Abstract
Mesoporous TiO 2 material was synthesized from diblock copolymers with ethylene oxide chains via a sol-gel process in aqueous solution. The properties of these materials were characterized with several analytical techniques including field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), wide angle X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, and Barrett-Joyner-Halenda (BJH) analysis. The mesoporous TiO 2 materials calcined at 400°C were found to have specific surface areas 212 m 2 g -1 , average pore sizes 6.2 nm, and their average crystal sizes were found to be 8.2 nm. The photocatalytic activity of mesoporous Ti0 2 was characterized with UV-Vis spectroscopy, and it was found to be 5.8 times higher than that of Degussa P25 TiO 2 (P25). For deactivation of Escherichia coli, mesoporous Ti0 2 also has high photocatalytic inactivity than that of P25. Such a high photocatalytic activity is explained with large surface area and small crystal size with wormhole-like mesoporous structure.
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