Near 100% selectivity in anion exchange reactions of layered zinc hydroxy nitrate

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

“…It has been observed that Zn 5 (OH) 8 (NO 3 ) 2 •2H 2 O shows selective anion exchange when stirred in a mixture of halide ions [23]. However its instability in even slightly alkaline solution would limit its application in selective exchange.…”

Release behavior and toxicity profiles towards A549 cell lines of ciprofloxacin from its layered zinc hydroxide intercalation compound

“…LHS is currently gaining attraction due to its simple method of synthesis [10], as a precursor for a wide band gap ZnO [11], for the synthesis of layered double hydroxide salts [12] and anion exchange properties [13]. A wide variety of guest molecules has been intercalated into the interlayer region of LHS, mainly via ion exchange process, ranging from anionic dyes [14], porphyrin sensitizers [15] and an anti corrosive compound [16].…”

Theoretical study of the anion exchange properties and the thermal decomposition of Zn5(OH)8(NO3)22H2O and Zn5(OH)8(NO3)22NH3

“…al. which reported the XRD patterns of the resulting phases of the anion exchange (Thomas and Rajamathi, 2011). Those diffraction patterns indicated that they are isostructural to the simonkolleite (Zn 5 (OH) 8 Cl 2 •H 2 O).…”

“…In fact, one can notice that the enthalpy and entropy variation decreases with the anion's electronegativy. It has already been reported that those exchanges can be conducted experimentally with the ZHN compound, however the kinetics of those processes seem to have a large contribuition to the anion selectivity (Thomas and Rajamathi, 2011). Thomas et al discussed that the fluorides can hardly exchange with the nitrates due to its high hydration, which makes the anion mobility more difficult.…”

“…As mentioned above, the layered hydroxide salts, just like the layered double hydroxides, have been playing a major role on many applications fields such as: intercalations and immobilizations, anion exchanges (which is one of the main objectives of this article) and the property improvement in the yield of intercalated catalysts (Cursino et al, 2010;Marangoni et al, 2010;Thomas and Rajamathi, 2011;Da Silva et al, 2012;Wypych et al, 2012;Zimmerman et al, 2013). Those layered materials are good precursors of oxides, which are largely used as industrial catalysts, by means of thermal treatment (Kozawa et al, 2011).…”