Photocatalytic degradation of humic acid with metal-doped TiO2 under near-visible irradiation

초록

The improvement of photocatalytic activity of TiO<inf>2</inf> has been explored. TiO<inf>2</inf> has been doped with some transition metal elements for new photocatalytic materials. They were prepared using nitrates of Fe, Cu and Zn. Their photocatalytic activities were investigated by conducting a semi-batch experiment. The degradation of aqueous humic acid was performed under near-visible irradiation. For examining the photocatalytic characteristics of the new materials, the dissolved organic carbon and the UV254 absorption of humic acid were analyzed. The new metal-doped photocatalysts showed higher photoactivities than the synthesized pure TiO<inf>2</inf>. And photodegradation result of humic acid by the new metal-doped material was even better than by the commercial Degussa P-25 TiO<inf>2</inf> at wavelengths of 315 nm - 400 nm. © 2017 Trans Tech Publications, Switzerland.

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