Green synthesis of palladium nanoparticles using gum ghatti (Anogeissus latifolia) and its application as an antioxidant and catalyst

Abstract

A facile and green route for the synthesis of palladium nanoparticles from palladium chloride was developed using non-toxic, renewable plant polymer, gum ghatti (Anogeissus latifolia), as both the reducing and stabilizing agent. The generated nanoparticles were characterized with UV-visible spectroscopy (UV-vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. The formation of palladium nanoparticles was confirmed from the appearance of intense brown colour and broad continuous absorption spectra in the UV-visible region. The produced nanoparticles were found to be spherical in shape, polydisperse and the average particle size was 4.8 ± 1.6 nm. The face centred cubic crystal structure of the fabricated nanoparticles is confirmed from the selected-area electron diffraction and XRD patterns. Compared to earlier reports, the nanoparticles showed superior antioxidant at a much lower nanoparticle dose. Also, the homogenous catalytic activity of palladium nanoparticles was studied by probing the reduction of dyes such as coomassie brilliant blue G-250, methylene blue, methyl orange, and a nitro compound, 4-nitrophenol with sodium borohydride. The nanoparticles exhibited excellent catalytic activity in dye degradation and the results of this study demonstrate the possible application of biogenic palladium nanoparticles as nanocatalyst in environmental remediation. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Synthesis of novel poly(1‐naphthylamine)‐silver nanocomposites and its catalytic studies on reduction of 4‐nitrophenol and methylene blue

“…The absorbance (At) at λ 664 nm (which is proportional to the concentration of MB) in each minute after the addition of catalyst is noted and pseudo‐first order rate constant (k app ) for decolorization of MB was determined by plotting ln(A t ) against time (Figure ). The apparent rate constant calculated for PNA‐20Ag catalyzed reduction of MB was 0.1686 min ‐1 , and the result is comparable to some reported catalytic studies …”

Green synthesis palladium nanoparticles mediated by white tea (<em>Camellia sinensis</em>) extract with antioxidant, antibacterial, and antiproliferative activities toward the human leukemia (MOLT-4) cell line

“…The PdNPs have enormous catalytic potential in various organic transformations, including Suzukicross, Mizoroki-Heck, Stille, and Sonogashira coupling reactions. [9][10][11] However, the application of PdNPs in the biomedical field is yet to be adequately investigated, although the green-synthesized PdNPs possess remarkable antioxidant 12,13 and antimicrobial activities. 12,14 Plant-derived PdNPs seem to have potential for application in cancer therapy because these compounds are also toxic to cancer cells.…”

“…[9][10][11] However, the application of PdNPs in the biomedical field is yet to be adequately investigated, although the green-synthesized PdNPs possess remarkable antioxidant 12,13 and antimicrobial activities. 12,14 Plant-derived PdNPs seem to have potential for application in cancer therapy because these compounds are also toxic to cancer cells. 15,16 In this study, we demonstrated a simple one-step green process to synthesize PdNPs using Camellia sinensis (white tea [W.tea]) extract from unfermented young tea leaves or unopened buds.…”

Synthesis, structural characterization and catalytic application of citrate-stabilized monometallic and bimetallic palladium@copper nanoparticles in microbial anti-activities

“…Kora and Rastogi have investigated that Pd nanoparticles have no antibacterial activities. 37 The zones of inhibition of Cu nanoparticles against B. thuringiensis and S. aureus were found to be at 14±0 and 16±0 nm, respectively, as shown in Figure S2A and B. The positive control plate loaded with ofloxacin has a zone of inhibition at 16 mm.…”