AI Article Synopsis

  • - Solar-driven interfacial evaporation is a promising technique for producing clean water from salty or polluted sources by converting solar energy into steam, but organic pollutants can contaminate the collected water during this process.
  • - A new multifunctional clean water generation system combines photothermal conversion, adsorptive filtration, and photocatalytic purification into one platform, using a unique structure called BiOBr@ZCW made from metal-carbon materials.
  • - This system achieves a high evaporation rate of 1.67 kg/m²h and an 85% efficiency under standard solar conditions, while effectively degrading the rhodamine B pollutant by 98.43% in 20 minutes, addressing the issue of water purification effectively.

Article Abstract

Solar-driven interfacial evaporation has emerged as a promising avenue for clean water production, leveraging solar energy to extract water vapor from salty and polluted water sources. However, a critical challenge remains, during the photothermal evaporation process, organic pollutants and small water-soluble molecules can transfer into distilled steam, degrading the purity of the collected water. Herein, we develop a multifunctional clean water generation system that integrates photothermal conversion, adsorptive filtration and subsequent photocatalytic purification within a unified platform. This system features an inner hierarchical porous metal-carbon layer derived from ZIF-67 carbonization, seamlessly bridging a wood carbon scaffold and BiOBr nanosheets (BiOBr@ZCW) to smoothly facilitate synergistic actions between photothermal evaporation and adsorption-photodegradation processes. This BiOBr@ZCW configuration not only minimizes thermal dissipation, facilitating a high evaporation rate of 1.67 kg m h and an efficiency of 85% under standard solar irradiation but also enhances the photocatalytic degradation of the rhodamine B organic pollutant with a remarkable 98.43% degradation rate within just 20 minutes. This integrated system offers a robust solution to the challenges of water purification by ensuring both high efficiency in solar steam generation and effective pollutant degradation.

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Source
http://dx.doi.org/10.1039/d4mh00798kDOI Listing

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