Synthesis of composite beads coated with layered manganese oxide and use of such beads to remove toxic elements contained in fluids
AssigneesCentre National de la Recherche Scientique, Commissariat Al'energie Atomique Et Aux Enegies Alternatives, Cy Cergy Paris Université, Universite D'Evry Val D'Essonne
InventorsSophie Peulon, Anne Pensel
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Abstract
The present invention relates to composite beads coated with H-Birnessite layered manganese oxide with a sheet nanostructure, the average thickness of the sheets being between 1 and 50 nm, and the length L of the sheets being between 0.2 μm and 3 μm, as well as the manufacturing method thereof and a cell for producing said composite beads. The present invention also relates to the use of such beads in treatments for decontaminating fluids containing toxic elements such as heavy metals or organic pollutants.
Claims15
A composite bead comprising a support particle made of conductive material, said support particle having a three-dimensional shape, and a continuous and nanostructured coating covering said support particle, said coating consisting of a layered manganese oxide belonging to the phyllomanganates family and having a nanostructure in the form of sheets of average thickness e and length L,
- wherein:
- the layered manganese oxide constituting the coating is H-Birnessite with sheets whose average thickness e is between 1 and 50 nm and whose length L of the sheets of said coating is between 0.2 μm and 3 μm.
A method for decontaminating a fluid containing at least one toxic element, comprising degrading the at least one toxic element with composite beads, wherein the composite beads comprise a support particle made of conductive material, said support particle having a three-dimensional shape, and a continuous and nanostructured coating covering said support particle, said coating consisting of a layered manganese oxide belonging to the phyllomanganates family and having a nanostructure in the form of sheets of average thickness e and length L, wherein the layered manganese oxide constituting the coating is H-Birnessite with sheets whose average thickness e is between 1 and 50 nm and whose length L of the sheets of said coating is between 0.2 μm and 3 μm.
Dependencies are inferred from the claim text.