期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 3, 页码 3762-3770出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c16054
关键词
seawater desalination; membrane; Janus structure; MXene; photothermal
资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [11207717, T21-604/19-R]
This study presents a self-assembled flexible porphyrin Ti3C2Tx MXene Janus membrane for dual-functional enabled photothermal desalination, demonstrating efficient water pumping, heat localization, vapor generation, and salt resistance. The interaction and charge redistribution between MXene and porphyrin lead to a stable hydrophobic/hydrophilic Janus structure with synergistically enhanced photothermal conversion, providing an effective strategy for seawater desalination using MXene membranes.
Photothermal desalination is a promising approach for seawater purification by harvesting solar energy. Titanium carbide (Ti3C2Tx MXene) membranes have been regarded as potential materials for photothermal desalination by virtue of their excellent light-to-heat conversion. However, achieving a well-balanced synergy between high evaporation rate and good salt resistance remains a significant challenge due to their limited solar absorption and inferior stability. Herein, we report a self-assembled flexible porphyrin Ti3C2Tx MXene Janus membrane (Janus PMX membrane) for dual-functional enabled photothermal desalination. The self-assembly of porphyrin on MXene not only effectively creates a favorable hydrophobic surface but also simultaneously enables efficient solar utilization. The significant interactions and charge redistribution between MXene and porphyrin lead to a stable hydrophobic/hydrophilic Janus structure with synergistically enhanced photothermal conversion. As a result, the Janus PMX membrane demonstrates highly efficient water pumping, heat localization, vapor generation, and salt resistance during photothermal desalination. This work presents an effective and facile strategy toward advancing a well-performing MXene membrane for efficient seawater desalination.
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