Adsorption performance and kinetic study of hierarchical porous Fe-based MOFs for toluene removal

Ma, Xiao; Wang, Wenlong; Sun, Chenggong; Li, Hui; Sun, Jing; Liu, Xin

doi:10.1016/j.scitotenv.2021.148622

Cited by 69 publications

(19 citation statements)

References 58 publications

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“…The C 1s XPS (Figure 6(c)) spectrum of MIL-100 (Cr) before irradiation could be deconvoluted into four peaks at binding energies of 284.8 eV, 286.2 eV, 288.5 eV, and 290.6 eV, which were attributed to C−C/C−H, C−O, C�O, and O�C�O/π−π, respectively. 43 Apparently, the peaks ascribed to O�C�O/π−π and C−O positively shift to the binding energy of 291.6 and 286.3 eV, implying the decrease of electron density of the carboxyl groups. 44 The O 1s spectrum of MIL-100 (Cr) (Figure 6(d)) could be deconvoluted into three peaks at 531.9 eV, 534.2 eV, and 536.1 eV, which were ascribed to Cr−O−Cr, Cr−O−,C and O�C�O, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

“…The binding energy shifts cannot be observed suggesting that the metal clusters in MIL-100 (Cr) maintain integrity after exposure to a gamma dose of 5 MGy. The C 1s XPS (Figure (c)) spectrum of MIL-100 (Cr) before irradiation could be deconvoluted into four peaks at binding energies of 284.8 eV, 286.2 eV, 288.5 eV, and 290.6 eV, which were attributed to C–C/C–H, C–O, CO, and OCO/π–π, respectively . Apparently, the peaks ascribed to OCO/π–π and C–O positively shift to the binding energy of 291.6 and 286.3 eV, implying the decrease of electron density of the carboxyl groups .…”

Section: Resultsmentioning

confidence: 99%

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Effects of High Gamma Doses on the Structural Stability of Metal–Organic Frameworks

Liu

Wolterbeek

et al. 2022

Langmuir

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Four different MOFs were exposed to γ rays by a cobalt-60 source reaching a maximum dose of 5 MGy. The results showed that the MIL-100 (Cr) and MIL-100 (Fe) did not exhibit obvious structural damage, suggesting their excellent radiation stability. MIL-101 (Cr) showed good radiation stability up to 4 MGy, but its structure started degrading with increasing radiation dose. Furthermore, the results showed that the structure of AlFu MOFs started to decompose at a gamma dose of 1 MGy, exhibiting a much lower tolerance to γ radiation. At this radiation energy, the dominant interaction of the gamma-ray with MOFs is the Compton effect and the radiation stability of MOFs can be improved by prolific aromatic linkers, high linker connectivity, and good crystallinity. The results of this study indicate that MIL-100 and MIL-101 MOFs have a good potential to be employed in nuclear applications, where relatively high radiation doses play a role, for example, nuclear waste treatment and radionuclides production.

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Section: ■ Results and Discussionmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Effects of High Gamma Doses on the Structural Stability of Metal–Organic Frameworks

Liu

Wolterbeek

et al. 2022

Langmuir

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“…This is highly relevant to the current work [18,19]. Ma and coworkers synthesized three iron-based MOFs for adsorption of a typical volatile organic compound, toluene [20]. However, the particle size of MOF material is mostly at the micron level, and it is difficult to separate from the water phase after adsorption.…”

Section: Introductionmentioning

confidence: 88%

Efficient Removal of Azlocillin Sodium from Water by Polystyrene Anion Exchange Resin Supported MIL-53

Qian

et al. 2021

Processes

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Due to the widespread use of antibiotics in medical treatment, animal husbandry and aquaculture, a large number of antibiotics are discharged into the environment as metabolites or in their original state, causing pollution to water bodies, which is a serious issue. In this study, a novel nanocomposite adsorbent MIL-53/D201 was successfully prepared by hydrothermal synthesis. This approach overcomes the disadvantage of easy dissociation of MOF material in the water phase and realizes the efficient removal of antibiotic azlocillin sodium in water. The crystal morphology and basic structure of the composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy scattering spectroscopy (EDS), and specific surface area and porosity analyzer (BET). The results showed that MIL-53 was successfully synthesized in situ in D201. The results of adsorption experiments show that the maximum saturated adsorption capacity of the composite is 122.3 mg/g when the dosage of the composite is 1.0 g/L. Compared with pure MIL-53 material, the composite material exhibits greater stability and efficient adsorption performance for target pollutants at different pH values. The adsorption process accords with the quasi-second-order kinetic adsorption model and Langmuir adsorption isothermal model. After five cycles of adsorption and desorption, the removal rate of MIL-53/D201 to azlocillin sodium was still above 87%.

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“…Elovich model was also applied according to the Eq. ( 5) (Riahi et al 2017): Where α is the initial adsorption rate (g. mg − 1 .min − 1 ), and the parameter β is related to the extent of surface coverage and activation energy for chemisorption (g.mg − 1 ).To explore the diffusion principle of chlorophenols through the adsorbent polymer, based on kinetic data, the intra-particle diffusion model (Ma et al 2021) is carried out to analyze the rate controlling steps (Eq. 6).…”

Section: Kinetics and Rate Controlling Stepmentioning

confidence: 99%

Multifunctional polysaccharide structure as green adsorbent for chlorophenols removal from aqueous solutions: experimental and modeling approaches

Ferrah¹,

Merghache

Chabane³

et al. 2022

Preprint

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A trifunctional polysaccharide structure based on a biodegradable matrix, Chitosan/Alginate-PolyEthylene-Imine-Phenyl-Phosphonamidic Acid (CHIT/ALG-PEIPPAA) was synthesis via a condensation reaction, using glutaraldehyde as cross linking agent. The aim of this research work is to investigate the chlorophenols adsorption in the batch process from an aqueous medium. The influence of several parameters like pH, time reaction, initial concentration, and ionic strength was followed carefully in this study. Scanning electron microscopy (SEM) micrographs show a heterogeneous morphology with different particle sizes of agglomerates around a few micrometers, and irregular particles shape. The FTIR spectrum and Zeta potential characterization confirms the presence of several hydrophilic groups and a high positive charge around 31.4 mV for CHIT/ALG-PEIPPAA surface adsorbent. The optimum pH solution for chlorophenols removal was reached at an initial pH of around 4.4. The maximal adsorption capacity was found to be 118 mg.g− 1, and 249 mg.g− 1 under optimum conditions for 4-chlorophenols and 2–4 chlorophenols respectively. The kinetic modeling followed the pseudo-second-order rate expression for both chlorophenols molecules. Thermodynamics data leads to an exothermic and spontaneous adsorption process (∆H = − 6.98KJ.mol− 1; ∆H = − 2.74KJ.mol− 1), respectively for 4-chlorophenols and 2–4 chlorophenols. The regeneration process of CHIT/ALG-PEIPPAA is more favorable in the presence of hydrochloride acid (2.0 mol.L− 1), up to 78%, and 91% of desorption yield for 4-chlorophenols and 2–4 chlorophenols, respectively.

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Adsorption performance and kinetic study of hierarchical porous Fe-based MOFs for toluene removal

Cited by 69 publications

References 58 publications

Effects of High Gamma Doses on the Structural Stability of Metal–Organic Frameworks

Effects of High Gamma Doses on the Structural Stability of Metal–Organic Frameworks

Efficient Removal of Azlocillin Sodium from Water by Polystyrene Anion Exchange Resin Supported MIL-53

Multifunctional polysaccharide structure as green adsorbent for chlorophenols removal from aqueous solutions: experimental and modeling approaches

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