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Synthesis of mesoporous r-Fe2O3 nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries

Journal Article


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Abstract


  • Mesoporous alpha-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 alpha-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 alpha-Fe2O3, which is driven by surface anisotropy. Superparamagnetic behavior of mesoporous alpha-Fe2O3 is also associated with surface spins with blocking temperature around 50 K. When applied as gas sensors, mesoporous R-Fe2O3 nanostructures exhibited high gas sensitivity toward acetic acid and ethanol gas. As anodes in lithium ion cells, mesoporous alpha-Fe2O3 materials

    show a high specific capacity of 1360 mAh/g with excellent cycling stability and high rate capacity.

Authors


  •   Sun, Bing (external author)
  •   Horvat, Josip
  •   Kim, Hyun-Soo (external author)
  •   Kim, Woo-Seong (external author)
  •   Ahn, Jung-Ho (external author)
  •   Wang, Guoxiu

Publication Date


  • 2010

Citation


  • Sun, B., Horvat, J., Kim, H., Kim, W., Ahn, P. & Wang, G. (2010). Synthesis of mesoporous r-Fe2O3 nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 114 (44), 18753-18761.

Scopus Eid


  • 2-s2.0-78149269109

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8448&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5516

Number Of Pages


  • 8

Start Page


  • 18753

End Page


  • 18761

Volume


  • 114

Issue


  • 44

Abstract


  • Mesoporous alpha-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 alpha-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 alpha-Fe2O3, which is driven by surface anisotropy. Superparamagnetic behavior of mesoporous alpha-Fe2O3 is also associated with surface spins with blocking temperature around 50 K. When applied as gas sensors, mesoporous R-Fe2O3 nanostructures exhibited high gas sensitivity toward acetic acid and ethanol gas. As anodes in lithium ion cells, mesoporous alpha-Fe2O3 materials

    show a high specific capacity of 1360 mAh/g with excellent cycling stability and high rate capacity.

Authors


  •   Sun, Bing (external author)
  •   Horvat, Josip
  •   Kim, Hyun-Soo (external author)
  •   Kim, Woo-Seong (external author)
  •   Ahn, Jung-Ho (external author)
  •   Wang, Guoxiu

Publication Date


  • 2010

Citation


  • Sun, B., Horvat, J., Kim, H., Kim, W., Ahn, P. & Wang, G. (2010). Synthesis of mesoporous r-Fe2O3 nanostructures for highly sensitive gas sensors and high capacity anode materials in lithium ion batteries. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 114 (44), 18753-18761.

Scopus Eid


  • 2-s2.0-78149269109

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8448&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5516

Number Of Pages


  • 8

Start Page


  • 18753

End Page


  • 18761

Volume


  • 114

Issue


  • 44