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Highly compact nanochannel thin films with exceptional thermal conductivity and water pumping for efficient solar steam generation

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Abstract

Synergetically integrating multiple capabilities into a nanostructured material has become one kind of reliable and sustainable strategy for resolving tricky issues in the energy and environmental fields. Herein, we prepare a series of nanochannel thin films by simply assembling cellulose nanofibers with reduced graphene oxide, dominantly driven by van der Waals interactions. The thicknesses of the as-prepared thin films can be well controlled within several micrometers. Their highly compact nanochannel structures were evidenced 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 excellent hygroscopicities (282 mg g−1) and exceptional in-plane thermal conductivities (614–1238 W m−1 K−1 at 25–80 °C), among the highest values for carbon-based composites. Such thin-film composites are readily used for solar-steam generators, delivering an evaporation rate of 1.47 kg m−2 h−1 under 1 sun illumination, and are also easy to integrate into a high-performance amplified system for desalination on a large scale under natural solar irradiation.

Graphical abstract: Highly compact nanochannel thin films with exceptional thermal conductivity and water pumping for efficient solar steam generation

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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, Advance Article
Article type
Communication

Highly compact nanochannel thin films with exceptional thermal conductivity and water pumping for efficient solar steam generation

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, Advance Article , DOI: 10.1039/D0TA02921A

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