Multifunctional Solar Waterways: Plasma‐Enabled Self‐Cleaning Nanoarchitectures for Energy‐Efficient Desalination

By Shenghao Wu, Guoping Xiong, Huachao Yang, Biyao Gong, Yikuan Tian, Chenxuan Xu, Yan Wang, Timothy S. Fisher, Jian-hua Yan, K. Cen and 4 more. Advanced Energy Materials, 2019

154 citations recorded by the source corpus.

Evaporating seawater and separating salt from water is one of the most promising solutions for global water scarcity. State‐of‐the‐art water desalination devices combining solar harvesting and heat localization for evaporation using nanomaterials still suffer from several issues in energy efficiency, long‐term performance, salt fouling, light blocking, and clean water collection in real‐world applications. To address these issues, this work devises plasma‐enabled multifunctional all‐carbon nanoarchitectures with on‐surface waterways formed by nitrogen‐doped hydrophilic graphene nanopetals (N‐fGPs) seamlessly integrated onto the external surface of hydrophobic self‐assembled graphene foam (sGF). The N‐fGPs simultaneously transport water and salt ions, absorb sunlight, serve as evaporation surfaces, then capture the salts, followed by self‐cleaning. The sGF ensures effective thermal insulation and enhanced heat localization, contributing to high solar‐vapor efficiency of 88.6 ± 2.1%. Seamless connection between N‐fGPs and sGF and self‐cleaning of N‐fGP structures by redissolution of the captured salts in the waterways lead to long‐term stability over 240 h of continuous operation in real seawater without performance degradation, and a high daily evaporation yield of 15.76 kg m−2. By eliminating sunlight blocking and guiding condensed vapor, a high clean water collection ratio of 83.5% is achieved. The multiple functionalities make the current nanoarchitectures promising as multipurpose advanced energy materials.

Subfields: Renewable Energy, Sustainability and the Environment, Surfaces, Coatings and Films, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/b4efbaa1b04cc934d18531b2da186146e65a786e

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In Renewable Energy, Sustainability and the Environment

  1. Lei Shi
  2. Xinzhi Wang
  3. Yuying Yan
  4. Yurong He
  5. Yanwei Hu

In Surfaces, Coatings and Films

  1. Lei Shi
  2. Yuying Yan

In Water Science and Technology

  1. Lei Shi
  2. Xinzhi Wang
  3. Yurong He

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