Behavior of Bi2S3 under ultrasound irradiation for Rhodamine B dye degradation

In this study, we have demonstrated that Bi2S3 semiconductor under ultrasound behaves as a piezoelectric material, facilitating the transfer of electrons and holes, thus enabling the formation of oxidizing agents. In the presence of light, Bi2S3 showed no photocatalytic activity, resulting in Rhodamine B (RhB) degradation of 2.5%, while the ultrasound application led to a degradation of 40.6%. Herein, we propose a possible mechanism to explain this behavior based on the local charge polarization in [BiS7] clusters.

Automated summary

The study demonstrated that Bi2S3 semiconductor behaves as a piezoelectric material under ultrasound, facilitating electron and hole transfer and enabling the formation of oxidizing agents. While Bi2S3 showed no photocatalytic activity in the presence of light, ultrasound led to a significant increase in RhB degradation.