Abstract
Optically transparent, crack‐free mesoporous titania and zirconia‐doped titania thin film photocatalysts were fabricated by sol‐gel technique, using nonionic amphiphilic block copolymer Pluronic P123 as template. The structural and optical properties of these films were characterized using SEM, low‐angle XRD, and UV/Vis spectroscopy, hexane adsorption investigation. Band gap energy and the position of flatband potentials were estimated by photoelectrochemical measurements. Enhancing of photocatalytic activity of zirconia‐doped films relative to pure TiO2 originates from an anodic shift of the valence band edge potential. Catalytic activity of mesoporous TiO2 and TiO2/ZrO2 (5–50% of ZrO2) films in the processes of CrVI to CrIII photoreduction and 2,4‐dinitroaniline photooxidation correlates with crystalline size and growth with increasing of specific surface area of the samples.
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