Architecting highly hydratable polymer networks to tune the water state for solar water purification
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It is demonstrated that enhancing the hydrability of the h-LAH could change the water state and partially activate the water, hence facilitating water evaporation, and raises the solar vapor generation to a record rate of ~3.6 kg m−2 hour−1 under 1 sun.Abstract:
Water purification by solar distillation is a promising technology to produce fresh water. However, solar vapor generation, is energy intensive, leading to a low water yield under natural sunlight. Therefore, developing new materials that can reduce the energy requirement of water vaporization and speed up solar water purification is highly desirable. Here, we introduce a highly hydratable light-absorbing hydrogel (h-LAH) consisting of polyvinyl alcohol and chitosan as the hydratable skeleton and polypyrrole as the light absorber, which can use less energy ( −2 hour −1 under 1 sun. The h-LAH-based solar still also exhibits long-term durability and antifouling functionality toward complex ionic contaminants.read more
Citations
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Materials for solar-powered water evaporation
TL;DR: In this article, the fundamental principles of materials design for efficient solar-to-thermal energy conversion and vapour generation are summarized for both fundamental research and practical water-purification applications.
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Hydrogels and Hydrogel-Derived Materials for Energy and Water Sustainability.
TL;DR: This review highlights the highly tunable synthesis of various hydrogels, involving key synthetic elements such as monomer/polymer building blocks, cross-linkers, and functional additives, and discusses how hydrogles can be employed as precursors and templates for architecting three-dimensional frameworks of electrochemically active materials.
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Biomass‐Derived Hybrid Hydrogel Evaporators for Cost‐Effective Solar Water Purification
TL;DR: A naturally abundant biomass, konjac glucomannan, together with simple-to-fabricate iron-based metal-organic framework-derived photothermal nanoparticles is introduced into the polyvinyl alcohol networks, building hybrid hydrogel evaporators in a cost-effective fashion.
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Hydrogels as an Emerging Material Platform for Solar Water Purification.
TL;DR: Hydrogels have emerged as a promising materials platform to enable efficient solar water purification under natural sunlight to mitigate water scarcity by improving their performance, scalability, stability, and sustainability.
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Synergistic Energy Nanoconfinement and Water Activation in Hydrogels for Efficient Solar Water Desalination.
TL;DR: The energy confinement at the polymer-nanoparticle interphases and the water activation enabled by polymer-water interaction are investigated to reveal the significance of such effects for high-rate solar vapor generation.
References
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