J. Mater. Sci. Technol. ›› 2020, Vol. 52: 145-151.DOI: 10.1016/j.jmst.2020.03.027

• Research Article • Previous Articles     Next Articles

S-scheme photocatalyst Bi2O3/TiO2 nanofiber with improved photocatalytic performance

Rongan Hea, Haijuan Liua, Huimin Liua, Difa Xua(), Liuyang Zhangb()   

  1. a Hunan Province Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
    b State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Received:2019-12-25 Revised:2020-01-13 Accepted:2020-01-15 Published:2020-09-15 Online:2020-09-18
  • Contact: Difa Xu,Liuyang Zhang

Abstract:

In this study, a hierarchical Bi2O3/TiO2 fibrous composite was in-situ fabricated on an electrospun TiO2 nanofiber at ambient temperature. In the Bi2O3/TiO2 composite, S-scheme electron migration occurred between Bi2O3 and TiO2. In the photocatalytic degradation of phenol under simulated sunlight, the as-prepared Bi2O3/TiO2 nanofibers considerably outperformed Bi2O3 nanoparticles and TiO2 nanofibers. This improvement is contributed by maintaining and effectively utilizing the useful carriers and consuming the useless holes and electrons, realized by the S-scheme heterojunction and hierarchical structure. This study also provides an alternative design fashion for photocatalysts.

Key words: Electrospinning, Bismuth, Fiber, In-situ synthesis