A NEW STRATEGY FOR SYNTHESIS OF DIFFERENT VARIETIES OF SULFATE INTERCALATED ZINC-CHROMIUM LAMELLAR DOUBLE HYDROXIDES

Authors
KHALDI M DEROY A CHAOUCH M BESSE JP
Citation
M. Khaldi et al., A NEW STRATEGY FOR SYNTHESIS OF DIFFERENT VARIETIES OF SULFATE INTERCALATED ZINC-CHROMIUM LAMELLAR DOUBLE HYDROXIDES, Annales de chimie, 23(1-2), 1998, pp. 337-340
Citations number
8
Categorie Soggetti
Chemistry,"Material Science
Journal title
Annales de chimie → ACNP
ISSN journal
01519107
Volume
23
Issue
1-2
Year of publication
1998
Pages
337 - 340
Database
ISI
SICI code
0151-9107(1998)23:1-2<337:ANSFSO>2.0.ZU;2-B
Abstract
The synthesis of zinc-chromium Lamellar Double Hydroxides (LDHs) inter calated by sulfate anions was carried out using three synthetic method s. The combination of coprecipitation and anionic exchange in one stag e allows to prepare the well organised [Zn-Cr-SO4] LDHs. Depending on pH conditions and washing process the sulfate intercalated LDH exhibit s two 2H hexagonal varieties with different layer spacings d approxima te to 8.9 Angstrom and d approximate to 11 Angstrom at room temperatur e; this latter with superstructure was related to the insertion of the alkaline interlamellar cations.