Synthesis of macroanion [α-SiW12O40]4- as pillaring agents to layered double hydroxide Zinc-M3+

Abstract

Abstract Polyoxometalate intercalated layered double hydroxide was prepared by ion exchange of zinc-aluminum and zinc-chromium LDH with macro anion [α-SiW12O40]4- at room temperature. The structural characterization was conducted with XRD, adsorption and desorption N2 by BET method and FTIR analyses. An interlayer space of zinc-aluminum and zinc-chromium was increased after the intercalation process. The interlayer space at reflection (003) shows zinc-aluminum and zinc-chromium intercalated LDH is 10.36 Å and 10.49 Å from 7.57 Å and 7.68 Å, respectively. The value of surface area zinc-aluminum and zinc-chromium before intercalation are 2.10 m2/g and 31.63 m2/g and increase after intercalation to 14.0422 m2/g and 128.87 m2/g, respectively. This phenom identifies that both LDH has a great reflexibility based on anion in the interlayer.