TY  - JOUR
AU  - Alhaddad, Jude
AU  - Alkhadad, Hawra
AU  - AlHannan, Fatima
AU  - Henari, Fryad
AU  - Deen, G. Roshan
PY  - 2025
DA  - 2025/11/17
TI  - Rapid Green Synthesis of Silver Nanoparticles and Alginate-Silver Nanocomposite Beads Using Mashmoom (<i>Ocimum basilicum</i>), a Bahraini Household Medicinal Herb
JO  - Recent Progress in Materials
SP  - 017
VL  - 07
IS  - 04
AB  - The study focuses on the rapid green synthesis of silver nanoparticles (AgNPs) and alginate-silver nanocomposite (Alg-AgNc) beads using sweet basil or Mashmoom (Ocimum basilicum), a common household medicinal herb in Bahrain. The aqueous extract of mashmoom was used as a reducing and stabilizing agent in the reduction of the precursor salt, silver nitrate, and formation of stable AgNPs. The Alg-AgNc beads were prepared by ionotropic gelation of sodium alginate-AgNPs solution in calcium chloride. A strong surface plasmon resonance (SPR) peak at 380 nm confirmed the formation of AgNPs. The size, morphology, and crystallinity of the nanoparticles were determined using transmission electron microscopy (TEM) and selected-area electron diffraction (SAED). The nanoparticles were spherical and ranged in size from 32 to 45 nm. The bandgap of the nanoparticles was calculated using the Tauc equation and was found to be 2.79-2.86 eV. The AgNPs in the Alg-AgNc beads existed as randomly distributed nanoclusters in the size range of 500-900 nm. The amount of AgNPs present in the beads was 3.9 wt.% as determined by energy dispersive X-Ray spectroscopy (EDS). The nanocomposite beads proved highly effective in the catalytic degradation of the organic dye, methylene blue, achieving a maximum degradation of 92%. The rate of degradation followed pseudo-first-order reaction kinetics with two rate constants of 0.0063 min-1 and 0.033 min-1, reflecting surface adsorption followed by rapid degradation. The nanocomposite beads exhibited dose-dependent antibacterial activity against Escherichia coli.
SN  - 2689-5846
UR  - https://doi.org/10.21926/rpm.2504017
DO  - 10.21926/rpm.2504017
ID  - Alhaddad2025
ER  -