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Highly Compact Nano-Channelled Thin Films with Exceptional Thermal Conductivity and Water Pumping

Abstract

Synergetically integrating multiple capabilities into a nanostructured material has becoming one kind of reliable and sustainable strategies for resolving the tricky issues in energy and environmental fields. Herein, we prepare a series of nano-channelled thin films by simply assembling of cellulose nanofibers with reduced oxide graphene, dominantly driven through van der Waals interactions. The thicknesses of the as-prepared thin films can be well controlled within several micrometers. Their highly compact nano-channelled structures were manifested by the densities of up to 1.1 g cm-3 and the largest Brunauer-Emmett-Teller specific area of 126 m2 g-1, endowing them with the excellent hygroscopicities (282 mg g-1), and the exceptional in-plane thermal conductivities (614~1238 W m-1 K-1 with respect to 25~80 oC), among the highest values for the carbon-based composites. Such thin-film composites are readily manipulated into solar-steam generators, delivering a record volumetric evaporation rate of 122 kg L-1 h-1 with an efficiency of ~95%, which are also facile to be integrated into an high-performance amplified system for the desalination in large scale under natural solar irradiation.

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Supplementary files

Article information


Submitted
13 Mar 2020
Accepted
25 Jun 2020
First published
25 Jun 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Communication

Highly Compact Nano-Channelled Thin Films with Exceptional Thermal Conductivity and Water Pumping

W. Wei, Q. Guan, C. You, J. Yu, Z. Yuan, P. Qiang, C. Zhou, Y. Ren, Z. You and F. Zhang, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/D0TA02921A

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