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Abstract : Universiti Pendidikan Sultan Idris |
Green synthesis of gamma alumina (?-Al2O3) nanoparticles (NPs) with facetted and cubeoctahedral morphologies was undertaken from waste (beverage aluminium cans) via precipitation technique and calcination at the temperature of 1000oC. The structural properties of ?-Al2O3 were determined with a combination of techniques including BET surface area, field emission scanning electron microscopy (FESEM) with energy dispersive x-ray spectroscopy (EDX), transmission electron microscopy (TEM) and x-ray powder diffraction (XRD). XRD analysis confirmed the formation of ?-Al2O3 NPs by comparing with the standard of ?-Al2O3 structure. The BET surface area measured was 129 m2/g. High-resolution transmission electron microscopy (HRTEM) analysis provided evidence of surface-enhanced contrast in facetted ?-Al2O3 NPs structures similar to the commercial ?-Al2O3 NPs. ? Malaysian Journal of Microscopy (2021). All rights reserved. |
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