An ultra-sensitive non-enzymatic hydrogen peroxide sensor based on SiO2-APTES supported Au nanoparticles modified glassy carbon electrode
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL, cilt.29, ss.390-396, 2019 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 29
- Basım Tarihi: 2019
- Doi Numarası: 10.1016/j.pnsc.2019.08.008
- Dergi Adı: PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.390-396
- Van Yüzüncü Yıl Üniversitesi Adresli: Evet
Özet
A novel electrochemical sensor based on (3-aminopropyl)triethoxysilane (APTES) functionalized SiO2 supported Au nanoparticles and Nafion (Nf) as the protective membrane was fabricated for the electrochemical determination of H2O2 in contact lens-cleaning solution. The modification steps of glassy carbon working electrode (GCE) were evaluated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The amperometric results showed that Nf/Au@SiO2-APTES/GCE sensor can be used to determine H2O2 in contact lens solutions with the linear ranges of 14-180 mu M and 0.18-7.15 mM, excellent sensitivities of 2514.6 and 894.2 mu A mM cm(-2), and a low limit of detection (LOD) of 4.25 mu M depending upon signal-to-noise ratio of 3. Nf/Au@SiO2-APTES/GCE exhibited excellent repeatability with relative standard deviation (RDS) of 2.66% and acceptable reproducibility with RSD of 3.35%. The sensor displayed reasonable selectivity in the presence of uric acid, dopamine, ascorbic acid, glucose, mannose, glycine, fructose, histidine, and arginine with RSD less than 2.5%. The fabricated Nf/Au@SiO2-APTES/GCE sensor has been successfully applied to detect H2O2 in contact lens cleaning solutions.