Phase Transition of Titania Nano-materials Controlled by Hydrothermal Method

摘要

TiO_2 nanofibers of various sizes and layered structure from inorganic titanium compounds by hydrothermal reactions were prepared. Using Titanium Etoxide as a raw material can make anatase- and rutile-structure particles, and these two type particles were mixed with different composition rate use to prepare TiO_2 nanowire with NaOH solution. The microstructure of TiO_2 nanowire made from mixtures of 75% of anatase structured particles and 25% of rutile structured particles showed rutile structure by XRD. The shapes of nanowires were change from fiber to needle in according to composition change from anatase of 100% to rutile of 100%.