Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)

Abstract

Gas adsorption is an important tool for the characterisation of porous solids and fine powders. Major advances in recent years have made it necessary to update the 1985 IUPAC manual on Reporting Physisorption Data for Gas/Solid Systems. The aims of the present document are to clarify and standardise the presentation, nomenclature and methodology associated with the application of physisorption for surface area assessment and pore size analysis and to draw attention to remaining problems in the interpretation of physisorption data.

The Influence of Acids on Tuning the Pore Size of Mesoporous TiO2 Templated by Non‐Ionic Block Copolymers

“…There is one exception being TiO 2 PA1M with ink bottle type pores (H2 hysteresis, see Figure 2A) with a large bulk pore size and a narrower pore opening. [22] Similar surface areas and pore volumes are observed for all samples except for TiO 2 PA1M that has a slightly lower surface area and half of the pore volume of the other TiO 2 materials (Table 1). This difference fully correlates to the smaller bulk pores (8.4 nm) and pore openings (6.5 nm) of TiO 2 PA1M.…”

Increased Mechanical Stability and Thermal Conductivity of Alumina Reticulated Porous Ceramics (RPC) by Nanoparticle Infiltration Processing

“…In order to avoid collision of terminologies, the use of the IUPAC nomenclature for micro, meso, and macropores is not applied in this work. [4] Commonly, ceramic porosity is accessible by means of pycnometry. [5] The hollow struts are a consequence of the replica process, and their form is a negative facsimile of the polymeric template.…”

Adsorption-induced deformation of nanoporous materials—A review

“…The discussion below concerns adsorption in nanoporous materials, which according to the IUPAC classification have pores with width below 100 nm. 2 When studying adsorption, the discussion is usually focused on the influence of the solid component (adsorbent) on the adsorbed fluid (adsorbate). However, the converse action inevitably takes place-adsorbing fluid can exert colossal pressures (hundreds of atmospheres) on the solid, which leads to the deformation of the latter-adsorptioninduced deformation.…”