화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.66, No.1, 669-676, 2021
Ultra-High-Capacity Adsorption of Rhodamine B in a Carboxyl-Functionalized Metal-Organic Framework via Surface Adsorption
The adsorption of rhodamine B (RhB) from aqueous solution on a functionalized metal-organic framework UiO-664COOH)(2) was studied systematically in view of the adsorption isotherm, kinetics, thermodynamics, effect of pH and co-existing salts, and regeneration of the material. The adsorption behavior of RhB on UiO-66-(COOH)(2) followed the Langmuir isotherm model and pseudo-second-order model. The thermodynamics study indicates that the adsorption of RhB is mainly controlled by the entropy effect rather than the enthalpy change. The strong electrostatic interaction as well as H-bond interaction contributes to the capture of RhB on the nanoscale UiO-66(COOH)(2) via the surface adsorption manner. UiO-66-(COOH)(2) exhibited an ultra-high adsorption capacity of 2200 mg g(-1) and excellent continuous removal ability. The high adsorption capacity, strong anti-interference ability, and easy regeneration make UiO-66-(COOH)(2) as an ideal adsorbent for RhB removal from aqueous solution.