364 results about "Polyoxometalate I" patented technology

This invention relates to proton exchanging film fuel battery self humidification complex film. It is self humidification complex proton exchanging film used in proton exchanging film fuel battery and its preparation method. Multiple oxometallate and solid high molecular electrolyte solution are sprayed or cast at one or two sides of t exchanging film to form self humidification complex film. The complex film made in this invention has strong self humidification effect, and its making technique is simple, material cost is low, so it can be used to self humidification proton exchanging film fuel battery which fuel is hydrogen and methanol.

Polyoxometalate topical compositions for removing contaminants from an environment and methods of use thereof are disclosed. An embodiment of the polyoxometalate topical composition includes a topical carrier and at least one polyoxometalate, with the proviso that the polyoxometalate is not H₅PV₂Mo₁₀O₄₀; K₅Si(H₂O)Mn^IIIW₁₁O₃₉; K₄Si(H₂O)Mn^IVW₁₁O₃₉; or K₅Co^IIIW₁₂O₄₀. Another embodiment relates to a method for removing a contaminant from an environment, including contacting the polyoxometalate topical composition with the environment containing the contaminant for a sufficient time to remove the contaminant from the environment. An additional embodiment relates to a modified material for removing a contaminant from an environment, wherein the modified material includes (1) a material comprising a topical carrier, a powder, a coating, or a fabric, and (2) a metal compound including a transition metal compound, an actinide compound, a lanthanide compound, or a combination thereof, wherein the metal compound is not a polyoxometalate.

Disclosed are catalysts including a heteropolyacid supported on a polyoxometallate salt having increased yields, conversions and selectivities in the conversion of alkanes. Also disclosed are methods of preparing these catalysts.

There is provided an organic electronic device that can exhibit a long lifetime while having a facilitated production process. An organic electronic device and a method for producing it, wherein the organic electronic device comprises two or more electrodes facing each other on a substrate, and an organic functional layer that includes at least a hole injecting layer and/or a hole transporting layer situated between two electrodes, wherein the hole injecting layer and/or hole transporting layer is formed as a thin-film from a fluid material that comprises anionic metal oxide clusters that include at least one metal element selected from among elements of Group 5, Group 6 or Groups 8-10 of the Periodic Table, the metal oxide clusters being polyoxometalates, dissolved or uniformly dispersed or mixed in an aqueous solvent.

The invention belongs to an inorganic chemical synthesis method, and particularly relates to a synthesis method of a metal complex, i.e. polyoxometallate hybridized compound which can be taken as a photocatalyst. A metal organic-inorganic compound is synthesized by taking a Keggin monosubstituted heteropolyanion or reduced heteropolyanion as a catalytically active substance and taking a transition metal complex as a fixed framework at certain temperature and under certain pH condition in an enclosed system. Due to the adoption of the prepared compound serving as a photocatalyst, the green decoloring rate of an industrial dye medium can reach 98 percent. The photocatalyst has slightly solubility in water, so that the photocatalyst can be separated conveniently and used repeatedly and has important meaning and potential application prospect during the treatment of industrial dye waste water.

The invention discloses a flame retardation catalyst and a supported flame retardation catalyst composed of same. The flame retardation catalyst has a structural formula of (A)nB, wherein A<+> is an imidazoliumcation, a quaternary ammonium cation, a quaternary phosphoniumcation, a pyrrolidoniumcation, a pyrazoliumcation or a pyridyliumcation, and B<n-> is a polyoxometallate anion. The supported flame retardation catalyst is composed of the flame retardation catalyst and clay as a supported, and the load capacity of the flame retardation catalyst is 1-50 wt% of clay. The supported flame retardation catalyst has good compatibility with polymer matrixes, helps to improve char yield and flame retardation performance of a flame retardation polymer system, and has the advantages of good thermostability and migration resistance, being friendly to environment and the like. By employing clay to support the flame retardation catalyst, the flame retardation catalyst can be uniformly dispersed in the polymer, and the char yield is improved. By employing an immersion method and without complex reaction steps, the preparation method is economical, simple, low in cost and easy to popularize.

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.

Polyoxometalate compounds which exhibit anti-retroviral activity are disclosed. Compounds with anti-retroviral activity include those having the following general molecular formulas:

M₇PW₁₁O₃₉

M₈SiW₁₁O₃₉

M₉HSiW₉O₃₄

M₈HPW₉O₃₄

M₁₀(TM)₄(PW₉O₃₄)₂

M₁₆(TM)₄(P₂W₁₅O₅₆)₂

M₁₄[NaP₅W₃₀O₁₁₀]

M₁₂(TM)₃(PW₉O₃₄)₂

M₆P₂W₁₈O₆₂

• [0001]
  • wherein M is an alkali metal, NH₄⁺ or other common monocation or soluble dication, or any combination of the above provided adequate water solubility is exhibited, or histidinium ion, argininium ion, or lysinium ion or any dication of a dipeptide or oligopeptide with 2 protonated basic amino acid residues, or any combination of these monocations or dications with each other or with any common inorganic cation, and
  [0002]
  • TM is a divalent transition metal ion, such as Mn, Fe, Co, Ni, Cu and Zn.

