Abstract: The invention relates to a method for the treatment of a composition containing inorganic silanes and at least one foreign metal and/or a compound containing a foreign metal, wherein the composition is brought in contact with at least one adsorption agent, and for obtaining the composition, in which the content of foreign metal and/or of a compound containing a foreign metal is reduced, and to a corresponding composition having a reduced foreign metal content, and further to the use of organic resins, activated carbons, silicates, and/or zeolites for the reduction of foreign metals and/or compounds containing foreign metals in compositions of inorganic silanes.

Abstract: A material comprising a plurality of nanoparticles. Each of the plurality of nanoparticles includes at least one of a metal phosphate, a metal silicate, a metal oxide, a metal borate, a metal aluminate, and combinations thereof. The plurality of nanoparticles is substantially monodisperse. Also disclosed is a method of making a plurality of substantially monodisperse nanoparticles. The method includes providing a slurry of at least one metal precursor, maintaining the pH of the slurry at a predetermined value, mechanically milling the slurry, drying the slurry to form a powder; and calcining the powder at a predetermined temperature to form the plurality of nanoparticles.

Abstract: Provided is an oxide film including an Si component, in which a relative intensity ratio B/A of an absorption peak intensity B at a wavenumber of 1,000 to 850 cm?1 assigned to an Si—O-M bond where M represents H or a metal element to an absorption peak intensity A at a wavenumber of 1,200 to 1,000 cm?1 assigned to an Si—O bond in infrared absorption spectrum measurement of the film is 0.86 or more to 1.02 or less and an optical member using the oxide film are provided. The oxide film shows suppressed fluctuations in its characteristics even when left to stand under a high-temperature, high-humidity environment for a long time period; has significantly improved durability; and is stable over a long time period and an optical member using the oxide film.

Abstract: A method of making hydrogenated Group IVA compounds having reduced metal-based impurities, compositions and inks including such Group IVA compounds, and methods for forming a semiconductor thin film. Thin semiconducting films prepared according to the present invention generally exhibit improved conductivity, film morphology and/or carrier mobility relative to an otherwise identical structure made by an identical process, but without the washing step. In addition, the properties of the present thin film are generally more predictable than those of films produced from similarly prepared (cyclo)silanes that have not been washed according to the present invention.

Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery comprising an alloy including silicon and a transition metal selected from the group consisting of titanium, zirconium, vanadium, molybdenum, tungsten, iron, and nickel; and a silicon oxide film and an oxide film of the transition metal formed on a surface of the alloy wherein the alloy includes an A phase including silicon and a B phase including a crystalline alloy of silicon and the transition metal. The negative electrode material has a silicon oxide film and an oxide film of the transition metal on the surface of the alloy wherein the thickness ratio of the transition metal oxide film to the silicon oxide film is at least 0.44 and smaller than 1.

Abstract: There are provided a nickel oxide film for a bolometer and a manufacturing method thereof, and an infrared detector using the nickel oxide film. The nickel oxide film has properties with a TCR value greater than ?3%/° C., a low noise value, and stable and high reproducibility properties. The nickel oxide film is applicable to manufacturing an infrared detector using a nickel oxide film for a bolometer.

Abstract: A mesoporous silicate is prepared by a method that includes combining a silicate precursor, a bifunctional catalyst, and a structure-directing surfactant in an aqueous medium having a pH of about 4 to about 10. A mesoporous silicate forms as an aqueous suspension and can then be isolated. The mesoporous silicate can be formed under mild conditions of temperature and pH, and it exhibits a surprisingly high degree of network condensation.

Abstract: A method for manufacturing a BiMO particle (M is either one of Si, Ge, Ti, and Sn), in which at least one type of compound selected from the group consisting of a silicon compound, a germanium compound, a titanium compound, and a tin compound is reacted with a bismuth compound by agitating and mixing the compounds in an alkali water solution in the presence of an amino compound.

Abstract: Nanolayered layered silicate materials of octahedrally arranged units with divalent metal ions at centers of the units covalently linked above and below to tetrahedrally arranged oxygen and hydroxyl units with silicon atoms. The silicate materials contain silanol groups which are reactive to form derivative compositions useful for water purification to remove heavy meal cations.

