TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation

Abstract Electron irradiation of Ni–Fe layered double hydroxides (LDHs) was investigated in the transmission electron microscope (TEM). The initial structure possessed a flat hexagonal morphology made up of crystalline domains with a well-defined hexagonal crystal structure. The Ni–Fe LDHs were susc...

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Autores principales:	Christopher Hobbs, Clive Downing, Sonia Jaskaniec, Valeria Nicolosi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/7afe3a9e8c8d422986a7c5032936a492
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spelling	oai:doaj.org-article:7afe3a9e8c8d422986a7c5032936a4922021-12-02T16:27:14ZTEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation10.1038/s41699-021-00212-52397-7132https://doaj.org/article/7afe3a9e8c8d422986a7c5032936a4922021-03-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00212-5https://doaj.org/toc/2397-7132Abstract Electron irradiation of Ni–Fe layered double hydroxides (LDHs) was investigated in the transmission electron microscope (TEM). The initial structure possessed a flat hexagonal morphology made up of crystalline domains with a well-defined hexagonal crystal structure. The Ni–Fe LDHs were susceptible to significant structural decompositions during electron irradiation. The generation of pores and crystallographic breakdown of the LDH routinely occurred. In addition, a compositional change was established by electron energy loss spectroscopy (EELS). During 300 kV irradiation, a pre-peak evolution in the oxygen K edge highlighted a transition to metal oxide species. In parallel, nitrogen K edge attenuation demonstrated interlayer mass-losses. It was found that TEM conditions profoundly affected the decomposition behaviours. At lower acceleration voltages, an increased dehydration rate of the LDH cationic layers is observed during irradiaton. Moreover, in situ specimen cooling revealed the retention of interlayer nitrates. An emphasis on the dehydroxylation processes and anionic mass-loss facilitation is discussed.Christopher HobbsClive DowningSonia JaskaniecValeria NicolosiNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 Christopher Hobbs Clive Downing Sonia Jaskaniec Valeria Nicolosi TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation
description	Abstract Electron irradiation of Ni–Fe layered double hydroxides (LDHs) was investigated in the transmission electron microscope (TEM). The initial structure possessed a flat hexagonal morphology made up of crystalline domains with a well-defined hexagonal crystal structure. The Ni–Fe LDHs were susceptible to significant structural decompositions during electron irradiation. The generation of pores and crystallographic breakdown of the LDH routinely occurred. In addition, a compositional change was established by electron energy loss spectroscopy (EELS). During 300 kV irradiation, a pre-peak evolution in the oxygen K edge highlighted a transition to metal oxide species. In parallel, nitrogen K edge attenuation demonstrated interlayer mass-losses. It was found that TEM conditions profoundly affected the decomposition behaviours. At lower acceleration voltages, an increased dehydration rate of the LDH cationic layers is observed during irradiaton. Moreover, in situ specimen cooling revealed the retention of interlayer nitrates. An emphasis on the dehydroxylation processes and anionic mass-loss facilitation is discussed.
format	article
author	Christopher Hobbs Clive Downing Sonia Jaskaniec Valeria Nicolosi
author_facet	Christopher Hobbs Clive Downing Sonia Jaskaniec Valeria Nicolosi
author_sort	Christopher Hobbs
title	TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation
title_short	TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation
title_full	TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation
title_fullStr	TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation
title_full_unstemmed	TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation
title_sort	tem and eels characterization of ni–fe layered double hydroxide decompositions caused by electron beam irradiation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7afe3a9e8c8d422986a7c5032936a492
work_keys_str_mv	AT christopherhobbs temandeelscharacterizationofnifelayereddoublehydroxidedecompositionscausedbyelectronbeamirradiation AT clivedowning temandeelscharacterizationofnifelayereddoublehydroxidedecompositionscausedbyelectronbeamirradiation AT soniajaskaniec temandeelscharacterizationofnifelayereddoublehydroxidedecompositionscausedbyelectronbeamirradiation AT valerianicolosi temandeelscharacterizationofnifelayereddoublehydroxidedecompositionscausedbyelectronbeamirradiation
_version_	1718383999228837888

TEM and EELS characterization of Ni–Fe layered double hydroxide decompositions caused by electron beam irradiation

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