Bioactivity and Catalytic Reduction of Aryl Nitro‐Compounds by Biosynthesized Silver Nanoparticles using Skimmiaanquetilia

Abstract

The green synthesis of silver nanoparticles is a rapid and environmentally friendly technique (AgNPs). Silver ions are bioreduced into AgNPs by a compound found in Skimmiaanquetilia's aqueous leaf extract, which consists primarily of alkaloids and coumarins. AgNPs were synthesized and characterized by multiple techniques, including ultraviolet‐visible spectroscopy, Fourier transform infrared analysis, scanning electron microscopy with X‐ray energy dispersive (EDX) investigation, transmission electron microscopy (TEM), and X‐ray diffraction (XRD). The results demonstrated that the AgNPs are highly effective in inhibiting the growth of Escherichia coli. The scavenging activity and hemolysis (2.85 %) of the AgNPs of S. anquetilia leaf extract were also observed and found that the catalyst was useful in the catalytic reduction of aromatic nitro compounds to aromatic amines. NaBH4 was used to catalyse the reduction of nitro compounds by a UV‐Visible spectrophotometer, and the reduction rates of compounds like 4‐nitrophenol, 2‐nitrophenol, 4‐nitroaniline, 2‐nitroaniline, 4‐nitrobenzaldehyde, 2‐nitrobenzaldehyde, 4‐chloronitrobenzene, and 3‐chloronitrobenzene were measured. AgNPs produced from S. anquetilia leaf extract were found to be an effective catalyst for the reduction reaction and to possess potent antibacterial properties. In higher concentrations, AgNPs were found to have greater antioxidant potential than plant extracts.

Characterization of Silver Nanoparticles Synthesized by the Aqueous Extract of Zanthoxylum nitidum and Its Herbicidal Activity against Bidens pilosa L.

“…These characteristic diffraction peaks clearly indicate the crystalline nature of the synthesized Ag NPs and the result is consistent with previous reports for Ag nanocrystals [32,33]. In addition, two weak diffraction peaks at about 32.2 • and 46.1 • (marked with a star) were observed in the pattern, which is common in the reported XRD patterns of Ag NPs [1,19,23,34,35]. It could be associated with the reflections of Ag 2 O left in small quantities after the reaction [36,37].…”

“…It could be associated with the reflections of Ag 2 O left in small quantities after the reaction [36,37]. in the reported XRD patterns of Ag NPs [1,19,23,34,35]. It could be associated with the reflections of Ag2O left in small quantities after the reaction [36,37].…”

Synthesis and Catalytic Activity for 2, 3, and 4-Nitrophenol Reduction of Green Catalysts Based on Cu, Ag and Au Nanoparticles Deposited on Polydopamine-Magnetite Porous Supports

“…Among the organic pollutants phenol and its nitro derivatives are considered the most environmentally hazardous [9]. Their use in the chemical industry for the manufacturing of pharmaceuticals, paper, pesticides, dyes, pigments, explosives, plasticizers, and fungicides generates each year a large quantity of these polluting wastes, which are difficult to degrade due their biological and chemical stability [10,11].…”