A Study on Structure/Phase Transformation of TiO₂ nanorods at Various Annealing Temperatures

Synthesis of TiO₂ nanorods was conducted through mechanochemical of ball milling at speed of 175 rpm for 5 hours and strong base 12 M NaOH reaction by hydrothermal at 150°C overnight on variation annealing at 400, 500, and 600°C. Material characterization were performed by X-Ray Diffraction (XRD), Transmission Electron Microscoe (SEM), and Surface Area Analyzer (SAA). Strong base reaction by hydrothermal showed the presence of anatase, brookite, and rutile phase for annealing up to 400°C. The diffraction pattern of annealing at 500 and 600°C contain peaks of both brookite and rutile phase. Morphology transformation of TiO₂ to form nanorods TiO₂ was showed by rod-shape from TEM micrographs and increase surface area into 111.9 m²/g. (paper)