Naila Arshad, Muhammad Sultan Irshad, M. Sohail Asghar, Muneerah Alomar, Junyang Tao, M. A. K. Yousaf Shah, Xianbao Wang, Jinming Guo, S. Wageh, Omar A. Al‐Hartomy, Abul Kalam, Yabin Hao, Zhengbiao Ouyang, Han Zhang

2D MXenes Embedded Perovskite Hydrogels for Efficient and Stable Solar Evaporation

  • Multidisciplinary

AbstractSolar evaporation is a facile and promising technology to efficiently utilize renewable energy for freshwater production and seawater desalination. Here, the fabrication of self‐regenerating hydrogel composed of 2D‐MXenes nanosheets embedded in perovskite La 0.6Sr 0.4Co 0.2Fe 0.8O3−δ (LSCF)/polyvinyl alcohol hydrogels for efficient solar‐driven evaporation and seawater desalination is reported. The mixed dimensional LSCF/Ti3C2 composite features a localized surface plasmonic resonance effect in the polymeric network of polyvinyl alcohol endows excellent evaporation rates (1.98 kg m−2 h−1) under 1 k Wm−2 or one sun solar irradiation ascribed by hydrophilicity and broadband solar absorption (96%). Furthermore, the long‐term performance reveals smooth mass change (13.33 kg m−2) during 8 h under one sun. The composite hydrogel prompts the dilution of concentrated brines and redissolves it back to water (1.2 g NaCl/270 min) without impeding the evaporation rate without any salt‐accumulation. The present research offers a substantial opportunity for solar‐driven evaporation without any salt accumulation in real‐life applications.

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