An electrochemical sensor based on Pt/g-C3N4/polyaniline nanocomposite for detection of Hg2+
The synthesis of Pt/g-C3N4/polyaniline nanocomposites (Pt/g-C3N4/PAn NCs) via the direct reduction of Pt (II) in the presence of L-cysteine as the reducing agent is presented in this study. X-ray diffraction analysis showed that the Pt cations were reduced to metallic Pt in the presence of L-cystein...
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| Main Authors: | , , , , |
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| Format: | Article |
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Elsevier
2020
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/36521/ |
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| Summary: | The synthesis of Pt/g-C3N4/polyaniline nanocomposites (Pt/g-C3N4/PAn NCs) via the direct reduction of Pt (II) in the presence of L-cysteine as the reducing agent is presented in this study. X-ray diffraction analysis showed that the Pt cations were reduced to metallic Pt in the presence of L-cysteine. Field emission scanning electron microscope images confirmed a low agglomeration of metallic Pt when synthesized in the presence of g-C3N4. Electrochemical impedance spectroscopy results showed that the low conductivity of g-C3N4 is compensated with the presence of polyaniline (PAn). A glassy carbon electrode modified with the Pt/g-C3N4/PAn NCs showed high selectivity and sensitivity for the detection of Hg2+. The presence of active sites in the g-C3N4 and PAn enhanced the adsorption of Hg2+. The voltammetric response was linear in the concentration range of 1-500 nM Hg2+, with the detection limit of 0.014 nM (at S/N = 3). (C) 2020 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved. |
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