Composite graphene-based material
AssigneeAdelaide Research & Innovation Pty Ltd
InventorsDusan Losic, Diana Tran, Shervin Kabiri
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Abstract
The present invention provides composite material having a porous graphene-based foam matrix and comprising porous inorganic micro-particles and metal oxide nano-particles distributed throughout the foam matrix.
Claims15
Composite material having (i) a porous graphene-based foam matrix comprising reduced graphene oxide and (ii) porous inorganic micro-particles and metal oxide nano-particles distributed throughout the foam matrix, wherein a surface of the composite material is functionalised with one or more of:
- sulfur-containing functional groups comprising a thiol group or a thio silane group, oxygen-containing functional groups comprising a hydroxyl group, phospho-containing functional groups, nitrogen-containing functional groups comprising an amine group, a quaternary ammonium group or an amino silane group, and a chelating agent selected from the group consisting of N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and N-(trimethoxysilylpropyl) diethylene triamine pentaacetic acid (DPTA-silane):
- wherein the ratio of graphene-based matrix to porous inorganic micro-particles ranges from about 6:1 to about 3:1 by weight.
A method of preparing composite material having (a) a porous graphene-based foam matrix comprising reduced graphene oxide and (b) porous inorganic micro-particles and metal oxide nano-particles distributed throughout the foam matrix, the method comprising:
- (i) providing a liquid dispersion comprising dispersed graphene-based material, porous inorganic micro-particles, and metal oxide nano-particles:
- (ii) forming a gel from the liquid dispersion:
- (iii) forming the composite material by removing the liquid from the so formed gel;
- and (iv) reacting surface functional groups of the so formed composite material with one or more compounds to covalently attach to the composite material sulfur-containing functional groups comprising a thiol group or a thio silane group, oxygen-containing functional groups comprising a hydroxyl group, phospho-containing functional groups, nitrogen-containing functional groups comprising an amine group, a quaternary ammonium group or an amino silane group, a chelating agent selected from the group consisting of N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and N-(trimethoxysilylpropyl) diethylene triamine pentaacetic acid (DPTA-silane), or a combination thereof;
- wherein the ratio of graphene-based matrix to porous inorganic micro-particles ranges from about 6:1 to about 3:1 by weight.
Dependencies are inferred from the claim text.