Gum acacia as a facile reducing, stabilizing, and templating agent for palladium nanoparticles

Abstract

This article presents the findings of a facile and effective nanoparticle synthesis approach based on aqueous solutions of gum acacia (GA), also known as gum arabic without the addition of any toxic reagents either for the reduction or capping for the effective stabilization of palladium (Pd) nanoparticles with a narrow size distribution (with a H 2 PdCl 4 /GA ratio of 1:29.411, the solution the average diameter was 9.1 nm, and the standard deviation was 60.3 nm). In this approach, the particle size was controlled by the manipulation of the temperature, time, and concentration of GA. The synthesized Pd nanoparticles were well characterized by ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, dynamic light scattering, and thermogravimetric analysis. This route was very simple and reproducible, and further study on the application of these nanoparticles for various organic transformations is underway.

Green synthesis of gum-acacia assisted gold-hydroxyapatite nanostructures – Characterization and catalytic activity

“…The HAp and ambient CO 2 during the processing or C]O stretching of glucuronic acid present in GA molecule. A weak asymmetric stretching vibration band at 2922 cm À1 is observed due to eCH 2 group that is characteristic of GA [42]. The presence of carboxyl groups in all the samples synthesized using gum acacia is confirmed by the peaks appearing at 1629 cm À1 (C]O stretching of the carbonyl group, typical saccharide absorption) from the glucuronic acid of GA molecule that strongly interact and thus assists the growth of HAp nanostructures.…”

“…It is a good emulsifying, stabilizing and dispersing agent due to electrostatic interactions between negatively charged groups from GA and positive sites on the oxide surface [39,41]. Our previous studies on GA explain the basic structure as well as good reducing and stabilizing properties in formation of metal nanoparticles [42,43].…”

Shape Controlled Synthesis of Barium Carbonate Microclusters and Nanocrystallites using Natural Polysachharide – Gum Acacia

“…(3) The smallest fraction (~1% of the total) having the highest protein content (~50 wt %) is a glycoprotein which differs in its amino acids composition from that of the GAGP complex. Here the functional groups namely, hydroxyl (-OH) present in arabinose and rhamnose and carboxylic (-COOH) in glucoronic acid play a crucial role in the growth and formation of metal carbonates whereas the proteinaceous core in amino acids stabilizes the formed metal carbonates [36]. It not only acts as a stabilizer [37], but also acts as surfactant and templating agent for which the functional group moieties (-OH, COOH & -NH 2 ) have been found to play a key role in mimicking the biomineralization process.…”

Bioinspired synthesis of morphologically controlled SrCO3 superstructures by natural gum acacia

“…(3) The smallest fraction (~1% of the total) having the highest protein content (~50 wt%) is a glycoprotein which differs in its amino acids composition from that of the GAGP complex. Here the functional group (-OH) present in arabinose and rhamnose and (-COOH) of glucoronic acids play a crucial role in the growth and formation metal carbonates whereas the proteinaceous core with amino acids stabilize the formed metal carbonates [50]. It not only acts as a stabilizer [51], but also acts as surfactant and templating agent for which the functional group moieties (-OH, COOH and -NH 2 ) have been found to play a key role in mimicking the biomineralization process.…”