A hydrophobic-superoleophilic 2D Zr-based alkyne-rich metal-organic framework for oil/water separation and solar-assisted oil evaporation

A 2D layered Zr-based metal-organic framework (MOF), Zr L1 , was assembled from Zr( iv ) ions and backfolded alkyne-rich dicarboxylate linker ( L1 2− ). Structurally robust and chemically stable Zr L1 was dip-coated on polyurethane (PU) to give a composite Zr L1 @PU, which exhibited significantly en...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 41; pp. 22223 - 22231
Main Authors Luo, Qian-Ru, Zhong, Yuan-Hui, Chung, Lai-Hon, Jiang, Zhixin, Lin, Qia-Chun, Xu, Xin-Ke, Ye, Xinhe, Liao, Wei-Ming, He, Jun
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 24.10.2023
Subjects
Alkynes
Evaporation
Hydrophobicity
Immersion coating
Metal-organic frameworks
Oils & fats
Permeability
Polyurethane
Polyurethane resins
Separation
Zirconium
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Summary:A 2D layered Zr-based metal-organic framework (MOF), Zr L1 , was assembled from Zr( iv ) ions and backfolded alkyne-rich dicarboxylate linker ( L1 2− ). Structurally robust and chemically stable Zr L1 was dip-coated on polyurethane (PU) to give a composite Zr L1 @PU, which exhibited significantly enhanced oil/water separation performance (maximum absorption capacity: 66.19 g g −1 , separation efficiency: 99.3%, selectivity: water totally excluded, and permeability: 5340 L m −2 h −1 ) when compared with pristine PU. More importantly, Zr L1 @PU maintained steady performance and framework stability even upon 20 cycles of operation. Given that Zr L1 @PU is photothermally active, it was taken for solar-driven evaporation of the oil harvested during oil/water separation, and the evaporation efficiency of Zr L1 @PU (complete evaporation within 25-40 minutes) outperforms that of pristine PU (30 wt% of the selected oil still remained within the same illumination period). This study represents an illustrative example giving insights into the rational design of hydrophobic/superoleophilic framework for fabricating efficient durable self-cleaning oil/water separator. A hydrophobic/superoleophilic spongy composite based on alkyne-rich 2D Zr-MOF and polyurethane executes solar-assisted self-cleaning oil/water separation.
Bibliography:Electronic supplementary information (ESI) available: General procedure, experimental details, additional PXRD patterns, FT-IR spectra, TG curves, UV-vis DRS spectra, gas sorption plots, photothermal conversion plots, solvent evaporation plots, SEM images and photographs of contact angles (PDF). See DOI
https://doi.org/10.1039/d3ta05241a
ISSN:2050-7488
2050-7496
DOI:10.1039/d3ta05241a