Layer-by-layer composite of anionic and cationic clays by metathesis

An alternately stacked layer-by-layer composite of oppositely charged layered solids was obtained by solvothermal treatment of the monolayer colloidal dispersions of dodecylsulfate intercalated nickel aluminum LDH and cetyl trimethylammonium intercalated smectite in 1-octanol. This composite shows altered thermal decomposition behavior compared to the parent solids. On heating the LDH component of the composite decomposes to NiO, while the layer structure of the cationic clay is retained up to 800 °C.

A simple route for the preparation of layer-by-layer composite of anionic and cationic clays through delamination followed by solvothermal treatment of the monolayer colloidal dispersions is presented..Figure optionsDownload high-quality image (53 K)Download as PowerPoint slideResearch highlights
► Surfactant-intercalated anionic and cationic clays were delaminated in 1-butanol.
► Solvothermal treatment of a mixture of the dispersions of both the clays yield a layer-by-layer composite of the clays.
► The anionic clay component of the composite is thermally more stable compared to the precursor.