Abstract
In order to improve the catalytic properties of Fe3O4 nanoparticles in wastewater treatment, the Cu-doped Fe3O4/graphene oxide (Fe3−xCuxO4/GO) nanocomposites were prepared by a modified co-precipitation method and used as heterogeneous catalyst for p-Nitrophenol (p-NP) degradation. The effect of the GO and Cu contents in the nanocomposites was investigated. Compared with the unsupported Fe3O4 nanoparticles, the Fe3O4/GO nanocomposites have obviously improved catalytic performance, especially for the nanocomposite with 6.25 wt.% of the GO content. Furthermore, the catalytic efficiency is greatly improved by doping Cu in the nanocomposite. The Fe3−xCuxO4/GO nanocomposite achieves the best catalytic property in our catalyst system when the x value is about 0.075. Under the optimal reaction condition (0.8 g L−1 of catalyst dosage, 15 mmol L−1 of initial H2O2 concentration, 3.0 of pH value, and 30 °C of temperature), the p-NP conversion and chemical oxygen demand removal efficiencies in 120 min for the Fe2.925Cu0.075O4/GO nanocomposite are about 98.4% and 74.7%, respectively. And the p-NP conversion efficiency is still as high as 96.2% after four recycles under the optimum condition. The results clearly show that the Fe2.925Cu0.075O4/GO nanocomposite has outstanding catalytic properties for the p-NP degradation.
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This study is financially supported by the National Natural Science Foundation of China (Grant Nos. 21174011 and U1462102).
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Liu, M., Jia, Z., Li, P. et al. High Catalytic Activity of Fe3−xCuxO4/Graphene Oxide (0 ≤ x ≤ 0.1) Nanocomposites as Heterogeneous Fenton Catalysts for p-Nitrophenol Degradation. Water Air Soil Pollut 230, 64 (2019). https://doi.org/10.1007/s11270-019-4121-1
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DOI: https://doi.org/10.1007/s11270-019-4121-1