357 results about "Polyoxometalate" patented technology

One aspect of the present invention relates to a microsphere, comprising a hydrophilic polymer comprising a plurality of pendant anionic groups; a transition-metal, lanthanide or group 13-14 metal oxide, polyoxometalate or metal hydroxide or combination thereof; and a first radioisotope that emits a therapeutic β-particle. In certain embodiments, the microsphere further comprsies a second radioisotope that emits a diagnostic γ-ray; wherein the atomic number of the first radioisotope is not the same as the atomic number of the second radioisotope. In certain embodiments, the microsphere is composed of polymer impregnated with zirconia bound to ³²p as the source of the therapeutic β-emissions and ⁶⁷Ga as the source of the diagnostic γ-emissions. Another aspect of the present invention relates to the preparation of a microsphere impregnated with a radioisotope that emits therapeutic β-particles and a radioisotope that emits diagnostic β-emitting radioisotope and a γ-emitting radioistope; wherein the atomic number of the first radioisotope is not the same as the atomic number of the second radioisotope. In certain embodiments, said microspheres are administered to the patient through a catheter. In another embodiment, the microsphere is combined with the radioisotopes at the site of treatment.

The invention relates to the technical field of photocatalytic materials, and relates to a preparation method and an application of bimetallic photocatalytic functional POM/MOFs. Bimetallic photocatalytic functional POM/MOF target materials with a porous structure are prepared through a hydrothermal synthesis technology or a layered diffusion technology with polyoxometalate POM as a functional group, L as a connection ligand and Cu<2+>, Co<2+> or Fe<2+> in a transition metal salt Tm as nodes, and the target materials POM/MOFs are applied in a functional photocatalytic carbon- carbon coupling reaction. The preparation method has the advantages of simple synthetic steps, easy operation, low energy consumption and high yield, and the obtained functional materials have the advantages of stable chemical properties, and easy large-area popularization and application. The MOF photocatalytic materials have a large specific surface area, have a very good conversion rate and reusability under the irritation of a 18W energy saving lamp when the use amount is 6/1000 of the amount of a substrate, and are suitable for the needs of large-scale industrial production.

An adsorbent for carbon dioxide may include a composite metal oxide including a divalent first metal (M¹), a trivalent second metal (M²), and at least one polyoxometalate (POM) ion selected from an anion represented by a first formula (e.g., Chemical Formula 1) and an anion represented by a second formula (e.g., Chemical Formula 2). A capture module for carbon dioxide may include the adsorbent.

The invention discloses a craft for producing pyromellitic dianhydride catalyzed by a carrier-type poly-oxometalate, including melting the pyromellitic dianhydride by the groove, feeding to the mixing machine for evapouration after pre-heating with a feed concentration of 15.0-19.5g/m3, mixing with the air, entering into the fixed bed reactor for a oxidation, oxidating with an airspeed of 4500-6500 h-1, cooling the produced air, then condensing in the collector, getting coarse pyromellitic dianhydride. At 300-340 DEG C, the catalyzer is mostly poly-oxometalate which is fixed on the catalyst bed after loading. The mass ratio of the catalyzer to pyromellitic dianhydride is 0.2-1%. The invention has the durene in the C10 heavy aromatics as raw material, produces the pyromellitic dianhydride by oxidation in air, makes the C10 heavy aromatics be with a higher added value, uses the current resource and industrial equipments as more as possible, exploits the catalysis and synthesis path of the pyromellitic dianhydride. The invention has a low pollution and production cost, a wide development prospect and is suitable for commercial process.

The present invention relates to novel compositions comprising a metal component selected from a group chosen from at least one polyoxometalate, at least one heteropolyoxometalate and a mixture thereof; and, at least one organic component. The present invention also relates to methods of preparing the nanorod arrays and the nanorod materials and films. The present invention also relates to novel compositions to generate metal-oxide rich films, and also relates to processes for via or trench filling, reverse via or trench filling and imaging with underlayers. The materials are useful in wide range of manufacturing applications in many industries, including the semiconductor devices, electro-optical devices and energy storage industry.

The present invention provides a catalyst capable of producing an epoxy compound in high yield and improving the utilization efficiency of the oxidizing agent as well as a method of producing an epoxy compound using that catalyst. A catalyst for producing an epoxy compound by oxidizing a compound having at least one ethylenic double bond with an oxidizing agent, comprising a polyatom-containing heteropolyoxometalate anion (A1) having two defective and/or three defective structure sites and containing silicon as the heteroatom, and an element (E1) being at least one element selected from the group consisting of vanadium, tantalum, niobium, antimony, bismuth, chromium, molybdenum, selenium, tellurium, rhenium, cobalt, nickel, ruthenium, rhodium, palladium, osmium, platinum, iridium, silver, gold, zinc, aluminum, gallium, indium, scandium, yttrium, titanium, zirconium, hafnium, germanium, tin and lanthanoids, and being different from the polyatom.

