Advanced Fog Harvesting Method by Coupling Plasma and Micro/Nano Materials

Area of Science:

• Materials Science
• Environmental Engineering
• Plasma Physics

Background:

• Water resource shortage is a critical global issue.
• Efficient and economical fog harvesting is essential for alleviating water scarcity.
• Existing fog collection methods face challenges with efficiency and residue.

Purpose of the Study:

• To propose a novel, highly efficient, and economical fog harvesting method.
• To enhance fog collection efficiency using plasma and micro/nano materials.
• To address limitations of conventional fog collectors.

Main Methods:

• Decorating discharge and collecting electrodes of a micro/nano electrostatic fog collector with nanoparticles.
• Utilizing nanoparticles to increase electric field strength and reduce operating voltage for the discharge electrode.
• Designing a novel composite hydrophobic/hydrophilic (HB/HL) structure for the collecting electrode.

Main Results:

• Achieved 93% fog collection efficiency with low power consumption (0.76 W/0.04 m²).
• Nanoparticle decoration increased electric field strength and decreased operating voltage by 28.6% (14 kV to 10 kV).
• The HB/HL structure enabled directional droplet transport, preventing residue and mesh blockage.

Conclusions:

• The proposed plasma-coupled micro/nano material method offers a promising solution for efficient fog harvesting.
• The innovative electrode design and materials overcome limitations of traditional fog collectors.
• This technology provides a new approach for microdroplet collection and fog collector design to combat water crisis.