Electro-fluorescence polarization studies of the interaction of fluorescent dyes with clay minerals in suspensions

Multifold Fluorescence Enhancement in Nanoscopic Fluorophore–Clay Hybrids in Transparent Aqueous Media

“…[15] As pointed out, using choline + and aeta + as exchanging cations,e xchange rates of 50-100 %o ft he cec becomep ossible, yet complete water dispersibility was retained, without alteration of the stabilitya nd transparency of the dispersions, even at higherdye loadings ando ver longerperiods of rest.…”

Recent progress in dispersion of palygorskite crystal bundles for nanocomposites

“…The special crystal structure, stacking mode and nanometric dimension of the rod crystals of Pal endow it with plentiful pores, higher aspect ratio, better ion-exchange capacity (about 30 to 40 meq/100 g), and affluent surface groups (Haden, 1963;Gonzalez et al, 1989;Cao et al, 1996;Windsor and Tinker, 1999;Murray, 2000). So, Pal shows excellent colloidal, adsorption, reinforcing properties, and thermal/ mechanical stability (Jones and Galan, 1988), and has been applied as ideal candidates in many fields of nanotechnology such as colloidal or stabilizing agents (Abdo and Haneef, 2013;Abdo, 2014;Chemeda et al, 2014;J.…”

Characterization and 2,4-D adsorption of sepiolite nanofibers modified by N-cetylpyridinium cations

“…The bands at $3689, $3565 and 3411 cm À1 are attributed to the existence of diverse water molecules in the structure of the mineral. The band at $3689 cm À1 is related to stretching vibrations of hydroxyl groups (mOH), which are attached to octahedral Mg ions placed in the interior of the crystal blocks [24,25], and the Table 2 The chemical analysis of sepiolite using XRF spectrometry. $3565 cm À1 band corresponds to the Mg-coordinated water molecules [26].…”