CuO and CeO2 assisted Fe2O3/attapulgite catalyst for heterogeneous Fenton-like oxidation of methylene blue

摘要

In this paper, CuO and CeO _(2) were screened as co-catalyst components for Fe _(2) O _(3) /attapulgite (ATP) catalyst, and three new catalysts (CuO–Fe _(2) O _(3) /ATP, CeO _(2) –Fe _(2) O _(3) /ATP and CuO–CeO _(2) –Fe _(2) O _(3) /ATP) were prepared for degradation of methylene blue (MB). The three catalysts' characteristics were determined by BET, XRD, FT-IR, SEM and XPS. MB degradation in different systems and at different pH values was also studied. Under the conditions of H _(2) O _(2) concentration of 4.9 mmol L ~(?1) , catalyst dosage of 5 g L ~(?1) , pH of 5, reaction temperature of 60 °C and MB initial concentration of 100 mg L ~(?1) , the as-synthesized catalysts showed much greater reaction rate and degradation efficiency of MB than Fe _(2) O _(3) /ATP catalyst. In addition, the reusability of the as-prepared composites was evaluated. The intermediate products of MB degradation were identified by LC-MS and the possible degradation process of MB was put forward.