Abstract: Provided are a porous silicon carbide nanocomposite structure comprising nanowires that are self-formed, a preparation method thereof, and a catalyst comprising the same, in which the catalyst with excellent activity may be prepared by uniformly supporting a catalytically active component in meso-macro pores and nanowires.

Abstract: Disclosed are catalysts comprised of platinum and gold. The catalysts are generally useful for the selective oxidation of compositions comprised of a primary alcohol group and at least one secondary alcohol group wherein at least the primary alcohol group is converted to a carboxyl group. More particularly, the catalysts are supported catalysts including particles comprising gold and particles comprising platinum, wherein the molar ratio of platinum to gold is in the range of about 100:1 to about 1:4, the platinum is essentially present as Pt(0) and the platinum-containing particles are of a size in the range of about 2 to about 50 nm. Also disclosed are methods for the oxidative chemocatalytic conversion of carbohydrates to carboxylic acids or derivatives thereof. Additionally, methods are disclosed for the selective oxidation of glucose to glucaric acid or derivatives thereof using catalysts comprising platinum and gold. Further, methods are disclosed for the production of such catalysts.

Abstract: The object of the present invention is a composition comprising shellac and/or a salt thereof and sodium starch glycolate and at least one physiologically acceptable excipient and a process for obtaining it.

Abstract: A hydrotreating catalyst includes a hydrogenation active metal supported on a alumina-phosphorus support and satisfies: a specific surface area being 100 m2/g or more; a total pore volume measured by mercury intrusion being in a range 0.80-1.50 ml/g; a maximum value of pore distribution being present in a pore diameter range 10-30 nm; a ratio of a pore volume of pores with a pore diameter within a range of ±2 nm of a pore diameter at the maximum value to a pore volume of pores with a pore diameter in a range 5-100 nm being 0.40 or less; a pressure capacity being 10 N/mm or more; 0.4-10.0 mass % of phosphorus being contained in the catalyst in terms of P2O5 concentration based on a total amount of the catalyst; and a hydrogenation active metal being at least one metal selected from metals of VIA and VIII groups of the periodic table.

Abstract: Disclosed are a ferrite catalyst and preparation methods thereof. The catalyst is provided with a formula below, wherein A is Mg atom, Zn atom or a mixture of both atoms at any ratio; D is one or more atoms selected from the group consisting of Ni, Co, W, Mn, Ca, Mo or V atom; Z is a catalyst carrier, which is one or more selected from the group consisting of calcium phosphate, calcium dihydrogen phosphate, aluminum phosphate, aluminum dihydrogen phosphate, ferric phosphate, magnesium phosphate, zinc phosphate, Mg—Al hydrotalcite, calcium carbonate, magnesium carbonate; a=0.01-0.6; b=0-0.30; c is a number balancing each valence; x, y represent the amounts of principal catalyst and carrier Z respectively, wherein the weight ratio y/x=0.5:1-7:1.

Abstract: A group 13 nitride crystal having a hexagonal crystal structure and containing at least a nitrogen atom and at least a metal atom selected from a group consisting of B, Al, Ga, In, and Tl. The group 13 nitride crystal includes a first region disposed on an inner side in a cross section intersecting c-axis, a third region disposed on an outermost side in the cross section and having a crystal property different from that of the first region, and a second region disposed at least partially between the first region and the third region in the cross section, the second region being a transition region of a crystal growth and having a crystal property different from that of the first region and that of the third region.

Abstract: A method of synthesizing anatase TiO2 nanosheets, the method comprising the steps of: (a) mixing a titanium complex with an ethanolamine derivative; (b) adding water to form a mixture; and (c) heating the mixture at a temperature ranging from about 150° C. to about 200° C. to obtain anatase TiO2 nanosheets having O-terminated {100} facets.

Abstract: A process is described for the preparation of an inorganic material with a hierarchical porosity in the micropore and mesopore domains. The material has at least two elementary spherical particles having a maximum diameter of 200 microns. The process comprises: a) preparing a solution containing zeolitic nanocrystals with a maximum nanometric dimension equal to 60 nm based on silicon and/or precursor elements of proto-zeolitic entities based on silicon; b) mixing, in solution, metallic particles or at least one metallic precursor of metallic particles, a surfactant and the solution obtained in accordance with a) such that the ratio of the volumes of inorganic and organic materials, Vinorganic/Vorganic, is 0.29 to 0.50; c) aerosol atomization of the solution obtained in b) resulting in formation of spherical particles; d) drying the particles; g) eliminating any remaining precursor elements of proto-zeolitic entities based on silicon and the surfactant.

Abstract: A method for the preparation of a modified catalyst support comprising: (a) treating a bare catalyst support material with an aqueous solution or dispersion of one or more titanium metal sources and one or more carboxylic acids; and (b) drying the treated support, and (c) optionally calcining the treated support. Also provided are catalyst support materials obtainable by the methods, and catalysts prepared from such supports.

