Alumina was synthesized via sol-gel technique by the hydrolysis of aluminium ion controlled by urea in aqueous media. The resulting sol composed of Al(OH) 3 particles coalesced and became a transparent gel. The freshly prepared gel was heated at 280C to obtain alumina particles. The obtained particles were found to be amorphous -alumina particles with high porosity, characterized by FTIR, XRD and S BET techniques. Electron micrograph shows that the particles are nano-sized having non-spherical shape. Comparatively higher magnitude of adsorption of cationic surfactant indicated that the surface of alumina particles is negatively charged.
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Md. Rabiul Karim (2011) studied this question.
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