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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ahuja, Tripti
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Publications (3/3 displayed)
- 2021Cellulosic Ternary Nanocomposite for Affordable and Sustainable Fluoride Removalcitations
- 2019Highly Sensitive As3+ Detection Using Electrodeposited Nanostructured MnO x and Phase Evolution of the Active Material during Sensingcitations
- 2019Sustainable and Affordable Composites Built Using Microstructures Performing Better than Nanostructures for Arsenic Removalcitations
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article
Highly Sensitive As3+ Detection Using Electrodeposited Nanostructured MnO x and Phase Evolution of the Active Material during Sensing
Abstract
<p>A simple, one-step electrodeposition approach has been used to fabricate MnO<sub>x</sub> on an indium-doped tin oxide substrate for highly sensitive As<sup>3+</sup> detection. We report an experimental limit of detection of 1 ppb through anodic stripping voltammetry with selectivity to As<sup>3+</sup> in the presence of 10 times higher concentrations of several metal ions. Additionally, we report the simultaneous phase evolution of active material occurring through multiple stripping cycles, wherein MnO/Mn<sub>2</sub>O<sub>3</sub> eventually converts to Mn<sub>3</sub>O<sub>4</sub> as a result of change in the oxidation states of manganese. This occurs with concomitant changes in morphology. Change in the electronic property (increased charge transfer resistance) of the material due to sensing results in an eventual decrease in sensitivity after multiple stripping cycles. In a nutshell, this paper reports stripping-voltammetry-induced change in morphology and phase of as-prepared Mn-based electrodes during As sensing.</p>