On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

Abstract Nanoparticles have been used in thermal applications to increase the specific heat of the molten salts used in Concentrated Solar Power plants for thermal energy storage. Although several mechanisms for abnormal enhancement have been proposed, they are still being investigated and more rese...

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Autores principales:	Rosa Mondragón, J. Enrique Juliá, Luis Cabedo, Nuria Navarrete
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6879404efe8d404595196ebf34d53f15
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spelling	oai:doaj.org-article:6879404efe8d404595196ebf34d53f152021-12-02T11:40:24ZOn the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles10.1038/s41598-018-25945-02045-2322https://doaj.org/article/6879404efe8d404595196ebf34d53f152018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25945-0https://doaj.org/toc/2045-2322Abstract Nanoparticles have been used in thermal applications to increase the specific heat of the molten salts used in Concentrated Solar Power plants for thermal energy storage. Although several mechanisms for abnormal enhancement have been proposed, they are still being investigated and more research is necessary. However, this nanoparticle-salt interaction can also be found in chemical applications in which nanoparticles have proved suitable to be used as an adsorbent for nitrate removal given their high specific surface, reactivity and ionic exchange capacity. In this work, the ionic exchange capacity mechanism for the nanoparticles functionalization phenomenon was evaluated. The ionic exchange capacity of silica and alumina nanoparticles dispersed in lithium, sodium and potassium nitrates was measured. Fourier-transform infrared spectroscopy tests confirmed the adsorption of nitrate ions on the nanoparticle surface. A relationship between the ionic exchange capacity of nanoparticles and the specific heat enhancement of doped molten salts was proposed for the first time.Rosa MondragónJ. Enrique JuliáLuis CabedoNuria NavarreteNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rosa Mondragón J. Enrique Juliá Luis Cabedo Nuria Navarrete On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
description	Abstract Nanoparticles have been used in thermal applications to increase the specific heat of the molten salts used in Concentrated Solar Power plants for thermal energy storage. Although several mechanisms for abnormal enhancement have been proposed, they are still being investigated and more research is necessary. However, this nanoparticle-salt interaction can also be found in chemical applications in which nanoparticles have proved suitable to be used as an adsorbent for nitrate removal given their high specific surface, reactivity and ionic exchange capacity. In this work, the ionic exchange capacity mechanism for the nanoparticles functionalization phenomenon was evaluated. The ionic exchange capacity of silica and alumina nanoparticles dispersed in lithium, sodium and potassium nitrates was measured. Fourier-transform infrared spectroscopy tests confirmed the adsorption of nitrate ions on the nanoparticle surface. A relationship between the ionic exchange capacity of nanoparticles and the specific heat enhancement of doped molten salts was proposed for the first time.
format	article
author	Rosa Mondragón J. Enrique Juliá Luis Cabedo Nuria Navarrete
author_facet	Rosa Mondragón J. Enrique Juliá Luis Cabedo Nuria Navarrete
author_sort	Rosa Mondragón
title	On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
title_short	On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
title_full	On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
title_fullStr	On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
title_full_unstemmed	On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
title_sort	on the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/6879404efe8d404595196ebf34d53f15
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On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

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