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The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy

Transition metal dichalcogenides (TMCs) exhibit unique properties that make them of interest for catalysis, sensing or energy storage applications. However, few studies have been performed into nanofluids based on TMCs for heat transfer applications. In this study, nanofluids based on 2D-WS(2) are p...

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Autores principales: Martínez-Merino, Paloma, Sánchez-Coronilla, Antonio, Alcántara, Rodrigo, Martín, Elisa I., Carrillo-Berdugo, Iván, Gómez-Villarejo, Roberto, Navas, Javier
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7711475/
https://www.ncbi.nlm.nih.gov/pubmed/32443607
http://dx.doi.org/10.3390/nano10050970
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author Martínez-Merino, Paloma
Sánchez-Coronilla, Antonio
Alcántara, Rodrigo
Martín, Elisa I.
Carrillo-Berdugo, Iván
Gómez-Villarejo, Roberto
Navas, Javier
author_facet Martínez-Merino, Paloma
Sánchez-Coronilla, Antonio
Alcántara, Rodrigo
Martín, Elisa I.
Carrillo-Berdugo, Iván
Gómez-Villarejo, Roberto
Navas, Javier
author_sort Martínez-Merino, Paloma
collection PubMed
description Transition metal dichalcogenides (TMCs) exhibit unique properties that make them of interest for catalysis, sensing or energy storage applications. However, few studies have been performed into nanofluids based on TMCs for heat transfer applications. In this study, nanofluids based on 2D-WS(2) are prepared by liquid phase exfoliation to analyze their potential usage in concentrating solar power plants. Periodic-Density Functional Theory (DFT) calculations were performed to rationalize the success of the exfoliation process. The hydrogen bond interaction between the hydroxyl group from PEG, which acts as a surfactant, and the S atoms of the WS(2) surface stabilizes the nanosheets in the fluid. Electron localization function (ELF) analysis is indicative of the stability of the S–H interaction from WS(2) with the molecules of surfactant due to the tendency to interact through weak intermolecular forces of van der Waals solids. Moreover, improvements in thermal properties were also found. Isobaric specific heat increased by up to 10% and thermal conductivity improved by up to 37.3%. The high stability of the nanofluids and the thermal improvements were associated with the high surface area of WS(2) nanosheets. These results suggest that these nanofluids could be a promising heat transfer fluid in concentrating solar power plants.
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spelling pubmed-77114752020-12-04 The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy Martínez-Merino, Paloma Sánchez-Coronilla, Antonio Alcántara, Rodrigo Martín, Elisa I. Carrillo-Berdugo, Iván Gómez-Villarejo, Roberto Navas, Javier Nanomaterials (Basel) Article Transition metal dichalcogenides (TMCs) exhibit unique properties that make them of interest for catalysis, sensing or energy storage applications. However, few studies have been performed into nanofluids based on TMCs for heat transfer applications. In this study, nanofluids based on 2D-WS(2) are prepared by liquid phase exfoliation to analyze their potential usage in concentrating solar power plants. Periodic-Density Functional Theory (DFT) calculations were performed to rationalize the success of the exfoliation process. The hydrogen bond interaction between the hydroxyl group from PEG, which acts as a surfactant, and the S atoms of the WS(2) surface stabilizes the nanosheets in the fluid. Electron localization function (ELF) analysis is indicative of the stability of the S–H interaction from WS(2) with the molecules of surfactant due to the tendency to interact through weak intermolecular forces of van der Waals solids. Moreover, improvements in thermal properties were also found. Isobaric specific heat increased by up to 10% and thermal conductivity improved by up to 37.3%. The high stability of the nanofluids and the thermal improvements were associated with the high surface area of WS(2) nanosheets. These results suggest that these nanofluids could be a promising heat transfer fluid in concentrating solar power plants. MDPI 2020-05-18 /pmc/articles/PMC7711475/ /pubmed/32443607 http://dx.doi.org/10.3390/nano10050970 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Martínez-Merino, Paloma
Sánchez-Coronilla, Antonio
Alcántara, Rodrigo
Martín, Elisa I.
Carrillo-Berdugo, Iván
Gómez-Villarejo, Roberto
Navas, Javier
The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy
title The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy
title_full The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy
title_fullStr The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy
title_full_unstemmed The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy
title_short The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy
title_sort role of the interactions at the tungsten disulphide surface in the stability and enhanced thermal properties of nanofluids with application in solar thermal energy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7711475/
https://www.ncbi.nlm.nih.gov/pubmed/32443607
http://dx.doi.org/10.3390/nano10050970
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