Recent Advances in the Use of Metal-Organic Frameworks for Dye Adsorption

Au, Vonika Ka‐Man

doi:10.3389/fchem.2020.00708

Cited by 92 publications

(26 citation statements)

References 58 publications

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“…However, the ideal adsorbents not only have high adsorption capacity, but also high adsorption selectivity of the persistent organic pollutants [34,35]. In this context, MOFs are promising alternative adsorbents due to their extraordinary high surface area (up to 7000 m 2 /g [25]), high adsorption capacity, ability to bind various organic pollutant, and adsorption selectivity [7,55,56]. Haque et al shown that MIL-101(Cr) has higher methyl orange (MO) adsorption capacity (114.0 mg/g) than AC (11.2 mg/g), due to surface area of MIL-101(Cr) (3873 m 2 /g) is significantly higher than AC (1068 m 2 /g) [57].…”

Section: Metal-organic Framework As Adsorbentsmentioning

confidence: 99%

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

et al. 2021

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The accumulation of pollutants in water is dangerous for the environment and human lives. Some of them are considered as persistent organic pollutants (POPs) that cannot be eliminated from wastewater effluent. Thus, many researchers have devoted their efforts to improving the existing technology or providing an alternative strategy to solve this environmental problem. One of the attractive materials for this purpose are metal-organic frameworks (MOFs) due to their superior high surface area, high porosity, and the tunable features of their structures and function. This review provides an up-to-date and comprehensive description of MOFs and their crucial role as adsorbent, catalyst, and membrane in wastewater treatment. This study also highlighted several strategies to improve their capability to remove pollutants from water effluent.

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Section: Metal-organic Framework As Adsorbentsmentioning

confidence: 99%

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

et al. 2021

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“…MOFs present excellent performance in removing various contaminants from the gaseous and aqueous medium [38]. The most important advantages of MOF over other adsorbents are structural diversity [39], the possibility of determining the size of the pores, as well as determining the properties and performance by selecting various metal nodes and organic ligands in the synthesis stage. Various methods such as solvothermal [40], hydrothermal [41], mechanochemical [42], sonochemical [43], spray drying [44], sol-gel [45], and flow chemistry [46] have been used in MOFs synthesis.…”

Section: Metal-organic Frameworkmentioning

confidence: 99%

Recent Advances in MOF-Based Adsorbents for Dye Removal from the Aquatic Environment

et al. 2022

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The adsorptive removal of dyes from industrial wastewater using commercially available adsorbents is not significantly efficient. Metal–organic frameworks (MOFs) offer outstanding properties which can boost the separation performance over current commercial adsorbents and hence, these materials represent a milestone in improving treatment methods for dye removal from water. Accordingly, in this paper, the recent studies in the modification of MOF structures in dye removal from the aquatic environment have been discussed. This study aims to elaborate on the synthetic strategies applied to improve the adsorption efficiency and to discuss the major adsorption mechanisms as well as the most influential parameters in the adsorptive removal of dyes using MOFs. More particularly, the advanced separation performance of MOF-based adsorbents will be comprehensively explained. The introduction of various functional groups and nanomaterials, such as amine functional groups, magnetic nanoparticles, and carbon-based materials such as graphene oxide and CNT, onto the MOFs can alter the removal efficiency of MOF-based adsorbents through enhancing the water stability, dispersion in water, interactions between the MOF structure and the contaminant, and the adsorption capacity. Finally, we summarize the challenges experienced by MOF-based materials for dye removal from water and propose future research outlooks to be considered.

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“…Interestingly, Fe-HAF-2 sequestered 99% of the cationic dyes (LV + and MB + ) from solution within 10 min, far more rapidly than Fe-HAF-1 and most other reported anionic frameworks. [51][52] To further explore the adsorption kinetics in Fe-HAF-2, the pseudo-second-order model 53 was used to fit the adsorption of MB + over time with different initial concentrations (Figure S15). The linear form of the equation is:…”

Section: Stability Of M-haf-2mentioning

confidence: 99%

Metal-Hydrogen-Pi-Bonded Organic Frameworks

Samperisi

Zou

Huang

et al. 2021

Preprint

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We report the synthesis and characterization of a new series of permanently porous, three-dimensional metal-organic frameworks (MOFs), M-HAF-2 (M= Fe, Ga or In), constructed from tetratopic, hydroxamate-based, chelating linkers. The structure of M-HAF-2 was determined by three-dimensional electron diffraction (3DED), revealing a unique interpenetrated hcb-a net topology. This unusual topology is enabled by the presence of free hydroxamate groups, which lead to the formation of a diverse network of cooperative interactions comprising single metal-hydroxamate nodes, staggered π–π interactions between linkers and H-bonding interactions between metal-coordinated and free hydroxamate groups. Such extensive, multimodal interconnectivity is reminiscent of the complex noncovalent interaction networks of proteins and endows M-HAF-2 frameworks with good thermal and exceptionally high chemical stability and allows them to readily undergo post-synthetic metal exchange (PSE). We demonstrate that M-HAF-2 can serve as versatile porous materials for ionic separations, likely aided by one-dimensional channels lined by continuously π-stacked aromatic groups and H-bonding hydroxamate functionalities. As a new addition to the small group of hydroxamate-based MOFs, M-HAF-2 represents a structural merger between MOFs and hydrogen-bonded organic frameworks (HOFs).

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Recent Advances in the Use of Metal-Organic Frameworks for Dye Adsorption

Cited by 92 publications

References 58 publications

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

Recent Advances in MOF-Based Adsorbents for Dye Removal from the Aquatic Environment

Metal-Hydrogen-Pi-Bonded Organic Frameworks

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