Effect of various fuels on structure and photo-catalytic activity of TiO2 nano-crystalline prepared by microwave-assisted combustion method

Authors

1 Department of Inorganic Pigment and Glazes, Institute for Color Science and Technology

2 Young Research Club, Islamic Azad University, Shahr-e-Ray Branch

Abstract

Nano-crystalline TiO2 were synthesized by combustion method using metal nitrate solution and urea, glycin and citric acid fuels. Microwave irradiation was used as heating source. X-ray diffraction, scanning electron microscope as well as Fourier transform infrared spectroscopy were performed to characterize the obtained samples. X-ray diffraction patterns revealed that in the case of citric acid a calcination step was needed to obtain the desired phases. Moreover, the ratio of rutile/anatase phases varied from 25/75 to 0/100 as the fuel type changes from urea to glycine and citric acid. The crystallite size of the as-synthesized samples calculated by Scherer formula was 8-15 nm. From scanning microscopy images thick and thin flaky particles were detected for citric acid and urea samples and porous spongy morphology for glycine sample. Due to a well-crystallized mixed crystalline structure 75 anatase - 25 rutile, the urea sample seemed to be a better candidate for photo-catalytic functions.

Keywords

Progress in Color, Colorants and Coatings
Volume 4, Issue 2
August 2011
Pages 85-94

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