The present invention combines the advantages of fabrication of semiconductor heterostructure (Ag.sub.3PO.sub.4WO.sub.3) with plasmonic metals (Pt and Ag) with optical interference to optimize the visible light photo response of plasmonic metals deposited semiconductor (PtAg/Ag.sub.3PO.sub.4WO.sub.3) for visible light assisted H.sub.2 generation utilizing the aqueous bio-alcohols. Crystalline Ag.sub.3PO.sub.4 and WO.sub.3 nanofibers were synthesized by microwave and electrospinning methods. Three different WO.sub.3 nanofibers composition (5, 10 and 15 wt. %) were used to obtain Ag.sub.3PO.sub.4/WO.sub.3 nanocomposite heterostructures, which are effective visible light active photo catalysts. Further, a simple, enviro-friendly, and cost-effective biogenic synthesis method have been achieved using Salvia officinalis extract to decorate Pt and Ag metal nanoparticles on the surface of Ag.sub.3PO.sub.4WO.sub.3 composites. Presence of bioactive agents in the extract are responsible for the Pt and Ag.sub.3PO.sub.4 reduction and for prevention of the Pt nanoparticles from aggregation in aqueous medium.

The present invention discloses a core-shell structure supported tungsten composite catalyst and a preparation method and use thereof. Most of the existing synthesis methods of the main ring of quinolone drugs have the defects of many synthesis steps, cumbersome operation, large amount of three wastes, higher costs and the like. The present invention prepares a magnetic separable core-shell supported tungsten composite catalyst, WO.sub.3/SiO.sub.2/Fe.sub.3O.sub.4, by preparing Fe.sub.3O.sub.4 colloid and SiO.sub.2/Fe.sub.3O.sub.4 composite nano-particles. This magnetic separable core-shell supported tungsten composite catalyst, WO.sub.3/SiO.sub.2/Fe.sub.3O.sub.4, is used to catalyze and synthesize quinolone compounds. The present invention provides an efficient preparation method of quinolone compounds using a catalyst which can be recovered by magnetic separation and recycled. The catalyst prepared by the present invention can be reused in the preparation of quinolone compounds and still retains the original activity without deactivation, which not only greatly improves the production efficiency, but also reduces the environmental pollution.

In one embodiment, a product includes a nanoporous gold structure comprising a plurality of ligaments, and a plurality of oxide particles deposited on the nanoporous gold structure; the oxide particles are characterized by a crystalline phase.

Provided is a fabrication method of a photocatalytic material in which a single layer of a carbon-based participate is formed on a surface of each of titanium dioxide particle. The method includes (a) loading titanium dioxide particles into an electric furnace comprising a mechanism for rotating a core tube; (b) heating an inside of the core tube of the electric furnace into which the titanium dioxide particles have been loaded to a temperature of not less than 400 C. and not more than 800 C., while an inert gas is introduced into the inside of the core tube; (c) supplying a hydrocarbon gas to the inside of the core tube in addition to the inert gas; and (d) performing a thermal CVD on each of the titanium dioxide particles in a fluidized state inside the core tube, while the core tube is rotated, to form a single layer of a carbon-based precipitate containing graphene on a surface of each of the titanium dioxide particles. A photocatalyst material is provided.

A honeycomb structure including a honeycomb portion having porous partition walls extending from an inflow end face to an outflow end face to define cells forming through channels, an outermost peripheral wall, and a pair of electrode portions disposed on a side surface of the honeycomb portion. The electrode portions are formed in a strip shape extending in a direction of the cells. In a cross section orthogonal to the extending direction, one electrode portion of the pair of electrode portions is disposed on a side opposed to the other electrode portion across a center of the honeycomb structure portion. The honeycomb structure portion includes end regions near the pair of electrode portions and a central region excluding the end regions. An average electric resistivity A of a material forming the end regions is lower than an average electric resistivity B of a material forming the central region.

In one embodiment, a method includes depositing oxide nanoparticles on a nanoporous gold support to form an active structure and functionalizing the deposited oxide nanoparticles. In another embodiment, a system includes a nanoporous gold structure comprising a plurality of ligaments, and a plurality of oxide particles deposited on the nanoporous gold structure; the oxide particles are characterized by a crystalline phase.

An organic nanofiber includes a fiber body containing multiple inorganic oxide particles selected from polycrystalline titanium dioxide particles and polycrystalline tin(IV) oxide particles, and having a particle size ranging from 15 to 75 nm. A method for manufacturing the inorganic nanofibers, including: mixing a metal precursor, an organic polymer and a solvent to obtain a solution, the metal precursor being a titanium-containing precursor or a tin-containing precursor; electrospinning the solution at a relative humidity ranging from 50 to 60% to form multiple nanofibers; and annealing the nanofibers at a temperature ranging from 600 to 800 C. to obtain multiple inorganic nanofibers.

The present invention relates to a method for producing hollow activated carbon nanofibers for activating peroxymonosulfate used in water purification; a catalyst for water purification comprising the hollow active carbon nanofibers produced by the method; and a method for purifying contaminated water using the catalyst. The production method of the present invention can easily produce hollow activated carbon nanofibers capable of rapidly purifying contaminated water by highly efficiently activating peroxymonosulfate used for water purification.

The invention includes apparatus and methods for instantiating and quantum printing materials, such as elemental metals, in a nanoporous carbon powder.

The present disclosure relates to nanocomposites of CuO/Cu.sub.2O and continuous flow solar reactors. The nanocomposites can be utilized as a photocatalyst and can be incorporated into photoelectrochemical devices. The described devices, systems, and methods can be used for converting CO.sub.2 into one or more alcohols and other small organics with the use of solar energy and electricity. Other embodiments are described.