Journal
POWDER TECHNOLOGY
Volume 217, Issue -, Pages 269-273Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.powtec.2011.10.037
Keywords
alpha-Fe2O3; Nanoparticles; Nanocasting; Mesoporous silica; SBA-15; SBA-16
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Iron oxide (alpha-Fe2O3) nanoparticles with very small size, high crystallinity, and narrow size distribution were synthesized by infiltration of Fe(NO3)(3)center dot 9H(2)O as an oxide precursor into mesoporous silica (SBA-15 and SBA-16) molds using a wet-impregnation technique. High resolution transmission electron microscopy shows that during the hydrothermal treatment of the precursor at 140 degrees C for 2 days, stable alpha-Fe2O3 nanoparticles inside the silica pores are formed. Subsequent dissolution of the mesoporous silica molds by NaOH resulted in well dispersed nanoparticles with an average diameter of similar to 4 nm. (C) 2011 Elsevier B.V. All rights reserved.
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