Novel Bi WO -coupled Fe O Magnetic Photocatalysts: Preparation, Characterization and Photodegradation of Tetracycline Hydrochloride.

Novel Bi WO -coupled Fe O magnetic photocatalysts with excellent and stable photocatalytic activity for degrading tetracycline hydrochloride and RhB were successfully synthesized via a facile solvothermal route. Through the characterization of the as-prepared magnetic photocatalysts by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectra, it was found that the as-prepared magnetic photocatalysts were synthesized by the coupling of Bi WO and Fe O , and introduction of appropriated Fe O can improve nanospheres morphology and visible-light response. Among them, BFe2 (0.16% Fe O ) exhibited the best photocatalytic activity for degradation of tetracycline hydrochloride (TCH), reaching 81.53% after 90 min. Meanwhile, the as-prepared magnetic photocatalysts showed great separation and recycle property. Moreover, the results of electrochemical impedance spectroscopy demonstrated that the well conductivity of Fe O can promote photogenerated charge carriers transfer and inhibit recombination of electron-hole pairs, so that Bi WO /Fe O exhibited enhanced photocatalytic activity on degradation of TCH and RhB. Hence, this work provides a principle method to synthesize Bi WO /Fe O with excellent photocatalytic performance for actual application, in addition, it showed that introduction of Fe O not only can provide magnetism, but also can enhance photocatalytic activity of Bi WO /Fe O magnetic photocatalysts.