Hydrothermal synthesis of magnetite: investigation of influence of aging time and mechanism

Abstract

Magnetite (Fe 3 O 4 ) particles are prepared by a hydrothermal method using ethylene glycol as the solvent. Aging time is a very important factor in the reaction process. The properties and morphology of the products with different aging times are investigated. In the initial stage of the reaction (1 and 2 h), the main powders were iron hydroxides. Fe 3 O 4 particles generated (3 h) and grew into spherical shapes (4-10 h) with the extended aging time. The particle size and the specific saturation magnetisation also varied with aging time. By analysing the powders and the liquids during the reaction, a probable mechanism is studied.

The Investigation into the Toxic Potential of Iron Oxide Nanoparticles Utilizing Rat Pheochromocytoma and Human Neural Stem Cells

“…Compared to other methods, such as chemical and biosynthesis of magnetite [13,14,15], hydrothermal synthesis can be performed as a one-pot reaction. In addition, using ethylene glycol as the solvent alleviates the oxidation of Fe 2+ , allowing the reaction to proceed in the presence of oxygen [16]. When coated with various functional groups, Fe 3 O 4 NPs can present differences in cytotoxicity and genotoxicity to different cell types [17].…”

Solvothermal synthesis of sub‐200 nm Fe 3 O 4 submicrospheres with enhanced catalytic performances by using acicular goethite as solid precursor

“…Since then, it has become a popular method to make Fe 3 O 4 ‐based functional nanostructured materials [10–13]. Previous works mainly focused on the effects of process parameters or organic additives on the synthesis of Fe 3 O 4 while the effects of iron precursors have been rarely investigated [14, 15]. Without the addition of a capping agent (e.g.…”

Upscale Design, Process Development, and Economic Analysis of Industrial Plants for Nanomagnetic Particle Production for Environmental and Biomedical Use

“…The method we have chosen to upscale will be the one followed by [36], choosing to use as reactants the iron salt, starch and sodium acetate, and as reaction conditions a temperature of 80 • C during 20 min and then a hydrothermal treatment of 20 h. The involved reactions (2)-(4) are [37][38][39][40]:…”