Alkoxide-free sol-gel synthesis of aerogel iron-chromium mixed oxides with unique textural properties

Abbas Khaleel; Ali Al-Marzouqi

doi:10.1016/j.matlet.2011.11.002

Alkoxide-free sol-gel synthesis of aerogel iron-chromium mixed oxides with unique textural properties

Abbas Khaleel, Ali Al-Marzouqi

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Aerogel chromium-iron mixed oxide with equimolar amounts of both metals was prepared by a sol-gel method using nitrate salts of both metals. Propylene oxide was used as an efficient gelation promoter and supercritical CO ₂ was employed for solvent extraction from the gel. The calcined mixed oxide showed significantly higher surface areas, larger pore volume, and enhanced thermal stability as compared with its xerogel counterpart and the corresponding single-metal oxides. Textural properties were compared at various calcination temperatures and unique textural properties were observed after calcinations at 350 °C.

Original language	English
Pages (from-to)	385-387
Number of pages	3
Journal	Materials Letters
Volume	68
DOIs	https://doi.org/10.1016/j.matlet.2011.11.002
Publication status	Published - Feb 1 2012

Keywords

Chromium-iron
Mixed oxides
Porous materials
Sol-gel preparation
Supercritical CO

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2011.11.002

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title = "Alkoxide-free sol-gel synthesis of aerogel iron-chromium mixed oxides with unique textural properties",

abstract = "Aerogel chromium-iron mixed oxide with equimolar amounts of both metals was prepared by a sol-gel method using nitrate salts of both metals. Propylene oxide was used as an efficient gelation promoter and supercritical CO 2 was employed for solvent extraction from the gel. The calcined mixed oxide showed significantly higher surface areas, larger pore volume, and enhanced thermal stability as compared with its xerogel counterpart and the corresponding single-metal oxides. Textural properties were compared at various calcination temperatures and unique textural properties were observed after calcinations at 350 °C.",

keywords = "Chromium-iron, Mixed oxides, Porous materials, Sol-gel preparation, Supercritical CO",

author = "Abbas Khaleel and Ali Al-Marzouqi",

note = "Funding Information: This work was financially supported by the College of Science, UAE University , Contract No. COS-IRG-13/11 .",

year = "2012",

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day = "1",

doi = "10.1016/j.matlet.2011.11.002",

language = "English",

volume = "68",

pages = "385--387",

journal = "Materials Letters",

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TY - JOUR

T1 - Alkoxide-free sol-gel synthesis of aerogel iron-chromium mixed oxides with unique textural properties

AU - Khaleel, Abbas

AU - Al-Marzouqi, Ali

N1 - Funding Information: This work was financially supported by the College of Science, UAE University , Contract No. COS-IRG-13/11 .

PY - 2012/2/1

Y1 - 2012/2/1

N2 - Aerogel chromium-iron mixed oxide with equimolar amounts of both metals was prepared by a sol-gel method using nitrate salts of both metals. Propylene oxide was used as an efficient gelation promoter and supercritical CO 2 was employed for solvent extraction from the gel. The calcined mixed oxide showed significantly higher surface areas, larger pore volume, and enhanced thermal stability as compared with its xerogel counterpart and the corresponding single-metal oxides. Textural properties were compared at various calcination temperatures and unique textural properties were observed after calcinations at 350 °C.

AB - Aerogel chromium-iron mixed oxide with equimolar amounts of both metals was prepared by a sol-gel method using nitrate salts of both metals. Propylene oxide was used as an efficient gelation promoter and supercritical CO 2 was employed for solvent extraction from the gel. The calcined mixed oxide showed significantly higher surface areas, larger pore volume, and enhanced thermal stability as compared with its xerogel counterpart and the corresponding single-metal oxides. Textural properties were compared at various calcination temperatures and unique textural properties were observed after calcinations at 350 °C.

KW - Chromium-iron

KW - Mixed oxides

KW - Porous materials

KW - Sol-gel preparation

KW - Supercritical CO

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U2 - 10.1016/j.matlet.2011.11.002

DO - 10.1016/j.matlet.2011.11.002

M3 - Article

AN - SCOPUS:82055185435

SN - 0167-577X

VL - 68

SP - 385

EP - 387

JO - Materials Letters

JF - Materials Letters

ER -

Alkoxide-free sol-gel synthesis of aerogel iron-chromium mixed oxides with unique textural properties

Abstract

Keywords

ASJC Scopus subject areas

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