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Effect of morphology in the photocatalytic degradation of methyl violet dye using ZnO nanorods

Research paper by J. Prince Richard, I. Kartharinal Punithavathy, S. Johnson Jeyakumar, M. Jothibas, P. Praveen

Indexed on: 14 Nov '16Published on: 14 Nov '16Published in: Journal of Materials Science: Materials in Electronics



Abstract

In the present work, high purity ZnO nanorods were synthesized by solid state reaction method at different annealing temperatures (250–400 °C). The structural, morphological and optical characteristic of the ZnO nanorods were studied. X-ray diffraction results confirmed that the ZnO nanorods have Wurtzite structure with high crystal quality. The grain size has increased from 23 to 27 nm with increasing temperature. The scanning electron microscopy and high resolution-transmission electron microscopy photographs showed the formation of ZnO nanorods. The bonding natures of the synthesized nanorods were analyzed by Fourier transform infra-red spectroscopy. The blue shift in the absorption edge was observed from the UV–Vis spectrum. The photoluminescence spectra showed two emission peaks corresponding to blue and red emissions. The photocatalytic performance of these nanorods was evaluated using methyl violet dye. The result showed that photocatalytic performance is highly depends on the morphology of the nanorods.