Abstract: In various embodiments, the present disclosure provides a silicate material and a method for forming such material. According to a particular embodiment of the method, water is added to reactants including a metal salt, an oxidizer, a silicon source and a fuel source. The reactants and water are heated at a temperature between about 800° C. and about 1200° C. Heating initiates a combustion reaction and produces a nanocrystalline powder. In more particular examples of the method, the nanocrystalline powder is subsequently densified, such as by sintering. The material formed by the method is, in some cases, a lutetium-containing material suitable for use as a scintillator.

Abstract: A method of preparing channel-type mesoporous material with an elliptical pore section is described. An alkaline solution containing two surfactants different in the electronic properties of their hydrophilic groups is prepared. A silica precursor is added to form a stack of rod-like micelles each having an elliptical section with the silica precursor between the rod-like micelles. The silica precursor is reacted into a silica framework. The rod-like micelles are removed from the silica framework.

Abstract: A channel-type mesoporous material with an elliptical pore section has a 2D-rectangular pore arrangement. Besides, the channel-type mesoporous material includes silica and has a unit cell ratio a/b satisfying the inequality of ?{square root over (3)}<a/b?2.85. The synthesis procedure can be easily applied to prepare functional mesoporous silica materials, and examples given in this application are the syntheses of cyanoethyl-functionalized and mercaptopropyl-functionalized mesoporous materials with a c2mm symmetry. The mesoporous materials discussed herein have great potential for various advanced applications in the fields of catalysis, selective adsorption, controlled drug delivery and release, and many of other applications.

Abstract: Zinc silicon oxide particles with a core-shell structure which have a Zn/Si ratio of from 2 to 75, in atom %/atom %, whose fraction of Zn, Si and O is at least 99% by weight, based on the zinc silicon oxide particles, which have a BET surface area of from 10 to 60 m2/g, a weight-averaged primary particle diameter of from 10 to 75 nm an average aggregate area of less than 40 000 nm2 and an average aggregate diameter (ECD) of less than 200 nm, whose core is crystalline and consists of aggregated primary particles of zinc oxide and whose shell surrounds the aggregated zinc oxide primary particles and consists of one or more compounds containing the elements Si and O. Dispersion, coating composition and sunscreen formulation comprise the zinc silicon oxide particles.

Abstract: A Bi12XO20 powder, wherein X represents at least one kind of element selected from the group consisting of Si, Ge, and Ti, is produced by a process comprising: a step (A) of preparing a solution containing the Bi element and a solution containing the X element, a step (B) of feeding the solution containing the Bi element and the solution containing the X element into a mixing section, and preparing a mixed liquid in the mixing section, a step (C) of discharging the mixed liquid from the mixing section, and a step (D) of feeding the mixed liquid, which has been discharged from the mixing section, into a reaction section located at the exterior of the mixing section, and allowing the mixed liquid to undergo reaction in the reaction section. The steps (B) and (C) are performed in parallel.

Abstract: A Bi12XO20 powder, wherein X represents at least one kind of element selected from the group consisting of Si, Ge, and Ti, is produced by a process comprising: a step (A) of preparing a solution containing the Bi element and a solution containing the X element, a step (B) of adding the two kinds of the solutions to a mother liquor having been previously fed into a reaction chamber, a mixed liquid being thereby prepared, and a step (C) of raising a temperature of the mixed liquid from the temperature, at which the addition is begun. In the step (B), the addition of the two kinds of the solutions is performed such that the substance quantities of the Bi element and the X element in the mixed liquid increase in parallel from the time at which the addition is begun.

Abstract: A mesoporous silicate is prepared by a method that includes combining a silicate precursor, a bifunctional catalyst, and a structure-directing surfactant in an aqueous medium having a pH of about 4 to about 10. A mesoporous silicate forms as an aqueous suspension and can then be isolated. The mesoporous silicate can be formed under mild conditions of temperature and pH, and it exhibits a surprisingly high degree of network condensation.

Abstract: This invention relates to a process for preparing zirconium oxide, in its various forms, including zirconium-based mixed oxides. There is described a process for preparing a zirconium oxide in the absence of a cerium salt which comprises precipitating a zirconium hydroxide from an aqueous solution of a zirconium salt by reaction with an alkali in the presence of a controlled amount of sulphate anions at a temperature not greater than 50° C. and then calcining the hydroxide to form an oxide, wherein the oxide thus formed is essentially sulphate free. Catalysts and ceramics can be produced from the product oxides having improved thermal stability and improved sinterability, respectively. A particular use of the product oxide is as a promoter or catalyst support in automobile exhaust systems.

