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A High Performance Impedance-based Platform for Evaporation Rate Detection
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Bioinspired Pyramidal Array Photothermal Structure for Highly Efficient Water Evaporation under Omnidirectional

Long Zeng1, Daxiang Deng1, El Hiak Soad1

  • 1School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, China.

ACS Applied Materials & Interfaces
|January 8, 2025
PubMed
Summary

A novel durian-inspired pyramidal array photothermal structure (PAPS) boosts solar water evaporation efficiency. This advanced material offers superior performance under varying light conditions, aiding sustainable freshwater production.

Keywords:
evaporation performanceomnidirectional illuminationpyramidal array photothermal structureseawater desalinationsolar evaporation

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Environmental Engineering

Background:

  • Solar-driven interfacial evaporation is a sustainable solution for freshwater scarcity.
  • Developing efficient photothermal materials for omnidirectional light remains a challenge.

Purpose of the Study:

  • To design and fabricate a 3D multiscale pyramidal array photothermal structure (PAPS) for enhanced solar water evaporation.
  • To evaluate the evaporation performance of PAPS under various illumination conditions.

Main Methods:

  • Fabrication of a 3D multiscale pyramidal array photothermal structure (PAPS) using a facile milling process in a porous foam matrix.
  • Utilizing hybrid photothermal materials (Cu₂O/C) at the nanoscale.
  • Testing evaporation rates under direct, inclined, and convective conditions.

Main Results:

  • PAPS achieved an evaporation rate of 2.08 kg/m²h under direct sunlight, 24% higher than planar structures.
  • Maintained 1.72 kg/m²h at a 45° light angle, with only a 17% decrease.
  • Demonstrated a high evaporation rate of 6.29 kg/m²h under simulated wind conditions (3 m/s).

Conclusions:

  • The PAPS exhibits superior solar water evaporation efficiency under omnidirectional illumination.
  • This structure offers potential for stable solar desalination in variable environments.
  • The design provides a promising pathway for efficient freshwater generation.