A facile green synthesis of nanostructured Gold-Silver@Carbon (Au-Ag@C)‎ nano catalyst and its applications

Abstract EN

In this communication, the room-temperature synthesis of gold-silver nano-structures using ascorbic acid (AA) by simple one-step process is reported.

Furthermore, the core-shell-type of gold-silver@carbon catalyst (Au-Ag@C) has been derived by microwave irradiation.

The surface morphology expresses the neat single metal and bimetal formation.

The AA acts as a reductant as well as a stabilizer of metal nanoparticles (MNPs).

The microscopic studies reveal the formation of MNPs as quantum dots (-3-5 nm).

The excess reductant has been used as a precursor for carbon and in some case it forms as nanowires.

The catalyst Au-Ag@C shows the excellent catalytic activity toward 4-nitrophenol reduction at room temperature.

The proposed method is facile, fast and eco-friendly for the synthesis of Au-Ag MNPs.