Solid State Preparation of TiO2 Nanoparticles in Optimal NaCl: TiOSO4 Weight Ratio and Milling Time

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A solid-state reaction of TiOSO4.xH2SO4.yH2OTiO2 + (x+y)H2O + (x+1)SO3 was induced during milling to synthesis the titanium dioxide nanoparticles. Titanyl sulphate (TiOSO4.xH2O.yH2SO4) and NaCl powders were used as the reactant and diluent phases, respectively. Annealing the as-milled powder at 700°C along with diluent phase and the removal of the NaCl through washing resulted in fairly equiaxed anatase and rutile TiO2 nanoparticles with the mean size in the range of 15-55 nm. The effect of volume fraction of diluent phase (NaCl) and milling time on the particle size distribution, agglomeration and anatase to rutile phase transformation (AR) of TiO2 nanoparticles were investigated by X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Investigations showed that increasing the NaCl: TiOSO4 weight ratio (NTR) leads to the formation of nanocrystalline anatase and rutile particles with more uniform size distribution, lower weight ratio of rutile phase and lower agglomeration of particles. Also, it was found that increasing the milling time can effectively decrease the nanocrystalline size of TiO2 down to 16nm and impede A  R transformation

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Periodical:

Pages:

15-21

DOI:

10.4028/www.scientific.net/JNanoR.6.15

Citation:

M. Salari et al., "Solid State Preparation of TiO2 Nanoparticles in Optimal NaCl: TiOSO4 Weight Ratio and Milling Time", Journal of Nano Research, Vol. 6, pp. 15-21, 2009

Online since:

June 2009

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$35.00

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