Synthesis and characterization of bentonite/Co۳O۴(Be/CO) nanocomposite

Bentonite comprises a group of layered silicates.A comprehensive review of the literaturereveals that the chemical composition of calcium-containing bentonite is not uniform and variesdepending on its origin. In general, clay minerals consist of Si, Al, Fe, H۲O, and alkaline/alkalineearth metals[۱]. The primary structure of bentonite consists of two atomic lattice units, namelytetrahedral and octahedral layers. The tetrahedral layer contains Si۴+ ions at its center, surroundedby O۲- ions, while the octahedral layeris formed by Al۳+ ions in the middle, surrounded by sixOH- ions at the corners[۲].The ion exchange process of Si۴+ and Al۳+ is accomplished withcations of lower valence such as Fe۳+/Mg۲+/Ca۲+ and Na+.The current study investigates thesurface absorption capacity of natural bentonite soil, which has been modified with sulfuric acid,to enhance its absorption capacity. To achieve this, bentonite soil has been impregnated withcobalt oxide nanoparticles using the in-situ synthesis method[۳].X-ray diffraction (XRD)analysis, Field emission scanning electron microscopy (FE-SEM), and X-ray scattering analysisenergy (EDX) were carried out to identify natural bentonite soil and to modify it with cobaltoxide nanoparticles.The results indicated that the cobalt oxide nanoparticles were dispersed onthe surface ofbentonite soil.

کلیدواژه ها:

Bentonite ، Co۳O۴ ، characterization