A Nitrite Electrochemical Sensor Based on Boron-Doped Diamond Planar Electrochemical Microcells Modified with a Monolacunary Silicotungstate Polyoxoanion - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Electroanalysis Année : 2015

A Nitrite Electrochemical Sensor Based on Boron-Doped Diamond Planar Electrochemical Microcells Modified with a Monolacunary Silicotungstate Polyoxoanion

Résumé

A new boron doped diamond microcells (BDD) was modified, for rapid, selective and highly sensitive determination of nitrite, using a coating film of polyoxometalates (POMs), formed by cyclic voltammetry on the molecular p-phenylenediamine (PPD) functionalized BDD. The scanning electron microscopy (SEM) technique was used to examine the morphology of (PPD/SiW11) modified (BDD) electrode. It was found that (SiW11) layer was uniformly formed on the electrode surface. It was observed that (BDD/PPD/SiW11) showed excellent electrocatalytic activities towards nitrite ion. Under the selected conditions, the anodic peak maximum at -0.6V was linear versus nitrite concentration in the 40 mu M-4 mM range, and the detection limit obtained was 20 mu M. The newly developed electrode has been successfully applied to the determination of nitrite content in real river water samples.

Dates et versions

hal-01186969 , version 1 (25-08-2015)

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Yosra Sahraoui, Amel Sbartai, Sana Chaliaa, Nicole Jaffrezic-Renault, Abderrazak Maaref, et al.. A Nitrite Electrochemical Sensor Based on Boron-Doped Diamond Planar Electrochemical Microcells Modified with a Monolacunary Silicotungstate Polyoxoanion. Electroanalysis, 2015, 27 (6), pp.1359-1367. ⟨10.1002/elan.201400682⟩. ⟨hal-01186969⟩
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