Figure S1. High-magnification SEM images of (a, b) carbonaceous nanofiber aerogel and (c, d) CNF aerogel at different magnifications.
Figure S2. TEM images of (a, b) carbonaceous nanofiber aerogel and (c, d) CNF aerogel at different magnifications.
Figure S3. (a) Photograph of CNF aerogels of diverse sizes. (b) Photograph of the biggest CNF aerogel fabricated in the current study.
Figure S4. Photograph of a CNF aerogel with a size of 3.1× 1.7 × 1 cm3 on the balance (56.1 mg), demonstrating the material's low density.
Figure S5. Nitrogen adsorption/desorption isotherms of CNF aerogels.
Figure S6. (a) Photograph of the carbonaceous nanofiber aerogel and the CNF aerogel after being placed on water. (b) Water droplets as quasi-spheres and soybean oil trace on the surface of the CNF aerogel.
Figure S7. The sequential photographs of CNF aerogel absorbing phenoxin (dyed with Sudan III) under water.
Table S1. Pore volumes of CNF aerogels calculated from the uptake of various organic liquids.
Weight gain (g g-1)
Density (g cm-3)
Pore volume (cm3 g-1)
As shown in Table S1, pore volumes were calculated based on the sorption capacity for organic liquids and their densities. The values range from 78.18 to 99.24 cm3 g-1, which is consistent with pore volumes of ca. 99 cm3 g-1 calculated from apparent density, but far from that suggested by nitrogen sorption (pore volume of 0.32 cm3 g-1). The main reason for this difference is that nitrogen sorption does not allow for quantitative measurement of micrometer-scale pores (nitrogen sorption measurements are mainly suitable to test pores with a size between 0.35 nm and 400 nm).
Figure S8. Sorption kinetics of four organic liquids: (a) ethanol, (b) phenoxin, (c) soybean oil, and (d) diesel oil.
Table S2. Fitting parameters of sorption kinetics of four organic liquids.