期刊
ADVANCED MATERIALS
卷 34, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202110548
关键词
hydrogels; hypercrosslinked polymers; solar vapor generation; volatile organic compound removal; water purification
类别
资金
- UT Energy Institute
- Camille-Dreyfus Teacher-Scholar Award
The SWEG is a novel super water-extracting gel that can efficiently extract water from VOC-containing water through strong hydrogen bonding effect. After solar distillation treatment, it can achieve up to 99.99% removal ratio of VOCs. This solar water purification system can produce clean water, surpassing other electricity-based competitive technologies.
Water-soluble volatile organic compounds (VOCs) are widely spread in the natural hydrological cycle, contaminating potential water sources, and leading to unexpected ecological hazards. However, water-purification technologies toward VOCs are energy-intensive and present unsatisfactory purity of the obtained water. The fundamental challenge is to differentiate the motion of water and VOC molecules by separators. Here, the concept of a super water-extracting gel (SWEG) for VOC-management and water purification via direct solar distillation is proposed. The strong hydrogen bonding effect in the hypercrosslinked hydrophilic polymeric networks enables the SWEG to extract water from VOC-containing water, which rejects the VOC solutes while allowing water through for interfacial evaporation. The obtained SWEG achieves a VOCs removal ratio up to 99.99% by solar distillation under 1 sun. A solar water-purification system is also demonstrated to produce clean water, which surpasses other competitive technologies based on electricity.
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