Biomimetic synthesis, characterization and mechanism of formation of stable silver nanoparticles using Averrhoa carambola L. leaf extract

Antimicrobial Effects of Silver Nanoparticles Synthesized by Fatsia japonica Leaf Extracts for Preservation of Citrus Fruits

“…Meanwhile, the control group showed no absorbance in visible region, while the treatment groups indicated strong absorbance in visible region (Figure A). Similar results were also reported in other plants leaf extracts (Ghaedi and others ; Manjari Mishra and others ), and above results proved that the F. japonica leaf extracts could mediate the AgNPs synthesis for the first time.…”

“…Four characteristic diffraction peaks of 2θ at 38.22 (111), 46.34 (200), 64.64 (220), and 77.26 (311) were observed in the XRD pattern of AgNPs, which was identical to that of pure silver nanocrystals recorded in file No.04‐0783 of Joint Committee on Powder Diffraction Standards, and as‐observed XRD noise of AgNPs might be attributed to the complex biomolecules from F. japonica leaf extracts (Ye and others ). Above results indicated that as‐synthesized AgNPs contained pure silver nanocrystals, and similar results were reported in AgNPs synthesized by various biomass (Wei and others ; Manjari Mishra and others ).…”

“…In contrast, the biosynthesis methods, using plants or microorganisms as synthesis materials, are considered as the safe and eco‐friendly methods (Sharma and others ). Besides the plants mediated methods show prime application potential because of their workability and convenience (Velmurugan and others ; Ghaedi and others ; Manjari Mishra and others ; Vimala and others ). Plants materials act as the reducing agent and capping stabilizer for AgNPs synthesis (Ghaedi and others ; Manjari Mishra and others ; Dhand and others ), and as‐synthesized AgNPs with different plant materials will be coated with different plants components (Sathishkumar and others ).…”

Optimization of silver nanoparticles biosynthesis mediated by Aspergillus niger NRC1731 through application of statistical methods: enhancement and characterization

“…In contrast, C-H bond peak could be distinguished at 2923, and 2856 cm −1 as a result of methylene, methoxy, and methyl groups stretching vibrations, while O-H group stretching due to the proposed presence of alcohols, flavonoids, and phenols was viewed at 3426, and 3760 cm −1 (Mittal et al 2014), at 3415 cm −1 for alcohol and phenol O-H stretch (Veisi et al 2018), or at 3650 for alcohol O-H stretch, whereas C=O bond stretching peak was detected at 2362 cm −1 (Misra et al 2006). The detected sharp peak at 3432 cm −1 could refer to the typical phenomenon of proteins due to -NH overlapping stretching vibration (Manjari Mishra et al 2015). Based on the detected peaks from FTIR spectroscopy, we can wrap up the involvement of the protein agent which could be reductase enzymes in Ag + reduction in order to mediate the AgNPs biosynthesis.…”

Biomimetic synthesis of Ag/TiO2 nanocomposites using a natural surfactant for effective degradation of an environmental pollutant

“…In the present study, we have first time used aqueous leaf extract (both dry and fresh leaf extract) of Aver-rhoa carambola L. (Order Oxalidales, family Oxalidaceae) for the biomimetic synthesis of Ag/ TiO 2 nanocomposites. The biomolecules such as reducing sugar, proteins, flavonoids and mainly the carambolaflavone present in the leaf extracts act as reducing, capping and stabilizing agents in the synthesis Ag/TiO 2 nanocomposites [18,19]. The biosynthesized Ag/TiO 2 composites showed remarkable photocatalytic activity towards degradation of MO.…”