Abstract: Use of pyrogenic metal oxide for the manufacture of a selfcompacting composition comprising hydraulic binders and having high early strength, the composition comprising at least one hydraulic binder and water as further constituents and the product of the BET surface area, in m2/g, of the pyrogenic metal oxide and the proportion by weight of the pyrogenic metal oxide based on the hydraulic binder being 20 to 200 m2/100 g of hydraulic binder.

Abstract: The invention relates to a method for separating uranium(VI) from one or more actinides selected from actinides(IV) and actinides(VI) other than uranium(VI), characterized in that it comprises the following steps: a) bringing an organic phase, which is immiscible with water and contains the said uranium and the said actinide or actinides, in contact with an aqueous acidic solution containing at least one lacunary heteropolyanion and, if the said actinide or at least one of the said actinides is an actinide(VI), a reducing agent capable of selectively reducing this actinide(VI); and b) separating the said organic phase from the said aqueous solution. Applications: reprocessing irradiated nuclear fuels, processing rare-earth, thorium and/or uranium ores.

Abstract: Provided are a method of preparing a zinc silicate-based phosphor and a zinc silicate-based phosphor prepared using the method. The method includes: (a) preparing a solution including a Zn precursor compound and a Si precursor compound; (b) adding a coprecipitant to the solution to form precipitation; and (c) heat treating the solution in which the precipitation is formed to synthesize zinc silicate (Zn2SiO4), wherein a solvent of the solution including the Zn precursor compound and the Si precursor compound includes at least one selected from the group consisting of ethanol, methanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 1-pentanol, 2-pentanol, 3-pentanol, 1-hexanol, and 1-heptanol, and hydrazine is used as the coprecipitant.

Abstract: A method for the synthesis of compounds of the formula C—LixM1?yM?y(XO4)n, where C represents carbon cross-linked with the compound LixM1?yM?y(XO4)n, in which x, y and n are numbers such as 0?x?2, 0?y?0.6, and 1?n?1.5, M is a transition metal or a mixture of transition metals from the first period of the periodic table, M? is an element with fixed valency selected among Mg2+, Ca2+, Al3+, Zn2+ or a combination of these same elements and X is chosen among S, P and Si, by bringing into equilibrium, in the required proportions, the mixture of precursors, with a gaseous atmosphere, the synthesis taking place by reaction and bringing into equilibrium, in the required proportions, the mixture of the precursors, the procedure comprising at least one pyrolysis step of the carbon source compound in such a way as to obtain a compound in which the electronic conductivity measured on a sample of powder compressed at a pressure of 3750 Kg·cm?2 is greater than 10?8 S·cm?1.

Abstract: It is aimed at providing an oxynitride powder, which is suitable for usage as a phosphor, is free from coloration due to contamination of impurities, and mainly includes a fine ?-sialon powder. An oxynitride powder is produced by applying a heat treatment in a reducing and nitriding atmosphere, to a precursor compound including at least constituent elements M, Si, Al, and O (where M is one element or mixed two or more elements selected from Li, Mg, Ca, Sr, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), thereby decreasing an oxygen content and increasing a nitrogen content of the precursor.

Abstract: The invention relates to a process for preparing a silicate of an element chosen from alkali metals, alkaline-earth metals or rare earths, comprising a reaction between silica and a sulfate of said element in a reactor equipped with at least one submerged burner within a molten mass, said submerged burner being fed with a gas containing oxygen, an excess of fuel/reducing agent being introduced into the reactor relative to the oxygen effectively consumed. The process allows the reaction to be carried out satisfactorily and at relatively low temperature.

Abstract: An alkaline solution of an alkali-soluble compound, which is selected from the group consisting of an alkali-soluble silicon compound and an alkali-soluble germanium compound, is prepared. Also, a water-soluble bismuth compound solution is prepared. The alkaline solution and the water-soluble bismuth compound solution are subjected to mixing processing with agitation at a temperature of at least 80° C. by use of a shearing type agitator and are thereby allowed to react with each other. Thus Bi12MO20 particles, in which M represents an element selected from the group consisting of Si and Ge, are produced. The produced Bi12MO20 particles have small particle diameters and uniform composition.

