摘要：The Fenton-like activity of nanoceria has attracted intensive attention for wastewater treatment in recent years. During the Fenton-like reaction, the adsorption of organic pollutants on catalyst surface plays a key role in their degradation. In this work, the adsorption-degradation of methylene blue (MB) and Congo red (CR) in nanoceria/H 2 O 2 system was investigated under alkaline conditions. The MB exhibited weak adsorption on nanoceria surface via electrostatic attraction, while strong Lewis acid-base interactions between CR and cerium ions was observed. Moreover, the adsorption of MB was enhanced in the presence of H 2 O 2 by the formation of surface peroxide species, but an adsorption competition existed between H 2 O 2 and CR. With more Ce 3+ , CeO 2 nanorods could degrade CR efficiently as Fenton-like catalyst. But the degradation of MB catalyzed by ceria was much lower than that of CR in the presence of H 2 O 2 .
