Assembling magnetic iron nanoparticles in mesoporous silica spheres with expanded pore size

Ping Wang, Yi Hua Zhu, Xiao Ling Yang, Xiao Han

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Mesoporous silica (MS) microspheres with about 3 nm pore size were synthesized by n-hexadecylamine and TEOS in definite experimental conditions. To facilitate the incorporation of magnetic nanoparticles, an approach for three-ingredient salt impregnating was proposed for expanding the pore size of spheres with large extent. MS spheres were impregnated into three-ingredient salt of NaCl: LiCl: KNO3=20: 5: 5 (mass ratio) at 300°C for 2 h to enlarge the pore size of MS spheres. The average pore size of modified MS spheres was about 10 nm. The magnetic nanoparticles within the pores of modified MS microspheres were synthesized by electrochemical method. Finally, the obtained iron-functionalized silica microspheres were thermally reduced under the hydrogen atmosphere to produce iron/silica magnetic composite. The result showed that Fe nanoparticles were incorporated into the pores of MS spheres.

Original languageEnglish (US)
Pages (from-to)162-166
Number of pages5
JournalGuocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering
Issue number1
StatePublished - Jan 2008
Externally publishedYes


  • Assembly
  • Magnetic nanoparticle
  • Mesoporous silica
  • Microspheres
  • Pore-expanding


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