UV-Fenton Discoloration of Methyl Orange Using Fe₃O₄/MWCNTs as Heterogeneous Catalyst Obtained by an In Situ Strategy

Abstract:

As an innovative heterogeneous UV-Fenton catalyst nanocomposite, ferroferric oxide (Fe₃O₄) with inverse-spinel structure trapped by Multi-walled carbon nanotubes (MWCNTs) was successfully prepared by a facile and in-suit strategy in this study. The as-prepared products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the UV-Fenton efficiency of Fe₃O₄/MWCNTs nanocomposite. The effects of operating parameters, including solution pH, initial MO concentration, reaction temperature, initial H₂O₂ concentration and catalyst dosage on MO discoloration were detailedly investigated. Control experiments indicated Fe₃O₄/MWCNTs exhibited higher ability for MO discoloration than bare Fe₃O₄ under the same experimental conditions, which might be attributed to the synergetic effect between Fe₃O₄ and MWCNTs.

• Periodical: Applied Mechanics and Materials (Volume 618)
• Pages: 208-214
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.618.208
• Online since: August 2014
• Authors: Tian Nuo Shi, Huan Yan Xu*, Hong Zhou Chang
• Keywords: Discoloration, Fe₃O₄/MWCNTs Composite, Heterogeneous UV-Fenton, Methyl Orange

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