Anatase Nanoparticles Stabilization via Mechanochemical Activation of TiOSO₄

M. Salari*, M. Rezaee**, P. Marashi***

Mining and Metallurgical Department, Amirkabir University of Technology, Tehran, Iran

*First author: E-mail: mary.salari@yahoo.com

**Presenting author: E-mail: m_rezaee@@aut.ac.ir

***Corresponding author: E-mail: pmarashi@aut.ac.ir

ABSTRACT

Mechanochemical processing of titanyl sulphate powders was used to produce nanocrystalline powders of titania. The effect of milling time on TiO2 nanocrystalline size and anatase to rutile phase transformation (AàR) is investigated. Thermograviometric analysis and differential thermograviometric analysis (TGA/DTG) was employed to study the thermal behavior of precursor. Phase analysis, crystallite size, d‑spacing and particle morphology of the synthesized powders were determined by X‑ray diffraction (XRD) and Transmission Electron Microscopy (TEM). Experimental results confirmed that increasing the milling time can effectively reduce the nanocrystalline size of TiO₂ down to 5-20nm and hinder AàR transformation.

Keywords: Mechanochemical processing; milling time, lattice fringes, anatase, TiO₂

Corresponding author contact: Mining and Metallurgical Department, Amirkabir University of Technology, Tehran, Iran, P. O. Box 15875 4413, Fax: 00982188522421, Tel.: 00982164542909