47 results about "Titania nanoparticles" patented technology

A one-step and room-temperature process for depositing nanoparticles or nanocomposite (nanoparticle-assembled) films of metal oxides such as crystalline titanium dioxide (TiO2) onto a substrate surface using ultrafast pulsed laser ablation of Titania or metal titanium target. The system includes a pulsed laser with a pulse duration ranging from a few femtoseconds to a few tens of picoseconds, an optical setup for processing the laser beam such that the beam is focused onto the target surface with an appropriate average energy density and an appropriate energy density distribution, and a vacuum chamber in which the target and the substrate are installed and background gases and their pressures are appropriately adjusted.

The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.

The invention discloses an olefin deoxygenation agent, its preparation method, and olefin deoxygenation method using the same. The preparation method includes (by weight parts) (1) mixing manganese source (as Mn3O4) 100, titania nanoparticle 58-100 and binder 1.5-25 to obtain a mixture; (2) calcining; (3) kneading the calcined mixture and a silver compound (as Ag2O) aqueous solution 8-35, and forming; (4) aging and drying; and (5) calcining. The second calcining temperature is lower than the first calcining temperature. The inventive olefin deoxygenation agent has high room-temperature deoxygenation capacity, high mechanical crushing strength, low deoxygenation depth, low reduction temperature, and wide applicability in industrial production.

The invention provides a preparation of a transition metal hexacyanoferrate / titanium dioxide nanocomposite catalyst: using transition metal chloride or transition metal nitrate, potassium ferrocyanide, and titanium dioxide as raw materials, through an in-situ chemical solution method , in situ growth of transition metal hexacyanoferrate (MHCF) on the surface of titania nanoparticles yielded MHCF / TiO 2 nanocomposite catalysts. The present invention also provides a kind of MHCF / TiO 2 Nanocomposite catalyst light-Fenton synergistic reaction method for degrading organic pollutants: in the dark reaction without light, MHCF can degrade organic pollutants in the form of Fenton reaction, and under ultraviolet light irradiation, titanium dioxide (photocatalyst) can Electron-hole pairs are generated, and electrons can be accelerated by H in MHCF 2 o 2 The reduction of oxidized ferric iron, at the same time, MHCF can also inhibit the recombination of photogenerated electrons and holes by accepting the electrons of titanium dioxide, thereby accelerating the Fenton reaction and the efficiency of hydroxyl radicals generated by the photocatalytic process. have very good degradation efficiencies.