In Situ Construction of WO3/Bi2WO6 Heterogeneous Materials for Advanced Photocatalytic Activity in Degradation of Tetracycline

The composite photocatalyst composed of WO 3 and Bi 2 WO 6 can play the synergistic effect between the two individual components. Herein, a WO 3 /Bi 2 WO 6 heterogeneous material with high quality interface has been synthesized via situ growing Bi 2 WO 6 directly on the surface of WO 3 nanoplates. The photocatalytic degradation efficiency of tetracycline (TC) for BWO-3 reaches ≈92%, which is much higher than that of WO 3 (≈27%) due to the coupling effect of WO 3 and Bi 2 WO 6 . Electrochemical impedance and photocurrent measurements prove that WO 3 /Bi 2 WO 6 heterogeneous material has decreased carriers’ transfer resistance and higher photocurrent density, which endows its improved photocatalytic performance. Also, the radical trapping experiment proves that superoxide radical has great impacts on the degradation of TC. This work provides an efficient method for developing photocatalysts with excellent performance.