The pyrolysis of Moso bamboo during a carbonization process
caused a porous carbonaceous structure. The carbonaceous structure
became more porous with an increase in temperature, and
the parenchyma cell wall BC became thinner. The formation of crevice
in the parenchyma cell wall is one of the major mechanisms to
promote the formation of the porous structure and increase the
surface area of the charcoal [1]. Dubinin and Plavnik indicated that
porous carbonaceous adsorbents usually contained three varieties
of pores: macro-pores, transitional pores, and micro-pores [21],
and the macro-pores always appear on the surface of the parenchyma
cell [Fig. 3(b)]. In addition, Rodriguez-Reinoso reported that
although most of the adsorption took place in the micro-pores of
activated carbon, meso- and macro-pores served as passages for
the adsorbate to the micro-pores [22].