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In comparison with photocatalytic process, the catalytic degradation of organic dye pollutants in no need of light irradiation is highly interesting from the energy-saving point of view. In this paper, we developed a new CeGeO 4 catalyst that can satisfy the energy-saving requirements in this regard. During the synthesis of CeGeO 4 , the influence of synthetic medium pH, the kind of precursor, etc., on the formation of crystalline CeGeO 4 was investigated in detail. Importantly, the CeGeO 4 catalyst exhibited significantly higher performance than that of CeGeO 4 /CeO 2 or CeO 2 in degradation of rhodamine B (RhB) or methylene blue (MB) in the dark at room temperature. [ABSTRACT FROM AUTHOR]