Interstratification of trioctahedral and dioctahedral smectites through delamination and costacking

Interstratified composite of the anionic clays, Zn5(OH)8(NO3)2∙2H2O and Ni3Zn2(OH)8(NO3)2∙2H2O, by delamination-costacking

“…Synthesis of interstratified composites of layered solids is gaining considerable attention due to the possibility of fine tuning the intrinsic properties of the layered materials involved [1][2][3][4][5][6][7][8].…”

“…One of the methods employed in the synthesis of interstratified composites is co-stacking of layers from two layered solids starting from the colloidal dispersions of these solids achieved through delamination in suitable solvents [1,[4][5][6][7][8]. Delamination, which causes the separation of the constituent layers of a layered solid into 2-D macromolecular sheets [9,10], facilitates uniform mixing of the two components during composite preparation.…”

“…Zinc hydroxysalts of the formula Zn 5 (OH) 8 [20]. The structure of these solids is derived from that of brucite.…”

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

“…We have earlier shown that the thermal stability of the layers of two layered solids increases when the layered solids are interstratified [7,9]. We expect improved enhancement of thermal stability in the layer-by-layer composites since the layers of the anionic clay are separated from one another by the layers of the cationic clay.…”

“…Since the properties of the layered solid as well as the guest species can be altered in the composite, several methods have been developed to obtain such composites [3][4][5][6]. We have earlier shown that delamination of layered solids followed by restacking the exfoliated layers in the presence of guest species is a good method for the preparation of well dispersed layered composites [7][8][9]. Many layered composites have been prepared through this route in the recent past [10][11][12].…”