Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Effect of an organic template in the morphology and microstructure of nano alumina

Many methods have been proposed to prepare nano oxide materials; one of them is using organic templates. In this study, investigation on the effect of an organic template in the morphology and microstructure of nano alumina was conducted using a scanning electron microscope. Meanwhile, an organic template used was technical grade disachcharide. Aluminum salt solution was mixed with disachcharide compoud at various weight concentrations, namely 0%, 5%, 10%, and 15% (w/w). The mixture was then heated at 100°C producing caramel precursors. The precursors were calcined at 900°C for 5 hr. The final products were then characterized by XRD and SEM. XRD results show that two dominant phases of alumina are formed in every alumina sample, namely a- and g-Al2O3. SEM images show that after calcination treatment of alumina samples at 900°C, alumina without template has a homogenous morphology and larger particles ranging from 100 to 300 nm in size, whereas alumina with various template concentrations have a homogenous morphology and smaller particle sizes below 100 nm.