Synthesis of mesoporous α-Fe<inf>2</inf>O<inf>3</inf> nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries

Sun, B; Horvat, J; Kim, HS; Kim, WS; Ahn, J; Wang, G

Synthesis of mesoporous α-Fe<inf>2</inf>O<inf>3</inf> nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries

Sun, B

Horvat, J Kim, HS Kim, WS Ahn, J Wang, G

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Publication Type:: Journal Article
Citation:: Journal of Physical Chemistry C, 2010, 114 (44), pp. 18753 - 18761
Issue Date:: 2010-11-11

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Field	Value	Language
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X	en_US
dc.contributor.author	Horvat, J	en_US
dc.contributor.author	Kim, HS	en_US
dc.contributor.author	Kim, WS	en_US
dc.contributor.author	Ahn, J	en_US
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578	en_US
dc.date.issued	2010-11-11	en_US
dc.identifier.citation	Journal of Physical Chemistry C, 2010, 114 (44), pp. 18753 - 18761	en_US
dc.identifier.issn	1932-7447	en_US
dc.identifier.uri	http://hdl.handle.net/10453/13133
dc.description.abstract	Mesoporous α-Fe2O3 materials were prepared in large quantity by the soft template synthesis method using the triblock copolymer surfactant F127 as the template. Nitrogen adsorption-desorption isothermal measurements and transmission electron microscope observation revealed that the as-prepared mesoporous α-Fe2O3 nanostructures have large mesopores in a wide size range of 5-30 nm. It has been found that the Morin transition depends on thermal history of mesoporous α-Fe2O3, which is driven by surface anisotropy. Superparamagnetic behavior of mesoporous α-Fe2O3 is also associated with surface spins with blocking temperature around 50 K. When applied as gas sensors, mesoporous α-Fe2O3 nanostructures exhibited high gas sensitivity toward acetic acid and ethanol gas. As anodes in lithium ion cells, mesoporous α-Fe2O 3 materials show a high specific capacity of 1360 mAh/g with excellent cycling stability and high rate capacity. © 2010 American Chemical Society.	en_US
dc.relation.ispartof	Journal of Physical Chemistry C	en_US
dc.relation.isbasedon	10.1021/jp102286e	en_US
dc.subject.classification	Physical Chemistry	en_US
dc.title	Synthesis of mesoporous α-Fe<inf>2</inf>O<inf>3</inf> nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries	en_US
dc.type	Journal Article
utslib.citation.volume	44	en_US
utslib.citation.volume	114	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
utslib.for	10 Technology	en_US
dc.location.activity	ISI:000283703500001	en_US
dc.location.activity	University of Warwick, Coventry
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	closed_access
pubs.issue	44	en_US
pubs.publication-status	Published	en_US
pubs.volume	114	en_US

Abstract:

Mesoporous α-Fe2O3 materials were prepared in large quantity by the soft template synthesis method using the triblock copolymer surfactant F127 as the template. Nitrogen adsorption-desorption isothermal measurements and transmission electron microscope observation revealed that the as-prepared mesoporous α-Fe2O3 nanostructures have large mesopores in a wide size range of 5-30 nm. It has been found that the Morin transition depends on thermal history of mesoporous α-Fe2O3, which is driven by surface anisotropy. Superparamagnetic behavior of mesoporous α-Fe2O3 is also associated with surface spins with blocking temperature around 50 K. When applied as gas sensors, mesoporous α-Fe2O3 nanostructures exhibited high gas sensitivity toward acetic acid and ethanol gas. As anodes in lithium ion cells, mesoporous α-Fe2O 3 materials show a high specific capacity of 1360 mAh/g with excellent cycling stability and high rate capacity. © 2010 American Chemical Society.

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http://hdl.handle.net/10453/13133