New insights into the selective adsorption mechanism of cationic and anionic dyes using MIL-101(Fe) metal-organic framework: Modeling and interpretation of physicochemical parameters

Shakly, Mohamed; Saad, Laila; Seliem, Moaaz K.; Bonilla‐Petriciolet, Adrián; Shehata, Nabila

doi:10.1016/j.jconhyd.2022.103977

Cited by 29 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highest MO adsorption capacity of CoFe-MOF (104 mg/g) was achieved in an acid medium at pH 4. Therefore, it can be seen that the adsorption With the value of pH pzc < pH, it is possible to determine the surface of the material exhibits a negative charge, which corresponds to the previous study [24]. The doped metals reduce the specific surface area of Fe-MOF, and the changes in the crystal structure and appearance morphology mainly produce the enhancement of adsorption capacity, which is due to competitive coordination between metal ions doped with saturated iron ions to bind carboxylic groups in the BDC and thus an increasing number of active Fe sites are generated.…”

Section: ■ Results and Discussionsupporting

confidence: 62%

Adsorption of Methyl Orange Dyes on Oriented Co/Fe-MOF Bimetallic Organic Framework in Wastewater Treatment

Tran

Phan

et al. 2023

Indones. J. Chem.

View full text Add to dashboard Cite

The production of highly efficient and reusable adsorbents that can be used in pigment treatment has been of great scientific interest. Metallic organic frameworks (MOFs) are considered a new type of material with extremely diverse structures and can be used as adsorbents to remove environmental pollutants. The selected Co/Fe-MOF material was synthesized in this study by using the solvent-thermal method. Then, the effects of several influencing factors such as adsorbent dosage, pH, initial concentration of MO, and exposure time on the adsorption capacity of methyl orange (MO) dyes by Co/Fe-MOF were evaluated. Under acidic conditions (pH 4), the effective removal of MO from aqueous solution reached equilibrium after 60 min upon exposure to MO at the concentration of 200 mg/L, and the adsorption capacity was 137.6 mg/g. The two models of adsorption isotherms, Freundlich and Langmuir, showed good compatibility with the experimental data, and the calculated correlation coefficients (R2) were both greater than 0.96. The MO adsorption efficiency was proposed to fit the pseudo-quadratic and pseudo-first-order kinetic models. Therefore, MOF materials can be considered as a potential agent for wastewater treatment, thereby providing a possible solution to solve water pollution.

show abstract

Section: ■ Results and Discussionsupporting

confidence: 62%

Adsorption of Methyl Orange Dyes on Oriented Co/Fe-MOF Bimetallic Organic Framework in Wastewater Treatment

Tran

Phan

et al. 2023

Indones. J. Chem.

View full text Add to dashboard Cite

show abstract

“…The specific surface area of the material is also affected by the change in the material morphology in the presence of Co 2+ ions; the crystal morphology changes from axial rotation to octahedral with two pointed ends, resulting in a larger specific surface area [27]. The morphology of all Fe-MOF and CoFe-MOF materials exhibit typical octahedral shapes with an average diameter of about 2 µm (Figure 3) [28]. When changing the molar ratio of Co:Fe, uneven structure distribution, crystal size change, or deformation was observed.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Synthesis and Characterization Bimetallic Organic Framework CoxFex(BDC) and Adsorption Cationic and Anionic Dyes

et al. 2022

View full text Add to dashboard Cite

Co-doped Fe-MOF bimetallic organic framework materials at different ratios were synthesized based on the solvothermal method, and we evaluated their morphological characteristics by modern analytical methods such as SEM, XRD, FT-IR, and isotherm of nitrogen adsorption-desorption (BET). The specific surface area of the 0.3 CoFe-MOF sample (280.9 m2/g) is much larger than the Fe-MOF and samples at other ratios. The post-synthesized materials were evaluated for their ability to absorb various dyes, including Methylene Blue (MB), Methyl orange (MO), Congo red (CR), and Rhodamine (RhB), and evaluated for the effects of pH, the initial concentration of the dye solution, time, and dose of adsorbent. The results show that the 0.3 CoFe-MOF material has a high adsorption capacity that is superior to both the original Fe-MOF and the CoFe-MOFs at other ratios. The highest adsorption capacity of MB dye by 0.3 CoFe-MOF reaches up to 562.1 mg/g at pH 10, the initial concentration of MB of 200 mg/L, after 90 min. The charged properties of the dyes and the charged nature of the bimetallic organic frameworks are best demonstrated through the adsorption of dye mixtures. The adsorption efficiency on the mixed system of cationic (MB) and anionic (MO) dyes yielded the highest removal efficiency of 70% and 81%, respectively, after 30 min. Therefore, the research has opened up the potential application of M/Fe-MOF modified materials and CoFe-MOF in organic dyes adsorption in wastewater treatment for environmental protection.

show abstract

“…Metal–organic frameworks (MOFs) have recently emerged as potent candidates for photocatalytic water remediation, thanks to their porous structure, high specific surface area, and modifiable structure and properties. − Among them, iron-based MOFs showed excellent results in Fenton catalysis due to the easy charge exchange in the Fe II /Fe III couple, which, however, needs a partner to support its recycling. In this sense, it has been recently proven that the –NH 2 functionalization of MIL-101(Fe) is a winning strategy to promote the Fe III → Fe II half-reaction kinetics, thus continuously generating hydroxyl radicals …”

Section: Introductionmentioning

confidence: 99%

Empowering Adsorption and Photocatalytic Degradation of Ciprofloxacin on BiOI Composites: A Material-by-Design Investigation

Khasevani,

Nikjoo,

Chaxel

et al. 2023

ACS Omega

View full text Add to dashboard Cite

New insights into the selective adsorption mechanism of cationic and anionic dyes using MIL-101(Fe) metal-organic framework: Modeling and interpretation of physicochemical parameters

Cited by 29 publications

References 40 publications

Adsorption of Methyl Orange Dyes on Oriented Co/Fe-MOF Bimetallic Organic Framework in Wastewater Treatment

Adsorption of Methyl Orange Dyes on Oriented Co/Fe-MOF Bimetallic Organic Framework in Wastewater Treatment

Synthesis and Characterization Bimetallic Organic Framework CoxFex(BDC) and Adsorption Cationic and Anionic Dyes

Empowering Adsorption and Photocatalytic Degradation of Ciprofloxacin on BiOI Composites: A Material-by-Design Investigation

Contact Info

Product

Resources

About