Ag@Au bimetallic nanoparticles: an easy and highly reproducible synthetic approach for photocatalysis. Issue 22 (20th October 2022)

• Record Type: Journal Article
• Authors: Urzúa, Esteban; Gonzalez-Torres, Fernando; Beltrán, Valentina; Barrias, Pablo; Bonardd, Sebastian; Ramírez, A. M. R.; Ahumada, Manuel
• Is Part Of: Nanoscale advances. Volume 4:Issue 22(2022)
• Page Start: 4789
• Page End: 4797
• Publication Date: 2022-10-20
• Subjects: 620.5
• DOI: 10.1039/d2na00539e
• Languages: English
• ISSNs: 2516-0230

Abstract

Abstract : An Ag@Au bimetallic nanoparticle (BNP) formulation was developed in this work. Abstract : An Ag@Au bimetallic nanoparticle (BNP) formulation was developed in this work. The proposed formulation was developed using photochemical and chemical methods and non-toxic reagents, showing high reproducibility and homogeneity. The synthesized BNPs have an average size of 7 nm, a core–shell-like structure (silver core and gold shell), high colloidal and long-term stability, and superior catalytic activity under darkness and white light irradiation conditions when evaluating the reduction of 4-nitrophenol to 4-aminophenolate, with respect to the monometallic Ag and Au counterparts. Furthermore, BNP concentrations as low as 2 nM were required to reach 100% conversions in less than 30 minutes. Therefore, considering future applications, the high surface-to-volume ratio of the prepared BNPs coupled with their well-defined optical properties makes them a great candidate for developing heterogeneous catalyzer materials to be applicable under sunlight as an environmentally friendly catalytic system.