Agro-industrial waste-mediated synthesis and characterization of gold and silver nanoparticles and their catalytic activity for 4-nitroaniline hydrogenation

作者：Dauthal Preeti; Mukhopadhyay Mausumi^*

来源：Korean Journal of Chemical Engineering, 2015, 32(5): 837-844.

DOI：10.1007/s11814-014-0277-y

• Citrus aurantifolia
• Nanoparticles
• Biosynthesis
• Hydrogenation
• Nitroaniline

The biosynthesis of gold (Au-NPs) and silver nanoparticles (Ag-NPs) using agro-industrial waste Citrus aurantifolia peel extract as a bio-reducing agent is reported. Catalytic activity of nanoparticles (NPs) was evaluated for hydrogenation of anthropogenic pollutant 4-nitroaniline (4-NA). Both synthesized NPs were nearly spherical and distributed in size range of 6-46 and 10-32 nm for Au-NPs and Ag-NPs, respectively. XRD analysis revealed face centered cubic (fcc) structure of both NPs. zeta potential value obtained from colloidal solution of Au-NPs and Ag-NPs was -28.0 and -26.1mV, respectively, indicating the stability of the NPs in colloidal solution. FTIR spectra supported the role of citric and ascorbic acids of peel extract for biosynthesis and stabilization of NPs. The biosynthesized NPs exhibited excellent catalytic activity for hydrogenation of 4-NA in the presence of NaBH4.

• 出版日期2015-5