Water is readily available nearly anywhere as vapor. Thus, atmospheric water harvesting (AWH) technologies are seen as a promising solution to support sustainable water production. This work reports a novel semi-interpenetrating network, which integrates poly(pyrrole) doped with a hygroscopic salt and 2D graphene-based nanosheets optimally assembled within an alginate matrix, capable of harvesting water from the atmosphere with a record intake of up to 7.15 g_w/g_s. Owing to the incorporated graphene nanosheets, natural sunlight was solely used to enable desorption, achieving an increase of the temperature of the developed network of up to 71 °C within 20 min, resulting in a water yield of 3.36 L/kg_S in each cycle with quality well within the World Health Organization standard ranges. Notably, after 30 cycles of sorption and desorption, the composite hydrogel displayed unchanged water uptake and stability. This study demonstrates that atmospheric water vapor as a complementary source of water can be harvested sustainably and effectively at a minimal cost and without external energy input.

中文翻译：

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用于大气集水和太阳能再生释放的高效半互穿网络吸附剂


水几乎在任何地方都可以以蒸气形式轻易获得。因此，大气水收集（AWH）技术被视为支持可持续水生产的有前途的解决方案。这项工作报告了一种新型的半互穿网络，它将掺有吸湿性盐的聚吡咯和在藻酸盐基质中最佳组装的二维石墨烯基纳米片集成在一起，能够从大气中收集水，摄入量高达 7.15 克。 _w /g _s 。由于掺入了石墨烯纳米片，仅利用自然光进行解吸，即可在 20 分钟内将发达网络的温度升高至 71 °C，产水量达到 3.36 L/kg _S