Journal of Photochemistry and Photobiology A Chemistry · 2023 · 17 citations · 59 references
• The highest photocatalytic efficiency was calculated as 82% for the CeO 2 :0.1Nd compound in MB dyestuff. • CeO 2 :0.05Nd0.05 M(Dy,Sm,Tb) compounds selected by co-doping method had the highest catalytic efficiency in CeO 2 :0.05Nd0.05Dy and 60.96% for methylene blue. • It was determined that the degradation of RhB , which has a complex and large structure, was the lowest in the selected dye molecules. • Photoluminescence properties Nd-CeO 2 , Sm-Nd-CeO 2 and Dy-Nd-CeO 2 exhibit blue, green and red emisson bands and very good luminescence properties for w-LEDs and opto-electronic applications. This study examined the effect of different dope types to contribute for the photochemical application area of the CeO 2 compound. In addition, the photocatalyst properties of binary and ternary compounds, which vary with the molecular structure of dye species, were reported. For. this purpose, undoped-CeO 2 . CeO 2 :0.1Nd and CeO 2 :0.05Nd0.05 M(Dy,Sm,Tb) compounds were synthesized by a semi-process room temperature(SPRT) method. In characterization studies, X-ray powder diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR), Raman, ultraviolet–visible spectroscopy (UV–vis), and photoluminescence spectroscopy (PL) were used. The secondary phase was observed with a 0.05 Tb contribution. The cubic crystal structure was obtained in other compounds. The lowest optical band gap was determined as 2.60 eV in CeO 2 :0.1Nd compound. In photocatalyst studies, methylene blue(MB), malachite green (MG), and rhodamine-B(RhB) dyes were used. It was observed that the photocatalytic efficiency decreased as the molecular size increased. The highest catalytic efficiency was calculated as 82% for the CeO 2 :0.1Nd compound for methylene blue. The PL results determined that the doping of Nd 3+ , Sm 3+ , Dy 3+ , and Tb 3+ ions played an important role in developing blue, green, and red emission bands for the photoluminescence of CeO 2 .
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