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BET theory
About: BET theory is a research topic. Over the lifetime, 9046 publications have been published within this topic receiving 286142 citations.
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TL;DR: Analysis of simulation snapshots elucidated the contributions of "pore-filling" and "monolayer-formation" to the nitrogen adsorption loadings in different MOF pores, revealing the origin of inaccuracies in BET-calculated monolayer loadings, which largely explain discrepancies between BET areas and NASAs.
Abstract: Metal–organic frameworks (MOFs) can exhibit exceptionally high surface areas, which are experimentally estimated by applying the BET theory to measured nitrogen isotherms. The Brunauer, Emmett, and Teller (BET)-estimated nitrogen monolayer loading is thus converted to a “BET area,” but the meaning of MOF BET areas remains under debate. Recent emphasis has been placed on the usage of four so-called “BET consistency criteria.” Using these criteria and simulated nitrogen isotherms for perfect crystals, we calculated BET areas for graphene and 25 MOFs having different pore-size distributions. BET areas were compared with their corresponding geometrically calculated, nitrogen-accessible surface areas (NASAs). Analysis of simulation snapshots elucidated the contributions of “pore-filling” and “monolayer-formation” to the nitrogen adsorption loadings in different MOF pores, revealing the origin of inaccuracies in BET-calculated monolayer loadings, which largely explain discrepancies between BET areas and NASAs. ...
184 citations
TL;DR: The experimental data showed that adsorbent C possessed better adsorption properties than the counterparts, and the order of advertisersorption capacity for six metal ions was Mn(2+)
184 citations
TL;DR: In this paper, a facile approach to synthesize nitrogen-doped porous carbon materials via a two-step fabrication process using the stem bark of broussonetia papyrifera (BP) as the biomass precursor is presented.
184 citations
TL;DR: In this paper, the authors used H3PO4 activation (WHAC) to eliminate Pb(II) in water hyacinth and showed that the adsorption behavior follows pseudo-first order kinetic and Langmuir isotherm.
184 citations
TL;DR: A surface modified porous wood carbon monolith (m-WCM) with high consistency and large porosity was successfully synthesized by carbonization of poplar wood and subsequent surface modification with HNO 3 solution.
182 citations