Synthesis,structure and adsorption properties of bagasse-based carbon molecular sieves

Bagasse-based carbon molecular sieves(BCMS) were synthesized by a two-stage carbonization method,using bagasse as the raw material,and phenol-formaldehyde resin and carboxymethyl cellulose as the binders.The BCMS were characterized by N2 adsorption,X-ray powder diffraction differential thermal analysis,scanning and transmission electron microscopy and adsorptive de-coloring tests.Results showed that the BCMS had mainly micropores with the size centered at 0.72 nm,a micropore volume of 0.11 cm3/g and a Brunauer-Emmett-Teller surface area of 269 m2/g.XRD showed that apart from the broad peaks at 2θ values of 23o and 44o,ascribed to amorphous carbon,there are peaks ascribed to a monoclinic single crystal belonging to C2/c(15) space group,with size of 57.7 nm and cell parameters of a=2.0437 nm,b=0.3497 nm,c=1.034 5 nm,α=90.000°,β=106.439°,γ=90.000°.The BCMS had developed pores with a hierarchical structure,which afforded them a high adsorption capacity of 1.296 g/g for coloring substances in a clear sugarcane liquor.