Abstract: The method of storing exfoliated nanoclay particles involves the freezing of exfoliated nanoclay particles in water, thus forming ice with the exfoliated nanoclay particles suspended therein. The frozen state of the suspension prevents the exfoliated nanoclay particles from agglomerating, thus allowing the nanoclay particles to be stored and transported while maintaining their exfoliated state. The exfoliated nanoclay particles are added to the water to form a suspension, and the suspension is then mixed for between 24 and 72 hours to ensure that no agglomerated nanoclay particles are in suspension and that the suspension contains only exfoliated nanoclay particles. The suspension is then frozen to store the exfoliated nanoclay particles in ice.

Abstract: Presented herein is a method for obtaining a dissolved selenium liquid mixture from solid selenium. The method involves mixing an amine solvent and a thiol solvent with the solid selenium to produce a liquid intermediate solution and removing a sulfur containing compound from the liquid intermediate solution to produce a dissolved selenium liquid mixture. A method for obtaining dissolved sulfur liquid mixture by mixing an amine with a thiol to produce a liquid solution that dissolves sulfur to produce a dissolved sulfur liquid mixture is also presented. In addition, a method for obtaining a dissolved sulfur and selenium liquid mixture from solid selenium and solid sulfur by mixing an amine solvent with a thiol solvent is presented.

Abstract: A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce3+/Ce4+, in which the ratio of Ce3+/(Ce3++Ce4+) in the lattice ranges from 40% to 90% at 20° C. The valence states Ce3+ and Ce4+ are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450° C.

Abstract: The present invention relates to a belt-shaped metal nanostructure in which a wide surface area of catalytically active material can be realized even by a relatively small amount thereof so that it shows an excellent catalytic activity, and a method for preparing same.

Abstract: In at least one embodiment, an oxygen reduction reaction catalyst (ORR) and a method for making the catalyst are provided. The method may include depositing a metal oxide on a graphitized carbon or graphene substrate. A platinum catalyst may then be deposited over the metal oxide to provide an ORR catalyst for use in, for example, a PEMFC. The metal oxide may be niobium oxide and may have an amorphous structure. The platinum catalyst may form a thin, electrically interconnected network structure overlaying the metal oxide. The ORR catalyst may be prepared by alternating the deposition of the metal oxide and the platinum catalyst, for example, using physical vapor deposition. The ORR catalyst may have a specific activity of at least 1,000 ?A/cm2 Pt and may approach or achieve bulk Pt activity.

Abstract: The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction between a dicarboxylic acid or an ester-forming derivative thereof and a glycol, wherein the polycondensation catalyst comprises particles of a solid base having on the surfaces an inner coating layer of titanic acid in an amount of from 0.1 to 50 parts by weight in terms of TiO2 per 100 parts by weight of the solid base, and an outer coating layer either of an oxide of at least one element selected from aluminum, zirconium and silicon, or of a composite oxide of at least two elements selected from aluminum, zirconium and silicon on the surface of the inner coating layer in an amount of from 1 to 50 parts by weight per 100 parts by weight of the solid base.

Abstract: Graphene particulates, especially graphene nanoribbons (GNRs) and graphene quantum dots (GQDs), and a high-throughput process for the production of such particulates is provided. The graphene particulates are produced by a nanotomy process in which graphene blocks are cut from a source of graphite and then exfoliated into a plurality of graphene particulates. Graphene particulates having narrow widths, on the order of 100 nm or less, can be produced having band gap properties suitable for use in a variety of electrical applications.

Abstract: A catalyst usable in hydrotreatment processes: an alumina-based amorphous support, phosphorus, a C1-C4 dialkyl succinate, acetic acid and a hydro-dehydrogenizing function of at least one group VIII element and at least one group VIB element, preferably made up of cobalt and molybdenum, a catalyst whose Raman spectrum comprises the most intense bands characteristic of the Keggin heteropolyanions (974 and/or 990 cm?1), C1-C4 dialkyl succinate and acetic acid (896 cm?1). Preferably, the dialkyl succinate concerned is dimethyl succinate and its main band is at 853 cm?1.

Abstract: An iodine adsorbent of an embodiment includes: a carrier modified with a functional group represented by a formula (1); and a silver ion supported on the carrier, where R1 is a polyol group.

Abstract: There is provided manganese oxide having a pore volume fraction of no greater than 20% for pores with diameters of 10 ?m or greater, as measured by mercury porosimetry, and a tap density of 1.6 g/cm3 or greater, and a method for producing it. There is also provided a method for producing a lithium manganese composite oxide using the manganese oxide.

Abstract: A water-resistant calcium sulphate based body comprises a matrix of crystalline calcium sulphate anhydrite, crystals of the matrix being connected to one another by water-resistant phosphate bonding zones, optionally also containing aluminum. The body can be produced by impregnating a porous calcium sulphate with a source of phosphate ions (optionally containing aluminum), and then calcining. Alternatively, a paste comprising calcium sulphate and a source of phosphate ions (optionally containing aluminum) is heated or compressed to form a ‘green body’ and then calcined to produce the body.