The contribution of vanadium and titanium on improving methylene blue decolorization through heterogeneous UV-Fenton reaction catalyzed by their co-doped magnetite

► Ti-V co-doped magnetite has strong catalytic activity in UV-Fenton reaction. ► Ti4+ is more positive to adsorption and catalytic activity of magnetite than V3+. ► Mechanism of substitution increasing the adsorption and catalytic activity. ► The obtained results are benefit for application of magnetite in treating wastewater.