Abstract: A pillar-shaped honeycomb structure has a plurality of cells longitudinally placed in parallel with one another with a wall portion therebetween, wherein the honeycomb structure mainly includes inorganic fibers which form the honeycomb structure without lamination interfaces.

Abstract: Disclosed may be a phase change material alloy, a phase change memory device including the same, and methods of manufacturing and operating the phase change memory device. The phase change material alloy may include Si and Sb. The alloy may be a Si—O—Sb alloy further including O. The Si—O—Sb alloy may be SixOySbz, wherein, when x/(x+z) may be x1, 0.05?x1?0.30, 0.00?y?0.50, and x+y+z may be 1. The Si—O—Sb alloy may further comprise an element other than Si, O, and Sb.

Abstract: A supported catalyst comprising a support having supported thereon at least one member selected from the group consisting of heteropolyacids and heteropolyacid salts, in which the heteropolyacid and/or heteropolyacid salt is substantially present in a surface layer region of the support to a depth of 30% from the support surface. The catalyst has a high performance when used for the production of compounds by various reactions.

Abstract: A carbon dioxide gas absorbent includes a porous body containing a lithium complex oxide. The porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 ?m and second pores with a diameter larger than 100 ?m and 500 ?m or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 ?m occupy 0 to 10% and fourth pores with a diameter larger than 500 ?m occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%.

Abstract: The present invention discloses a method for fabricating aerogels, a method for fabricating surface-modified aerogels, and a method for fabricating biocomposites. Take the fabricating method of biocomposites for example, first, a precursor solution is provided and the precursor solution comprises a hydrophilic ionic liquid, a catalyzed hydrolysis and/or condensation reagent, at least one biomolecule. Next, a curing process is performed for the precursor solution to hydrolyze and polymerize the at least one alkoxide monomer and/or aryloxide monomer to wrap at least one biomolecule and thus form biocomposite. Afterwards, an extracting process is performed by a solvent for the biocomposite to substitute the ionic liquid in the biocomposite. Finally, a drying process for the biocomposite is carried out after the extracting process so as to remove the solvent in the biocomposite. Therefore, the biocomposite is formed.

Abstract: A process is disclosed for preparing a zinc-containing molecular sieve having IFR framework topology and having zinc atoms in its crystal framework, said process comprising: (a) preparing an aqueous mixture containing sources of silicon oxide, zinc oxide, an alkali metal, and an N-benzyl-1,4-diazabicyclo[2.2.2]octane cation having an anionic counterion which is not detrimental to the formation of the molecular sieve; and (b) maintaining the aqueous mixture under conditions sufficient to form crystals of the molecular sieve.

Abstract: Disclosed are organometallic compounds derived from Groups VIIb, VIII, IX, and X metals useful as precursors for the formation of metal containing powders and for the chemical deposition of the metals on substrates, particularly for the chemical vapor deposition of metal films suitable for the manufacture of electronic devices. Methods for their use are also disclosed.

Abstract: An external gelation process is described which produces granules of metal hydride particles contained within a sol-gel matrix. The resulting granules are dimensionally stable and are useful for applications such as hydrogen separation and hydrogen purification. An additional coating technique for strengthening the granules is also provided.

Abstract: The present invention provides a solid electrolyte with high ion-conductivity which is cheap and exhibits high conductivity in an alkaline form, and stably keeps high conductivity because of a small amount of the leak of a compound bearing conductivity even in a wet state. The invention is useful in an electrochemical system using the solid electrolyte, such as a fuel cell. The solid electrolyte with high ion-conductivity comprises a hybrid compound which contains at least polyvinyl alcohol and a zirconic acid compound, and also a nitrogen-containing organic compound having a structure of amine, quaternary ammonium compound and/or imine, obtained by hydrolyzing a zirconium salt or an oxyzirconium salt in a solution including water, polyvinyl alcohol, a zirconium salt or an oxyzirconium salt and a nitrogen-containing organic compound having a structure of amine, quaternary ammonium compound and/or imine coexist, removing a solvent and contacting with alkali.

