摘要：Water loss rate is crucial in evaluating the efficiency of atmospheric water harvesting(AWH)***,most moisture-absorbing salts and gels have fixed heat transfer rates,limiting the development of high-performance AWH ***,an anisotropic PEG/CS/MF nanocomposite(APCM)with adjustable thermal transfer efficiency is *** was synthesized using polyethylene glycol(PEG),melamine foam(MF),and chitosan(CS)solution through a freeze orientation *** resulting material exhibits a stable oriented laminated structure formed by hydrogen bonding between PEG,CS,and *** unique structure imparts excellent mechanical ***’s large lamellar gaps and pore diameters enable rapid absorption of atmospheric water molecules at low temperatures without leakage(61.79 kg m^(−3)).The compressible nature of APCM allows for efficient heat transfer at high temperatures,and the release of 80%of absorbed water within 15 *** a proof-of-concept demonstration using a custom-built AWH device,each cubic meter of APCM achieved three AWH cycles within 24 h,producing over 185 kg of ***,this innovative design offers a promising solution for enhancing the efficiency of AWH,potentially addressing water scarcity issues in various regions.

摘要：壳聚糖富含氨基、羟基等活性基团,可与染料形成配合物。此外,壳聚糖具有生物降解性、生物相容性、成本低和资源丰富等特点,是一种绿色无污染的材料。然而,壳聚糖的有机凝胶结构单一,限制了其对染料的吸附性能。为了克服这个挑战,研究使用壳聚糖和醋酸铜制备了具有三维网络结构的金属有机凝胶。通过调节壳聚糖和醋酸铜的配比,可以调控凝胶的结构、比表面积和孔隙,并研究其染料吸附机理。研究结果显示,这种具有三维网络结构的金属有机凝胶对甲基橙染料的去除率达到了49%。干凝胶对甲基橙染料的吸附符合Freundlich等温吸附模型,从动力学角度分析属于拟一级动力学,表明它是可逆的物理吸附过程,染料可进行二次利用。壳聚糖基金属有机凝胶在染料吸附领域具有广阔的应用前景。