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Journal of Materials Science

, Volume 43, Issue 18, pp 6359–6365 | Cite as

Facile synthesis of ordered mesoporous silica with high γ-Fe2O3 loading via sol-gel process

  • Jiansheng Li
  • Y. S. LinEmail author
Article

Abstract

A series of ordered mesoporous silica loaded with iron oxide was synthesized by facile one-step sol-gel route using Pluronic P123 as the template, tetraethylorthosilicate as the silica source, and hydrated iron nitrite as the precursor under acid conditions. The as-synthesized materials with Fe/Si molar ratio ranging from 0.1 to 0.8 were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), and N2 adsorption porosimetry. All samples possess ordered hexagonal mesoporous structure similar to SBA-15, with a high surface area, large pore volume, and uniform pore size. Although higher iron content causes a distortion of hexagonal ordering structure to some extent, the materials still maintain the ordered mesopore structure even with Fe/Si molar ratio as high as 0.8. Pore structure and TEM data suggest that iron oxide nanoparticles are buried within the silica wall, and increasing the iron oxide loading has little effects on the pore structure of the mesoporous silica. VSM results show as-synthesized samples exhibit superparamagnetic behavior.

Keywords

Mesoporous Silica Iron Oxide Nanoparticles Select Area Electron Diffraction Pattern Silica Matrix Silica Sample 

Notes

Acknowledgements

This work was supported by Petroleum Research Fund (Administered by the American Chemical Society), Natural Science Foundation of Jiangsu Province (grant no.BK2006205), and Young Scholar Science Foundation of Nanjing University of Science & Technology (grant no.NJUST 200502). JSL is grateful to China Scholarship Council for a fellowship to support his visit to ASU.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Department of Chemical EngineeringArizona State UniversityTempeUSA
  2. 2.Department of Environmental Science & EngineeringNanjing University of Science and TechnologyNanjingChina

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