Hybrid
Hydrogel with High Water Vapor Harvesting Capacity
for Deployable Solar-Driven Atmospheric Water Generator
Version 2 2018-10-20, 13:18
Version 1 2018-09-19, 19:52
Posted on 2018-10-20 - 13:18
The Earth’s atmosphere holds
approximately 12 900
billion tons of fresh water distributed all over the world with fast
replenishment. Atmospheric water harvesting is emerging as a promising
strategy for clean water production in arid regions, land-locked areas,
and remote communities. The water vapor sorbent is the key component
for atmospheric water harvesting devices based on absorbing-releasing
process. In this work, a flexible hybrid photothermal water sorbent
composed of deliquescent salt and hydrogel was rationally fabricated.
It possesses superior water sorption capacity even in low humidity
air thanks to the deliquescent salt and maintains a solid form after
it sorbs a large amount of water owing to the hydrogel platform. The
harvested water could be easily released under regular sunlight via
the photothermal effect, and it can be directly reused without noticeable
capacity fading. An “easy-to-assemble-at-household”
prototype device with 35 g of the dry hydrogel was tested outdoors
under field conditions and delivered 20 g of fresh water within 2.5
h under natural sunlight. It is estimated that the material cost of
making such a device to supply minimum daily water consumption for
an adult (i.e., 3 kg) is only $3.20 (USD). This type of atmospheric
water generator (AWG) is cheap and affordable, works perfectly with
a broad range of humidity, does not need any electricity, and thus
is especially suitable for clean water production in remote areas.
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Li, Renyuan; Shi, Yusuf; Alsaedi, Mossab; Wu, Mengchun; Shi, Le; Wang, Peng (2018). Hybrid
Hydrogel with High Water Vapor Harvesting Capacity
for Deployable Solar-Driven Atmospheric Water Generator. ACS Publications. Collection. https://doi.org/10.1021/acs.est.8b02852
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AUTHORS (6)
RL
Renyuan Li
YS
Yusuf Shi
MA
Mossab Alsaedi
MW
Mengchun Wu
LS
Le Shi
PW
Peng Wang