Mechanistic investigation of electrostatic field-enhanced water evaporation

Investigations on external electrostatic field (EEF)-enhanced liquid water evaporation have been reported decades ago, which suggest that molecular alignment and polarization tuned by EEF accelerating the phase change process could be responsible for EEF-enhanced water evaporation. However, a detail...

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Main Authors: Fei, Jipeng, Ding, Bin, Koh, See Wee, Ge, Junyu, Wang, Xingli, Lee, Liquan, Sun, Zixu, Yao, Mengqi, Chen, Yonghao, Gao, Huajian, Li, Hong
Other Authors: School of Mechanical and Aerospace Engineering
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Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/153152
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1531522021-11-11T08:36:51Z Mechanistic investigation of electrostatic field-enhanced water evaporation Fei, Jipeng Ding, Bin Koh, See Wee Ge, Junyu Wang, Xingli Lee, Liquan Sun, Zixu Yao, Mengqi Chen, Yonghao Gao, Huajian Li, Hong School of Mechanical and Aerospace Engineering School of Chemical and Biomedical Engineering School of Electrical and Electronic Engineering Institute of High Performance Computing, A*STAR CNRS International NTU THALES Research Alliances Engineering::Environmental engineering::Water supply Engineering::Environmental engineering::Water treatment Electrostatic Feld Enhancement In Situ Raman Investigations on external electrostatic field (EEF)-enhanced liquid water evaporation have been reported decades ago, which suggest that molecular alignment and polarization tuned by EEF accelerating the phase change process could be responsible for EEF-enhanced water evaporation. However, a detailed study revealing the role of EEF in altering the intermolecular and intramolecular water structure is lacking. Herein, an EEF is proved to tune water state by accelerating the thermal movement of water molecules, lowering the molecular escaping energy, and loosening the hydrogen bond structure. The detailed mechanisms and field interactions (heat and electrostatic) are investigated by in situ Raman characterizations and molecular dynamic simulations, which reveal that an EEF can effectively reduce the free energy barrier of water evaporation and then increase the evaporated water molecule flux. As a proof of concept, an EEF is integrated into an interfacial two-dimentional solar steam generator, enhancing the efficiency by up to 15.6%. Similar to a catalyst lowing activation energy and enhancing kinetics of a chemical reaction, the EEF enhances water state tuning, lowers evaporation enthalpy, and then boosts steam generation rate with negligible additional energy consumption, which can serve as a generic method for water evaporation enhancement in water harvesting, purification, and beyond. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) Nanyang Technological University Published version This work was sup-ported by Nanyang Technological University under NAP award (Grant No. M408050000) and Singapore Ministry of Education Tier 1 program (Grant No. 2018-T1-001-051). B.D. and H.G. are grateful for a research start-up grant (002479-00001) from Nanyang Technological University and theAgency for Science, Technology and Research (A*STAR) as well as the useof the A*STAR Computational Resource Centre, Singapore (ACRC) andNational Supercomputing Centre, Singapore (NSCC). 2021-11-11T08:35:56Z 2021-11-11T08:35:56Z 2021 Journal Article Fei, J., Ding, B., Koh, S. W., Ge, J., Wang, X., Lee, L., Sun, Z., Yao, M., Chen, Y., Gao, H. & Li, H. (2021). Mechanistic investigation of electrostatic field-enhanced water evaporation. Advanced Science, 8(18), 2100875-. https://dx.doi.org/10.1002/advs.202100875 2198-3844 https://hdl.handle.net/10356/153152 10.1002/advs.202100875 18 8 2100875 en M408050000 2018-T1-001-051 002479-00001 Advanced Science © 2021 The Authors. Advanced Science published by Wiley-VCH GmbH.This is an open access article under the terms of the Creative CommonsAttribution License, which permits use, distribution and reproduction inany medium, provided the original work is properly cited. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering::Water supply
Engineering::Environmental engineering::Water treatment
Electrostatic Feld Enhancement
In Situ Raman
spellingShingle Engineering::Environmental engineering::Water supply
Engineering::Environmental engineering::Water treatment
Electrostatic Feld Enhancement
In Situ Raman
Fei, Jipeng
Ding, Bin
Koh, See Wee
Ge, Junyu
Wang, Xingli
Lee, Liquan
Sun, Zixu
Yao, Mengqi
Chen, Yonghao
Gao, Huajian
Li, Hong
Mechanistic investigation of electrostatic field-enhanced water evaporation
description Investigations on external electrostatic field (EEF)-enhanced liquid water evaporation have been reported decades ago, which suggest that molecular alignment and polarization tuned by EEF accelerating the phase change process could be responsible for EEF-enhanced water evaporation. However, a detailed study revealing the role of EEF in altering the intermolecular and intramolecular water structure is lacking. Herein, an EEF is proved to tune water state by accelerating the thermal movement of water molecules, lowering the molecular escaping energy, and loosening the hydrogen bond structure. The detailed mechanisms and field interactions (heat and electrostatic) are investigated by in situ Raman characterizations and molecular dynamic simulations, which reveal that an EEF can effectively reduce the free energy barrier of water evaporation and then increase the evaporated water molecule flux. As a proof of concept, an EEF is integrated into an interfacial two-dimentional solar steam generator, enhancing the efficiency by up to 15.6%. Similar to a catalyst lowing activation energy and enhancing kinetics of a chemical reaction, the EEF enhances water state tuning, lowers evaporation enthalpy, and then boosts steam generation rate with negligible additional energy consumption, which can serve as a generic method for water evaporation enhancement in water harvesting, purification, and beyond.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Fei, Jipeng
Ding, Bin
Koh, See Wee
Ge, Junyu
Wang, Xingli
Lee, Liquan
Sun, Zixu
Yao, Mengqi
Chen, Yonghao
Gao, Huajian
Li, Hong
format Article
author Fei, Jipeng
Ding, Bin
Koh, See Wee
Ge, Junyu
Wang, Xingli
Lee, Liquan
Sun, Zixu
Yao, Mengqi
Chen, Yonghao
Gao, Huajian
Li, Hong
author_sort Fei, Jipeng
title Mechanistic investigation of electrostatic field-enhanced water evaporation
title_short Mechanistic investigation of electrostatic field-enhanced water evaporation
title_full Mechanistic investigation of electrostatic field-enhanced water evaporation
title_fullStr Mechanistic investigation of electrostatic field-enhanced water evaporation
title_full_unstemmed Mechanistic investigation of electrostatic field-enhanced water evaporation
title_sort mechanistic investigation of electrostatic field-enhanced water evaporation
publishDate 2021
url https://hdl.handle.net/10356/153152
_version_ 1718368101846745088