Preparation of M2+/M3+ layered double hydroxides (M2+=Zn, Ni, M3+=Fe): Effect of different M2+ to the layer formation

Abstract

Two different layered double hydroxides (LDH) materials, namely Ni-Fe LDH and Zn-Fe LDH, have been synthesized by the coprecipitation method under alkaline conditions. The prepared materials were characterized by X-ray diffraction and FT- IR in order to analyze the formation of LDH layer. Although both LDHs contains different M2+ metal, they consist of the same M3+ metal cation, i.e., Fe. Hence, in this work, the effect M2+ metal composition on the formation of LDH layer was investigated. According to the X-ray diffraction analysis, the synthesized ZnFe LDH showed a typical diffraction peak at 2θ of 11.08° with the basal spacing value of 7.98 Å. While for the NiFe LDH exhibited a typical diffraction peak at 2θ around 11.41° with a basal spacing value around 7.74 Å.