Catalytic reduction of 4-nitrophenol and methylene blue by biogenic gold nanoparticles synthesized using <i>Carpobrotus edulis</i> fruit (sour fig) extract

Along with the increasing requirement for efficient organic conversions using green chemistry, there is a need to develop highly and eco-friendly catalytic reaction systems. Gold nanoparticles (AuNPs)-based nanocatalysts are promising candidates reduction of environmental pollutants, such as nitroaromatics dyes. This study reports on synthesis AuNPs Carpobrotus edulis (C. edulis) fruit aqueous extract (CeFE) their activities. The CeFE induced rapid gold (III) salt form monodispersed spherical AuNPs, core hydrodynamic sizes 40 108.7 nm, respectively. alone had no effect 4-nitrophenol, whereas incubation methylene blue (MB) caused peak at 665 nm. Addition CeFE-AuNPs in presence NaBH 4 , 4-nitrophenol 4-AP, MB leucoMB within 10 min. These reactions followed pseudo first-order kinetics. Therefore, biogenic could be used elimination noxious pollutants.