Abstract: A substance includes an oxide including at least one element selected from the group including cobalt Co, nickel Ni, manganese Mn, iron Fe, and copper Cu; and silicon Si chemically bonded to the surface of the oxide. Also, a battery includes a cathode, an anode, and an electrolyte, wherein the cathode includes an oxide including at least one selected from the group including cobalt Co, nickel Ni, manganese Mn, iron Fe, and copper Cu; and a substance including silicon Si chemically bonded to the surface of the oxide.

Abstract: The present invention is directed to a new crystalline molecular sieve designated SSZ-82, a method for preparing SSZ-82 using a 1,6-bis(N-cyclohexylpyrrolidinium)hexane dication as a structure directing agent, and uses for SSZ-82.

Abstract: A method of making hydrogenated Group IVA compounds having reduced metal-based impurities, compositions and inks including such Group IVA compounds, and methods for forming a semiconductor thin film. Thin semiconducting films prepared according to the present invention generally exhibit improved conductivity, film morphology and/or carrier mobility relative to an otherwise identical structure made by an identical process, but without the washing step. In addition, the properties of the present thin film are generally more predictable than those of films produced from similarly prepared (cyclo)silanes that have not been washed according to the present invention.

Abstract: The invention relates to a process for the incorporation of nanophosphors (phosphors) into micro-optical structures, and to corresponding illuminants. In this impregnation process, a micro-optical system comprising inverse opal powders is filled with a dispersion of a nanophosphor.

Abstract: To provide a bleaching activator capable of improving bleaching performance of a peroxy compound and the like, and a detergent composition comprising such a compound. A bleaching activator comprising Keggin heteropolyoxometalate anions, wherein the Keggin heteropolyoxometalate anions comprise a Keggin heteropolyoxometalate anion represented by the following formula (1): [XMa(H2O)bOc]d???(1) (in the formula, X representing a silicon atom or a phosphorus atom; M being the same or different and representing a tungsten atom or a molybdenum atom; a representing an integer of 9 to 11; b representing a positive number of 0 to 6; c representing a positive number of 28 to 39; d representing a valency and being a positive number).

Abstract: Provided is a phosphor material for a white LED with a blue LED or ultraviolet LED as a light source. A phosphor comprises an ?-sialon represented by the formula: (M1)X(M2)Y(Si)12?(m+n)(Al)m+n(O)n(N)16?n where M1 is at least one element selected from the group consisting of Li, Mg, Ca, Y and lanthanide metals (except for La and Ce), M2 is at least one element selected from Ce, Pr, Eu, Tb, Yb and Er, 0.3?X+Y?1.5, 0<Y?0.7, 0.6?m?3.0, 0?n?1.5 and X+Y=m/2; and the oxygen content in a powder of the ?-sialon is at most 0.4 mass % larger than a value calculated based on the formula.

Abstract: Photoinitiator modified silicate and ethylenically unsaturated monomer are reacted in solvent to cause living polymerization of monomer and exfoliation of silicate layers and cause attachment of silicate layers to polymer chains, thereby providing dispersed homopolymer or block copolymer silicate nanocomposites.

Abstract: A catalytic material includes microporous zeolites supported on a mesoporous inorganic oxide support. The microporous zeolite can include zeolite Beta, zeolite Y (including “ultra stable Y”—USY), mordenite, Zeolite L, ZSM-5, ZSM-11, ZSM-12, ZSM-20, Theta-1, ZSM-23, ZSM-34, ZSM-35, ZSM-48, SSZ-32, PSH-3, MCM-22, MCM-49, MCM-56, ITQ-1, ITQ-2, ITQ-4, ITQ-21, SAPO-5, SAPO-11, SAPO-37, Breck-6, ALPO4-5, etc. The mesoporous inorganic oxide can be e.g., silica or silicate. The catalytic material can be further modified by introducing some metals e.g. aluminum, titanium, molybdenum, nickel, cobalt, iron, tungsten, palladium and platinum. It can be used as catalysts for acylation, alkylation, dimerization, oligomerization, polymerization, hydrogenation, dehydrogenation, aromatization, isomerization, hydrotreating, catalytic cracking and hydrocracking reactions.

