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Fabrication of MOF-177 for electrochemical detection of toxic \(\hbox {Pb}^{2+}\) and \(\hbox {Cd}^{2+}\) ions

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Abstract

We have studied the electrochemical behaviour of room-temperature synthesized MOF-177. The MOF-177 sample was characterized by various techniques like Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray, powder X-ray diffraction, nuclear magnetic resonance and CHNS elemental analysis. The MOF-177 electrode was prepared and electrochemical performance was carried out to explore the electrical activity of MOF-177. Cyclic voltammetry studies were performed in 0.05 M \(\hbox {K}_{4}\hbox {Fe(CN)}_{6}\) solution and electrochemical sensing experiments were performed in 0.05 M \(\hbox {H}_{2}\hbox {SO}_{4}\) and pH 7 buffer solution. A significantly increased electron transfer property has been observed and it has been explored for the electrochemical detection of heavy metal ions. The MOF-177 / cp electrode has shown excellent sensitivity towards toxic heavy metal ions such as \(\hbox {Pb}^{2+}\) and \(\hbox {Cd}^{2+}\) at the limit of detection of 0.004 and 0.03 \(\upmu \hbox {M}\), respectively.

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Authors and Affiliations

  1. Department of Studies in Chemistry, Bangalore University, Jnanabharathi Campus, Bangalore, 560056, India

    S Sangeetha & G Krishnamurthy

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  1. S Sangeetha
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  2. G Krishnamurthy
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Correspondence to G Krishnamurthy.

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Sangeetha, S., Krishnamurthy, G. Fabrication of MOF-177 for electrochemical detection of toxic \(\hbox {Pb}^{2+}\) and \(\hbox {Cd}^{2+}\) ions. Bull Mater Sci 43, 29 (2020). https://doi.org/10.1007/s12034-019-1979-x

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  • DOI: https://doi.org/10.1007/s12034-019-1979-x

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