The Open Colloid Science Journal

2011, 4 : 32-36
Published online 2011 July 29. DOI: 10.2174/1876530001104010032
Publisher ID: TOCOLLSJ-4-32

Synthesis of γ-Alumina Particles and Surface Characterization

M. R. Karim , M. A. Rahman , M. A. J. Miah , H. Ahmad , M. Yanagisawa and M. Ito
Department of Chemistry, Rajshahi University, Rajshahi 6205, Bangladesh.

ABSTRACT

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 280°C to obtain alumina particles. The obtained particles were found to be amorphous γ- alumina particles with high porosity, characterized by FTIR, XRD and SBET 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.

Keywords:

Alumina, Porosity, Adsorption, surface characteristics.