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1 Physicochemical Problems of Mineral Processing

1 2012

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Preparation and photocatalytic activity of iron- modified titanium dioxide photocatalyst

Lezner M., Grabowska E., Zaleska A.

Physicochemical Problems of Mineral Processing

2012

Vol. 48, iss. 1

193-200

Iron modified TiO2 was prepared by the sol-gel method and surface modification method followed by calcination at 400°C. Two types of titanium dioxide: TiO2 ST-01(Ishihara Sangyo Ltd., Japan;300 m2/g), and TiO2 P25 (Evonik, Germany, 50 m2/g) were used in the grinding procedure. The photocatalysts were characterized by UV-VIS absorption and BET surface area measurements. The photocatalytic activity of the obtained powders in UV-Vis and visible light was estimated by measuring the decomposition rate of phenol (0.21 mmol/dm3) in an aqueous solution. The best photoactivity under visible light was observed for iron doped TiO2 with 0.5% by grinding the TiO2 ST-01.