Antioxidant Activity and H2O2 Sensing Ability of Silver Nanoparticles Synthesized Using Solanum melongena L. Peel Extract
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Abstract
The green synthesis of silver nanoparticles (AgNPs) using plant extracts is a rapid and eco-friendly method. Solanum melongena L. peel (SMP), rich in polyphenols and anthocyanins, is a promising candidate for this process. This study aims to synthesize silver nanoparticles using Solanum melongena L. peel water extract (SMP-AgNPs) and evaluate their antioxidant activity and potential as a H₂O₂ sensor. SMP-AgNPs were characterized using UV-Vis spectrophotometry, scanning electron microscopy (SEM), and particle size analysis (PSA). The UV-Vis spectrum showed a peak at 455 nm. PSA analysis revealed an average diameter of 205.2 nm with a polydispersity index (PDI) of 0.460, while SEM confirmed a spherical shape. SMP-AgNPs exhibited strong antioxidant activity with an IC₅₀ value of 138.77 µgmL-1. As a H₂O₂ sensor, they demonstrated a linear response in the 0.001–0.08 mM (R² = 0.9959) and 0.1–1 mM (R² = 0.9953). The limit of detection (LOD) was 0.0066 mM and 0.0432 mM, while the limit of quantification (LOQ) was 0.0219 mM and 0.144 mM. SMP-AgNPs showed high selectivity and accuracy, with a recovery percentage of 80.924–115.015% and good precision (%RSD: 0.409–3.875%). These findings confirm their strong antioxidant properties and excellent potential as a sensitive and selective H₂O₂ sensor. SMP-AgNPsSMP-AgNPsSMP-AgNPsSMP-AgNPsSMP-AgNPsSMP-AgNPs.
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