Surface area and porosity analysis in nanoporous carbons by atomistic pore domain model
Year: 2024
Type: article
Abstract: We present a new atomistic model for evaluating the surface area and porosity of micro-mesoporous carbons. This method, referred to as the atomistic pore domain model (ADPM), advances the adsorption porosity methodology by calculating textural properties of micro-mesoporous carbons without relying on assumptions about pore geometry. A thorough analysis of porosity across eleven porous carbons demonstrates a robust correlation between the surface area accessible to nitrogen, as computed using ADPM and the Brunauer-Emmett-Teller method with Rouquerol criterium. This correlation is observed across a spectrum of nanoporous carbons, ranging from ultramicroporous activated carbon fibers and nanoporous carbon beads to supermicro-mesoporous activated carbons and activated carbon fibers. ADPM facilitates the extraction of the information regarding the nitrogen surface area accessibility and the intrinsic geometric surface area of micro-mesoporous carbons. The nitrogen-to-helium surface area accessibility ratio of the investigated porous carbons varies from approximately 57% to 94%, indicating varying degrees of pore sieving among studied carbon samples. Except for ACF-25 micro-mesoporous activated carbon fiber, the intrinsic geometric surface areas of the studied micro-mesoporous carbons are smaller than the geometrical surface area of a single graphene sheet (2640 m2/g).
Source: Carbon
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,560
OpenAlex ID: W4401284300