Selectivity Adsorptive Mechanism of Different Nitrophenols on UIO-66 and UIO-66-NH2 in Aqueous Solution
| Autor: | Guangran Lv, Ziyang Guan, Zhan-hang Zhang, Jian-ming Liu, Zhen-hu Xiong |
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| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
Chemistry Hydrogen bond General Chemical Engineering Inorganic chemistry Substrate (chemistry) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Solvent chemistry.chemical_compound Adsorption Phenol 0210 nano-technology Selectivity Benzene |
| Zdroj: | Journal of Chemical & Engineering Data. 61:3868-3876 |
| ISSN: | 1520-5134 0021-9568 |
| Popis: | UIO-66 and UIO-66-NH2 were synthesized by a solvent thermal method, and their textures were characterized. The adsorption selectivity, kinetics, isotherms, and mechanism of the two MOFs in a single solute system for phenol, 4-nitrophenol, 2,4-dinitrophenol, and 2,4,6-trinitrophenol were studied. At pH 4.0, the two MOFs exhibited a greater adsorption capacity for 2,4-dinitrophenol than for other nitrophenols; however, at lower substrate concentrations (C0 < 100 mg/L), the adsorption capacity of UiO-66-NH2 for 2,4-dinitrophenol was greater than that of UiO-66. The study of the adsorption mechanism showed that the electrostatic attraction is the main way in which UIO-66 and UiO-66-NH2 adsorb nitrophenols. Moreover, there was π-electron accumulation at a certain angle between the benzene ring of the adsorbents and the benzene ring of nitrophenols, whereas UiO-66-NH2 could also combine the nitrophenols through the hydrogen bonds originating from the amino groups. The fitting results of adsorption data showed t... |
| Databáze: | OpenAIRE |
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