A Robust and Low‐Cost Sulfonated Hypercrosslinked Polymer for Atmospheric Water Harvesting

Schweng, Paul; Mayer, Florian; Galehdari, Danial; Weiland, Kathrin; Woodward, Robert T.

doi:10.1002/smll.202304562

Cited by 18 publications

(3 citation statements)

References 49 publications

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“…Recently, we reported a sulfonated hypercrosslinked polymer (SHCP-10) able to adsorb significant amounts of water from air even at <10% RH. 25 We demonstrated that highly hygroscopic sulfonate groups are excellent candidates for enhancing the water sorption performance of hydrophobic carbonaceous materials, as our non-sulfonated reference exhibited negligible water uptake <70% RH. Here, we adapted this concept in a COF to exploit its crystalline nature and narrow pore size distribution.…”

Section: Introductionmentioning

confidence: 67%

A sulfonated covalent organic framework for atmospheric water harvesting

Schweng,

Li,

Guggenberger

et al. 2023

Preprint

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We report a sulfonated covalent organic framework (COF) capable of atmospheric water harvesting in arid conditions. The isothermal water uptake profile of the framework was studied, and the network displayed steep water sorption at low relative humidity (RH) in temperatures of up to 45 °C, reaching a water uptake of 0.12 g·g−1 at 10% RH and even 0.08 g·g−1 at just 5% RH, representing some of the most extreme conditions on the planet. We found that the inclusion of sulfonate moieties shifted uptake in the water isotherm profiles to lower RH compared to non-sulfonated equivalents, demonstrating well the benefits of including these hydrophilic sites for water uptake in hot arid locations. Repeated uptake and desorption were performed on the network without significant detriment to its adsorption performance, demonstrating the potential of the sulfonated COF for real-world implementation.

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Section: Introductionmentioning

confidence: 67%

A sulfonated covalent organic framework for atmospheric water harvesting

Schweng,

Li,

Guggenberger

et al. 2023

Preprint

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“…Physisorption analysis: The specific surface area, absorbed volume, and pore-size distribution (PSD) of carbon materials were determined from N 2 adsorption-desorption isotherms at 77.4 K using a surface characterization analyzer (SSA-6000, Beijing Builder, Beijing, China). The specific surface area (S BET ) was calculated using the Brunauer-Emmett-Teller (BET) method in a range of relative pressure (P/P 0 ) from 0.05 to 0.20 [27]. The Barrett-Joyner-Halenda (BJH) method was used to determine the pore size distribution (PSD) curves based on the adsorption isotherms but not the desorption isotherms [28].…”

Section: Structural and Physicochemical Characterizations Of Nanoporo...mentioning

confidence: 99%

Nanoporous Carbon Materials Derived from Zanthoxylum Bungeanum Peel and Seed for Electrochemical Supercapacitors

Jia,

Wang,

Wang

et al. 2024

Nanomaterials

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In order to prepare biomass-derived carbon materials with high specific capacitance at a low activation temperature (≤700 °C), nanoporous carbon materials were prepared from zanthoxylum bungeanum peels and seeds via the pyrolysis and KOH-activation processes. The results show that the optimal activation temperatures are 700 °C and 600 °C for peels and seeds. Benefiting from the hierarchical pore structure (micropores, mesopores, and macropores), the abundant heteroatoms (N, S, and O) containing functional groups, and plentiful electrochemical active sites, the PAC-700 and SAC-600 derive the large capacities of ~211.0 and ~219.7 F g−1 at 1.0 A g−1 in 6 M KOH within the three-electrode configuration. Furthermore, the symmetrical supercapacitors display a high energy density of 22.9 and 22.4 Wh kg−1 at 7500 W kg−1 assembled with PAC-700 and SAC-600, along with exceptional capacitance retention of 99.1% and 93.4% over 10,000 cycles at 1.0 A g−1. More significantly, the contribution here will stimulate the extensive development of low-temperature activation processes and nanoporous carbon materials for electrochemical energy storage and beyond.

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“…To address these issues, a commonly employed approach involves embedding salt into porous materials, where the matrix functions as a container to load deliquescent salts [16][17][18][19]. Nevertheless, widely used porous composites like silica gel [16], zeolites [20,21], carbon nanospheres [22], metal-organic frameworks (MOFs) [23,24], POPs [25,26], and COFs [27][28][29] often exhibit unsatisfactory performances due to their limited pore volume [30].…”

Section: Introductionmentioning

confidence: 99%

A Polyzwitterionic@MOF Hydrogel with Exceptionally High Water Vapor Uptake for Efficient Atmospheric Water Harvesting

Yan,

Li,

et al. 2024

Molecules

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Atmospheric water harvesting (AWH) is considered a promising strategy for sustainable freshwater production in landlocked and arid regions. Hygroscopic salt-based composite sorbents have attracted widespread attention for their water harvesting performance, but suffer from aggregation and leakage issues due to the salting-out effect. In this study, we synthesized a PML hydrogel composite by incorporating zwitterionic hydrogel (PDMAPS) and MIL-101(Cr) as a host for LiCl. The PML hydrogel was characterized using various techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and thermogravimetric analysis (TGA). The swelling properties and water vapor adsorption-desorption properties of the PML hydrogel were also assessed. The results demonstrate that the MIL-101(Cr) was uniformly embedded into PDMAP hydrogel, and the PML hydrogel exhibits a swelling ratio of 2.29 due to the salting-in behavior. The PML hydrogel exhibited exceptional water vapor sorption capacity of 0.614 g/g at 298 K, RH = 40% and 1.827 g/g at 298 K, RH = 90%. It reached 80% of its saturated adsorption capacity within 117 and 149 min at 298 K, RH = 30% and 90%, respectively. Additionally, the PML hydrogel showed excellent reversibility in terms of water vapor adsorption after ten consecutive cycles of adsorption-desorption. The remarkable adsorption capacity, favorable adsorption-desorption rate, and regeneration stability make the PML hydrogel a potential candidate for AWH. This polymer-MOF synergistic strategy for immobilization of LiCl in this work offers new insights into designing advanced materials for AWH.

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A Robust and Low‐Cost Sulfonated Hypercrosslinked Polymer for Atmospheric Water Harvesting

Cited by 18 publications

References 49 publications

A sulfonated covalent organic framework for atmospheric water harvesting

A sulfonated covalent organic framework for atmospheric water harvesting

Nanoporous Carbon Materials Derived from Zanthoxylum Bungeanum Peel and Seed for Electrochemical Supercapacitors

A Polyzwitterionic@MOF Hydrogel with Exceptionally High Water Vapor Uptake for Efficient Atmospheric Water Harvesting

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