Nano-porous silica (SiO2) and Iron-silica (Fe2O 3-SiO2) composite synthesis via reverse microemulsion for catalytic applications

Lal Said Jan, Shahidan Radiman, I. I. Yaacob

Research output: Contribution to journalArticle

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Abstract

Nanostructured silica and silica-iron composite particles were prepared using water-in-oil (w/o) reverse microemulsion. Double microemulsion technique is used for the synthesis of both types of nanostructured particles. X-ray Diffractometry (XRD), scanning electron microscopy (SEM), nitrogen gas adsorption-desorption isotherm technique, and differential scanning calorimetry (DSC) were used to characterize the synthesized particles. The gas adsorption-desorption measurements revealed a mesoporous structure for the silica (SiO2) particles with a surface area of 300.49 m 2/g. Upon the addition of an iron microemulsion to the silica microemulsion, silica-iron nanocomposite (Fe2O3-SiO 2) was achieved which gave a surface area of 69.87 m2/g. This indicated a positive impregnation of the silica mesopores that was further confirmed by energy dispersive spectrometry (EDS). The XRD of bare SiO 2 gave a single broad peak whereas SiO2-Fe 2O3 demonstrated additional peaks confirming α-iron insertion in mesoporous silica. DSC curve with its characteristic peaks also indicated the presence of iron nanoparticles within silica. The product silica-iron nanocomposite has potential catalytic and semiconducting applications.

Original languageEnglish
Pages (from-to)1127-1132
Number of pages6
JournalKey Engineering Materials
Volume306-308 II
Publication statusPublished - 2006

Fingerprint

Microemulsions
Silicon Dioxide
Iron
Silica
Composite materials
Gas adsorption
X ray diffraction analysis
Differential scanning calorimetry
Desorption
Nanocomposites
Impregnation
Spectrometry
Isotherms
Oils
Nitrogen
Nanoparticles
Scanning electron microscopy
Water

Keywords

  • Catalysis
  • Microemulsion
  • Nanostructured
  • Silica-iron composite

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

Cite this

Nano-porous silica (SiO2) and Iron-silica (Fe2O 3-SiO2) composite synthesis via reverse microemulsion for catalytic applications. / Jan, Lal Said; Radiman, Shahidan; Yaacob, I. I.

In: Key Engineering Materials, Vol. 306-308 II, 2006, p. 1127-1132.

Research output: Contribution to journalArticle

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