Magnetite (Fe3O4) - Synthesis, Functionalization and its Application

Abstract

Nanoparticles are smaller than 100nm. Size of particle depends upon the method that is used for synthesis of nanoparticles. Magnetic nanoparticles consist of iron, cobalt and nickel and their chemical compounds. Their safety or toxicity is major concern for use in food. Magnetite, hematite and meghemite are types of magnetic nanoparticles. Magnetite (Fe 3 O 4 ) common among the magnetic iron oxide nanoparticle that is used in food industry. Magnetite is getting popular due to its super paramagnetic properties a nd lack of toxicity to humans. Different methods are used to synthesize magnetic nanoparticles. Upon contact with air these particles loses magnetism and mono-dispersibility. To overcome this problem these nanoparticles are coated with natural or synthetic polymers, metals, organic and inorganic substances to create stable and hydrophilic nanostructures. Due to easy separation with magnet these magnetic nanoparticles are used as an affinity probe to remove bacteria from different food samples and have food related applications e.g, protein purification, enzyme immobilization and food analysis. These magnetic nanoparticles also used for removal of heavy metals and used in medical field.

Hematite and Magnetite Nanostructures for Green and Sustainable Energy Harnessing and Environmental Pollution Control: A Review

“…Pristine H-NPs and M-NPs are still precluded and hampered for niche electrochemical and PEC environmental-related applications owing to their relatively poor electron conductivity, short hole diffusion length, fast photoexcitons, and limited absorption coefficient. , Additionally, upon contact with air (O 2 and moisture), these NPs could experience some serious physicochemical and compositional changes. For example, M-NPs lose some magnetism and monodispersibility when contacted with air for a longer time . Therefore, various efforts are required to overcome these challenges and hence their potential implications in awaiting advanced applications.…”

“…For example, M-NPs lose some magnetism and monodispersibility when contacted with air for a longer time. 149 Therefore, various efforts are required to overcome these challenges and hence their potential implications in awaiting advanced applications. The physicochemical properties of these NPs can be tuned to increase their suitability for various applications.…”

A COMPREHENSIVE STUDY ON THE MICROSTRUCTURE AND OPTICAL PROPERTIES OF Fe3O4 NANOPARTICLES BY VARIATION OF TEMPERATURE AND NaOH CONCENTRATION

“…The last, biological method involves plan mediated, fungi mediated, bacteria mediated, and protein-mediated (Ali, et al, 2016). Among those methods, chemical coprecipitation is considered very appropriate method for synthesizing the Fe 3 O 4 nanoparticles due to its simple procedure, short reaction time, high yield, low synthesis temperature (20 o C -150 o C), relatively narrow size distribution, and cost-effective (Ramadan, et al, 2011;Ali, et al, 2016;Ghazanfari, et al, 2016;Hameed, et al, 2017). (Reddy & Yun, 2016) In this study, we reported the effect of synthesis temperature and NaOH concentration on the microstructure and optical properties of the Fe 3 O 4 nanoparticles.…”

Molecular Dynamics Simulation, Characterization and In Vitro Drug Release of Isoniazid Loaded Poly-ε-caprolactone Magnetite Nanocomposite

“…The chemical stability and possible chemical adaptation by coating the iron oxide cores with several kinds of layers (e.g., silica, gold, and polymers ) can be regarded as desirable properties attributed to iron oxide nanoparticles and they are considered as the individual kind of MNPs that have been accepted by the FDA for medical applications. 19,20 The current research aimed to improve a magnetite poly-єcaprolactone-functionalized nanoparticulate (PCL-MNP) system for drug delivery that could carry and release the drugs over long times. INH is regarded as one of the most important drugs which are widely used in the treatment programs for TB.…”