Journal
LANGMUIR
Volume 38, Issue 37, Pages 11304-11313Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.2c01480
Keywords
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Funding
- National Natural Science Foundation of China [21874143, U21A2070]
- Henan Center for Outstanding Overseas Scientists [GZS201903]
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This study presents a facile strategy to produce robust and efficient absorbent materials for oil/water separation in large-scale cleanups.
Fabrication of absorbent materials foroil/water separation is an important ecological pursuit for oil spill clean-up and organic pollutants' removal. In this study, nanodiamonds (NDs), a promising member of the carbon family, were functionally modified by the covalent linking of octadecylamine (ODA). Subsequently, the superhydrophobic sponge with hierarchical microstructures was fabricated by embedding ND-ODA into a melamine sponge (MS) skeleton via a simple immersion-drying process. The as-prepared sponge (ND-ODA@ PDMS@MS) showed superhydrophobic properties with a water contact angle of 155 & PLUSMN; 2 & DEG;. For various oils and organic solvents, ND-ODA@PDMS@MS possesses excellent absorption capacity (26.65-55.64 g/g) and oil/water separation efficiency (above 98.6%). Furthermore, the adsorption capacity to crude oil remained relatively stable in highly acidic, alkaline, and salty conditions, ensuring the application in the clean-up of industrial oily sewages and marine oil spills. Besides absorbing oil for a single time, ND-ODA@PDMS@MS also exhibited satisfactory performance in continuous oil/water separation. Therefore, this work provides a facile strategy to produce robust and efficient absorbent materials for oil/water separation in large-scale oil and organic solvent cleanups.
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