Green Synthesis, Characterization and Application of Proanthocyanidins-Functionalized Gold Nanoparticles

Abstract

Green synthesis of gold nanoparticles using plant extracts is one of the more promising approaches for obtaining environmentally friendly nanomaterials for biological applications and environmental remediation. In this study, proanthocyanidins-functionalized gold nanoparticles were synthesized via a hydrothermal method. The obtained gold nanoparticles were characterized by ultraviolet and visible spectrophotometry (UV-Vis), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and X-ray diffraction (XRD) measurements. UV-Vis and FTIR results indicated that the obtained products were mainly spherical in shape, and that the phenolic hydroxyl of proanthocyanidins had strong interactions with the gold surface. TEM and XRD determination revealed that the synthesized gold nanoparticles had a highly crystalline structure and good monodispersity. The application of proanthocyanidins-functionalized gold nanoparticles for the removal of dyes and heavy metal ions Ni2+, Cu2+, Cd2+ and Pb2+ in an aqueous solution was investigated. The primary results indicate that proanthocyanidins-functionalized gold nanoparticles had high removal rates for the heavy metal ions and dye, which implies that they have potential applications as a new kind of adsorbent for the removal of contaminants in aqueous solution.

Green synthesis of palladium nanoparticles using lentinan for catalytic activity and biological applications

“…9,10 Fu and coworkers found that the size distribution of proanthocyanidinfunctionalized gold nanoparticles was smaller than that of gold nanoparticles prepared using water extract. 11 Compared with polyphenols, polysaccharides have mild antioxidant properties and high stability in water. Lentinan (LNT) is soluble and biologically active biomacromolecule.…”

Degradation of DDT by gold nanoparticles synthesised using Lawsonia inermis for environmental safety

“…Therefore, it is important to develop safe and economical techniques for the treatment of DDT-contaminated soil. In this respect, nanotechnology offers efficient, eco-friendly and economic solutions to rectify the problem of environmental pollution [7][8][9]. Phytochemicals, which are compounds present in plants, have different biological activities and can be used for the synthesis of metal nanoparticles.…”

“…Due to their small size, nanoparticles have a high surface area-to-volume ratio, and also exhibit excellent electrical, catalytic, optical and magnetic properties [10]. The use of metal nanoparticles for environmental clean-up is a new area of research in which only limited progress has been achieved thus far [7][8][9]. Few reports on the degradation of halocarbons by nanoparticles are available in the literature [11][12][13].…”

Biogenic Synthesis of Gold Nanoparticles and their Applications: A Review

“…Spherical shaped gold nanoparticles have been prepared with juice of pomegranate [165]. The water extract of pomegranate peels have explored for the synthesis of gold nanoparticles that can act as reducing and capping agent to synthesize gold nanoparticles [166]. The peels contain portion of polyphenols and proanthocyanidins that are well known for antioxidant activity.…”

“…The water extract yield of polyphenols and proanthocyanidins have been reported 15-20 % and 1.2-9 %, respectivey with pomegranate peels. The synthesized gold nanoparticles have been tried out for the removal of heavy metal ions and methylene blue dye from effulents [166].…”