Schweng Paul, Li Changxia, Guggenberger Patrick, Kleitz Freddy, Woodward Robert T
Institute of Materials Chemistry and Research, Faculty of Chemistry, University of Vienna, Währinger Straße 42, 1090, Vienna, Austria.
Vienna Doctoral School in Chemistry, University of Vienna, Währinger Straße 42, 1090, Vienna, Austria.
ChemSusChem. 2024 Oct 21;17(20):e202301906. doi: 10.1002/cssc.202301906. Epub 2024 Jun 14.
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 at 10 % RH and even 0.08 g g 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 cycles were performed on the material without significant detriment to its adsorption performance, demonstrating the potential of the sulfonated COF for real-world implementation.
我们报道了一种能够在干旱条件下进行大气集水的磺化共价有机框架（COF）。研究了该框架的等温吸水曲线，该网络在高达45°C的温度下，在低相对湿度（RH）下表现出陡峭的水吸附，在10%RH时吸水率达到0.12 g/g，在仅5%RH时甚至达到0.08 g/g，这代表了地球上一些最极端的条件。我们发现，与未磺化的类似物相比，磺酸盐部分的加入使水等温线曲线中的吸附向更低的RH转移，很好地证明了在炎热干旱地区加入这些亲水性位点对吸水的好处。对该材料进行了反复的吸附和解吸循环，而对其吸附性能没有显著损害，证明了磺化COF在实际应用中的潜力。
