Abstract
In this paper reports a facile hydrothermal synthesis, characterization and sensing application of zinc oxide (ZnO) nanostructures. ZnO nanostructures were synthesized by mixing triethylamine (TEA) with zinc nitrate at 60 °C followed by calcination at 650 °C for 6 h. The detailed characterizations conformed the synthesized ZnO nanostructures. Powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Raman spectral analysis confirmed the formation of hexagonal ZnO. Band gap of the ZnO nanoparticles was determined by UV–visible absorption spectroscopy. Morphology and size of the sample was examined by field emission scanning electron microscopy (FE-SEM) and high resolution transmission electron microscopy (HR-TEM). It shows that the sample has rod and hexagonal morphology. Elemental composition was determined by energy dispersive X-ray (EDX) spectroscopy. The ZnO was coated on glassy carbon electrode (ZnO/GCE) and it was utilized as an electrochemical sensor for 4-nitrophenol (4-Np). Sensitivity and detection limit of ZnO/GCE towards 4-Np was found to be 0.04 µA/mM and 2.09 × 10−5 M. The result suggests that ZnO has suitable sensor detection of 4-Np.
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Acknowledgements
The work is partially supported by Dr. A. Saravanakumar (PSG Hospitals, Coimbatore) and Dr. S. Poongodi (PSGR Krishnammal College for Women, Coimbatore). The FE-SEM image was taken with the help of NRC from SRM University, Chennai.
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Santhoshkumar, A., Kavitha, H.P., Suresh, R. et al. ZnO nanoparticles: hydrothermal synthesis and 4-nitrophenol sensing property. J Mater Sci: Mater Electron 28, 9272–9278 (2017). https://doi.org/10.1007/s10854-017-6663-6
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DOI: https://doi.org/10.1007/s10854-017-6663-6