Adsorption Behavior of Rhodamine B on UiO-66

doi:10.1016/j.cjche.2014.09.009

摘要/Abstract

摘要： The adsorption characteristics of UiO-66 (a Zr-containing metal-organic framework formed by terephthalate) for Rhodamine B (RhB), such as isotherms, kinetics and thermodynamics, were investigated systematically. The batch adsorption data conform well to the Langmuir and Freundlich isotherms. The adsorption kinetics of UiO-66 for RhB can be well described by the pseudo first-order model, and the adsorption thermodynamic parametersΔG₀, ΔH₀ and ΔS₀ at 273 K are-6.282 kJ·mol^-1, 15.096 kJ·mol^-1 and 78.052 J·mol^-1·K^-1, respectively. The thermodynamic analyses show that the adsorption process of RhB on UiO-66 is more favorable at higher temperatures. UiO-66 can be regenerated by desorbing in DMF solution with ultrasonic for 1 h. UiO-66 can keep good performance for at least six cycles of sorption/desorption.

关键词: Adsorption, UiO-66, Kinetics, Thermodynamics, Isotherm, Regeneration

Abstract: The adsorption characteristics of UiO-66 (a Zr-containing metal-organic framework formed by terephthalate) for Rhodamine B (RhB), such as isotherms, kinetics and thermodynamics, were investigated systematically. The batch adsorption data conform well to the Langmuir and Freundlich isotherms. The adsorption kinetics of UiO-66 for RhB can be well described by the pseudo first-order model, and the adsorption thermodynamic parametersΔG₀, ΔH₀ and ΔS₀ at 273 K are-6.282 kJ·mol^-1, 15.096 kJ·mol^-1 and 78.052 J·mol^-1·K^-1, respectively. The thermodynamic analyses show that the adsorption process of RhB on UiO-66 is more favorable at higher temperatures. UiO-66 can be regenerated by desorbing in DMF solution with ultrasonic for 1 h. UiO-66 can keep good performance for at least six cycles of sorption/desorption.

Key words: Adsorption, UiO-66, Kinetics, Thermodynamics, Isotherm, Regeneration

Qinqin He, Qi Chen, Mengmeng Lü, Xueting Liu . Adsorption Behavior of Rhodamine B on UiO-66[J]. , 2014, 22(11/12): 1285-1290.

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