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

• Published in: Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2018-07, Vol.21 (5), p.1
• Main Authors: Li, Pei, Zhang, Wei, Zhang, Xun, Wang, Zhengde, Wang, Xianpeng, Ran, Songlin, Lv, Yaohui
• Format: Article
• Language: English
• Subjects: Catalytic activity; Cerium oxide; Cerium oxides; Cubic lattice; Emission analysis; ENGINEERING, CHEMICAL; Light irradiation; Manganese doped; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; Morphology; Optical properties; Photocatalysis; Photodegradation; Rhodamine; Scanning electron microscopy; Solid solutions; Spectrum analysis; Surface properties; Ultraviolet radiation; X ray photoelectron spectroscopy; X-ray diffraction
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/1980-5373-mr-2018-0167

Mn-doped CeO2 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 CeO2 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 CeO2 lattice through the formation 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/CeO2 the highest rate photodegradation was achieved under the experimental conditions. The enhanced photocatalytic activity can be attributed to the incorporation of multivalent Mn in CeO2 promoted the separation of photogenerated charges, inhibited the recombination of photogenerated carriers, and thus prolonged the charges lifetime to participate in the photocatalytic reaction.