Vol. 13, Issue 2 (2025)
Green synthesis of silver nanoparticles using green tea (Camellia sinensis) and their catalytic & antibacterial uses
Author(s): Akshay Nandal and Sajjani
Abstract: Silver nanoparticles were synthesized through an eco-friendly route using aqueous leaf extract of Camellia sinensis (green tea) as both reducing and stabilizing agent. Natural phytochemicals including polyphenols, catechins and flavonoids converted silver ions (Ag?) into stable metallic silver (Ag?) nanoparticles at room temperature without chemical reducers. Characterization by UV-Vis, FTIR, XRD, SEM-EDX, TEM, DLS and zeta-potential analyses confirmed the formation of spherical, crystalline, monodispersed particles averaging 20 nm in size with strong surface plasmon resonance at 430 nm and surface charge of -28.7 mV. The biogenic AgNPs exhibited high catalytic efficiency in reducing p-nitrophenol to p-aminophenol, following pseudo-first-order kinetics with an apparent rate constant of 5.10 × 10?³ s?¹. Strong antibacterial activity was recorded against Staphylococcus aureus and Escherichia coli and catalytic activity remained above 95% after five reuse cycles. The findings emphasize the potential of Camellia sinensis for sustainable nanomaterial production with environmental and biomedical relevance.
DOI: 10.22271/chemi.2025.v13.i2a.12619
Pages: 85-98 | 217 Views 136 Downloads
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How to cite this article:
Akshay Nandal, Sajjani. Green synthesis of silver nanoparticles using green tea (Camellia sinensis) and their catalytic & antibacterial uses. Int J Chem Stud 2025;13(2):85-98. DOI: 10.22271/chemi.2025.v13.i2a.12619
