过氧钛酸水热法定向附着生长制备TiO2纳米棒

he sol of anatase TiO2 was prepared by a hydrothermal method with peroxotitauium acid as precursor, which was peptized by hydrogen peroxide with the titania precipitates. The effects of hydrothermal time and temperature on the nanoparticle size, crystallization and morphology were investigated. The structure of anatase TiO2 crystallites in the sol was characterized by XRD and TEM. It was confirmed TiO2 nanoparticles had anatase crystalline structure with high aspect ratio, nanorod-like shape, they grew along the c-axis. This results mean that increase the time and temperature of hydrothermal process could make for TiO2 nanoparticles aligned along crystal growth by the oriented attachment mechanism with the perfect crystallization. However, higher hydrothermal temperature resulted in some of nanoparticles aggregating.