A variation of excess hydrolysis synthesis was used to synthesize titanium oxide nanoparticles using Titanium Tetraisoproproxide at varied pH values. The nanoparticles were left in solution from times varying between two hours and twelve months. The synthesized nanopowders were then heated to temperatures between 80° C and 750° C varying between one and two hour time increments at each temperature. Differential Scanning Calorimetry (DSC) was used to further refine the heating ranges to get a more accurate range at which the nanopowders changed phase. Titanium oxide nanoparticles left in solution for over twelve months were characterized without heating. After being synthesized, each of the nanopowder samples were characterized according to their size, composition and phase, and absorbance properties using Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and UV-Vis Spectroscopy, respectively. The spectra and diffraction patterns were used to determine the temperature required to induce a phase change from the amorphous to anatase structure and anatase to rutile structures. The nanoparticles left in solution were characterized to determine if they existed as a single crystalline phase. The resulting spectra were compared to literature spectra to ensure that pure samples of each species of nanopowder were obtained.

Synthesis and characterization of titanium oxide nanopowders

249th National Meeting (2015)

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