Hazardous methylene blue dye and As(iii) ions from wastewater are removed by the rGO and TiO2/Fe3O4 based binary and ternary nanocomposites, where ternary rGO–Fe3O4–TiO2 nanocomposite provides maximum degradation and adsorption of the pollutants.

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Hazardous methylene blue dye from wastewater can be removed by a Zn–Mn co-doped photocatalyst under a very low power irradiation source, where 1.0 at% Zn, Mn doped TiO2 provides the maximum degradation of this pollutant.

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