Highly efficient solar steam evaporation via elastic polymer covalent organic frameworks monolith.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39488526.
- Also identified by DOI 10.1038/s41467-024-53902-1 and PMC identifier 11531493.
- Licence recorded as CC BY-NC-ND.
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Abstract
Three-dimensional solar steam evaporators with efficient water purification performance have received increasing attention recently. Herein, elastic polymer covalent organic frameworks (PP-PEG) containing PEG chains with intriguing adaptability to guests are prepared by forming porphyrin rings. PP-PEG foams demonstrate full spectrum absorbance and excellent photothermal conversion properties. Through well-designed thermal management and optimization of the hydrophilicity and PEG chain length, we obtain a highly efficient solar evaporator with an evaporation rate of 4.89 kg m<sup>-2</sup> h<sup>-1</sup> under 1 sun in self-contained mode. The optimized solar evaporation rate is increased to 18.88 kg m<sup>-2</sup> h<sup>-1</sup> under 1 sun with a facile truncated cone reflector, exceeding all known solar steam evaporators. This innovative design holds immense promise for desalination and water purification owing to its simple preparation, high efficiency and durability.