Affiliation

Laboratory of the Physico-Chemistry of Solid States, LR11 ES51, University of Sfax, Road of Soukra km 4, Sfax3038, Tunisia

Corresponding Author

 Salem. Babay, Laboratory of the Physico-Chemistry of Solid States, LR11 ES51, University of Sfax, Road of Soukra, Tunisia,Tel : (+216) 90122344 ; E-mail: salem.babay@yahoo.fr

Citation

Babay, S. et al. Comparison of Different Synthesis Ways for Mg–Al- Layered Double Hydroxides (LDH), Effects Of Ultrasound Treatment and Characterization of the Structural Phases By Rietveld Refinement. (2017) J Nanotechnol Material Sci 4(2): 53- 61.

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© 2017 Babay, S. This is an Open access article distributed under the terms of Creative Commons Attribution 4.0 International License.

Keywords

Abstract

  Layered Double Hydroxides (LDH) with carbonate as interlayer anion and an Mg²⁺/Al³⁺ ratio of 3 (also denoted as Mg–Al–CO₃–LDHs in this paper), were synthesized based on the coprecipitation method under different synthesis conditions: under ultrasound treatment and without ultrasound treatment. The effects of ultrasound irradiation on the structural, textural and sorption behavior of fluoride ion from contaminated water by the LDH products were studied, resulting in higher basal spacing’s, smaller crystallite size and higher removal efficiency of fluoride in contaminated water compared to an Mg-Al layered double hydroxides prepared without sonication. The material of Mg-Al-CO₃, molar ratio Mg: Al of 3 prepared by conventional method of co-precipitation without ultrasound treatment is characterized by Rietveld refinement of the X-ray powder diffraction pattern, DTA-TGA, Infrared and Raman spectroscopes. The thermal behavior of synthetic hydrotalcite is studied by heating stage Raman microscopy and heating stage of X-ray powder diffraction. The decomposition of this hydrotalcite-like structure on heating up to 600°C yields a mixture of two phases: a percales MgO phase and a spinal-like phase of MgAl₂O₄, which is also tested in the removal of fluoride in contaminated water, and which has higher removal efficiency (64.5%).