Adsorption properties of pillared clays

Photocatalytic and adsorption properties of TiO2-pillared montmorillonite obtained by hydrothermally activated intercalation of titanium polyhydroxo complexes

“…One of promising methods for modifying MM with titanium dioxide, called pillarization, consists in carrying out a reaction of exchanging the interlayer cations of MM for positively charged titanium polyhydroxo complexes or TiO 2 sol particles and subsequent thermal treatment to yield metal oxide nanocrystals (pillars) in the interlayer space of MM [ 3 , 5 ]. Pillarization of MM results in an increase in the distance between aluminosilicate layers in the structure of the clay mineral and the emergence of additional micro- and mesopores.…”

Changes in the Crystal Lattice Parameters of Montmorillonite during Its Modification by Cobalt and Aluminum Cations

“…The sorption characteristics of the initial and m od ified clay specimens with respect to azorubine (an anionic dye) and m ethylene blue (a cationic dye) organic dyes were determ ined in the range of low con centrations [23]. Below, we present the structural for mulas of (a) azorubine and (b) m ethylene blue: The results from our study are summarized in Table 2, which also lists the data from measuring the electrokinetic potentials of these specimens in an aqueous solution, obtained via electrophoresis on a ZetasizerNano unit (MALVERN Instrum ents, Great Britain).…”

“…Subsequent therm al treatm ent of the m aterial is accom panied by dehydroxylation of the introduced polyhydroxy cations, as a result of which m etal oxide clusters (columns or pillars) form in the interlayer space of m ontm orillonite that are strongly bound to the layers of alumosilicate clay by oxygen bridges. Clays subjected to this m odification are referred to as pillared [22,23].…”