Effect of iron acetylacetonate on physico-chemical properties of waterglass based aerogels by ambient pressure drying

A. Venkateswara Rao, Uzma K.H. Bangi, Sunetra L. Dhere, Hiroaki Imai, Hiroshi Hirashima

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The effect of iron acetylacetonate on the physico-chemical properties of waterglass based silica aerogels by ambient pressure drying has been investigated. Doping the gels with iron acetylacetonat (FeAA) facilitates in the diminution of the density of the aerogels. The well established silica network provides effective confinement of FeAA nanoparticles which resists the collapse of silica network during ambient pressure drying. Therefore, in the present paper, the effects of FeAA on the physico-chemical properties of the aerogels have been studied by varying the FeAA:Na2SiO3 molar ratio from 3 × 10-4 to 6 × 10-4. The aerogels were prepared via ambient pressure drying and characterized by the bulk density, thermal conductivity and water contact angle. The aerogel's surface morphology, elemental analysis and pore structure were characterized by means of EDAX and FTIR, TEM and N2 adsorption- desorption analyzer. The high temperature hydrophobicity of these aerogels was checked by heating them in temperature controlled furnace. Silica aerogels with low density ~0.050 g/cc have been obtained using the molar ratio of Na2SiO3:H 2O:FeAA:Citric acid:TMCS at 1:146.67:3 × 10-4:0.54: 9.46, respectively. EDAX and FTIR studies show that the iron species are entrapped in the mesoporous framework and not took part in the bonding with silica.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalJournal of Sol-Gel Science and Technology
Volume57
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

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Keywords

  • Ambient pressure drying
  • Doping
  • Iron acetylacetonate
  • Waterglass

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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