Zwitterionic functionalized catalytic evaporator enables simultaneous solar distillation and organic pollutant degradation

Chiyu Wen, Jing Yang, Hongshuang Guo, Qingsi Li, Xiangyu Zhang, Xiaodong Wang, Moyuan Cao and Lei Zhang

Applied Energy, 2022, vol. 321, issue C, No S0306261922007152

Abstract: Solar distillation is regarded as a nearly ideal sustainable technology for clean water generation. However, micro- and macro-foulers live in the natural water and volatile organic compounds induced by overdischarging of wastewater are still the main challenges of solar distillation. Herein, a compositive strategy is presented to fabricate self-floatable catalytic evaporators with both solar distillation and organic pollutant degradation, through Fe MOF-loaded electrospinning and antibiofouling zwitterionic coating. The obtained catalytic evaporator with a fibrous structure can lead to enhanced solar distillation rate (1.43 kg m-2h−1) and conversion efficiency (89.41%). More importantly, the zwitterionic hydrogel coating endows the evaporator with superhydrophilicity for continuous water pumping and fascinating multi-contamination repellence against bacteria, alga, oil and salt, and the Fe MOF enables organic pollutants decomposition via photo-Fenton reaction. The currently designed catalytic evaporator integrates the above merits and is expected to provide a new dimension for the designing of multifunctional solar evaporation devices, solving the device contamination and organic residue issues in water treatment.

Keywords: Solar distillation; Photo-Fenton reaction; Volatile organic compounds (VOC); Zwitterion; Desalination; Wastewater treatment (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1016/j.apenergy.2022.119372

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