3 years ago

Investigation on the micro-structure and adsorption capacity of cellulosic biomass carbon based montmorillonite composite

Investigation on the micro-structure and adsorption capacity of cellulosic biomass carbon based montmorillonite composite
Biomass derived amorphous carbon has received considerable attention in recent years for its great potential applications. In this work, the cellulosic biomass carbon based montmorillonite composite is synthesized by using carbon-bed pyrolysis method. The micro-structure and properties of samples are characterized by Raman, XRD, FT-IR, SEM, TEM and adsorption analyses. The results demonstrates that the montmorillonite components used to enhance the surface performance (granule-layer structure) also has strengthened the Methylene Blue adsorption capacity of biomass carbon in composite, the adsorption capacity is enhanced as the MT concentration increases, the maximum equilibrium value is obtained for 15 wt% montmorillonite mixed biomass carbon composite (93.5 mg/g), which confirms the effects of clay mineral (montmorillonite) on the biomass carbon in carbon-clay composite system. The isotherm data fits the Freundlich isotherm model (R2 = 0.927) corresponding to the physical adsorption (n = 1.214, favorable adsorption). The kinetic data is well described by the intraparticle diffusion model (R2 = 0.939), indicating the intraparticle diffusion controlled adsorption process.

Publisher URL: www.sciencedirect.com/science

DOI: S1387181117305243

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