Chapter 2 The Development of Basic Concepts of Chemical Kinetics in Heterogeneous Catalysis

doi:10.1016/s0069-8040(08)70152-3

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“…In the case of the silver nanoparticles synthesized using a mixture of extracts ( Figure 8 D), the peaks observed at 749, 1068, and 1558 cm −1 correspond to the stretching vibrations of C-H bonds, while the peak at 1712 cm −1 corresponds to the stretching of C=O bonds. The peaks between 1840 and 2290 cm −1 are due to CO 2 in the ambient environment [ 38 ], while the peaks between 2830 and 2923 cm −1 and 3100 to 3320 cm −1 correspond to the stretching vibrations of C-H and N-H bonds, respectively. The results show that each extract produces silver nanoparticles with unique functional groups and chemical compositions.…”

Section: Resultsmentioning

confidence: 99%

Ultra-Small Silver Nanoparticles: A Sustainable Green Synthesis Approach for Antibacterial Activity

et al. 2023

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The present study centers on the synthesis of ultra-small silver nanoparticles (AgNPs) with antibacterial properties using citrus peel residues (orange, lemon, and grapefruit) as reducing and stabilizing agents, and on assessing their antibacterial activity against multidrug-resistant clinical Staphylococcus aureus. The synthesized AgNPs were analyzed by various techniques, including UV-Vis spectroscopy, SAED, TEM, XRD, FTIR, and Raman. The results demonstrate the formation of ultra-small, monodisperse, quasi-spherical AgNPs with an average particle size of 2.42 nm for AgNPs produced with mixed extracts. XRD analysis indicated that the AgNPs have a crystal size of 9.71 to 16.23 nm. The AgNPs exhibited potent inhibitory activity against resistant S. aureus, with a minimum inhibitory concentration (MIC) of 15.625 to 62.50 ppm. The findings suggest that the ultra-small nanometer size of the AgNPs could be attributed to the synthesis method that employs ambient conditions and the presence of polyphenolic compounds from citrus peel. Consequently, AgNPs obtained through sustainable green synthesis hold significant potential in combating clinical multi-resistant bacterial strains that are challenging to treat and eradicate. This approach also contributes to the revaluation of citrus residues in the region, which is an ongoing environmental issue today.

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Section: Resultsmentioning

confidence: 99%