Fig. 2

(a) XRD pattern; (b) Raman spectrum; (c) FTIR spectrum; and (d) N2 adsorption–desorption isotherm of the charcoal material.

(a) XRD pattern; (b) Raman spectrum; (c) FTIR spectrum; and (d) N2 adsorption–desorption isotherm of the charcoal material.