Effect of various factors influencing the delamination behavior of surfactant intercalated layered double hydroxides

A critical assessment of the methods for intercalating anionic surfactants in layered double hydroxides

“…Intercalation entails the incorporation of the anion into the LDH-A by direct contact with the desired surfactant solution of the appropriate concentration (Kopka et al, 1988;Meyn et al, 1990;Xu & Braterman, 2003;Boehm et al, 1977;Clearfield et al, 1991;Zhao & Nagy, 2004;You et al, 2000b;Venugopal et al, 2006;Crepaldi et al, 2000). Kopka et al (1988) Zhao & Nagy (2004) concluded that it was not only the pH of the exchange solution that had an effect on the basal spacing, but also the Mg:Al molar ratio of the LDH.…”

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

“…Delamination of anionic clays, which was first reported by Adachi-Pagano et al [12] using surfactantmodification of zinc aluminum layered double hydroxide (LDH), led to the exploration of delamination of various other members of anionic clays [13,14]. Several methods have been developed to delaminate anionic clays in various solvents [15][16][17]. Different methods available for the delamination of anionic clays have increased the number of routes available for the preparation of layered composites based on these solids [2,4,10].…”

Effects of dodecyl sulfate and nitrate anions on the supercapacitive properties of α-Co(OH) 2

“…The absorption peaks at around 610 and 518 cm À1 in the low wavenumber region can be assigned to d (Co-O-H) and m (Co-O) vibrations, respectively [34]. The bands located at 2920, 2851 cm À1 (C-H stretching vibrations), 1468 cm À1 (C-H bending vibrations), 1217 cm À1 (C-H twisting vibrations), 1136, 1065, 995 cm À1 (-SO 4 vibrations) in curve a are ascribed to DS anions [35,36]. There is a sharp absorption peak at 1384 cm À1 corresponding to intercalated nitrate stretching vibration in curve b, while the bands related to DS anions disappear.…”