Journal
DESALINATION AND WATER TREATMENT
Volume 57, Issue 31, Pages 14647-14655Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/19443994.2015.1076738
Keywords
Dye removal; Photocatalysis; TiO2-SiO2 nanocomposites; TiO2 nanoparticles; Sol-gel method
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Introduction of complex chemical compounds in the wastewater treatment plants challenged the biological process efficiency. Photocatalyst oxidation was newly introduced to remove the trace organic contaminations. Since their surface area determined the production of hydroxyl radicals, the pure TiO2 surface area was increased by the preparation of TiO2-SiO2 nanocomposite using sol-gel technique. Later on, the X-ray diffraction, scanning electron microscopy, energy diffraction spectroscopy, Fourier transform infrared spectroscopy, UV-vis reflective dispersion spectroscopy, and adsorption of nitrogen gas were deployed for its characterization. Anatase phase was detected as the dominant form of nanocomposites made in this study. Furthermore, rise of calcination temperature, increased the nanoparticle pore size. Therefore, 600 degrees C was selected to gain the optimum nanoparticle pore size (around 10nm). Finally, the photocatalytic activities of the synthesized nanoparticles were evaluated for removing Acid Blue 9 (AB9) dye. The photocatalytic performance of the most optimized ratio TiO2-SiO2 nanocomposites was three times higher than that of pure TiO2 and even commercial nanoparticle.
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