Kourosh Motevalli - Applied Chemistry Department, Technical & Engineering Faculty, Islamic Azad University, South Tehran Branch,Tehran, Iran
Zahra Yaghoubi - Industrial Faculty,Islamic Azad University, South Tehran Branch,Tehran, Iran

In this letter, Barium oxide (BaO) particles were successfully synthesizedvia sol-gel approach using Barium acetate dihydrate(Ba(CH3COO)2 ·2H2O) and ammonia (NH4OH) solution as precursors.In fact, here, in this research which is done, By adjusting the reactionparameters such as amount of ammonia and reaction time as well ascomplexing agent aluminium sulphate Al2(SO4)3 , BaO nano particles withdifferent morphologies, that is, rodlike, ricelike and disklike could besynthesized. The effectiveness of BaO nano particles with differentmorphologies (rodlike, ricelike and disklike) on the photocatalytic activityhas been studied. The results showed that rodlike BaO nano particles werethe most effective in degrading the Rhodamine B (RhB) solution under theillumination of ultraviolet (UV) light. The rate constant was found to be firstorder, with rodlike particles the highest (0.06329 min−1 ), followed by ricelikeBaO nano particles (0.0431 min−1 ) and disk-like BaO nano particles(0.02448 min−1 ).

Photocatalyst , kinetic survey , degradation , nano particles, dye