MATEC Web of Conferences
Volume 39, 20162015 2nd International Conference on Chemical and Material Engineering (ICCME 2015)
|Number of page(s)||4|
|Section||Novel materials and properties|
|Published online||13 January 2016|
The Effect of pH and Time on The Stability of Superparamagnetic Maghemite Nanoparticle Suspensions
Department of Chemical Engineering, Lhokseumawe State Polytechnic, 24301 Lhokseumawe, Indonesia
a Corresponding author: email@example.com
Maghemite (γ-Fe2O3) nanoparticles have been synthesized using a chemical co-precipitation method. The morphology and particle size is characterized using Transmission Electron Microscopy (TEM), and magnetic characterization using Alternating Gradient Magnetometry (AGM). The stability of the maghemite nanoparticles suspension were studied at different pH and time of storage. Dynamic Light Scattering (DLS) and Zeta Potential were conducted to determine the stability of the suspensions. TEM observation showed that the particles size is 9.6 nm and have spherical morphology. The particles showed superparamagnetic behavior with saturation magnetization 25.5 emu/g. The suspensions are stable in the acidic condition at pH 4 and alkaline condition at pH 10. The suspensions remain stable after 4 weeks of storage.
© Owned by the authors, published by EDP Sciences, 2016
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