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MWCNT-Organoimido Polyoxomolybdate Hybrid Material: Analytical Applications for Amperometric Sensing of Hydrogen Peroxide |
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| Authors: | Michael López Mujica Ilania Sotomayor-Santander Patricio Hermosilla-Ibáñez Felipe Oyarzun-Ampuero Marcela C Rodríguez Gustavo A Rivas Diego Venegas-Yazigi Soledad Bollo |
| Institution: | 1. INFIQC-CONICET, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria., 5000 Córdoba, Argentina;2. Departamento de Química de los Materiales, Facultad de Química y Biología, University of Santiago of Chile (USACH), Department of Chemistry of Materials, Chile
University of Santiago of Chile (USACH), Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Chile;3. Departamento de Química de los Materiales, Facultad de Química y Biología, University of Santiago of Chile (USACH), Department of Chemistry of Materials, Chile;4. Advanced Center for Chronic Diseases (ACCDiS). Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile Departamento de Ciencias y Tecnología Farmacéutica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile;5. Advanced Center for Chronic Diseases (ACCDiS). Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile |
| Abstract: | We report a hybrid material obtained by dispersing the polyoxometalate n-Bu4-N]2Mo6O18NC13H9] functionalized with 2-aminofluorene (POMAF) and multi-walled carbon nanotubes (MWCNTs) in 1,3-dioxolane (MWCNT- POMAF). We demonstrate the peroxidase-like activity of the hybrid material and its application for the amperometric quantification of hydrogen peroxide at ?0.450 V previous drop-coating at glassy carbon electrodes, with a linear range between 1.0 μM and 6.0 μM and a detection limit of 330 nM. The reproducibility was 2.2 % using one MWCNTs-POMAF dispersion, and 3.9 % using 4 different dispersions. The sensor was successfully used for the quantification of hydrogen peroxide in enriched milk samples. |
| Keywords: | Multi-walled carbon nanotubes Polyoxomethalate Nanozyme Hydrogen peroxide Carbon nanotubes functionalization |