2. Material and methods
2.1. Materials
Coconut activated carbon (SBET 797 m2/g, Vtot 0.389 cm3/g) was
used as the starting material, which was produced by MU LIN SEN
Activated Carbon Co., Ltd. Before the modification processes, activated
carbon was washed with deionized water, dried at 110 C
for 5 h and marked as AC.
2.2. Sample preparation
2.2.1. Regulation of pore structure
AC was heated in a nitrogen atmosphere to an activated temperature
of 850 C at a heating rate of 10 C/min. After reaching
the activation temperature, nitrogen gas was stopped and water
vapor was used (1.20 g/min) to activate AC for 60 min. The prepared
sample was marked as AC1.