Nanoengineering of Surface Modified Silica Particles to Form Core-Shell and HollowNanospheres of Iron Oxide
The method of synthesizing nanoshell of α-Fe2O3 on silica core nanoparticle and hollow α-Fe2O3 nanoparticles is described. The silica particles of ∼160 nm diameter were surface modified using 3-aminopropyltrimethoxysilane (APS) for easy adsorption of iron on it. These particles were treated with FeCl3 and further heat treated up to 1000 °C to get α-Fe2O3 shell of thickness ∼20 nm. The hollow iron oxide particles were prepared using sacrificial core removal using dilute HF solution. The particles were characterized for their structure, morphology, bonding and surface chemistry using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Fourier Transform Infra Red Spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy (XPS).
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Document Type: Research Article
Publication date: 01 October 2007
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