Study on the Synthesis of Cyanex 301-Modified Fe₂O₃ Nanoparticles

Abstract

Surface modified Fe₂O₃ nanoparticles were successfully synthesized via different thermal treatment of the Fe(OH)₃ precursor, which was obtained by the extraction-precipitation system. The Fe³⁺ ions were extracted into hexane by the extractant first, then the extracted solution containing Fe(III) complex was precipitated with NaOH solution. The obtained Fe(OH)₃ precursor was given different thermal treatment, such as solvothermal reaction, an intense refluxing boiling tetralin and calcine at air, respectively. The obtained Fe₂O₃ nanoparticles were characterized by XRD, TEM, SEM, IR, UV-vis, and TG-DTG, respectively. The results showed that Fe₂O₃ products were well modified by extractant, which could be well dispersed into organic solvents to form the stable fluids.

Keywords:

• Chemical synthesis
• composite
• electron microscopy
• magnetic material

Acknowledgements

This work was financially supported by the foundation of Ph.D. subjects 2005, P. R. China (No. 20050426003) and the Key Laboratory Foundation of Eco-Chemical Engineering of Qingdao University of Science and Technology (No. KLECE 2007-001). The authors thank Cytec Canada, Inc. for its kindly supplying the extractant of Cyanex 301.