Electrospun metal oxide-TiO2 nanofibers for elemental mercury removal from flue gas

► Developed the metal oxides (CuO, In2O3, V2O5, WO3 and Ag2O) doped TiO2 nanofibers. ► The fibers are applied to control Hg0 from coal combustion flue gas. ► WO3 doped TiO2 exhibited the highest Hg0 removal efficiency of 100% under UV irradiation. ► V2O5 doped TiO2 greatly enhanced Hg0 removal under visible light irradiation. ► TiO2-Ag2O showed a steady Hg0 removal efficiency of 95% without any light.