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Abstract
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The Mg/Al- NO3 layered double hydroxide (LDH) with [Cr(C2O4)3]3- anions in the interlayer space has been synthesized following two different routes; direct co-precipitation method, and anion exchange from a Mg/Al- NO3 LDH. The prepared samples have been characterized by powder X-ray diffraction (PXRD) and Fourier transform infrared spectroscopy (FT-IR). The results obtained indicate that the most appropriate method is anion exchange, and the least appropriate method is direct co-precipitation, leading to a well crystallized LDH with interlayer spacing of 8.3 , 9.5 Å, respectively. The FT-IR study shows, most of the characteristic bands of the complex are also recorded in the FT-IR spectrum of sample Mg/Al-Cr-cp and Mg/Al-Cr-an, Which indicates the successful intercalation of [Cr(C2O4)3]3- anions into the LDH.
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