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This study introduces a green method for creating efficient fog collectors using laser fabrication and heat treatment on brass. The novel superhydrophobic/hydrophilic surfaces significantly enhance water collection, offering a sustainable solution to water scarcity.

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Area of Science:

  • Materials Science and Engineering
  • Surface Chemistry
  • Environmental Engineering

Background:

  • Water scarcity is a global challenge, driving the need for innovative water collection methods.
  • Conventional fog collection devices often rely on complex chemical fabrication processes with environmental drawbacks.
  • Developing efficient and eco-friendly fog harvesting technologies is crucial for sustainable water resource management.

Purpose of the Study:

  • To develop a green and scalable fabrication strategy for superhydrophobic/hydrophilic surfaces for fog collection.
  • To investigate the effect of laser process parameters on brass wettability and fog collection performance.
  • To design and optimize patterned surfaces for maximum water harvesting efficiency.

Main Methods:

  • A novel green fabrication strategy combining laser ablation and heat treatment was employed on brass substrates.
  • Superhydrophobic/hydrophilic hybrid surfaces with controlled wettability patterns (rectangular/triangular arrays) were created.
  • Water collection efficiency was measured and compared to control samples.

Main Results:

  • The laser process parameters precisely controlled the wettability of the brass surface.
  • The optimized hybrid patterned surface achieved a maximum water collection efficiency of 427.36 mg h⁻¹ cm⁻², a 97% improvement over the control.
  • The fabricated surfaces demonstrated flexibility, enabling the creation of foldable fog collectors.

Conclusions:

  • The proposed green fabrication strategy offers an efficient and environmentally friendly approach to producing advanced fog collectors.
  • The developed superwetting surfaces show significant potential for enhancing water harvesting from fog.
  • This method provides a scalable and adaptable solution for addressing water shortages through atmospheric water harvesting.