<2> to form a BiOI film; and then, uniformly spraying the molybdenum-doped vanadyl acetylacetonate DMSO mixed solution on the BiOI film at the temperature of 80-120 DEG C, and calcining at the temperature of 300-500 DEG C for 1-5 hours to obtain the bismuth vanadate film. The method is low in cost, simple and easy to operate, can be used for preparing the bismuth vanadate film with a nano structure, a large area and high performance, and can be used as a photo-anode for hydrogen production by photoelectrocatalytic decomposition of water.

The invention relates to a magnetic cis-polybutadiene rubber modified epoxy resin anticorrosive coating material, which is characterized in that the magnetic cis-polybutadiene rubber modified epoxy resin anticorrosive coating material is prepared from an epoxy resin E51, a cis-polybutadiene rubber, tetrahydrofuran, t-butyl hydroperoxide, vanadyl acetylacetonate, sodium periodate, aluminum borohydride, hexamethylene diisocyanate, trimethylolpropane, octylphenol polyoxyethylene ether ammonium sulfate, disodium dodecyl diphenyl ether sulfonate, xylene, n-butanol, anhydrous ethanol, tetraethyl orthosilicate, Fe3O4, cocamidopropyl betaine, carboxymethyl cellulose, N,N-di(2-hydroxypropyl)aniline, chloroform, a proper amount of 25% ammonia water, and a proper amount of deionized water. The magnetic cis-polybutadiene rubber modified epoxy resin anticorrosive coating material of the present invention has advantages of strong salt water resistance, good corrosion resistance, no toxicity, environmental protection, and the like.

The invention relates to a vanadium pentoxide (V2O5) material with a large specific surface area and a preparation method thereof. The V2O5 material is formed by irregularly cross connecting a plurality of tubular nanometer crystals; a tube wall of each tubular nanometer crystal is formed by mutually connecting single crystal particles; and holes exist among the particles. The preparation method of the material comprises the following steps of: adopting a chemical vapor deposition method; using a CVD (Chemical Vapor Deposition) preparation system; taking vanadyl acetylacetonate (VO (acac) 2) as a raw material; putting into an evaporator; and reacting steam formed by the evaporator with oxygen in carrier gas under a certain temperature to synthesize a V2O5 porous nanometer structure. The advantages are that: the V2O5 material has the large specific surface area, and has good circularity, quick Li ion electrochemical kinetics action and large storage capacity as a Li battery cathode material; and the synthesization process is simple, the purity of the material is high, the yield is large, the energy consumption is low, and the V2O5 material is suitable for being industrially produced in large scale and has good application prospect.

The invention discloses a vanadium oxide/TS-1 heterogeneous catalyst obtained by combining vanadyl acetylacetonate and a TS-1 type titanium-silicon molecular sieve. The preparation method comprises the following steps: dissolving vanadyl acetylacetonate in methanol, adding a TS-1 type titanium-silicon molecular sieve, and carrying out stirring, dipping, filtering, freeze-drying, roasting and othersteps to obtain the VOX/TS-1 supported catalyst with the vanadium content of 1-5%. According to the invention, the preparation method is simple, the cost is low, and the yield is 100% in terms of vanadium; and by using the vanadium oxide/TS-1 as a catalyst, the catalytic efficiency can be improved while the excessive oxidation of 2,5-dichlorophenol can be effectively inhibited, the excessive oxidation product can be controlled to be 5% or less, the selectivity of 2,5-dichlorophenol can achieve 95% or more, especially the isomer 2,4-dichlorophenol can be significantly inhibited, the selectivity of 2,4-dichlorophenol is less than 0.1%, and the supported catalyst has advantages of easy recovery and reutilization.