The Effect Of Heat Treatment On Phase Transformation And Morphology Of Nano-Crystalline Titanium Dioxide Tio2
Journal: International Journal of Scientific & Technology Research (Vol.6, No. 6)Publication Date: 2017-06-15
Authors : Yadanar Win Myint; Tun Tun Moe; Wint Yi Linn; Anjae Chang; Phyu Phyu Win;
Page : 293-299
Keywords : Nanocrystalline TiO2; Precipitation method; Heat treatment; Phase transformation;
Abstract
Effect of heat treatment on different properties of Titanium dioxideTiO2 nanocrystal is being reported. Nanocrystalline TiO2 was synthesized via chemical precipitation methods using TiCl3 as starting material with two types of precipitants NaOH and NH4OH. The effect of calcination temperatures 300500 and 90026730C on the crystalline structure phase formation and morphology of synthesized TiO2 were investigated by Xray diffraction XRD and Scanning electron microscope SEM. For precipitation method using TiCl3 NaOH the structure and phase determination using XRD analysis were confirmed the small crystallite size in the range of 11nm to 31nm with rutile phase. In the case of TiCl3 NH4OH phase transformation from anatase to rutile was clearly observed at annealing temperature of 90026730C. The SEM range revealed that almost of the nanocrystals are in spherical shape and effect of heat treatment on particle size was observed. According to the results pH does not influence the TiO2 morphology but the agglomeration becomes higher when the temperature calcination is increased.
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