Abstract
A variety of activated carbons (ACs) with different burnoff degrees (0–60%) and polystyrene cross-linked with divinylbenzene (PSDVB) were studied using small-angle X-ray scattering (SAXS) and nitrogen adsorption methods. The ACs demonstrate increased deviation of the pore shape from the model of slit-shaped pores with increasing burnoff degree and parallel increasing contributions of pores in the 0.3–50 nm range. The pore size distributions (PSDs) calculated using SAXS and density functional theory (DFT) methods have similar shapes but a more detailed picture for broad pores with SAXS PSDs. The PSDs and chord length distributions of ACs and PSDVB adsorbents have certain close features depending on the specific surface area because contributions of narrower pores and thinner pore walls increase with increasing specific surface area practically independent of the material type.
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