Supplementary data for article: Đurđić, S.; Vukojević, V.; Vlahović, F.; Ognjanović, M.; Švorc; Kalcher, K.; Mutić, J.; Stanković, D. M. Application of Bismuth (III) Oxide Decorated Graphene Nanoribbons for Enzymatic Glucose Biosensing. Journal of Electroanalytical Chemistry 2019, 850. https://doi.org/10.1016/j.jelechem.2019.113400

Supplementary material for: [https://doi.org/10.1016/j.jelechem.2019.113400]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/3751

Supplementary data for article: Đurđić, S.; Vukojević, V.; Vlahović, F.; Ognjanović, M.; Švorc; Kalcher, K.; Mutić, J.; Stanković, D. M. Application of Bismuth (III) Oxide Decorated Graphene Nanoribbons for Enzymatic Glucose Biosensing. Journal of Electroanalytical Chemistry 2019, 850. https://doi.org/10.1016/j.jelechem.2019.113400

Supplementary material for: [https://doi.org/10.1016/j.jelechem.2019.113400]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/3751

Application of bismuth (III) oxide decorated graphene nanoribbons for enzymatic glucose biosensing

In present work we report application of bismuth (III) oxide (Bi2O3) decorated graphene nanoribbons (GNR) composite for modification of screen printed electrode, and use of resulting modified screen-printed electrode (SPCE/GNR/Bi2O3) as a disposable glucose biosensor. The composite was synthesized by use of co-precipitation method followed by ultra-sonication. After characterization, the material was applied on the surface of the screen-printed electrode in a ‘drop casting’ fashion. Glucose oxidase (GOx) was added to the modified surface and finally covered by Nafion film. Resulting biosensor electrode (SPCE/GNR/Bi2O3/GOx/Naf) shows excellent performance toward glucose detection, with working linear range from 0.28 to 1.70 mM and detection limit of 0.07 mM. Prepared biosensor was applied for the estimation of glucose level in standard honey samples with declared glucose level, in order to validate the methods (PT scheme). Obtained results are indicating excellent stability, reproducibility, accuracy and precision of the method for the determination of glucose in such samples with negligible matrix effect. Developed biosensor showed high precision, accuracy and selectivity even when employed for determination of glucose content in blood serum and urine samples. Proposed biosensor construction shows promising results and can be considered as stabile and reproducible tool for detection and quantification of glucose in investigated samples.Supplementary material: [http://cherry.chem.bg.ac.rs/handle/123456789/3752

Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid

In the present paper, the electrochemical behavior and the properties of two modified glassy carbon (GC) electrodes used for quantification of gallic acid in sweet wines were compared. A comparative study was conducted between titanium nitride- or wolfram carbide-doped reduced graphene oxide, labeled as TNrGO and WCrGO, respectively, modified GC electrodes, which are promising composite nanomaterials for electroanalytical applications. For the first time, WCrGO was synthesized and its electroanalytical properties compared with those of TNrGO. Results showed that the proposed materials exhibited enhanced characteristics, e.g., low limits of detection (1.1 mu M and 3.1 mu M for TNrGO and WCrGO, respectively), wide linear ranges (for TNrGO 4.5-76 mu M and for WCrGO 10-100 mu M), low adsorption, and low background current, which make them promising candidates for electrochemical sensing applications.Magbiovin project (FP7-ERAChairs-Pilot Call) [621375]Ministry of Education, Science and Technology, the Republic of Serbia [OI 172030]Grant Agency of the Slovak Republic [1/0489/16]Grant Agency of the Slovak Republic VEGA [2/0128/16]info:eu-repo/semantics/publishedVersio