The invention relates to a preparation method of a polyoxometallate-polymer hybridized segmented copolymer nanotube, which comprises the steps of: (1) mixing a polyoxometallate-polymer hybridized segmented copolymer as a base material of the nanotube with N,N-dimethylformamide as a solvent to prepare a solution, and then adding strong-acid cation exchange resin to obtain a precursor solution; and (2) annealing the precursor solution at constant temperature of 70 DEG C for 24h, then annealing at constant temperature of 25 DEG C for 21 days to prepare the polyoxometallate-polymer hybridized segmented copolymer nanotube. The nanotube has a nuclear-shell structure with a polyoxometallate nanotube as a nuclear and polystyrene as a shell, and has the advantages of regular structure and good thermodynamic stability; and the preparation method has the advantages of simple process, easy operation, low cost and good repeatability. The nanotube has wide application values when being used as an ion channel on the aspects of a proton exchange of a fuel cell, and the like.

The invention belongs to the preparation technology of chemical material, and particularly relates to a method for preparing a polyoxometallate composite mesoporous material by electrostatic spinning. The method comprises the following steps of: dissolving a surfactant in a volatile polar organic solvent; adding a polyoxometallate and high polymer material; and with metal/non-metal salt as a mesoporous fiber framework material, preparing the polyoxometallate composite mesoporous material by high-voltage electrostatic spinning equipment. Compared with the traditional method for preparing polyoxometallate composite mesoporous material by hydrothermal synthesis, the method provided by the invention is simple, quick, safe and convenient to operate, and has good repeatability and good generality. A relatively expensive surface functionalization modification reagent is not needed, and the diameter of the composite mesoporous fiber can be effectively controlled by simply regulating the diameter of a nozzle so as to effectively control the external surface area of the material; and the prepared polyacid composite mesoporous fiber can be in any length.

An ordered mesoporous polyoxometallate-titanium dioxide composite and a preparation method belong to the chemical industry field. The composite comprises the following formula: H3PW12O40/TiO2. The preparation method combines such technologies as sol-gel chemistry, template self-assembly and programmed temperature hydrothermal treatment, etc. The method takes H3PW12O40 as an inorganic former body, a mixture of purity titanium tetraisopropoxide (TTIP) and titanium tetrachloride (TiCl4) as a titanium source and a nonionic surfactant (Pluronic P123) with structure of HO (CH2CH2O)20(CH2CH(CH3)O)70(CH2CH2O)20H) as a structure-guiding agent. The improvement effect of the catalytic property of the composite is very obvious and the life of the catalyst is prolonged.

The invention Belonging to the technical field of graphene oxide loaded photocatalysts, in order to solve the defects of easy aggregation, solubility in water, difficult separation and recovery and the like in phthalocyanine and polyoxometallate serving as a photocatalyst, the invention provides a graphene oxide covalently immobilized metal phthalocyanine catalyst, a preparation method and application thereof. Phthalocyanine and a derivative thereof are covalently bonded to modified graphene oxide to obtain a binary composite catalyst GO/Pc or GO/MPc; or phthalocyanine and a derivative as wellas polyoxometallate POM are loaded to modified graphene oxide together so as to obtain graphene oxide loaded phthalocyanine and POM ternary composite catalyst POM/GO/Pc or POM/GO/MPc. The method is conducive to separation and recovery of the catalyst, and at the same time avoids the easy aggregation defect of phthalocyanine. The graphene oxide covalently immobilized metal phthalocyanine catalystalso has a large specific surface area, expands the light response range, realizes the high catalytic activity of the composite ternary catalytic system under visible light, greatly improves the photoelectron-hole separation, and improves the photocatalytic activity.

The present invention relates to a process for the preparation of aromatic carbonyl compound with carbonyl group attached to its aromatic ring, particularly relates to a process for the preparation of aromatic carbonyl compound with carbonyl group attached to its aromatic ring, by oxidizing with molecular oxygen the methylene or alcoholic group attached to aromatic ring of an aromatic compound, using a polyoxometallate(s) anion exchanged hydrotalcite catalyst.

