First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof

Abstract Experiments involving the irradiation of water contained within magnesium hydroxide and alumina nanoparticle sludges were conducted and culminated in observations of an increased yield of molecular hydrogen when compared to the yield from the irradiation of bulk water. We show that there is...

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Autores principales:	Mel O’Leary, Aliaksandr Baidak, Martyn Barnes, Thomas Donoclift, Christopher Emerson, Catarina Figueira, Oliver Fox, Annette Kleppe, Aaron McCulloch, Darryl Messer, Robin Orr, Fred Currell
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3228481b5df84af9a1408f61756aa213
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spelling	oai:doaj.org-article:3228481b5df84af9a1408f61756aa2132021-11-28T12:19:24ZFirst observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof10.1038/s41598-021-01868-12045-2322https://doaj.org/article/3228481b5df84af9a1408f61756aa2132021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01868-1https://doaj.org/toc/2045-2322Abstract Experiments involving the irradiation of water contained within magnesium hydroxide and alumina nanoparticle sludges were conducted and culminated in observations of an increased yield of molecular hydrogen when compared to the yield from the irradiation of bulk water. We show that there is a relationship linking this increased yield to the direct nanoscale ionization mechanism in the nanoparticles, indicating that electron emission from the nanoparticles drives new radiative pathways in the water. Because the chemical changes in these sludges are introduced by irradiation only, we have a genuinely unstirred system. This feature allows us to determine the diffusivity of the dissolved gas. Using the measured gas production rate, we have developed a method for modelling when hydrogen bubble formation will occur within the nanoparticle sludges. This model facilitates the determination of a consistent radiolytic consumption rate coinciding with the observations of bubble formation. Thus, we demonstrate a nanoscale radiation effect directly influencing the formation of molecular hydrogen.Mel O’LearyAliaksandr BaidakMartyn BarnesThomas DonocliftChristopher EmersonCatarina FigueiraOliver FoxAnnette KleppeAaron McCullochDarryl MesserRobin OrrFred CurrellNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mel O’Leary Aliaksandr Baidak Martyn Barnes Thomas Donoclift Christopher Emerson Catarina Figueira Oliver Fox Annette Kleppe Aaron McCulloch Darryl Messer Robin Orr Fred Currell First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
description	Abstract Experiments involving the irradiation of water contained within magnesium hydroxide and alumina nanoparticle sludges were conducted and culminated in observations of an increased yield of molecular hydrogen when compared to the yield from the irradiation of bulk water. We show that there is a relationship linking this increased yield to the direct nanoscale ionization mechanism in the nanoparticles, indicating that electron emission from the nanoparticles drives new radiative pathways in the water. Because the chemical changes in these sludges are introduced by irradiation only, we have a genuinely unstirred system. This feature allows us to determine the diffusivity of the dissolved gas. Using the measured gas production rate, we have developed a method for modelling when hydrogen bubble formation will occur within the nanoparticle sludges. This model facilitates the determination of a consistent radiolytic consumption rate coinciding with the observations of bubble formation. Thus, we demonstrate a nanoscale radiation effect directly influencing the formation of molecular hydrogen.
format	article
author	Mel O’Leary Aliaksandr Baidak Martyn Barnes Thomas Donoclift Christopher Emerson Catarina Figueira Oliver Fox Annette Kleppe Aaron McCulloch Darryl Messer Robin Orr Fred Currell
author_facet	Mel O’Leary Aliaksandr Baidak Martyn Barnes Thomas Donoclift Christopher Emerson Catarina Figueira Oliver Fox Annette Kleppe Aaron McCulloch Darryl Messer Robin Orr Fred Currell
author_sort	Mel O’Leary
title	First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
title_short	First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
title_full	First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
title_fullStr	First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
title_full_unstemmed	First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
title_sort	first observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3228481b5df84af9a1408f61756aa213
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First observation of radiolytic bubble formation in unstirred nano-powder sludges and a consistent model thereof

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