Open AccessRapid Synthesis of Gold Nanoparticles with Ginger Waste using Microwave Irradiation
Author(s) -
G. Bhagavanth Reddy,
Beulah J.M. Rajkumar,
K. Girija Mangatayaru,
Tingling Rao
Publication year - 2019
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22514
Subject(s) - colloidal gold , zeta potential , dynamic light scattering , fourier transform infrared spectroscopy , nanoparticle , chemistry , transmission electron microscopy , nuclear chemistry , particle size , spectroscopy , chemical engineering , reducing agent , analytical chemistry (journal) , nanotechnology , materials science , organic chemistry , physics , quantum mechanics , engineering
In the present investigation, synthesis of gold nanoparticles (AuNPs) was carried out with microwave irradiation of HAuCl4 and the extract of ginger waste. Synthesized AuNPs were characterized by various techniques including UV-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), dynamic light scattering (DLS) and transmission electron microscopy (TEM). The TEM images revealed that the nanoparticles were spherical in shape and the average particle size of the AuNPs was found to be approximately 6 ± 2 nm. The stability of goldnanoparticles was analyzed by zeta potential measurements. A negative zeta potential value of -18.4 mV indicates the stability of the AuNPs. Further, gold nanoparticles exhibited the excellent catalytic activity in reducing 4-nitrophenol to 4-aminophenol in the presence of NaBH4 (reducing agent), and it was found to depend on the amount of AuNPs and temperature. Gold nanoparticles did not show any significant antibacterial activity against the pathogenic bacteria studied.