Journal
JOURNAL OF RARE EARTHS
Volume 32, Issue 4, Pages 306-313Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(14)60072-7
Keywords
zinc oxide; rare earths; europium; nanorods; microwave; dye degradation
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Funding
- University Grants Commission (UGC), New Delhi, India [37- 335/2009(SR)]
- Department of Science and Technology (DST) of India [SR/S1/PC/0041/2010]
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The doped ZnO nanorods as a photocatalyst with different Eu contents were prepared by microwave assisted method and they were characterized by means of X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), UV-Vis spectroscopy, surface area Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The average crystallite size and band gap energy of Eu-doped ZnO were varied with the Eu content. The XRD pattern of Eu-doped ZnO indicated hexagonal crystal structure with an average crystallite size of 25 nm. The presence of europium with trivalent state and its doping successfully into the crystal lattice of ZnO matrix were confirmed by XPS technique. The photocatalytic activity of Eu-doped ZnO nanorods was evaluated for methyl orange degradation. The photocatalytic experiments showed similar to 91% degradation of methyl orange over 0.2 mol.% Eu doped ZnO sample within 3 h under UV light (365 nm).
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