The effect of naoh and koh on the characterization of mesoporous alooh in the solvothermal route

Abstract

In this study boehmite nanostructures have been successfully synthesized using solvothermal method at 180° C and at high basic pH (~13.5), when ethanol was as solvent. The effects of NaOH and KOH as pH adjusting regents on the characterization of synthesized samples were investigated in detail. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM), were used to characterize the samples. The specific surface area, pore size distribution and pore structure of the different boehmite structures at different condition were also discussed by the N2 adsorption/desorption test. According to our experimental results, the FESEM micrographs show that the samples synthesised by NaOH and KOH are nanostructure and nanoparticles, respectively. The obtained boehmite nanostructure from NaOH exhibited large surface area of 144 m2 g-1 and high total pore volume of 1.28 cm3 g-1.