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Catalytic activity of CuMnFeO/multi-walled carbon nanotubes (0 ≤ x ≤ 0.1) nanocomposites for p-nitrophenol degradation in catalyst/HO system.

08:00 EDT 1st June 2019 | BioPortfolio

Summary of "Catalytic activity of CuMnFeO/multi-walled carbon nanotubes (0 ≤ x ≤ 0.1) nanocomposites for p-nitrophenol degradation in catalyst/HO system."

Heterogeneous Fenton oxidation has become a very important wastewater-treatment method and its catalyst is crucial for good treatment effect. In order to improve the catalytic properties, the Cu and Mn elements were doped for CuMnFeO/multi-walled carbon nanotubes (CuMnFeO/MWCNTs) nanocomposites (0 ≤ x ≤ 0.1) by co-precipitation method. The structure, morphology and surface properties of the nanocomposites were characterized by X-ray powder diffractometer (XRD), N-physisorption analysis, transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). The CuMnFeO/MWCNTs nanocomposites were used as heterogeneous Fenton catalysts for p-nitrophenol (p-NP) degradation. The catalytic performances of the Cu and/or Mn doped nanocomposites have remarkable improvement compared with FeO/MWCNTs nanocomposite, especially for both Cu and Mn doped catalyst. For CuMnFeO/MWCNTs nanocomposites, the catalytic performance increases with increasing x value and reaches a maximum at 0.075 of x value. At optimal condition, the p-NP conversion rate reaches 96.4% in 10 min for CuMnFeO/MWCNTs nanocomposite. However, the mentioned rate for FeO/MWCNTs catalyst is only 14.5%. The chemical oxygen demand (COD) removal rates in 120 min for CuMnFeO/MWCNTs and FeO/MWCNTs catalysts are 82.7% and 67.3%, respectively. Furthermore, the p-NP conversion and COD removal rates of CuMnFeO/MWCNTs nanocomposite still keep at 94.4% and 70.3% after five-time reuse, respectively. This catalyst shows good reusability for p-NP degradation and is very easy to recover from the treated water.

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Journal Details

This article was published in the following journal.

Name: Water science and technology : a journal of the International Association on Water Pollution Research
ISSN: 0273-1223
Pages: 2345-2356

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