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https://www.ias.ac.in/article/fulltext/boms/040/04/0745-0751

Nanostructures; precipitation; Fourier-transform infrared spectroscopy; X-ray diffraction; electron microscopy.

Layered double hydroxides (LDHs), also called anionic clays, consist of cationic brucite-like layers and exchangeable interlayer anions. These hydrotalcite-like compounds, with Zn and Al in the layers and chloride in the interlayer space, were prepared following the coprecipitation method at constant pH. The effect of pH, aging time and anion concentration on the intercalation of fluorophosphate (PO$_3$F$_2$−, FP) in the [Zn–Al] LDH was investigated. The best crystalline material, with high exchange extent, was obtained by carrying out the exchange at 25◦C in a 0.03 M FP solution at pH 7 with at least 42 h of aging time. A mechanism for the FP intercalation was confirmed by X-ray diffraction, infrared spectroscopy and thermogravimetry (TG) analyses (TG and DTG curves).

EL HASSAN ELKHATTABI¹ MOHAMED LAKRAIMI² MOHA BERRAHO¹ AHMED LEGROURI^{3 4} RADOUAN HAMMAL⁵ LAYLA EL GAINI¹

1. Faculté des Sciences Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakech, Morocco
2. Ecole Normale Supérieure, Cadi Ayyad University, BP 2400, 40000 Marrakech, Morocco
3. International University of Grand-Bassam, BP 564, Grand Bassam, Côte d’Ivoire
4. Al Akhawayn University, BP 104, 53000 Ifrane, Morocco
5. Faculté des Sciences, Chouaib Doukkali University, BP 20, 24000 El Jadida, Morocco

Published

15 August 2017

Manuscript received

24 April 2016

Accepted

16 September 2016