Nanofibers of TiO2 and TiO2-V2O5 prepared by an electrospinning method were used to remove Hg0 in flue gas

and characterized by SEM

TEM

XRD

BET as well as UV-Vis.The TiO2-V2O5 nanofiber is of anatase phase structure and V2O5 is highly dispersed in the fiber.Its average diameter is around 200 nm.The fiber is composed of a large number of nanoparticles with diameter around 10 nm. Compared with pure TiO2

UV-Vis absorption intensity of TiO2-V2O5 significantly increases and its absorption bandwidth also broadens.The mercury removal efficiencies under various illuminations

the optimum doping content of V2O5 as well as the capabilities to oxidize Hg0 for 8 cycles were also tested.In addition

mechanism analysis was used to reveal photocatalytic activity enhancement of TiO2-V2O5 nanofibers.The result shows that 66% of Hg0 removal efficiency can be reached under visible irradiation at the sample with 3% V2O5 doping

and much higher than 7% for pure TiO2.After eight cycles

Hg0 removal efficiencies over TiO2-V2O5 still remain stable at 80% and 65% under UV and visible light respectively

indicating that this fiber catalyst could be used for long time.The increase of photocatalytic activity under visible light could be attributed to its electron transition and better photoelectron-hole separation.