Journal
NANO ENERGY
Volume 90, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106642
Keywords
Water harvesting; Hierarchical porous structure; Loofah sponge; Cost-effective; Bioinspired design
Categories
Funding
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51521004]
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The study developed a promising adsorbent based on natural materials, showing high performance and low cost in atmospheric water harvesting technology. The adsorbent efficiently adsorbs and desorbs water, and has the potential to harvest water resources at a low cost.
As a promising technology for water scarcity alleviation, Atmospheric Water Harvesting (AWH) appeals for adsorbents with high performance, low cost, low environmental impact, and low energy consumption for practical application. Herein, a super hygroscopic complex based on natural Loofah grafted Calcium Alginate sorbent with Ink (ILCA) with comprehensive performance assessment is developed for the first time. It is found that the sorbent can adsorb 0.5-1.2 g g(-1) water at 30%-60% RH, then desorb it rapidly under 1 sun (1.5 kg m(-2) h(-1))). Moreover, around 2.8 g of water can be collected by 4.96 g ILCA in 5 h (23 degrees C, RH50%). This work further conducted a techno-economic analysis of ILCA and found that 1 kg water can be harvested with a material cost of only $0.84 (e.g. cheapest option in literature). Such results harbor the potential for sustainable, eco-friendly, and cheap AWH that can be used in underdeveloped regions with high solar energy potential.
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