One-dimensional Bi2MoO6 nanosheets/TiO2 hollow tubes:Controllable synthesis and enhanced visible photocatalytic activity

Abstract

By electrostatic spinning technology combined with solvothermal method, Bi2MoO6 nanosheets were loaded on TiO2 hollow tubes, and Bi2MoO6/TiO2 nanocomposite photocatalytic materials were successfully prepared. The products were characterized by scanning electron microscopy (SEM), Transmission electron microscopy (TEM),X-ray diffraction (XRD), ultraviolet–visible spectroscopy (UV–vis) and photoluminescence spectroscopy (PL). The results show that the lamellar Bi2MoO6 nanostructures were successfully grown on TiO2 hollow tubes. The photocatalytic experiments showed that the Bi2MoO6/TiO2 nanocomposites exhibited higher visible light photocatalytic activity than both pure TiO2 and pure Bi2MoO6, which may be due to the effective photogenerated electron-hole separation generated by the Bi2MoO6/TiO2 heterojunction, the photocatalytic degradation of detetracycline, doxycycline and aureomycin by Bi2MoO6/TiO2 photocatalytic system was also compared. In addition, the Bi2MoO6/TiO2 photocatalyst maintained good photocatalytic performance after five cycles, and it was demonstrated by the capture experiments that the superoxide radical played a dominant role in the photocatalytic degradation process, and the contributions of light-generated holes and hydroxyl radicals were approximately the same, and the possible mechanism of its photocatalytic system was proposed.