The invention belongs to a chemical synthesis method, and relates to a method for utilizing a hydrothermal synthesis technique to prepare a highly-dispersed solid-supported Keggin-type polymetallic acid oxide salt crystalline catalyst. The method mixes certain amount of Keggin-type heteropoly acid or heteropolyacid salt, trimesic acid, copper salt and various methyl ammonium salts in water, and then obtains a crystal of the solid-supported catalyst under the condition of hydrothermal authigenic pressure. Polyacid catalysts are dispersed in a microporous metal-organic frame in a unimolecular form. The method can accurately determine the composition, structure and supported amount of the catalyst, and the supported amount of the catalyst is up to over 45 percent. The catalyst of the invention has the advantages that the catalyst can not drain away, is high in thermal stability, resistant to acid and alkali, stable and insoluble in water and common organic solvents, such as various solvents such as alcohol, cyanide, ketone, chloroform, and is an ideal catalyst for realizing heterogeneous catalytic reaction.

The invention discloses an electrode material for a polyoxometallate carbon nanotube lithium ion battery. The electrode material is synthesized through oxidation of lithium polyoxometallate and functionalization of a carbon nanotube. The lithium polyoxometalate Li3XY12O40 has a three-dimensional skeleton structure, and lithium ions can be conducted in a three-dimensional skeleton; after oxidation and functionalization, the polyoxometalate is adsorbed on the wall of the carbon nanotube; and thus, the lithium ion transport characteristic is improved through the polyoxometalate, the electron transport characteristic is improved through the carbon nanotube, and double requirements of the electrode material on lithium ion transport and electron transport are met.

Embodiments of the present invention relate generally to redox flow batteries and, more specifically, to flow batteries that employ electron-ferrying redox compounds made from polyoxometalates (“POMs”). Embodiments of the present invention employ flow-battery technology that combines the fast electrochemical reaction of a battery with the fuel flexibility of a fuel cell to meet next-generation energy needs of a variety of power applications, including portable electronics used in military and commercial applications and large power modules that provide 550 W or more. To obtain a high-power-density stack, a reduced form of liquid POM is fed to the stack of cells, in certain embodiments of the present invention, where the reduced form of liquid POM is efficiently oxidized into liquid products at the anodes. Air is fed and reduced at the cathodes, generating water as a byproduct.

The invention relates to a copper complex based on a dipyridine bisamide organic ligand and Keggin type polyoxometalate, its synthetic method and its application. A molecular formula is one of the following formulas: [Cu2(L<1>)3(H2O)6(SiMo12O40)].2H2O; [Cu2(L<2>)3(H2O)6(SiMo12O40)].9H2O; [Cu2(L<2>)3(H2O)6(SiW12O40)].6H2O; [Cu2(L<3>)3(H2O)6(SiMo12O40)].6H2O; [Cu2(L<3>)3(H2O)6(SiW12O40)].6H2O; wherein L<1> is N, N'-di(3- pyridylformamido)-1,2-ethane; L<2> is N, N'-di(3-pyridylformamido)-1,4-butane; L<3> is N, N'-di(3-pyridylformamido)-1,6-hexane. The method comprises the following steps: addingdeionized water in the Cu(NO3).3H2O, Keggin type polyoxometalate, dipyridine diamide organic ligand, stirring under room temperature, regulating pH value, dumping in a high pressure reaction vessel and heating, insulating under hydrothermal condition, cooling to the room temperature to obtain bulk blue green crystals, alternatively cleaning by deionized water and ethanol, naturally drying under room temperature to prepare the copper complex based on dipyridine bisamide organic ligand and Keggin type polyoxometalate. The complex has the advantages of simple synthetic method, easy crystallization, high synthesis yield, strong affinity capability to water-soluble pollutants and good catalytic degradation effect, and can be used as photocatalysis materials.

The invention relates to a method for synthesizing adipate using cyclohexene oxide through oxidation, which uses the tungsten and molybdenum polyoxometalates as the catalyst, and the hydrogen peroxide solution as the oxidant to catalyze the oxidation of the cyclohexene oxide to synthesize the adipate. The invention is characterized in that the organic solvent is no longer used as the reacting medium, so as to avoid the environment pollution caused by using the nitric acid as the oxidant. The reacting temperature is 60 to 105 DEG C; the reacting time is 6 to 20 hours and the adipate yield can reach 46.9% to 83.2%.

The invention relates to polyoxometalate-based metal-organic frameworks crystal material assembled with polyoxometalates as a template, and relates to the polyoxometalate-based metal-organic frameworks crystal material assembled with the polyoxometalates as the template. The invention aims to solve the problem that a semiconductor structure formed between end oxygen of the polyoxometalates (POMs)in polyoxometalate-based metal-organic frameworks (POMOFs) crystal material synthesized by the prior art and metals in metal-organic frameworks (MOFs) has the conduction band greater than 0, resultingin a fact that the POMOFs material has no effect of hydrogen production by decomposing water under irradiation of a xenon lamp. The designed and developed POMOFs crystal material with the polyoxometalates as the template has the chemical formula of [CuI2(PPZ)4][H2GeW12O40].8H2O. A method comprises the steps: dissolving germanotungtic acid, copper chloride and 3-(pyridin-4-yl)pyrazole organic ligands in deionized water, adjusting the pH value, and then carrying out reaction for 3 d at the temperature of 160 DEG C. The POMOFs crystal material assembled with the polyoxometalates as the templatecan be obtained.

