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

Fingerprint

Aerogels
aerogels
chemical properties
Chemical properties
drying
Drying
Iron
Silicon Dioxide
iron
Silica
silicon dioxide
Energy dispersive spectroscopy
citric acid
Citric acid
Hydrophobicity
hydrophobicity
Pore structure
acetyl acetonate
Citric Acid
Contact angle

Keywords

  • Ambient pressure drying
  • Doping
  • Iron acetylacetonate
  • Waterglass

ASJC Scopus subject areas

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

Cite this

Effect of iron acetylacetonate on physico-chemical properties of waterglass based aerogels by ambient pressure drying. / Venkateswara Rao, A.; Bangi, Uzma K H; Dhere, Sunetra L.; Imai, Hiroaki; Hirashima, Hiroshi.

In: Journal of Sol-Gel Science and Technology, Vol. 57, No. 1, 01.2011, p. 95-100.

Research output: Contribution to journalArticle

Venkateswara Rao, A. ; Bangi, Uzma K H ; Dhere, Sunetra L. ; Imai, Hiroaki ; Hirashima, Hiroshi. / Effect of iron acetylacetonate on physico-chemical properties of waterglass based aerogels by ambient pressure drying. In: Journal of Sol-Gel Science and Technology. 2011 ; Vol. 57, No. 1. pp. 95-100.
@article{a140a41d3a594d368b2c671f13846a03,
title = "Effect of iron acetylacetonate on physico-chemical properties of waterglass based aerogels by ambient pressure drying",
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.",
keywords = "Ambient pressure drying, Doping, Iron acetylacetonate, Waterglass",
author = "{Venkateswara Rao}, A. and Bangi, {Uzma K H} and Dhere, {Sunetra L.} and Hiroaki Imai and Hiroshi Hirashima",
year = "2011",
month = "1",
doi = "10.1007/s10971-010-2328-0",
language = "English",
volume = "57",
pages = "95--100",
journal = "Journal of Sol-Gel Science and Technology",
issn = "0928-0707",
publisher = "Springer Netherlands",
number = "1",

}

TY - JOUR

T1 - Effect of iron acetylacetonate on physico-chemical properties of waterglass based aerogels by ambient pressure drying

AU - Venkateswara Rao, A.

AU - Bangi, Uzma K H

AU - Dhere, Sunetra L.

AU - Imai, Hiroaki

AU - Hirashima, Hiroshi

PY - 2011/1

Y1 - 2011/1

N2 - 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.

AB - 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.

KW - Ambient pressure drying

KW - Doping

KW - Iron acetylacetonate

KW - Waterglass

UR - http://www.scopus.com/inward/record.url?scp=79751526411&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79751526411&partnerID=8YFLogxK

U2 - 10.1007/s10971-010-2328-0

DO - 10.1007/s10971-010-2328-0

M3 - Article

VL - 57

SP - 95

EP - 100

JO - Journal of Sol-Gel Science and Technology

JF - Journal of Sol-Gel Science and Technology

SN - 0928-0707

IS - 1

ER -