KFU. Card publication. Gamma-Iron Phase Stabilized at Room Temperature by Thermally Processed Graphene Oxide

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FEDERAL UNIVERSITY

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GAMMA-IRON PHASE STABILIZED AT ROOM TEMPERATURE BY THERMALLY PROCESSED GRAPHENE OXIDE

Form of presentation

Articles in international journals and collections

Year of publication

2018

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Authors, employees of KFU

Vagizov Farit Gabdulkhakovich, author

Valimukhametova Alina Restemovna, author

Dimiev Ayrat Maratovich, author

Kiyamov Ayrat Gazinurovich, author

Tayurskiy Dmitriy Albertovich, author

Khannanov Artur Aydarovich, author

Bibliographic description in the original language

Khannanov A. Gamma-Iron Phase Stabilized at Room Temperature by Thermally Processed Graphene Oxide / A. Khannanov, A. Kiiamov, A. Valimukhametova [at al.] // J. Am. Chem. Soc. – 2018. – V.140, No. 29. – P. 9051-9055.

Annotation

Stabilizing nanoparticles on surfaces, such as graphene, is a growing field of research. Thereby, iron particle stabilization on carbon materials is attractive and finds applications in charge-storage devices, catalysis, and others. In this work, we describe the discovery of iron nano-particles with the face-centered cubic structure that was postulated not to exist at ambient conditions. In bulk, the y-iron phase is formed only above 917 ?C, and transforms back to the thermodynamically favored a-phase upon cooling. Here, with X-ray diffraction and Mossbauer spectroscopy we unambiguously demonstrate the unexpected RT stability of the y-phase of iron in the form of the nanoparticles with low carbon content from 0.60% through 0.93%. The nanoparticles have controllable diameter range from 30 nm through 200 nm. They are stabilized by a layer of Fe/C solid solution on the surface, serving as the buffer controlling carbon content in the core, and by layer graphene as an outermost shell.

Keywords

graphene oxide, gamma-iron, X-ray diffraction, Mossbauer spectroscopy

The name of the journal

J AM CHEM SOC

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/131893/jacs.8b04829.pdf?sequence=1&isAllowed=y

URL

https://pubs.acs.org/doi/10.1021/jacs.8b04829

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=183967&p_lang=2

Resource files

File name	Size (MB)	Format
jacs.8b04829.pdf	4,47	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Vagizov Farit Gabdulkhakovich	ru_RU
dc.contributor.author	Valimukhametova Alina Restemovna	ru_RU
dc.contributor.author	Dimiev Ayrat Maratovich	ru_RU
dc.contributor.author	Kiyamov Ayrat Gazinurovich	ru_RU
dc.contributor.author	Tayurskiy Dmitriy Albertovich	ru_RU
dc.contributor.author	Khannanov Artur Aydarovich	ru_RU
dc.date.accessioned	2018-01-01T00:00:00Z	ru_RU
dc.date.available	2018-01-01T00:00:00Z	ru_RU
dc.date.issued	2018	ru_RU
dc.identifier.citation	Khannanov A. Gamma-Iron Phase Stabilized at Room Temperature by Thermally Processed Graphene Oxide / A. Khannanov, A. Kiiamov, A. Valimukhametova [at al.] // J. Am. Chem. Soc. – 2018. – V.140, No. 29. – P. 9051-9055.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=183967&p_lang=2	ru_RU
dc.description.abstract	J AM CHEM SOC	ru_RU
dc.description.abstract	Stabilizing nanoparticles on surfaces, such as graphene, is a growing field of research. Thereby, iron particle stabilization on carbon materials is attractive and finds applications in charge-storage devices, catalysis, and others. In this work, we describe the discovery of iron nano-particles with the face-centered cubic structure that was postulated not to exist at ambient conditions. In bulk, the y-iron phase is formed only above 917 ?C, and transforms back to the thermodynamically favored a-phase upon cooling. Here, with X-ray diffraction and Mossbauer spectroscopy we unambiguously demonstrate the unexpected RT stability of the y-phase of iron in the form of the nanoparticles with low carbon content from 0.60% through 0.93%. The nanoparticles have controllable diameter range from 30 nm through 200 nm. They are stabilized by a layer of Fe/C solid solution on the surface, serving as the buffer controlling carbon content in the core, and by layer graphene as an outermost shell.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	graphene oxide	ru_RU
dc.subject	gamma-iron	ru_RU
dc.subject	X-ray diffraction	ru_RU
dc.subject	Mossbauer spectroscopy	ru_RU
dc.title	Gamma-Iron Phase Stabilized at Room Temperature by Thermally Processed Graphene Oxide	ru_RU
dc.type	Articles in international journals and collections	ru_RU