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Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots

[Image: see text] Eutectic molten salts are the most studied medium-high temperature thermal energy storage material due to their potential use in concentrated solar power plants. The aim of this work is to investigate the effect of using reduced graphene oxide (RGO) and graphene quantum dots (GQDs)...

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Autores principales: Hamdy, Esraa, Saad, Laila, Abulfotuh, Fuad, Soliman, Moataz, Ebrahim, Shaker
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7469128/
https://www.ncbi.nlm.nih.gov/pubmed/32905410
http://dx.doi.org/10.1021/acsomega.0c01291
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author Hamdy, Esraa
Saad, Laila
Abulfotuh, Fuad
Soliman, Moataz
Ebrahim, Shaker
author_facet Hamdy, Esraa
Saad, Laila
Abulfotuh, Fuad
Soliman, Moataz
Ebrahim, Shaker
author_sort Hamdy, Esraa
collection PubMed
description [Image: see text] Eutectic molten salts are the most studied medium-high temperature thermal energy storage material due to their potential use in concentrated solar power plants. The aim of this work is to investigate the effect of using reduced graphene oxide (RGO) and graphene quantum dots (GQDs) on the thermal properties of eutectic molten salts. A binary nitrate eutectic mixture of NaNO(3) and KNO(3) was selected as a base material (BM) for nitrate/carbon-derivative composites. RGO and GQDs were individually mixed with the BM with different fractions ranged from 0.1 to 1.5 wt %. The results showed that RGO enhanced the thermal conductivity, heat of fusion, and total thermal energy storage capacity by 52.10%, 44.48%, and 10.44%, respectively. GQDs slightly improved the specific heat capacity for both solid and liquid phases by 2.53% and 3.13%, respectively. In addition, GQDs promoted the heat of fusion by 31.72% and raised the total TES capacity by 12.26%.
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spelling pubmed-74691282020-09-04 Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots Hamdy, Esraa Saad, Laila Abulfotuh, Fuad Soliman, Moataz Ebrahim, Shaker ACS Omega [Image: see text] Eutectic molten salts are the most studied medium-high temperature thermal energy storage material due to their potential use in concentrated solar power plants. The aim of this work is to investigate the effect of using reduced graphene oxide (RGO) and graphene quantum dots (GQDs) on the thermal properties of eutectic molten salts. A binary nitrate eutectic mixture of NaNO(3) and KNO(3) was selected as a base material (BM) for nitrate/carbon-derivative composites. RGO and GQDs were individually mixed with the BM with different fractions ranged from 0.1 to 1.5 wt %. The results showed that RGO enhanced the thermal conductivity, heat of fusion, and total thermal energy storage capacity by 52.10%, 44.48%, and 10.44%, respectively. GQDs slightly improved the specific heat capacity for both solid and liquid phases by 2.53% and 3.13%, respectively. In addition, GQDs promoted the heat of fusion by 31.72% and raised the total TES capacity by 12.26%. American Chemical Society 2020-08-20 /pmc/articles/PMC7469128/ /pubmed/32905410 http://dx.doi.org/10.1021/acsomega.0c01291 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Hamdy, Esraa
Saad, Laila
Abulfotuh, Fuad
Soliman, Moataz
Ebrahim, Shaker
Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots
title Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots
title_full Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots
title_fullStr Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots
title_full_unstemmed Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots
title_short Enhancement of Molten Nitrate Thermal Properties by Reduced Graphene Oxide and Graphene Quantum Dots
title_sort enhancement of molten nitrate thermal properties by reduced graphene oxide and graphene quantum dots
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7469128/
https://www.ncbi.nlm.nih.gov/pubmed/32905410
http://dx.doi.org/10.1021/acsomega.0c01291
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