Abstract
CeO 2 nanocrystalline was obtained as a final decomposition product of hydrated cerium carbonate formed by using ammonium bicarbonate as precipitant. The decomposition course of hydrated cerium carbonate and the formation process of CeO 2 were studied by TG and XRD. Moreover, the effect of the dispersant on the dispersity of the CeO 2 powder was studied by SEM. The results show that hydrated cerium carbonate completely decomposes to CeO 2 at 300 °C for 2 h, and the crystallinity increases with increasing calcination temperature. The dispersity of the CeO 2 powder can be improved by the dispersant. For the first time, CeO 2 nanocrystalline was utilized as a photocatalyst for the photocatalytic degradation and decolorization of the dye Acidic Black 10B. The decolorizing rate can reach about 97% under appropriate conditions. Therefore, CeO 2 nanocrystalline possesses photocatalytic activity, and shows promising in dye wastewater treatment.
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