Abstract

Hydrotalcite (HT) has the chemical formula Mg6Al2 (OH)16CO3 •4H2O, with a stacked crystal structure comprising layers of positively charged hydroxides that are interlayer anion neutralization as carbonate and contain H2O particles. These double hydroxides in layers (LDH) are a class of highly fascinating materials for the industry due to the simplicity of their production and the ability to add additional layer cations and interlayer anions. Hydrotalcite-based materials such as magnesium aluminide (MgAl) hydrotalcite with a range of magnesium to aluminium (Mg/Al) molar ratios are used to prepare catalysts for effective changes of organic molecules. X-ray diffraction and scanning electron microscopy (SEM) characterization measure the catalyst's crystallinity, surface area, and shape. The HT has been employed as a scaffold for immobilizing numerous metals, enabling highly selective organic reactions, i.e., the dehydrogenation of alcohols and the deoxygenation of epoxides. It may also work with other metal catalysts to speed up subsequent responses in a single pot. It offers a vital method for the environmentally responsible synthesis of valuable compounds. This chapter overviews the hydrotalcite synthesis, classification, and application research.