COATED METAL OXIDES AND HYDROXIDES

摘要

Process for preparing nanoparticles of a metal or metalloid oxide or hydroxide is described which comprises heating a decomposable salt of the metal in the presence of a capping agent which is a solvent for the salt to a temperature sufficient to convert the salt to the corresponding oxide and causing the oxide to precipitate by the addition of a non-solvent therefor. Nanoparticles of oxide or hydroxide of one or more metals and/or metalloids which possess a hydrophobic coating or an organic acid or anhydride or ester or Lewis base are also disclosed.