Direct Electrochemistry and Electrocatalytic Properties of Hemoglobin Immobilized on Carbon Nanotubes Ionic Liquid Electrode |
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| Authors: | Niloofar Moheimanian Jahan Bakhsh Raoof Afsaneh Safavi Reza Ojani |
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| Institution: | 1. Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran;2. Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran |
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| Abstract: | Hemoglobin (Hb) was directly immobilized on a multiwalled carbon nanotubes ionic liquid electrode by immersing this electrode in a solution consisting of Hb and 1‐octyl‐pyridinium chloride as an ionic liquid. The immobilized Hb displayed a pair of well‐defined cyclic voltammetric peaks with a formal potential of ?0.187 V in acetate buffer solution, pH 5.0. This modified electrode exhibits fast response, a long linearity range, a low detection limit, high stability and excellent sensitivity through hydrogen peroxide detection with a detection limit (3σ) of 3.18 µM. The electrode was also used for electrocatalysis and voltammetric determination of oxygen and trichloroacetic acid. |
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| Keywords: | Hemoglobin Ionic liquid Multiwalled carbon nanotubes Electrocatalysis Hydrogen peroxide Trichloroacetic acid |
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