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CONTROLLED GROWTH OF IRON OXIDE MAGNETIC NANOPARTICLES VIA CO-PRECIPITATION METHOD AND NaNO3 ADDITION

Sulungbudi, Grace Tj and Yuliani, Yuliani and Lubis, Wildan Zakiah and Sugiarti, Sri and Mujamilah, Mujamilah (2017) CONTROLLED GROWTH OF IRON OXIDE MAGNETIC NANOPARTICLES VIA CO-PRECIPITATION METHOD AND NaNO3 ADDITION. Jurnal Sains Materi Indonesia, 18 (3). pp. 136-143. ISSN 1411-1098

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Abstract

Size controlled magnetic nanoparticle (MNPs) of iron oxide were prepared in the presence of NaNO3 via co-precipitation method followed by HNO3 peptizing according to Massart’s method. The MNPs size were reduced by addition of NaNO3 in varied molarity and at different stage of process. As an end product, stable water-base colloids were formed. XRD pattern analysis using Rietveld method confirmed Fe3O4/g-Fe2O3 phase formation with nanoscale crystallite size. This crystallite size significantly decrease with NaNO3 addition from 12 nm to smaller than 8 nm, and give end-result of decreasing magnetization as measured by VSM. Langevin fitting of magnetic hysteresis curve also revealed the magnetic core size of nearly the same behaviour. TEM results show bigger value for single magnetic nanoparticle of > 10 nm and < 10 nm for MNPs without and with NaNO 3 addition, respectively. However, PSA measurement still trace a low nanoparticle agglomeration of ~ 20 nm, even after surface peptization using HNO3. A possible mechanism is proposed to explain these characteristics formation especially of the MNP’s size.

Item Type: Article
Subjects: Daur Bahan Bakar Nuklir dan Bahan Maju > Bahan Struktur dan Bahan Maju
Divisions: Pusat Sains dan Teknologi Bahan Maju
Depositing User: EDITOR PSTBM BATAN
Date Deposited: 01 Dec 2018 13:56
Last Modified: 01 Dec 2018 13:56
URI: http://repo-nkm.batan.go.id/id/eprint/7303

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