Synthesis, Characterization, and Photocatalytic Properties of Flower-like Mn-doped Ceria

Pei Li, Wei Zhang, Xun Zhang, Zhengde Wang, Xianpeng Wang, Songlin Ran, Yaohui Lv
2018 Materials Research  
Mn-doped CeO 2 flower-like microstructures have been synthesized by a facile one-step compositehydroxide-mediated method. The structure, morphology, optical and the surface properties of Mn doped CeO 2 have been investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), UV-Vis absorption spectroscopy and X-ray photoelectron spectroscopy (XPS). The XRD results confirmed the successful incorporation of Mn into the CeO 2 lattice through the formation of
more » ... mation of face-centered cubic solid solution. The photocatalytic activities of the catalysts were evaluated by measuring the photodegradation efficiency of Rhodamine B (RhB) under ultraviolet light irradiation. With an optimal molar ratio of 1% in Mn/CeO 2 the highest rate photodegradation was achieved under the experimental conditions. The enhanced photocatalytic activity can be attributed to the incorporation of multivalent Mn in CeO 2 promoted the separation of photogenerated charges, inhibited the recombination of photogenerated carriers, and thus prolonged the charges lifetime to participate in the photocatalytic reaction.
doi:10.1590/1980-5373-mr-2018-0167 fatcat:vrujeayuefactaimma6eru4vf4