Patent ID: 7449199
Filing Date: 2008-11-11
Classification: B01J,B82Y,C01B,C01F,C01G,C01P

Abstract:
1. A method of producing a nanostructural substance comprising a thin film-shaped material or a spherical-shaped material by spray thermal decomposition, the method comprising the steps of: (a) spraying to form droplets of a solution of (1) a water-soluble salt of at least one element selected from the group consisting of Ti, Fe, Ce, Zr, Ni, Zn, Cd, Si, Mg, Al, Ca, Pd, Ag, Ba, Cu, Li, Co, La, Y, Sr, Mn, Rh, Pt, Nd, Sm, Pb, Cr, Ga and Sc to form primary particles and (2) an inorganic element different from the one selected in (1), (b) charging the droplets into a high temperature field together with a reactive gas in which the sprayed droplets are entrained thereby drying and thermally decomposing the droplets to form primary particles, (c) recovering the thus produced particles, and (d) washing the particles collected to remove water-soluble salts, thereby producing a nanostructural substance comprising a thin film-shaped material or a spherical-shaped material comprising primary particles having a particle diameter of not more than 30 nm.