Method for producing hydrophobized mixed metal oxide nanoparticles and use thereof for heterogeneous catalysis

• Main Authors: Biemelt, Tim, Grothe, Julia, Wegner, Karl, Kaskel, Stefan
• Format: Patent
• Language: English
• Published: 29.12.2020
• Subjects: CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS; CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS THEREOF; FIRE-FIGHTING; HUMAN NECESSITIES; INORGANIC CHEMISTRY; LIFE-SAVING; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to methods for producing hydrophobized, doped or non-doped mixed metal oxide nanoparticles or doped metal oxide nanoparticles by flame spray pyrolysis, wherein a combustible precursor solution A, containing at least two metal alkyloates of general formula Me(OOC-R)x with differing metals Me, or a combustible precursor solution B containing at least one metal alkyloate of general formula Me(OOC-R)x and at least one metal salt containing a metal ion Me and at least one metal salt containing a metal ion Me, with Me selected from metal ions of the subgroups of the periodic system of the elements, with R=alkyl or aryl, wherein the alkyl chain is branched or straight, and wherein x corresponds to the oxidation step of the metal ion, is used in stoichiometric excess relative to a quantity of oxygen, and wherein a combustion ratio Φ of 3.5 bis 0.4 is established, and hydrophobized nanoparticles and the use thereof.