Microwave assisted green synthesis and characterization of silver/montmorillonite heterostructures with improved antimicrobial properties

Antifungal Properties of Nanosilver Clay Composites Against Fungal Pathogens of Agaricus bisporus

“…[46] In addition to the size and shape of NPs, the concentration/ loading of NPs on the clays greatly affects microbial toxicity. [31,47,48] In a study conducted by Pillai et al [28] antibacterial activity was observed from a silver clay composite (tested against S. aureus, B. cereus, E. coli, and P. aeruginosa) with a silver loading of 2.3 %, much lower than the loading of Ag on zeolite and montmorillonite in this study. In addition, Missengue et al [47] noted that the antimicrobial effect of AgNPs increases with an increase in silver loading on the support and the amount of silver that leaches from the support.…”

“…Nanosilver clay composite samples were prepared for TEM analysis as follows; a small quantity of each nanosilver clay composite sample powder was individually sonicated in 1 mL of 95 % methanol for 5 min. [28,30] The sample solutions were deposited on Cu-grids with holey carbon film (Sigma-Aldrich, Johannesburg, South Africa). Particle size distribution analysis was done on the TEM images (circa 200 particles) using ImageJ software (National Institute of Health, Maryland, USA).…”

“…The general increase in the intensity of the peaks and the downward shift of SiÀ O stretching vibration showed some alteration in the chemical structure due to van der Waals interactions between the oxygen groups of clay minerals and AgNPs. [28] The elemental composition of the three nanosilver clay composites was studied using energy-dispersive X-ray spectroscopy (EDS). The energy peaks for Si, Al, and O, elements typically found in clays, were detected for all three clays, while peaks were obtained at 3 keV, indicating the presence of Ag on the clays (Figures 3A to 3C).…”

Cannabidiol-Mediated Green Synthesis, Characterization, and Cytotoxicity of Metal Nanoparticles in Human Keratinocyte Cells

“…Additionally, there are several advantages that microwave-assisted synthesis offers when compared to conventional synthesis, including increased yield and purity of particles, time and cost efficiency, uniform and rapid heating of materials, and narrow particle size distribution of NPs . Furthermore, our research group previously reported the synthesis of AgNPs by a microwave-assisted method where no reducing agents were employed …”

“…47 Furthermore, our research group previously reported the synthesis of AgNPs by a microwave-assisted method where no reducing agents were employed. 48 According to the authors' knowledge, there have been no scientific reports on the use of CBD in green synthesis or the cytotoxicity of CBD-capped NPs in human keratinocytes. This study investigated (i) the potential of CBD to function as an environmentally friendly capping and reducing agent in MNP synthesis and (ii) comparative cytotoxicity analysis of CBD and CBD-capped NPs in keratinocyte (HaCaT) cells.…”