Rapid solar-driven atmospheric water-harvesting with MAF-4-derived nitrogen-doped nanoporous carbon
Sorption-based atmospheric water-harvesting (AWH) could help to solve global freshwater scarcity. The search for adsorbents with high water-uptake capacity at low relative humidity, rapid adsorption-desorption kinetics and high thermal conductivity is a critical challenge in AWH. Herein, we report a...
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Published in | Chemical science (Cambridge) Vol. 15; no. 25; pp. 9557 - 9565 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
Royal Society of Chemistry
26.06.2024
The Royal Society of Chemistry |
Subjects | |
Online Access | Get full text |
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Summary: | Sorption-based atmospheric water-harvesting (AWH) could help to solve global freshwater scarcity. The search for adsorbents with high water-uptake capacity at low relative humidity, rapid adsorption-desorption kinetics and high thermal conductivity is a critical challenge in AWH. Herein, we report a MAF-4 (aka ZIF-8)-derived nanoporous carbon (NPC
MAF-4
-800) with multiple N-doped sites, considerable micropore characteristics and inherent photothermal properties, for efficient water production in a relatively arid climate. NPC
MAF-4
-800 exhibited optimal water-sorption performance of 306 mg g
−1
at 40% relative humidity (RH). An excellent sunlight-absorption rate was realized (97%) attributed to its high degree of graphitization. A proof-of-concept device was designed and investigated for the practical harvesting of water from the atmosphere using natural sunlight. NPC
MAF-4
-800 achieved an unprecedentedly high water production rate of 380 mg g
−1
h
−1
at 40% RH, and could produce 1.77 L kg
−1
freshwater during daylight hours in an outdoor low-humidity climate of ∼25 °C and 40% RH. These findings may shed light on the potential of MOF-derived porous carbons in the AWH field, and inspire the future development of solar-driven water-generation systems.
A MOF-derived nanoporous carbon (NPC
MAF-4
-800) with multiple N-doped sites, considerable porous characteristics and inherent photothermal properties demonstrated a superior water-production rate under a relatively arid climate. |
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Bibliography: | adsorption-desorption isotherm, the elemental analysis, the calculation formula of the water adsorption/desorption kinetic; the optical images and operation steps of solar-driven water desorption experiment in the lab environment; the actual operation of indoor AWH device; the demonstration of outdoor atmosphere water harvesting; the water quality analysis by ICP-OES. See DOI Electronic supplementary information (ESI) available: The SEM image and N 2 https://doi.org/10.1039/d4sc01802h ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 These authors contributed equally to this work. |
ISSN: | 2041-6520 2041-6539 |
DOI: | 10.1039/d4sc01802h |