HYDROTHERMAL SYNTHESIS AND VISIBLE-LIGHT-DRIVEN PHOTODEGRADATION OF ANTIBIOTICS OF BI2WO6 NANOSTRUCTURES

摘要

Antibiotics, as emerging persistent organic pollutant, have increasingly attracted worldwide concerns in recent years due to its potential toxicity. We have successfully synthesized Bi2WO6 with two different morphologies, namely sheet-like and flower-like, via a simple hydrothermal method. Two different morphologies Bi2WO6 have been characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectrometer analysis. A series of contrast experiments (including the amount of Na2WO4 center dot 2H(2)O, the amount of ethylenediamine and reaction temperature) were carried out to understand the relation between reaction parameters and the formation of Bi2WO6 morphologies. Four kinds of antibiotics (Tetracycline, Oxytetracyline, Doxycycline and Ciprofloxacin) were degraded by two morphologies Bi2WO6. Based on experimental results, the flower-like Bi2WO6 nanostructures showed the higher activity for these four antibiotics decomposition than the sheet-like nanostructures. Moreover, we have found that it has better photocatalytic effect in the degradation of Tetracycline.