Enhanced photocatalytic activity of cobalt-doped CeO2 nanorods
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In this paper, CeO2 and cobalt-doped CeO2 nanorods synthesized by surfactant free co-precipitation method. The microstructures of the synthesized products were characterized by XRD, FESEM and TEM. The structural properties of the grown nanorods have been investigated using electron diffraction and X-ray diffraction. High resolution transmission electron microscopy studies show the polycrystalline nature of the Co-doped cerium oxide nanorods with a length of about 300 nm and a diameter of about 10 nm were produced. The X-ray Photoelectron spectrum confirms the presence of cobalt in cerium oxide nanorods. From BET, the specific surface area of the CeO2 (Co-doped) nanostructures (131 m2 g−1) is found to be significantly higher than that of pure CeO2 (52 m2 g−1). The Co-doped cerium nanorods exhibit an excellent photocatalytic performance in rapidly degrading azodyes acid orange 7 (AO7) in aqueous solution under UV illumination.
KeywordsCo-doped CeO2 nanorods Chemical synthesis Surface area Photocatalytic properties AZO dyes
One of the authors NSA would like to thank Lunghwa University for offering Internship program, Mr. Shun Cho and Ms. Koug Chen for their help in doing FESEM and Mr. Chih-Hua Yu for helping to perform TEM measurements.