Process for preparing and self-assembling property of nanobinary and ternary oxy/hydroxides
AssigneeCouncil of Scientific and Industrial Research
InventorsBoyapati Choudary, Swarna Vallabha, Bontha Reddy, Lakshmi Mannepalli, Mandapati Rao, Kottapalli Rao, Vijaya Kondapuram
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Abstract
A process is disclosed for preparing and self-assembly of nanobinary and ternary metal oxy/hydroxides with high surface area and 1-10 nm size by aerogel procedure, involving homogenization of metal organic precursors in solvent mixture, controlled hydrolysis, gelation, hydrothermal treatment and finally supercritical drying of solvent.
Claims36
A process for the preparation of homogeneous nanobinary or ternary metal oxy/hydroxide of LDH with high surface area and 1-10 nm particle size by an aerogel protocol, comprising:
- hydrolysis of a metal alkoxides or metal acetylacetonates in a solvent mixture selected from alcohols and hydrocarbons, by controlled addition of deionised water or a mixture thereof with alcohols,
- aging for 6 to 16 hours,
- followed by hydrothermal treatment and finally
- supercritical drying to obtain a free flow powder of homogeneous nanobinary or ternary metal oxy/hydroxide of LDH.
(canceled)
A process for the preparation of self-assembled layered double hydroxides made of homogeneous nanobinary or ternary metal oxy/hydroxide of LDH of high surface area and 1-10 nm particle size, comprising:
- hydrolyzing a metal alkoxide or metal acetylacetonate in a solvent mixture selected from alcohols and hydrocarbons, by controlled addition of deionised water or a mixture thereof with alcohols,
- aging for 6 to 16 hours,
- followed by hydrothermally treating and finally supercritical drying to obtain a free flow powder of homogeneous nanobinary or ternary metal oxy/hydroxide of LDH,
- adding anions selected from the group consisting of carbonates, phosphates, chromates, ibuprofen, salicylic acid and tartaric acid to self assemble the free flowing powder into normal layered double hydroxides.
(canceled)
Dependencies are inferred from the claim text.