The invention provides a process for treating waste water from an industrial process for producing propylene oxide, which process comprises subjecting the waste water to a catalytic wet oxidation treatment in the presence of a catalyst comprising metal nanoparticles-doped porous carbon beads.

An object of the present invention is to provide means for improving the hydrogen generation properties of a hydrogen-producing catalyst. A hydrogen-producing catalyst according to one aspect of the present invention comprises Rh and a composite containing Al, Ce, and Zr. When a ratio of the number of Al atoms to the number of Ce atoms (Al/Ce) in the composite measured by X-ray fluorescence (XRF) analysis is R.sub.I and a ratio of the number of Al atoms to the number of Ce atoms (Al/Ce,) in the composite measured by an Xray photoelectron spectroscopy (XPS) method is R.sub.2, a value of R.sub.2-R.sub.1 is greater than 2.25 and less than 5.92.

The invention relates to a molecular sieve composition, a process of preparing same and use thereof in the production of lower olefins. The molecular sieve composition comprises an aluminophosphate molecular sieve and a CO adsorbing component, both of which are present independently of each other. When the molecular sieve composition is used as a catalyst for producing lower olefins using synthesis gas as a raw material, the molecular sieve composition has the advantages of high selectivity to lower olefins and the like.

The invention relates to a method of preparing titanium dioxide-coated nanostars. Titanium precursors are hydrolyzed into crystalline TiO.sub.2 polymorphs at low temperatures, allowing the delicate morphology of the nanostars to be preserved while maintaining their desirable photocatalytic properties.

A mesoporous metal doped cerium oxide catalyst is provided. The catalyst can contain nanotextured cerium oxide (CeO.sub.2) which can be utilized for hydrogen production or reformate gas purification in a water gas shift reaction. The catalyst may be advantageously used to remove CO from a gas containing CO. The catalyst may also be incorporated into a fuel processor.

The synthesis of silver nanoparticles (AgNPs)/meso-porous silicon (PSi) nanocomposite and its effective use as efficient chemical sensor and photocatalyst are described. The PSi was prepared via a simple stain etching of Si microparticles in HF/HNO.sub.3 aqueous solution, followed by the deposition of AgNPs onto stain etched PSi by the immersion plating technique. The resultant nanocomposite is used successfully for (i) enhanced electro-oxidation and quantification of ascorbic acid (AA) on modified glassy carbon electrode and (ii) for the photo-reduction of hexavalent chromium Cr(VI) to trivalent Cr(III) under direct visible light irradiation in the presence of citric acid.

This invention provides an anisotropic nanostructure represented by the formula: Ru.sub.xM.sub.1-x, wherein 0.6x0.999, and M represents at least one member selected from the group consisting of Ir, Rh, Pt, Pd, and Au, and wherein Ru and M form a solid solution at the atomic level, and the anisotropic nanostructure has an anisotropic hexagonal close-packed structure (hcp).

A method of producing a catalyst comprises generating an aerosolized flow of catalyst support particles, heating a catalytically active compound precursor to produce a catalytically active compound precursor vapor, contacting the aerosolized flow of catalyst support particles with the catalytically active compound precursor vapor, and condensing the catalytically active compound precursor onto the catalyst support particles to produce the catalyst comprising catalytically active compound deposited on surfaces of the catalyst support particles. The method may further comprise aerosolizing a catalyst support precursor mixture, drying the aerosolized catalyst support precursor mixture in a first heating zone to form an aerosolized flow of catalyst support particles, and contacting the catalyst support particles with a catalytically active compound precursor vapor in a second heating zone to form the catalyst comprising the layer of the catalytically active compound deposited on surfaces of the catalyst of catalyst support particles.

The present disclosure describes, inter alia, binary catalyst compositions including a (metal) zeolite having a crystal lattice that incorporates a metal oxide, wherein the metal oxide is covalently bound to elements within the crystal lattice. The metal oxide forms an integral part of the (metal) zeolite crystal lattice, forming covalent bonds with at least the Si or Al atoms within the crystal lattice of the (metal) zeolite, and is dispersed throughout the (metal) zeolite crystal lattice. The metal oxide can substitute atoms within the crystal lattice of the (metal) zeolite.

A 3D structure of the graphite-titanium-nanocomposite complex and a method of preparing the graphite-titanium-nanocomposite complex are disclosed. The Graphite-titanium-nanocomposite complex includes a metal core associated with the two phases, amine functionalized graphite, and amine functionalized titanium. The method of preparation includes amine functionalizing of graphite and titanium with coupling agents to produce amine functionalized titanium and graphite, further mixing with a metal ion solution for synthesizing an ion complex. Trisodium citrate solution and sodium borohydride solution is added to the ion complex to prepare a 3D structure of the graphite-titanium-nanocomposite complex, employed as a catalyst.