Nano-Confined Solar-Thermal Water Purification Boosted by Physical Field Disturbance Coupled with Ultrafast...

Area of Science:

• Materials Science
• Environmental Science
• Chemical Engineering

Background:

• Solar interfacial evaporation is crucial for water purification but faces performance plateaus due to material limitations.
• Existing solar-thermal materials struggle to significantly enhance evaporation efficiency and pollutant degradation simultaneously.

Purpose of the Study:

• To develop a synergistic strategy combining nano-confinement and physical-field modulation for accelerated solar-driven evaporation and on-site organic pollutant remediation.
• To break the performance bottleneck in solar-thermal purification technologies.

Main Methods:

• Fabrication of hollow mesoporous carbon nanocages integrated with Fe-N₄ catalytic sites and plasmonic Au nanoparticles.
• Utilizing mesoporous confinement and localized thermal/pressure perturbations to alter water states.
• Implementing non-radical peroxymonosulfate activation for bisphenol A degradation.

Main Results:

• Achieved high solar evaporation rates of 2.56 kg m^-2 h^-1 (planar) and 6.84 kg m^-2 h^-1 (3D) under one-sun irradiation.
• Demonstrated ultrafast degradation of bisphenol A with a rate of 182.5 L g^-1 min^-1.
• The system exhibited an enhanced evaporation coefficient derived from kinetic Hertz-Knudsen-Schrage theory.

Conclusions:

• The proposed strategy effectively couples water-state regulation with catalytic pollutant degradation.
• This integrated framework offers a promising solution for efficient solar-driven water purification and contaminant removal.
• The study establishes a novel approach to overcome performance limitations in solar-thermal purification.