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Issue 21, 2019
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Porous three-dimensional carbon foams with interconnected microchannels for high-efficiency solar-to-vapor conversion and desalination

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Abstract

Solar-driven distillation and desalination are promising technologies for large-scale water purification. Internal micro-channels are critical for the performance of a steam generation device in consideration of thermal management and water transportation. Here, we designed novel porous three-dimensional carbon foams (CFs) with unique interconnected channels and rough surfaces via alkali activation of naturally abundant wood. Promoted by the rough surface, the CFs can harvest more than 97% of the energy of the solar spectrum. The hydrophilic interconnected micro-channels of the CFs enhance water transportation and heat localization. Benefiting from these advantages, the highest steam generation efficiency of the CFs reaches 80.1% under 1 kW m−2. In addition, the CFs also show high stability under harsh conditions and high activity in desalination of seawater. With the unique interconnected micro-channels, this porous carbon device offers a scalable, cost-effective and efficient choice for solar steam generation.

Graphical abstract: Porous three-dimensional carbon foams with interconnected microchannels for high-efficiency solar-to-vapor conversion and desalination

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Supplementary files

Article information


Submitted
02 Jan 2019
Accepted
04 Apr 2019
First published
05 Apr 2019

J. Mater. Chem. A, 2019,7, 13036-13042
Article type
Paper

Porous three-dimensional carbon foams with interconnected microchannels for high-efficiency solar-to-vapor conversion and desalination

P. Qiu, F. Liu, C. Xu, H. Chen, F. Jiang, Y. Li and Z. Guo, J. Mater. Chem. A, 2019, 7, 13036
DOI: 10.1039/C9TA00041K

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