![]() ![]() ![]() BET analysis over type I isotherm materials requires a specific treatment in order to accurately assess the BET surface area. Porous materials will typically provide a type I or type IV isotherm, depending on the type of pores being present. Non-porous materials will display a type II isotherm on which the BET surface area can be determined. 77 K, leads to a so-called adsorption isotherm, or BET isotherm, which can be measured over porous and non- porous materials. Adsorption of nitrogen at a temperature of liquid nitrogen, i.e. Most widely known is the determination of the BET surface area by gas adsorption, sometimes referred to as BET analysis. This occurs on the outer surface and, in case of porous materials, also on the internal surface induced by pores. In physical gas adsorption, an inert gas, mostly nitrogen, is adsorbed on the surface of a solid material. ![]()
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