Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 11, Pages 13747-13755Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b01637
Keywords
Porous monolith; Phase separation; Polycarbonate; Multiwalled carbon nanotube; Superhydrophobicity; Oil/water separation
Categories
Funding
- National Natural Science Foundation of China [51603190, 11572290, 11432003]
- National Natural Science Foundation of China-Henan Province Joint Funds [U1604253]
- University of Tennessee
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A superhydrophobic/superoleophilic porous polycarbonate/carboxyl-functionalized multiwalled carbon nanotubes (PC/cMWCNTs) monolith with novel hierarchical micronanostructure was facilely fabricated via a thermally impacted nonsolvent induced phase separation method. A novel porous microstructure endowed PC/cMWCNTs monolith had a high porosity of 90.1%. Based on excellent superhydrophobicity (water contact angle of 159 degrees) and superoleophilicity (oil contact angle of 0 degrees), this porous monolith could selectively adsorb various types of oils/organic solvents from the oil-water mixture. Additionally, the monolith exhibited outstanding oil/water separation performance including fast adsorption speed, high saturation capacity, and superior recycling ability. The equilibrium adsorption time and saturated adsorption capacity of soybean oil were 20 s and 12.62 g g(-1) , respectively. By simple centrifugation or evaporation, the recovered PC/cMWCNTs monolith could be reused for at least 10 cycles. Thus, porous PC/cMWCNTs monolith is a promising candidate for oil-polluted water treatment.
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