Photocatalytic degradation mechanisms of CeO2/Tb2O3 nanotubes

Arul, Narayanasamy Sabari; Mangalaraj, Devanesan; Kim, Tae Whan

doi:10.1016/j.apsusc.2015.04.206

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Photocatalytic degradation mechanisms of CeO2/Tb2O3 nanotubes

Arul, Narayanasamy Sabari;
Mangalaraj, Devanesan;
Kim, Tae Whan

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42

초록

CeO2/Tb2O3 nanotubes (NTs) have been synthesized using the surfactant free co-precipitation method. High resolution transmission electron microscopy (HRTEM) images, X-ray spectroscopy (XPS) spectra, and energy dispersive X-ray (EDAX) profiles showed that the as-synthesized samples were CeO2/Tb2O3 NTs. The photocatalytic activity of the synthesized catalysts was evaluated by degrading Methylene blue (MB) under visible light irradiation. The fitting of the absorbance maximum as a function of time showed that the photodegradation of the MB followed pseudo-first-order reaction kinetics. The estimated rate constants for the CeO2 NPs and the CeO2/Tb2O3 NTs were found to be 0.0134 and 0.0317 min(-1), respectively. The photodegradation efficiency of CeO2/Tb2O3 nanotubes was 93% after 75 min, which was found to be higher than those of CeO2 NPs (66%).

키워드

CeO2/Tb2O3; Nanotubes; Transmission electron microscopy; Methylene Blue; Photocatalyst; ONE-DIMENSIONAL CEO2; DOPED CEO2; CERIA; NANOPARTICLES; COMPOSITES; OXIDATION; FILMS

제목: Photocatalytic degradation mechanisms of CeO2/Tb2O3 nanotubes

저자: Arul, Narayanasamy Sabari; Mangalaraj, Devanesan; Kim, Tae Whan

DOI: 10.1016/j.apsusc.2015.04.206

발행일: 2015-09

유형: Article

저널명: Applied Surface Science

권: 349

페이지: 459 ~ 464