The invention belongs to the technical field of chemical materials and relates to a crystalline catalysis material for reaction of preparing dimethyl ether from methanol by dehydration and a preparation method thereof. In the crystalline catalysis material, a porous metal organic frame constructed by copper and trimesic acid is taken as a carrier to support Keggin type polyoxometallate. The method for preparing the crystalline catalysis material comprises the steps of: mixing the Keggin type polyoxometallate, trimesic acid, copper salt, ammonium salt and water in a certain molar ratio, and obtaining a crystal under the hydrothermal self-generated pressure; performing reflux on the obtained crystal in alcohol or performing ion exchange on the obtained crystal in aqueous solution of acid, and performing heat treatment on the crystal under the vacuum condition to obtain the material. The crystalline catalysis material has the advantages of low reaction temperature, high water resistance, simple preparation method, low cost, no corrosion or pollution, and suitability for industrial production.

The invention discloses a preparation method of a Cu, Fe-doped vacancy Keggin type silicon tungsten polyoxometallate catalyst. According to the invention, Cu and/or Fe salt with the molar ratio of 0.1-0.4 are/is added into Na10[alpha-SiW9O34].18H2O, K8[gamma-SiW10O36].10H2O and K8[beta2-SiW11O39].14H2O polyoxometallate precursors, full mixing, dissolution and evaporation for dryness are sequentially performed, and finally, calcining is performed at the temperature of 300-400 DEG C, so that the catalyst can be obtained. The preparation method is simple, low in cost, moderate in reaction condition and high in recovery rate; the raw materials are easy to get; when the catalyst is used for preparing benzaldehyde through catalytic oxidation of phenylcarbinol and 30% H2O2 is used as the oxidizing agent, the conversion rate can reach 87.1-96.9%, and the productive rate can reach 85.3-96.1%.

The invention innovatively relates to a novel polyoxometallate polymer obtained by directly polymerizing norbornylene functional polyoxometallate monomers by adopting an ROMP (Ring Opening Metathesis Polymerization) method, and measures the molecular weight distribution of the novel polyoxometallate polymer. The method disclosed by the invention is simple, convenient, fast, efficient and controllable, can obtain the target polymers at high yield within several hours through polymerization reaction in an open system, is simple in post processing, can be used for accurately controlling the molecular weight and easy to realize the industrialization; and the novel polyoxometallate polymer retains the excellent property of inorganic polyoxometallate and has potential application value on the aspects of catalysis, materials, medicines, and the like.

The invention provides semi-hemicyanine derivatives with photoelectrochemistry activity and a self-assembly polyoxometallate film, which relate to the preparation method and the photoelectrochemistry activity evaluation of the semi-hemicyanine derivatives and the self-assembly polyoxometallate film. The film comprises (E)-1,1'-(Hexane-1,6-diyl) bis (4-(4-dimethylamino) styryl) pyridinium) bromide and K7 [BW11O39M(H2O)], wherein M is Co, Ni, Zn, Cu and Cd, and the film is prepared through a static layer-by-layer self-assembly method. Under the irradiation of white light (730nm> lambda>325nm) with applied bias voltage being minus 0.3V (vs SCE) and light intensity being 100mW/cm<2>, the film can generate light current of 1.050mu A to 1.482mu A, thus the film has a potential application prospect in the aspect of solar cells.

The invention provides a polyacid-based pure inorganic multi-color electrochromic film. A preparing method of the electrochromic film includes the steps that (1) polyoxometallate is prepared into an aqueous solution A, the pH value of the solution is adjusted to be 2 through hydrochloric acid; (2) the commercial P25 powder TiO2 is prepared into sizing agents B capable of being used for silk-screen printing; (3) silk-screen printing is conducted on a conductive substrate through the sizing agents B so that a TiO2 thin layer can be printed on the surface of the conductive substrate; (4) the conductive substrate with the TiO2 thin layer is placed into the aqueous solution A, and electro-deposition is conducted; (5) the conductive substrate generated after the electro-deposition is conducted is taken out, cleaned through deionized water and ethyl alcohol, and dried through hot air. The hydrosolvent is adopted during the whole preparation process, and the method is environmentally friendly, free of harm to the environment and easy and convenient to operate. The prepared electrochromic film has good optical contrast and multi-color electrochromic performance, and a system for making an electrochromic display is provided.

An object of the present invention is to provide: a color material dispersion liquid which is able to form a coating film with high luminance, excellent heat resistance and excellent light resistance; a color resin composition for color filters, which is able to form a color layer with high luminance, excellent heat resistance and excellent light resistance; a color filter formed with the color resin composition for color filters; a liquid crystal display device having the color filter; and an organic light-emitting display device having the color filter. Disclosed is a color material dispersion liquid comprising a color material represented by the following general formula (I), a dispersant, and a solvent having a solubility of the color material of 0.1 (mg/10 g solvent) or less at 23° C., wherein molybdenum and tungsten are contained in a polyoxometalate anion in the color material, and a molar ratio between the molybdenum and the tungsten is 0.4:99.6 to 15:85:

(Symbols shown in the general formula (I) are described in the Description.)