Investigating the effects of Mixing, Reaction Time and Temperature in the Synthesis of Titanium Di-Oxide Nanostructures via Hydrothermal Method

TiO2 nanostructures can be synthesized via a single-stage hydrothermal reaction of TiO2 in an alkaline solution. Morphology of the synthesized nanostructures is affected by process parameters such as initial powder, NaOH concentration, reaction time and temperature, mixing time, etc. In this work, the effects of mixing, reaction time and temperature were investigated. The synthesized nanostructures were characterized by measuring specific surface area, Fourier transfer infrared spectroscopy (FT-IR), X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) micrographs. The obtained results showed that nanostructure products such as high and low surface area nanoparticles, nano tubes with internal diameter of 10-20 nm, wall thickness of 5-10 nm and length of 30-50 nm, and nano fibers with diameter of 50-200 nm and micrometric length can be synthesized by adjusting the investigated parameters. Also, it was confirmed that mixing in the synthesis reactor can be an effective factor in the synthesis of nano tubes and fibers.