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IJSTR >> Volume 6 - Issue 6, June 2017 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



The Effect Of Heat Treatment On Phase Transformation And Morphology Of Nano-Crystalline Titanium Dioxide (Tio2)

[Full Text]

 

AUTHOR(S)

Yadanar Win Myint, Tun Tun Moe, Wint Yi Linn, Anjae Chang, Phyu Phyu Win

 

KEYWORDS

Nanocrystalline TiO2, Precipitation method, Heat treatment, Phase transformation

 

ABSTRACT

Effect of heat treatment on different properties of Titanium dioxide(TiO2) 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 (300,500 and 900˚C) 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 900˚C. 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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