Effect of pH on Hydrothermal Synthesis of Boehmite from Aluminum Hydroxide

Abstract

Effects of pH on hydrothermal synthesis of boehmite from aluminum hydroxide were studied. The phases of products were identified by the X-ray diffraction method (XRD) and the morphologies of the particles were observed by scanning electron microscopy (SEM). From the XRD patterns, when the samples were prepared at pH ≥ 10, all the peaks were indexed as boehmite. On the other hand, the samples prepared at pH < 10 were involved the peak of gibbsite and boehmite.