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Abstract
The present research work reports an eco-friendly route for preparing gold nanoparticles (AuNPs) with high catalytic activity using polyphenol extracted from salvia officinalis. In both alkaline (pH ∼ 11) and acidic media (pH ∼ 5), the polyphenol induced rapid reduction of the Au (III) salt and lead to the formation of highly monodisperse and spherical small (S) and larger (L) AuNPs, respectively. The average particle size was found to be ∼ 6 nm for S and ∼ 27 nm for L AuNPs, respectively. FT-IR revealed that polyphenol species are capped onto the nanoparticles surface favorizing a high aqueous colloidal stability of the AuNPs in a wide pH range. In addition, the produced AuNPs exhibited significant size-dependent degradation rate of p-nitrophenol (p-NP) and methylene blue (MB) to p-aminophenol (p-AP) and leucomethylene blue (LMB), respectively.
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1 College of Science, Northern Border University, Arar, Kingdom of Saudi Arabia; Faculté des Sciences de Bizerte, Laboratoire des composés hétéro-organiques et des matériaux nanostructurés, Université de Carthage, Zarzouna, Tunisia
2 College of Science, Northern Border University, Arar, Kingdom of Saudi Arabia; Faculté des Sciences de Bizerte, Laboratoire des composés hétéro-organiques et des matériaux nanostructurés, Université de Carthage, Zarzouna, Tunisia; Faculty of Science of Tunis, Tunis El Manar University, Tunis, Tunisia
3 College of Science, Department of Zoology, King Saud University, Riyadh, Kingdom of Saudi Arabia