A One Pot Green Synthesis and Characterisation of Iron Oxide-Pectin Hybrid Nanocomposite

Abstract

Nano-composites comprised of magnetite nanoparticles in a pectin matrix were prepared by the co-precipitation method. Both sodium hydroxide and ammonium hydroxide were used as precipitating agents and the effects of stoichiometric ratios of iron salts to polymer concentration on particle properties were investigated. The precipitates obtained with NH 4 OH were sponge-like. The XRD pattern revealed magnetite as the only iron oxide phase present when NH 4 OH was used as precipitating base whilst nanoparticles precipitated using NaOH showed the presence of additional peaks. The nanocomposites obtained were further characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and zeta-potential. FT-IR confirmed the COO-Fe linkage. Zeta-potential analysis showed a potential change from positive in pure magnetite to negative in polymer coated magnetite depending on the oxide-polymer ratio. SEM and TEM showed fairly evenly distributed nanosize pores.

Facile synthesis of pectin-stabilized magnetic graphene oxide Prussian blue nanocomposites for selective cesium removal from aqueous solution

“…The increased adsorption efficiency of PSMGPB nanocomposites was attributed to the pectinstabilized separation of graphene oxide sheets and the enhanced distribution of magnetites on the graphene oxide surface. The stabilization of graphene oxide sheets using pectin, and the magnetite distribution were reported previously (Devasenathipathy et al, 2014;Ngenefeme et al, 2013;Namanga et al, 2013;Sahu and Dutta, 2011;Zakharova et al, 2012). Additionally, the presence of functional groups, such as hydroxyl (AOH) and carboxyl (ACOOH), from graphene oxide sheets and pectin enables Prussian blue attachment that leads to enhanced adsorption capacity in PSMGPB nanocomposites.…”

Electrodeposition of copper nanoparticles using pectin scaffold at graphene nanosheets for electrochemical sensing of glucose and hydrogen peroxide

“…The peaks observed at 3600 cm À1 and 2800 cm À1 were assigned to the hydroxyl and carboxylic hydroxyl groups respectively. The peak observed at 1026 cm À1 is assigned to the glycosidic bonds linking two galacturonic sugar units, while the peak obtained at 1608 cm À1 is assigned to the carbonyl group of the esterified pendant of pectin [22,34]. However, all these peaks were disappeared in the ATR-FTIR spectrum of graphene/pectin-CuNPs which clearly indicating that these functional groups are devoted to accommodate CuNPs.…”

Physicochemical and biological characteristics of the nanostructured polysaccharide-iron hydrogel produced by microorganismKlebsiella oxytoca

“…Previously B. Prasad Rao et al reported that after a gradual loss of water up to 180 °C (10% weight loss), the next phase (250–550 °C) showed 20.21% weight loss form EPS decomposition . Another report has revealed that TGA of pure magnetite exhibited no major change in mass with an increase in temperature, whereas pectin coated magnetite displayed a mass descent between 200 and 350 °C which was due to the decomposition of the pectin coating on the nanoparticles .…”

“…Another report has revealed that TGA of pure magnetite exhibited no major change in mass with an increase in temperature, whereas pectin coated magnetite displayed a mass descent between 200 and 350°C which was due to the decomposition of the pectin coating on the nanoparticles [43].…”