Affiliation:
1. Key Lab for Special Functional Materials of Ministry of Education School of Materials Henan University Kaifeng Henan Province 475004 China
2. Key Laboratory of Bio‐inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
3. Binzhou Institute of Technology Weiqiao‐UCAS Science and Technology Park Binzhou Shandong Province 256606 China
Abstract
AbstractHypersaline wastewater management is a crucial issue for water‐energy nexus. Evaporation‐based zero liquid discharge (ZLD) desalination shows great promise to detoxify the hypersaline wastewater. However, salt formed on the evaporation surface compromises the efficiency and continuity of desalination. Here, the study reports a photothermal lubricant‐infused surface (PLIS), capable of inducing mobile salt crystallization and eliminating salt scaling during desalination. Few nuclei initiate away from the PLIS, followed by migration inward as salt growth, leading to compact crystal. The final dewetting process leaves only scattered protrusions from crystal bottom contacting with the PLIS. Such a converged small area plus pinpoint contacting mode produce an ultralow adhesion of salt to the substrate (≈2 mN mg−1), ≈40 times lower than that on a regular‐used hydrophobic surface. The salt crystal precipitated on the PLIS can be blown off easily by air flow, refreshing the evaporating surface for continuous desalination and realizing ZLD.
Funder
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
5 articles.
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