Study on heterogeneous visible-light photo-Fenton degradation of Rhodamine B

Heterogeneous visible light photon-Fenton catalyst,BiFeO3,was successfully prepared by sol-gel method.Its phase micro-morphology was characterized by X-ray diffraction(XRD),scanning electron microscope(SEM) and UV-vis absorbance spectra separately.Performance of heterogeneous visible light photon-Fenton system for Rhodamine B degradation was investigated;it was found that Rhodamine B could be completely decomposed in 2.50 h visible light irradiation by BiFeO3-H2O2,which confirmed that BiFeO3 was an efficient visible light heterogeneous photo-Fenton catalyst.Four de-ethylation products were discovered by liquid chromatography-mass spectrometry(LC-MS) method,the possible photodegradation pathway of Rhodamine B in visible light-BiFeO3-H2O2 system was gradual de-ethylation.