Stojkovikj, Sasho and Mirceski, Valentin and Najdoski, Metodija and Sefer, Birhan (2016) Design of Nonenzymatic Amperometric Sensor for H2O2 Based on Electrodes Modified with Nanoscaled MnCO3 Thin Films. In: 2nd International Congress of Chemists and Chemical Engineers of Bosnia and Herzegovina, 21-23 Oct 2016, Sarajevo, Bosnia and Herzegovina.
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Abstract
The present study is related to the development of nonenzymatic amperometric sensors for detection of hydrogen peroxide (H2O2). The designed sensors are based on manganese(II) carbonate thin film modified electrodes. The films are deposited on electroconductive fluorine doped SnO2-coated glass substrates using chemical bath deposition method. Thin film chemical composition and structural analysis are studied using XRPD and FTIR. The electrochemical properties and sensitivity towards H2O2 are examined using cyclic voltammetry and chronoamperometry. Thin films with three different thicknesses of 75 and 100 nm are used. The electrochemical experiments are carried out in a phosphate buffer solution with c(K2HPO4/KH2PO4) = 0.1 M and pH = 7.5 and wide concentration range of hydrogen peroxide from 0.1 to 25 mM is investigated. The best results are obtained under oxidation potential when using 75 nm MnCO3 thin film and concentrations of H2O2 from 0.1 up to 10 mM. The lowest detection limit was 90 μM and the sensitivity of the sensor was 2.00 μA·cm-2·mM-1. The calibration plot is associated with a linear regression line and coefficient of R2 = 0.99.
| Item Type: | Conference or Workshop Item (Poster) |
|---|---|
| Additional Information: | The abstract is published in the Bulletin of the Chemists & Technologists of Bosnia & Herzegovina / Glasnik Hemičara i Tehnologa Bosne i Hercegovine, 2016, p77 |
| Subjects: | Natural sciences > Chemical sciences Engineering and Technology > Materials engineering |
| Divisions: | Faculty of Technology |
| Depositing User: | Saso Stojkovik |
| Date Deposited: | 04 Mar 2024 13:15 |
| Last Modified: | 04 Mar 2024 13:15 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/33803 |
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