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Facile Preparation of Robust Porous Photothermal Membrane with Antibacterial Ability for Efficient Solar-driven Interfacial Water Evaporation

Abstract

Facile preparation of self-floated photothermal membrane with simultaneous mechanical stability and antibacterial ability for solar-driven interfacial water evaporation is regarded as a practical technique for clean water production. Herein, a robust porous bi-layered photothermal membrane (carbon nanotube@polyethylene imine/mixed cellulose esters, CNT@PEI/MCE), where the top solar conversion layer of pristine CNT is seamlessly connected to the bottom heat transfer barrier layer of hydrophilic MCE, is facilely prepared via a simple vacuum filtration. With the synergistic integration of MCE-mediated heating localization, CNT-mediated solar-heating, PEI-mediated hygroscopicity and noncovalent interactions, the CNT@PEI/MCE membrane can stay at the water-air interface with Wenzel’s wetting behavior and thus achieve a high interfacial water evaporation efficiency (72%) and a rapid evaporation rate (4.23 times higher than that of pure water) under a simulated solar irradiation. Meanwhile, the CNT@PEI/MCE membrane exhibits good mechanical stability, strong operability, distinct antibacterial ability and high durability. This advanced membrane, together with its cost-effectivity, provides a practical sustainable energy technique for clean water production.

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Publication details

The article was received on 22 Sep 2018, accepted on 03 Dec 2018 and first published on 04 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA09223K
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Facile Preparation of Robust Porous Photothermal Membrane with Antibacterial Ability for Efficient Solar-driven Interfacial Water Evaporation

    Y. Li, X. Cui, M. Zhao, Y. Xu, L. Chen, Z. Cao, S. Yang and Y. Wang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA09223K

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