Facile Synthesis and Special Phase Transformation of Hydrophilic Iron Oxides Nanoparticles

Abstract

Superparamagnetic iron oxide nanoparticles (SPIONs), -Fe 2 O 3 , with hydrophilic surfaces are fabricated in ethylene glycol solutions, without surfactant or additive, by solvothermal process from -Fe 2 O 3 nanoparticle as precursors. With the addition of a trace of hydrazine hydrate, the cubic phase Fe 3 O 4 nanoparticles are obtained instead of -Fe 2 O 3 . The saturation magnetization value of -Fe 2 O 3 nanoparticles is up to 74.3 emu/g. This study provides a low cost, safe, and universal route to serve as excellent biocompatibility magnetic core for future applications in biomedical, agriculture, and horticulture applications.

Synergistic enhancement of biohydrogen production by supplementing with green synthesized magnetic iron nanoparticles using thermophilic mixed bacteria culture

“…Thus, the magnetite formed from DES extracted coconut shell is superparamagnetic in nature [34]. This nature is in line with other studies made by previous researchers [27,31,35]. The average zeta potential of iron oxide nanoparticles was À7.305 mV.…”

All Shapes and Phases of Nanometer-Sized Iron Oxides Made from Natural Sources and Waste Material via Green Synthesis Approach: A Review

“…Therefore, eco-friendly synthesis, as well as a low-toxicity, low-cost, and more facile process, are obtained. For instance, a facile one-step hydrothermal approach, facile microwave-assisted synthesis, − facile coprecipitation methods using poly­(vinyl alcohol) (PVA) as a capping agent under alkaline condition, synthesized process under sunlight, the utilization of ethylene glycol solutions which result in the absence of surfactant or additive used during the synthesis process, synthesize methods by simple precipitation of Fe­(II) and Fe­(III) salts in an aqueous ammonia solution through the addition of polyethylenimine (PEI), etc.…”

“…Iron oxides are chemically stable and naturally abundant, and they could be categorized as ancient materials,which have been utilized a long time for some applications, such as application for tools and weapons in the Iron Age. Nowadays, in nanometer size, iron oxides have been well-developed and synthesized using various methods in the forms of low-dimensional material forms; zero, one, two, and three-dimensional (0D, 1D, 2D, and 3D, respectively). − Each nanometer-sized iron oxides form has its specialty, such as 0D and 3D iron oxides are suitable in biomedical and environmental applications. ,, Although, iron oxide in the form of 0D is still blurred with their exact size, because the obtained 0D iron oxides sizes was mostly reported almost similar to iron oxide in 3D nanoparticles. As for iron oxides in 1D form, many previous studies have been reported.…”