کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
151820 | 456481 | 2010 | 9 صفحه PDF | دانلود رایگان |

La2O3/Ag3VO4 samples were synthesized by impregnation process and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The XRD, SEM–EDS and XPS analyses revealed that La3+ was dispersed on Ag3VO4 in the form of La2O3 cluster. The DRS results indicated that the absorption edge of the La3+–Ag3VO4 catalyst shifted to longer wavelength. The enhanced photocatalytic activity of La2O3/Ag3VO4 for Rhodamine B (RhB) dye degradation under visible light irradiation was due to its wider absorption edge and higher separation rate of photo-generated electron and holes. The highest photodegradation efficiency was obtained when the La2O3/Ag3VO4 catalyst was calcined at 300 °C with 3 wt% La content. The photocatalytic degradation intermediates of the solution were identified by LC/MS.
Journal: Chemical Engineering Journal - Volume 160, Issue 1, 15 May 2010, Pages 33–41