Abstract: A composite oxide catalyst for the oxidation of an olefin containing Mo and Bi as essential components, characterized in that it has a specific surface area of 5 to 25 m2/g and a pore volume of 0.2 to 0.7 cc/g, and has a pore diameter distribution wherein the volume of the pores having a pore diameter of 0.03 to 0.1 ?m accounts for 30% or more of the total pore volume, the volume of the pores having a pore diameter of 0.1 to 1 ?m accounts for 20% or more of the total pore volume, and the volume of the pores having a pore diameter of less than 0.

Abstract: Nanolayered layered silicate materials of octahedrally arranged units with divalent metal ions at centers of the units covalently linked above and below to tetrahedrally arranged oxygen and hydroxyl units with silicon atoms. The silicate materials contain silanol groups which are reactive to form derivative compositions useful for water purification to remove heavy meal cations.

Abstract: A silicon oxide powder can be continuously prepared by feeding a raw material powder mixture containing silicon dioxide powder into a reaction chamber (2) at a temperature of 1,100-1,600° C., to produce a silicon oxide gas, transferring the silicon oxide gas to a deposition chamber (11) through a transfer conduit (10) maintained at a temperature of from higher than 1,000° C. to 1,300° C., causing silicon oxide to deposit on a substrate (13) which is disposed and cooled in the deposition chamber, scraping the silicon oxide deposit, and recovering the deposit in a recovery chamber (18). The method and apparatus is capable of continuous and stable production of amorphous silicon oxide powder of high purity.

Abstract: A process for the preparation of a nanoparticulate carbon dioxide acceptor. The acceptor is a mixed metal oxide having at least two metal ions X and Y. The process includes contacting in solution a precursor of an oxide of metal ion X and a precursor of an oxide of metal ion Y; drying said solution to form an amorphous solid; and calcining the amorphous solid to form the acceptor.

Abstract: A fluorescent substance comprising a plurality of particles of ZnxSiO4:Mny (1.4?x<2.0, 0<y?0.3), wherein a half-band width in a profile of “charge amount vs. number distribution” of the particles measured by a charge amount distribution analyzer is 0.5-2.0 (fC/10 ?m).

Abstract: Silicon-titanium mixed oxide powder produced by flame hydrolysis, which consists of aggregates of primary particles, with a BET surface area of 90±15 m2/g, a titanium dioxide proportion of 50±8 wt. % and an anatase/rutile ratio of 60:40 to 70:30. It is produced in that a mixture of silicon halide, titanium halide, hydrogen and primary air is ignited in a burner and the flame is burned into a reaction chamber closed off from the surrounding air, and secondary air and a gas, which increases the temperature in the reaction chamber by combustion and/or which slows down the cooling in the reaction chamber because of low heat transfer, are additionally introduced into the reaction chamber. It can be used in toner compositions.

Abstract: A zircon composition having a multi-modal particle size distribution is disclosed. The multi-modal zircon composition comprises greater than about 40 parts by weight of a coarse zircon component having a median particle size of from greater than about 3 ?m to about 25 ?m, and less than about 60 parts by weight of a fine zircon component having a median particle size of 3 ?m or less. Methods for manufacturing a green body and a fired refractory ceramic body comprising the multi-modal zircon composition are also disclosed.

Abstract: The invention relates to a method or producing a catalytically active tectosilicate-based mineral consisting in treating the tectosilicate with a metal salt solution and in drying it. The invention is characterized in that the dried tectosilicate is treated in the form of hydrogen with a copper-based metal salt during a solid state ion exchange.

Abstract: The invention concerns the selective oxidation of propane into acrylic acid using highly selective catalysts and relates more particularly to a process for preparing these improved catalysts and their use for the production of acrylic acid from propane. The improved catalysts having the formula: Mo1Va(Te and/or Sb)b(Nb and/or Ta)cSidOx wherein a is between 0.006 and 1, b is between 0.006 and 1, c is between 0.001 and 0.5, d is between 0 and 3.5, and x is dependant on the oxidation state of the other elements, are obtained by adding a doping agent constituted by at least one component selected from Nb and Ta to a mainly orthorhombic phase prepared by hydrothermal method of a Mo—V—(Te and/or Sb)—O mixed metal oxide, optionally containing Nb and/or Ta and/or Si.