Abstract
The synthesis of nanocrystalline TiO 2 powders obtained from the hydrolysis of Ti(OBu n ) 4 in the presence of polyvinylpyrrolidone (PVP) was investigated. Porous titania with a Brunauer–Emmett–Teller surface area up to 65 m 2 g −1 and distribution of pores in the range of mesopores were obtained after heat treatment at 500 °C devoted to the removal of PVP from TiO 2/PVP composites. The influence of PVP on the phase transformation of TiO 2 from anatase to rutile was investigated by using X-ray diffraction and Raman spectra. It was found that PVP could noticeably enhance the transformation by reducing the onset transformation temperature. The obtained powders were also characterized by differential scanning calorimeter, transmission electron microscopy and high-resolution electron microscopy.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
