Formation of Spherical and Rod-Shaped TiO_2 Nanocrystals Prepared by Reverse Micelle Method

摘要

Uniform spherical- and rod-shaped TiO_2 nanoparticles of anatase phase were prepared using decanoic acid at 300°C by reverse micelle method. The nanoparticles were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffractometry (XRD) and FT-Raman spectroscope. The content of decanoic acid and operating temperature were noted as crucial parameters, controlling the shape, size and phase of TiO_2 nanoparticles. RMS roughness (1.62 nm), measured by atomic force microscope (AFM), confirmed its superiority over other methods. The DCB photodegradation reaction rate constant (first order) TiO_2 nanoparticles was found superior to that of commercial TiO_2, Degussa P-25.