Regular ArticleDelta manganese dioxide nanosheets decorated magnesium wire for the degradation of methyl orange

•Manganese dioxide decorated magnesium wire to form a hierarchical structure.•A novel supported material to form MnO2-M for the degradation of methyl orange.•High degradation performance for MO: a high removal rate of 76% in 2 h.•Good stability.

MnO2-decorated magnesium wire composite (MnO2-M) was fabricated via a simple hydrothermal reaction and accompanied by the calcination process (MnO2/Mn3O4-M). To clarify the optimized reaction condition of δ-MnO2 in the system, the effect of different pH, temperature and pollutant concentration of methyl orange (MO) for degradation process were investigated. Experimental results showed that MnO2-M achieves a high removal rate of 76% (2 h, at 25 °C) in the presence of H2O2 at pH 2.5, which is higher than that of MnO2/Mn3O4-M (54%). Moreover, reaction temperature and MO dye concentration have little effect on the degradation performance of MnO2-M. This implies the stability of the as-prepared samples and good potential in the application of wastewater treatment.

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