Anti-biofouling double-layered unidirectional scaffold for long-term solar-driven water evaporation

To meet the demand for clean water, solar-driven water evaporation has recently drawn growing attention due to the high efficiency and environment-friendly procedure. For the transportation of water, these evaporation devices mostly possess porous structures. However, for long-term use in the natura...

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Veröffentlicht in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (28), p.16696-1673
Hauptverfasser: Wang, Xiang-Ying, Xue, Jingzhe, Ma, Chunfeng, He, Tao, Qian, Haisheng, Wang, Bao, Liu, Jianwei, Lu, Yang
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container_end_page 1673
container_issue 28
container_start_page 16696
container_title Journal of materials chemistry. A, Materials for energy and sustainability
container_volume 7
creator Wang, Xiang-Ying
Xue, Jingzhe
Ma, Chunfeng
He, Tao
Qian, Haisheng
Wang, Bao
Liu, Jianwei
Lu, Yang
description To meet the demand for clean water, solar-driven water evaporation has recently drawn growing attention due to the high efficiency and environment-friendly procedure. For the transportation of water, these evaporation devices mostly possess porous structures. However, for long-term use in the natural environment, it is highly required to prevent biofouling induced channel plugging due to the universal existence of microbes in the natural water. Herein, we fabricated a double-layered GO-chitosan/ZnO scaffold (GCZ scaffold) as the solar steam device. The upper GO aerogel layer serves as a solar thermal converter, while the lower chitosan/ZnO composite layer serves as a unidirectional water pump. This GCZ scaffold exhibits a high water evaporation rate and good solar energy conversion efficiency under 10 sun and one sun irradiations, respectively. Moreover, the embedding of ZnO nanoparticles in the lower chitosan layer effectively controls the formation of biofilms in the unidirectional channels, resulting in an anti-biofouling solar-driven water evaporator. Compared to the ZnO-free scaffold suffering from the biofouling induced channel plugging, this anti-biofouling GCZ scaffold maintains a high solar-driven water evaporation rate and efficiency (89.4% for E. coli and 89.7% for S. aureus ) even after cultivating in the bacterial suspensions for 3 days. This anti-biofouling solar-driven water evaporator evidently improves the lifetime of the material in natural water, conducive to further commercial applications. An anti-biofouling double layered GCZ scaffold is fabricated as a long-term stable solar-driven steam generation device in bacteria-containing actual environment.
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For the transportation of water, these evaporation devices mostly possess porous structures. However, for long-term use in the natural environment, it is highly required to prevent biofouling induced channel plugging due to the universal existence of microbes in the natural water. Herein, we fabricated a double-layered GO-chitosan/ZnO scaffold (GCZ scaffold) as the solar steam device. The upper GO aerogel layer serves as a solar thermal converter, while the lower chitosan/ZnO composite layer serves as a unidirectional water pump. This GCZ scaffold exhibits a high water evaporation rate and good solar energy conversion efficiency under 10 sun and one sun irradiations, respectively. Moreover, the embedding of ZnO nanoparticles in the lower chitosan layer effectively controls the formation of biofilms in the unidirectional channels, resulting in an anti-biofouling solar-driven water evaporator. Compared to the ZnO-free scaffold suffering from the biofouling induced channel plugging, this anti-biofouling GCZ scaffold maintains a high solar-driven water evaporation rate and efficiency (89.4% for E. coli and 89.7% for S. aureus ) even after cultivating in the bacterial suspensions for 3 days. This anti-biofouling solar-driven water evaporator evidently improves the lifetime of the material in natural water, conducive to further commercial applications. 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source Royal Society Of Chemistry Journals 2008-
subjects Aerogels
Biofilms
Biofouling
Chitosan
Converters
E coli
Efficiency
Embedding
Energy conversion
Energy conversion efficiency
Evaporation
Evaporation rate
Evaporators
Nanoparticles
Photovoltaic cells
Plugging
Scaffolds
Solar energy
Solar energy conversion
Solar heating
Steam
Sun
Transportation
Zinc oxide
title Anti-biofouling double-layered unidirectional scaffold for long-term solar-driven water evaporation
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