Preparation Of TiO₂/Bi₂O₃/C Composite Fibers By Electrospinning And Their Properties Study

Photocatalysis is one of the most effective way to remove water pollution.It has the advantages of low cost and simple operation.At present,many oxides are used as photocatalysis.Electrospinning is a new method to prepare nanofibers.Electrospinning has outstanding advantages:there are many kinds of spinnable materials and the prepared fibers have high porosity.At present,many kinds of nanofibers have been successfully prepared by electrospinning technology.These nanofibers have unique structure and superior properties,thus it is vital to explore their feasible application area.In this paper,tetrabutyl titanate was used as titanium source.and the PVP was used as template.What's more,spinning precursor was successful prepared by formulating hydroysis solution of tetrabutyl titanate and DMF solution of PVP.Different ratios of TiO₂/Bi₂O₃/C were successfully prepared by high-voltage electrospinning method and high-temperature calcination.The main compositions of the fibers prepared under fast air flow condition are bismuth titanate,amorphous titanium dioxide and elemental carbon while the main compositions of the fibers prepared under slow air flow condition are amorphous titanium dioxide bismuth first-order elemental carbon.The thermal stability,hydrophobicity,photocatalytic and electrocatalytic properties of the composite fibers were tested.The results showed that the composite fibers were ultraviolet-responsive,and the removal rate of methyl orange exceeded 90%after 4 hours.Combining the flexibility and stability of composite fibers,it can be used as photocatalytic materials.