Research on the Preparation and Characterization of Magnetic Nanoparticles (MNPs) By Chemical Co-precipitation

Abstract

Abstract. The synthesis and characterization of magnetic nanoparticles (MNPs) are attracting more and more attention in recent years. By chemical co-precipitation, NH 3 ·H 2 O as precipitant, reaction with the mixed solution of Fe 2+ and Fe 3+, then obtain the nanometer magnetite. The sizesof the products are affected by temperature, stirring speed, the concentration of ferric salt, precipitant concentration, the amount of reactants, and the addition with PAAH which makes its good dispersion. The results showed that the best reaction conditions as follows: reactant ratio is Fe ) is 0.5mol/L; the temperature control at 25℃; the stirring speed of 1000r/min. The XRD and SEM had carried on the preliminary characterization to MNPs analysis which showed the particle size of MNPs is about 20nm. The magnetic properties of MNPs had also tested by VSM.

Potensi Nanokomposit Fe3O4@C dari Bijih Besi Sebagai Pendeteksi Kadar Glukosa

“…Karbon digunakan untuk membungkus Fe3O4 sehingga mencegah terjadinya aglomerasi sekaligus mencegah terjadinya oksidasi pada Fe3O4. Metode yang digunakan dalam pembuatan nanopartikel Fe3O4 yaitu metode kopresipitasi [26][27][28][29][30] dan metode hidrotermal pada sintesis Fe3O4@C [19,31,32]. Karbon yang diambil berasal dari glukosa yang disintesis dengan etilen glikol (EG).…”