“…The second step in the range of 200-330°C is mainly attributable to the dehydroxylation of the octahedral layers in LDH [26]. The third step observed above 450°C is due to the elimination of NO 3 − [53,54]. In fact, the results of XRD patterns, FT-IR spectra, and TG-DTG analysis all indicate the existence of nitrate ions between the layers of LDH.…”