The sponge morphology and carbon monolith microstructure
were characterized by SEM (Hitachi S4800, Japan) and TEM
(EOL JEM-2100, Japan). Thermal degradation behaviors of
samples were conducted by thermo gravimetric analysis
(BOIF WCT-II, China). Fourier transform infrared (FT-IR) spectra
were collected on a Nexus spectrometer (Nicolet, USA)
using KBr disk. N2 sorption isotherms were measured at
77 K with an ASAP 2020 instrument (Micromeritics, USA).
The specific surface area and pore size distribution were calculated
using the Brunauer–Emmett–Teller (BET) and Barrett–
Joyner–Halenda (BJH) methods, respectively. Contact angles of
samples were performed on a DSA-100 contact-angle system
(Kruss, Germany) at ambient temperature. The volumes of
droplets were in the range of 7–9 lL.
N2 sorption isotherms were measured at
77 K with an ASAP 2020 instrument (Micromeritics, USA).
The specific surface area and pore size distribution were calculated
using the Brunauer–Emmett–Teller (BET) and Barrett–
Joyner–Halenda (BJH) methods, respectively. Contact angles of
samples were performed on a DSA-100 contact-angle system
(Kruss, Germany) at ambient temperature. The volumes of
droplets were in the range of 7–9 lL.