Sonocatalytic performance of Bi2WO6 nanoparticles for degradation of tetracycline antibiotics
Jun Teng, Saisai Xiong, Feng Li, Shubo Wang, Taohai Li
Abstract
In this study, Bi2WO6 nanoparticles have been synthesized successfully via a facile hydrothermal method. The structure and morphology of Bi2WO6 materials were characterized by XRD, SEM, HRTEM, XPS, and UV–vis DRS. The sonocatalytic activities of Bi2WO6 catalysts were placed in a sono-reactor (40 kHz and 200 W) to investigate the degradation of tetracycline antibiotics. The effects of parameters including the ultrasonic power, the catalyst dosage, the initial tetracycline concentration， the pH values and the presence of anions and ions in the environment on the sonocatalytic degradation of tetracycline (TC) were studied to optimize the sonocatalytic performance. Among all samples, sample E3 showed the best sonocatalytic activity (around 97%) on the degradation of TC within 120 min in optimum conditions. A potentially sonocatalytic mechanism was put forward based on the free radical entrapping experiment