Back to results
US 11,739,002 B2Granted
Non-metal doped metal oxides formed using flame spray pyrolysis
OwnerSiva Nagi Reddy Inturi, Thirupathi Bonningari +2inventors
InventorsSiva Nagi Reddy Inturi, Thirupathi Bonningari, Makram Suidan, Panagiotis G. Smirniotis
Life of this patent
Estimating the term…
Abstract
Methods of forming non-metal doped metal oxide nanoparticles using a flame spray pyrolysis process are described. The non-metal doped metal oxide nanoparticles exhibit high photocatalytic activity. Specific non-metal doped metal oxides nanoparticles which can be formed by the described processes include nitrogen-doped titanium dioxide and sulfur-doped titanium dioxide.
Claims19
A method of making non-metal doped metal oxide particles comprising:
- forming a precursor composition comprising:
- reacting a metal oxide precursor and a dopant in a solvent to form a metal compound;
- adding a fuel source to the metal compound and solvent to form a precursor composition;
- and
- wherein the metal compound and the fuel source are soluble in the solvent;
- atomizing the precursor composition;
- and
- igniting the atomized precursor composition in a flame spray apparatus to form non-metal doped metal oxide particles at a temperature of combustion from about 1100° C. to about 1750° C., wherein the metal oxide comprises an oxide of one or more of beryllium, magnesium, calcium, strontium, barium, scandium, yttrium, lanthanum, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, technetium, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, zinc, cadmium, aluminum, gallium, indium, silicon, germanium, tin, arsenic, antimony, bismuth, selenium, and tellurium.
5 more elements
Dependencies are inferred from the claim text.