Mn–Zn ferrite with higher magnetization for temperature sensitive magnetic fluid

Abstract

A growth-assisted coprecipitation process is proposed to achieve highly magnetic Mn–Zn ferrite particles. In this method, first, the particles were synthesized by coprecipitation under optimum condition. Then, further enhancement in particle size was obtained by using the already prepared particles as seed. The average crystallite size of the particles prepared by the proposed method was 12 nm. Furthermore, the magnetization at 1 T applied field was 50 emu/g compared to 37 emu/g of coprecipitated particles. It should be noted that the Curie temperature of the particles remained similar to the coprecipitated particles suggesting that the composition of the Mn–Zn ferrite particles has not been affected by the modified synthesis technique. The gradient of the magnetization-temperature curve was enhanced as a consequence of the rise in magnetization. These particles could be used for the synthesis of temperature sensitive magnetic fluid with higher magnetization and magnetization-temperature gradient.

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

“…This duration was sufficient for the transformation of hydroxides into spinel ferrite (dehydration and atomic rearrangement involved in the conversion of intermediate hydroxide phase into ferrite) 21 . Sufficient amount of fine particles were collected at this stage by using magnetic separation.…”

A Facile Plant Mediated Synthesis of Magnetite Nanoparticles Using Aqueous Leaf Extract of Ficus Hispida L. for Adsorption of Organic Dye

“…More recently, use of biomaterials such as microbial, fungi and plant extracts for the preparation of variety of metal oxide nanoparticles due to their nontoxic nature and eco-friendly. The plant extract assisted synthesis of Fe 3 O 4 NPs has been quite limited and few plant extracts mediated works have been reported. For example, Tridax procumbens , Artemisia annua , leaf extract of Perilla frutescens and caricaya papaya and also seed extract of grape proanthocyanidin [21][22][23][24][25] .So far no reports were available for synthesis of Fe 3 O 4 NPs using the aqueous leaf extract of Ficus hispida L. In this work, for the first time, we have synthesized Fe 3 O 4 NPs via plant mediated green synthesis approach using aqueous leaf extract of Ficus hispida L. The synthesis carried out in an aqueous medium, aqueous leaf extract of Ficus hispida L. act as reducing and capping agent for Fe 3 O 4 NPs.…”

“…During the past two decades metal oxide nanomaterials have attracted a great attention due to their unique optical, electrical, magnetic and electronic properties [1].Especially, the magnetic metal oxide nanoparticles received much attention for a wide range of applications such as catalysis, biosensors, ferrofluids, high density magnetic storage media, separation and purification of biomolecules [2][3][4][5][6]. Among all magnetic metal oxides, magnetite (Fe 3 O 4 ) have emerged potential candidates for advance technological applications due to their low toxicity, biocompatibility and super paramagnetic behaviour [7][8][9].…”

Biosynthesis and Characterization of Iron Oxide Nanoparticles Synthesized using Earthworm Based Extracts

“…The iron oxide (Fe2O3) nanoparticles were synthesized by various methods as electrochemical synthesis [5], laser pyrolysis [6], chemical reduction [7] etc. Iron oxide nanoparticles has wider application in biomedicine [8] selfcleaning coatings, topical sunscreens, and antimicrobial soaps [9][10][11][12][13], ferrofluids [14], catalysts [15], separation process [16], batteries [17], sensors [18] and environmental remediation [19]. In recent times, green synthesis of iron oxide NPs using biological agents have become popular among the scientist across the world.…”