Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite: High-pressure metal oxide polymorph surviving ambient conditions

Josef Pola; Mohammed A. Gondal; Markéta Urbanová; Dana Pokorná; Husain M. Masoudi; Snejana Bakardjieva; Zdeněk Bastl; Jan Šubrt; Mohammad N. Siddiqui

doi:10.1016/j.jphotochem.2012.06.006

Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite: High-pressure metal oxide polymorph surviving ambient conditions

Josef Pola^*, Mohammed A. Gondal, Markéta Urbanová, Dana Pokorná, Husain M. Masoudi, Snejana Bakardjieva, Zdeněk Bastl, Jan Šubrt, Mohammad N. Siddiqui

^*Corresponding author for this work

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

2 Scopus citations

Abstract

UV laser-induced gas-phase photolysis of Fe(CO)₅ results in deposition of Fe/C/O nanocomposite film which was analyzed by Raman, Fourier transform infrared, X-ray photoelectron and laser-induced breakdown spectroscopy and electron microscopy. The nanocomposite film was revealed as an amorphous phase composed of iron oxides (FeO and Fe₂O₃) and carbonaceous constituents possessing CO and CO bonds. This phase contains crystalline nanograins of ambient cubic and high-pressure orthorhombic magnetite. The survival of the high-pressure Fe₃O₄ nanograins at ambient conditions is tentatively ascribed to their Laplace pressure and/or to stabilizing effect of the amorphous Fe/C/O phase. The o-Fe₃O₄ nanograins represent a very rare example of high-pressure nanosized polymorph surviving at ambient conditions and not retrieving ambient-pressure-stable phase upon decompression.

Original language	English
Pages (from-to)	33-40
Number of pages	8
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	243
DOIs	https://doi.org/10.1016/j.jphotochem.2012.06.006
State	Published - 1 Sep 2012

Bibliographical note

Funding Information:
This work was supported by King Fahd University of Petroleum & Minerals (project no. IN090025 ). Thanks are also due to Dr. Bezdička for XRD analysis.

Keywords

Amorphous Fe/C/O composite
High-pressure FeO polymorph
Iron pentacarbonyl
UV laser photolysis

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

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10.1016/j.jphotochem.2012.06.006

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Pola, J., Gondal, M. A., Urbanová, M., Pokorná, D., Masoudi, H. M., Bakardjieva, S., Bastl, Z., Šubrt, J., & Siddiqui, M. N. (2012). Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite: High-pressure metal oxide polymorph surviving ambient conditions. Journal of Photochemistry and Photobiology A: Chemistry, 243, 33-40. https://doi.org/10.1016/j.jphotochem.2012.06.006

@article{3bd097536fbe444195ddcc950c0480fa,

title = "Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite: High-pressure metal oxide polymorph surviving ambient conditions",

abstract = "UV laser-induced gas-phase photolysis of Fe(CO)5 results in deposition of Fe/C/O nanocomposite film which was analyzed by Raman, Fourier transform infrared, X-ray photoelectron and laser-induced breakdown spectroscopy and electron microscopy. The nanocomposite film was revealed as an amorphous phase composed of iron oxides (FeO and Fe2O3) and carbonaceous constituents possessing CO and CO bonds. This phase contains crystalline nanograins of ambient cubic and high-pressure orthorhombic magnetite. The survival of the high-pressure Fe3O4 nanograins at ambient conditions is tentatively ascribed to their Laplace pressure and/or to stabilizing effect of the amorphous Fe/C/O phase. The o-Fe3O4 nanograins represent a very rare example of high-pressure nanosized polymorph surviving at ambient conditions and not retrieving ambient-pressure-stable phase upon decompression.",

keywords = "Amorphous Fe/C/O composite, High-pressure FeO polymorph, Iron pentacarbonyl, UV laser photolysis",

author = "Josef Pola and Gondal, \{Mohammed A.\} and Mark{\'e}ta Urbanov{\'a} and Dana Pokorn{\'a} and Masoudi, \{Husain M.\} and Snejana Bakardjieva and Zden{\v e}k Bastl and Jan {\v S}ubrt and Siddiqui, \{Mohammad N.\}",

