Abstract
Efficient separations of both water-in-oil (W/O) and oil-in-water (O/W) emulsions are still challenging. In this study, a alginate-based carbon aerogel (AB carbon aerogel) as oil-water separation materials were prepared by wet spinning, high-temperature carbonization, and acidification, which were characterized using scanning electronic microscopy (SEM), energy-dispersion spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and oil and water contact angle. AB carbon aerogel revealed multifunctional separations of immiscible oil-water mixtures and emulsifier-stabilized W/O and O/W emulsions. The separation fluxes and separation efficiencies were 131 L m−2 h−1 and 99.02% for water-in-CCl4 emulsion, and were 94 L m−2 h−1 and 98.97% for n-hexane-in-water emulsion, respectively. The multifunction of AB carbon aerogel is due to the amphiphilicity.
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