Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation
Abstract Beyond photothermal conversion, the surface wettability of light-absorbing materials should be also determinative to the efficiency of solar-driven interfacial steam generation (SISG). Herein, by modifying hydrophobic Cu nanoparticles (NPs) with a hydrophilic carbon (C) shell, hydrophilic C...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Springer
2023-05-01
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| Series: | Carbon Neutrality |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s43979-023-00051-x |
| _version_ | 1797831898901250048 |
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| author | Yubo Tan Hui Jin Samuel S. Mao Shaohua Shen |
| author_facet | Yubo Tan Hui Jin Samuel S. Mao Shaohua Shen |
| author_sort | Yubo Tan |
| collection | DOAJ |
| description | Abstract Beyond photothermal conversion, the surface wettability of light-absorbing materials should be also determinative to the efficiency of solar-driven interfacial steam generation (SISG). Herein, by modifying hydrophobic Cu nanoparticles (NPs) with a hydrophilic carbon (C) shell, hydrophilic Cu@C core–shell NPs were successfully fabricated and used for constructing evaporation films for SISG. In comparison to the film constructed with Cu NPs, the evaporation films constructed with Cu@C core–shell NPs exhibit much increased SISG efficiency, reaching 94.6% as high. Except for the localized surface plasmon resonance (LSPR) effect of Cu NPs ensuring the excellent photothermal conversion, it is experimentally and theoretically revealed that the surface wettability switching from hydrophobicity to hydrophilicity, as induced by C coating, is beneficial to heat transfer at the solid/liquid interface and water transport at the evaporative surface, thus improving the thermal-evaporation conversion performance for efficient SISG. However, the further thickened C shells would weaken the LSPR effect and hinder the interface heat and water transfer, leading to the decreased photothermal and thermal-evaporation conversion efficiencies, and thus the lowered SISG performances. This demonstration gives an alternative and promising access to the rational design of photothermal materials featured with switchable surface wettability ensuring interface heat and water transfer enhancement for efficient SISG. |
| first_indexed | 2024-04-09T13:59:07Z |
| format | Article |
| id | doaj.art-9ece7886e50e43e880f7d39330ff329f |
| institution | Directory Open Access Journal |
| issn | 2731-3948 |
| language | English |
| last_indexed | 2024-04-09T13:59:07Z |
| publishDate | 2023-05-01 |
| publisher | Springer |
| record_format | Article |
| series | Carbon Neutrality |
| spelling | doaj.art-9ece7886e50e43e880f7d39330ff329f2023-05-07T11:25:51ZengSpringerCarbon Neutrality2731-39482023-05-012111310.1007/s43979-023-00051-xSurface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generationYubo Tan0Hui Jin1Samuel S. Mao2Shaohua Shen3International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong UniversityInternational Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong UniversityDepartment of Mechanical Engineering, University of California at BerkeleyInternational Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong UniversityAbstract Beyond photothermal conversion, the surface wettability of light-absorbing materials should be also determinative to the efficiency of solar-driven interfacial steam generation (SISG). Herein, by modifying hydrophobic Cu nanoparticles (NPs) with a hydrophilic carbon (C) shell, hydrophilic Cu@C core–shell NPs were successfully fabricated and used for constructing evaporation films for SISG. In comparison to the film constructed with Cu NPs, the evaporation films constructed with Cu@C core–shell NPs exhibit much increased SISG efficiency, reaching 94.6% as high. Except for the localized surface plasmon resonance (LSPR) effect of Cu NPs ensuring the excellent photothermal conversion, it is experimentally and theoretically revealed that the surface wettability switching from hydrophobicity to hydrophilicity, as induced by C coating, is beneficial to heat transfer at the solid/liquid interface and water transport at the evaporative surface, thus improving the thermal-evaporation conversion performance for efficient SISG. However, the further thickened C shells would weaken the LSPR effect and hinder the interface heat and water transfer, leading to the decreased photothermal and thermal-evaporation conversion efficiencies, and thus the lowered SISG performances. This demonstration gives an alternative and promising access to the rational design of photothermal materials featured with switchable surface wettability ensuring interface heat and water transfer enhancement for efficient SISG.https://doi.org/10.1007/s43979-023-00051-xSurface wettabilityInterface heat transferPhotothermal conversionThermal-evaporation conversionSolar-driven interfacial steam generation |
| spellingShingle | Yubo Tan Hui Jin Samuel S. Mao Shaohua Shen Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation Carbon Neutrality Surface wettability Interface heat transfer Photothermal conversion Thermal-evaporation conversion Solar-driven interfacial steam generation |
| title | Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation |
| title_full | Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation |
| title_fullStr | Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation |
| title_full_unstemmed | Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation |
| title_short | Surface hydrophobicity-hydrophilicity switching induced interface heat and water transfer enhancement for high-efficiency solar steam generation |
| title_sort | surface hydrophobicity hydrophilicity switching induced interface heat and water transfer enhancement for high efficiency solar steam generation |
| topic | Surface wettability Interface heat transfer Photothermal conversion Thermal-evaporation conversion Solar-driven interfacial steam generation |
| url | https://doi.org/10.1007/s43979-023-00051-x |
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