note = "Funding Information: This work was supported by King Fahd University of Petroleum \& Minerals (project no. IN090025 ). Thanks are also due to Dr. Bezdi{\v c}ka for XRD analysis.",

year = "2012",

month = sep,

day = "1",

doi = "10.1016/j.jphotochem.2012.06.006",

language = "English",

volume = "243",

pages = "33--40",

journal = "Journal of Photochemistry and Photobiology A: Chemistry",

issn = "1010-6030",

publisher = "Elsevier B.V.",

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Pola, J, Gondal, MA, Urbanová, M, Pokorná, D, Masoudi, HM, Bakardjieva, S, Bastl, Z, Šubrt, J & Siddiqui, MN 2012, 'Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite: High-pressure metal oxide polymorph surviving ambient conditions', Journal of Photochemistry and Photobiology A: Chemistry, vol. 243, pp. 33-40. https://doi.org/10.1016/j.jphotochem.2012.06.006

TY - JOUR

T1 - Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite

T2 - High-pressure metal oxide polymorph surviving ambient conditions

AU - Pola, Josef

AU - Gondal, Mohammed A.

AU - Urbanová, Markéta

AU - Pokorná, Dana

AU - Masoudi, Husain M.

AU - Bakardjieva, Snejana

AU - Bastl, Zdeněk

AU - Šubrt, Jan

AU - Siddiqui, Mohammad N.

N1 - Funding Information: This work was supported by King Fahd University of Petroleum & Minerals (project no. IN090025 ). Thanks are also due to Dr. Bezdička for XRD analysis.

PY - 2012/9/1

Y1 - 2012/9/1

N2 - UV laser-induced gas-phase photolysis of Fe(CO)5 results in deposition of Fe/C/O nanocomposite film which was analyzed by Raman, Fourier transform infrared, X-ray photoelectron and laser-induced breakdown spectroscopy and electron microscopy. The nanocomposite film was revealed as an amorphous phase composed of iron oxides (FeO and Fe2O3) and carbonaceous constituents possessing CO and CO bonds. This phase contains crystalline nanograins of ambient cubic and high-pressure orthorhombic magnetite. The survival of the high-pressure Fe3O4 nanograins at ambient conditions is tentatively ascribed to their Laplace pressure and/or to stabilizing effect of the amorphous Fe/C/O phase. The o-Fe3O4 nanograins represent a very rare example of high-pressure nanosized polymorph surviving at ambient conditions and not retrieving ambient-pressure-stable phase upon decompression.

AB - UV laser-induced gas-phase photolysis of Fe(CO)5 results in deposition of Fe/C/O nanocomposite film which was analyzed by Raman, Fourier transform infrared, X-ray photoelectron and laser-induced breakdown spectroscopy and electron microscopy. The nanocomposite film was revealed as an amorphous phase composed of iron oxides (FeO and Fe2O3) and carbonaceous constituents possessing CO and CO bonds. This phase contains crystalline nanograins of ambient cubic and high-pressure orthorhombic magnetite. The survival of the high-pressure Fe3O4 nanograins at ambient conditions is tentatively ascribed to their Laplace pressure and/or to stabilizing effect of the amorphous Fe/C/O phase. The o-Fe3O4 nanograins represent a very rare example of high-pressure nanosized polymorph surviving at ambient conditions and not retrieving ambient-pressure-stable phase upon decompression.

KW - Amorphous Fe/C/O composite

KW - High-pressure FeO polymorph

KW - Iron pentacarbonyl

KW - UV laser photolysis

UR - https://www.scopus.com/pages/publications/84863489692

U2 - 10.1016/j.jphotochem.2012.06.006

DO - 10.1016/j.jphotochem.2012.06.006

M3 - Article

AN - SCOPUS:84863489692

SN - 1010-6030

VL - 243

SP - 33

EP - 40

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

ER -

Laser photochemical deposition of magnetite nanograins in a-Fe/C/O composite: High-pressure metal oxide polymorph surviving ambient conditions

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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