Adsorption thermodynamics of isoliquiritin on multi-walled carbon nanotubes

Multiwalled carbon nanotubes (MWCNTs) can selectively adsorb structurallysimilar liquiritin and isoliquiritin, both of which are flavonoid compounds. The adsorption thermodynamics of isoliquiritin on MWCNTs was investigated. Results indicate that the quantity of isoliquiritin adsorbed increases with isoliquiritin concentration and decreases with temperature. Adsorption data can be well described by the Freundlich Equation. The values of ΔH₀ and ΔG₀ indicate that the adsorption is a spontaneous exothermic process.