Journal
SN APPLIED SCIENCES
Volume 2, Issue 4, Pages -Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s42452-020-2544-3
Keywords
Sol-gel; TiO2; Nanoparticles; Calcination temperature; Photocatalysis
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In this paper we describe the effect of calcination temperature on the structural, morphological, optical and photocatalytic properties of TiO2 nanoparticles. The titanium dioxide powders were produced by the sol-gel method starting from titanium tetraisopropoxide (TTIP) in neutral aqueous medium (pH 5.5). After that, the TiO2 nanoparticles were treated at three different calcination temperatures for 4 h: 100, 450 and 800 degrees C. Then, the powders were characterized by XRD, Raman and photoluminescence techniques. We observed the anatase phase for the powders treated at 100 and 450 degrees C and rutile for that treated at 800 degrees C. The photocatalytic activity of the TiO2 powders was investigated using Methylene Blue test and showed a strong correlation with the temperature (i.e. TiO2 phase). The better photocatalysis exhibited by the nanoparticles treated at 100 and 450 degrees C compared to the powder at 800 degrees C was due to the higher recombination of photo-generated electrons and holes of rutile with respect to anatase. [GRAPHICS] .
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