The present invention relates to hydrogenation catalysts prepared from polyoxometalate precursors. The polyoxometalate precursors introduce a support modifier to the catalyst. The catalysts are used for hydrogenating alkanoic acids and/or esters thereof to alcohols, preferably with conversion of the ester coproduct. The catalyst may also comprise one or more active metals.

An aqueous liquid cleaning composition comprising a proteolytic enzyme and a primary stabiliser therefor, the composition further comprising a polyoxometalate.

The invention relates to a method for reduction of graphene oxide by using a polyoxometalate as an electro-catalyst and for preparation of a graphene and polyoxometalate composite. The prepared composite is a powder material with a porous structure and has potential application values in the aspects like catalysis and electrode materials for a lithium ion battery and an electrochemical capacitor. The method comprises a first step of preparation of graphene oxide, a second step of preparation of mixed liquor of graphene oxide and the polyoxometalate, a third step of electrochemical reduction of graphene oxide by the polyoxometalate, a fourth step of separation of the graphene and polyoxometalate composite, etc. According to the invention, electrons are transferred from a working electrode to the polyoxometalate at first, so the polyoxometalate obtains the electrons and is reduced into a heteropoly blue; then the electrons are transferred from the heteropoly blue to graphene oxide, so graphene oxide is reduced and the heteropoly blue loses the electrons and turns into initial polyoxometalate. During the process of reduction, the polyoxometalate can spontaneously adhere onto the surface of produced graphene so as to form the graphene and polyoxometalate composite.

The invention provides an ion sieve for extracting uranium from a water body and a preparation method thereof. The ion sieve is prepared from pyrophosphate, molybdate, zirconium oxychloride, hexadecyl trimethyl ammonium bromide, acrylonitrile, and hydroxylamine hydrochloride. The preparation method comprises the steps: preparing a hydrogen ion exchanger of zirconyl-molybdopyrophosphate polyoxometalate by using zirconium oxychloride, the molybdate and the pyrophosphate, introducing a defined amount of uranium ions to the hydrogen ion exchanger, extracting through immobilizing the uranium ions, and baking for forming; then radiating and activating, making a product obtained by radiating and activating react with hexadecyl trimethyl ammonium bromide for performing organic modification, and then adding acrylonitrile and hydroxylamine hydrochloride for performing amine oximation; finally, performing solid-liquid separation, and then performing steps of high-temperature sintering, cooling and grinding, and the like to obtain the ion sieve for extracting uranium from the water body. The prepared ion sieve has a most suitable crystal structure of receiving the uranium ions, shows an efficient selective effect, and has a chelation function and a good selectivity to the uranium ions.

The invention aims to develop a polyacid-based metal organic framework crystal material with an intercalation structure, which effectively overcomes the technical bottlenecks that a simple polyacid material is wide in band gap (3 eV), can only absorb ultraviolet light, is soluble in water, and has a recover rate, and the like. Special intercalation structure characteristics of the material are utilized to improve the electron storage capacity of polyacid as an electron acceptor, accelerate the separation of catalytic photo-generated carriers, enhance the photocatalytic efficiency of a catalyst, and expand the spectral absorption range to visible light. The chemical formula of the polyacid-based metal organic framework crystal material with the intercalation structure is designed and developed as [CuI2CuII5(ptz)6(OH)2(4H2O)GeW12O40].6H2O. A method for preparing the material comprises the following steps: dissolving germanium tungstate, copper chloride and 5-(pyridine-2-yl)tetrazole organic ligand into deionized water to obtain a reaction solution, adjusting a pH value, and then reacting at a temperature of 160 DEG C for 3 days. . The metal organic framework crystal material with thepolyacid-based intercalation structure having visible light catalytic properties can be obtained.

The invention discloses a molybdenum-containing polyoxometalate and adamantane hybrid compound, which is prepared by connecting molybdenum-containing polyoxometalate and adamantane through a covalent bond. The preparation method comprises the following synthesis steps of: 1) performing amidation reaction on adamantane carboxylic acid serving as an initial raw material and trishydroxymethyl aminomethane to obtain N-trishydroxymethyl-adamantane carboxamide; and 2) reacting with the molybdenum-containing polyoxometalate to obtain the hybrid compound. By the invention, the molybdenum-containing polyoxometalate and the adamantine are connected through the covalent bond for the first time; and the synthesis method is simple and feasible, reaction conditions are easy to realize, purification is simple, and the yield is high. The hybrid molecule has potential application value in the aspects of medicines, lubricants, surfactants, catalysts and the like.