期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 837, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.155869
关键词
Hydrophobic modification; NH4H2PO4 ???????; Biomass-derived aerogel; Oil/water separation
资金
- National Natural Science Foundation of China [51978384]
- Shandong Province Postdoctoral Innovative Talents Support Program [SDBX2020002]
- NaturalScience Foundation of Shandong Province, China [ZR2021QE041]
- Major Technological Innovation Engineering Project of Shandong Province [2020CXGC011204]
- Postdoctoral Applied Research Project of Qingdao
A hydrophobic and oleophilic carbon aerogel was successfully prepared from Enteromorpha, which demonstrated exceptional performance in oil spill adsorption and water-in-oil emulsion separation. This method provides a facile, economical, and eco-friendly route to obtain a desirable hydrophobic/oleophilic surface.
Hydrophobic and oleophilic biomass-based block materials are considered to be highly promising candidates used for oil/water separation. However, the crucial hydrophobic modification process often involves various toxic and hazardous organic substances or requires high energy inputs. Inspired by the flame retardant principle of phosphorus containing flame retardants, herein, an Enteromorpha-derived carbon (ADP-EP) aerogel with a water contact angle of 144.2 was prepared by successive freeze-shaping, freeze-drying and low-temperature carbonization treatment (300 ?), using NH4H2PO4 (ADP) as a modifier. The results demonstrated that the introduction of NH4H2PO4 could largely facilitate the removal of oxygenated groups from the pristine EP aerogels and enhance their surface roughness, thereby achieving surface hydrophobic modification. Featuring intrinsic low density, rich porosity and strong lipophilicity, the as-fabricated ADP-EP aerogels exhibited exceptional performance in both oil spill adsorption (~140 g/g) and water-in-oil emulsion separation. Moreover, the good reusability for oil uptake was also realized thanks to its robust mechanical compressibility and thermal stability. This work provides a facile, economical and eco-friendly route to obtain a desirable hydrophobic/oleophilic surface.
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