Synthesis, Structural, Optical and Photocatalytic Studies of Nanostructured Cadmium Doped ZnO Nanorods by Hydrothermal Method

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P. Logamani, G. Poongodi, R. Rajeswari (2017). Synthesis, Structural, Optical and Photocatalytic Studies of Nanostructured Cadmium Doped ZnO Nanorods by Hydrothermal MethodMechanics, Materials Science & Engineering, Vol 10. doi:10.2412/mmse.37.62.535

Authors: P. Logamani, G. Poongodi, R. Rajeswari

ABSTRACT. Nowadays, considerable attention has been paid to the eradication of hazardous substances in the environment especially in the wastewater. The photocatalytic reaction is used to mineralize the hazardous recalcitrant pollutants in to simple and harmless compounds and has been enhanced by the application of nanoparticles. Zinc oxide (ZnO) is a nontoxic wide band gap semiconductor photocatalyst, having unique properties such as high mobility, excellent chemical and thermal stability, high transparency and biocompatibility. To enhance its photocatalytic activity in the visible region ZnO can be doped with metals and non-metals. In the present work, pure and cadmium doped ZnO nanorods were prepared by hydrothermal method and characterized by X-ray diffraction, field-emission scanning electron microscopy with EDAX and UV–Vis spectroscopy. The XRD results showed that the grown nanorods were well crystalline with hexagonal wurtzite structure. FESEM images confirm the nanorod structure. UV-Vis transmission spectra show that the substitution of Cd in ZnO leads to band gap reduction. The Cd doped ZnO nanorods were found to exhibit improved photocatalytic activity for the degradation of methylene blue dye under visible light in comparison with the undoped ZnO.

Keywords: cadmium doped ZnO, nanorods, hydrothermal method, FESEM

DOI 10.2412/mmse.37.62.535

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