The peak around 1625–1629 cm−1 indicates the presence of ketone, aldehyde, carbonates or carboxylic acid groups that may result from the incomplete combustion and decomposition of the precursor compounds during synthesis process. The bands in the range of 1383–1385 cm−1 correspond to carbonates and are proportional to the amount of Al2O3 [36]. The lower wavenumber region shows typical M\O band at 564–746 cm−1, and the peaks at 602– 580 cm−1 can be associated to the