A high-efficient and salt-rejecting 2D film for photothermal evaporation
Summary: The solar-driven desalination is seen as a sustainable way to combat water scarcity. However, the solar steam generation efficiency has long been restricted by the high vaporization enthalpy of water and low energy density of natural sunlight. We introduced graphene oxide (GO) cross-linked...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004223014244 |
| _version_ | 1797770067737313280 |
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| author | Yiru Su Lang Liu Xuechao Gao Wei Yu Ye Hong Chao Liu |
| author_facet | Yiru Su Lang Liu Xuechao Gao Wei Yu Ye Hong Chao Liu |
| author_sort | Yiru Su |
| collection | DOAJ |
| description | Summary: The solar-driven desalination is seen as a sustainable way to combat water scarcity. However, the solar steam generation efficiency has long been restricted by the high vaporization enthalpy of water and low energy density of natural sunlight. We introduced graphene oxide (GO) cross-linked with polyethyleneimine (PEI) as the photothermal material, with the enriched ammonic functional groups in modified GO membrane (GPM) activating water molecules to evaporate with much lower energy consumption. The vaporization enthalpy at the air-film interface is reduced up to 42% in GPM film by tuning the thermodynamic states of water. Consequently, GPM film enables a high evaporation rate of 2.48 kg m−2 h−1 with 95.7% energy conversion efficiency under 1 sun. With the aid of positive charges introduced by hydrolysis of PEI, the GPM exhibits excellent salt resistance and delivers an evaporation rate around 1.8 kg m−2 h−1 when treating 20 wt % NaCl solution. |
| first_indexed | 2024-03-12T21:18:05Z |
| format | Article |
| id | doaj.art-a6c8c7db58f5459288d802f48fa4f43d |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-03-12T21:18:05Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-a6c8c7db58f5459288d802f48fa4f43d2023-07-29T04:35:44ZengElsevieriScience2589-00422023-08-01268107347A high-efficient and salt-rejecting 2D film for photothermal evaporationYiru Su0Lang Liu1Xuechao Gao2Wei Yu3Ye Hong4Chao Liu5Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China; Corresponding authorState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhu Road(S), Nanjing 210009, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, ChinaDepartment of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China; Corresponding authorKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, ChinaSummary: The solar-driven desalination is seen as a sustainable way to combat water scarcity. However, the solar steam generation efficiency has long been restricted by the high vaporization enthalpy of water and low energy density of natural sunlight. We introduced graphene oxide (GO) cross-linked with polyethyleneimine (PEI) as the photothermal material, with the enriched ammonic functional groups in modified GO membrane (GPM) activating water molecules to evaporate with much lower energy consumption. The vaporization enthalpy at the air-film interface is reduced up to 42% in GPM film by tuning the thermodynamic states of water. Consequently, GPM film enables a high evaporation rate of 2.48 kg m−2 h−1 with 95.7% energy conversion efficiency under 1 sun. With the aid of positive charges introduced by hydrolysis of PEI, the GPM exhibits excellent salt resistance and delivers an evaporation rate around 1.8 kg m−2 h−1 when treating 20 wt % NaCl solution.http://www.sciencedirect.com/science/article/pii/S2589004223014244Optical materialsEnergy engineeringMaterials science |
| spellingShingle | Yiru Su Lang Liu Xuechao Gao Wei Yu Ye Hong Chao Liu A high-efficient and salt-rejecting 2D film for photothermal evaporation iScience Optical materials Energy engineering Materials science |
| title | A high-efficient and salt-rejecting 2D film for photothermal evaporation |
| title_full | A high-efficient and salt-rejecting 2D film for photothermal evaporation |
| title_fullStr | A high-efficient and salt-rejecting 2D film for photothermal evaporation |
| title_full_unstemmed | A high-efficient and salt-rejecting 2D film for photothermal evaporation |
| title_short | A high-efficient and salt-rejecting 2D film for photothermal evaporation |
| title_sort | high efficient and salt rejecting 2d film for photothermal evaporation |
| topic | Optical materials Energy engineering Materials science |
| url | http://www.sciencedirect.com/science/article/pii/S2589004223014244 |
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