Polymer-assisted modification of metal-organic framework MIL-96 (Al): influence of HPAM concentration on particle size, crystal morphology and removal of harmful environmental pollutant PFOA

Azmi, Luqman Hakim Mohd; Ladewig, Bradley P.

doi:10.1016/j.chemosphere.2020.128072

Cited by 39 publications

(15 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, it has been reported that the enhanced growth of the (100) plane of MIL-96 resulted in narrowed edges and a lengthened crystal morphology (Figure S1a). 66 The MIL-96 framework contains three different types of cages, with void volumes ranging from 100 to 635 Å 3 . Density functional theory (DFT)-calculated pore size distributions (Figure 1f) of MIL-96 show that the framework is primarily microporous with average pore diameters falling below 1 nm.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Energetic Systematics of Metal–Organic Frameworks: A Case Study of Al(III)-Trimesate MOF Isomers

Goncharov

Strzelecki

et al. 2022

Inorg. Chem.

View full text Add to dashboard Cite

Thermal stability and thermodynamic properties of aluminum(III)-1,3,5-benzenetricarboxylate (Al-BTC) metal−organic frameworks (MOFs), including MIL-96, MIL-100, and MIL-110, have been investigated through a suite of calorimetric and X-ray techniques. In situ high-temperature X-ray diffraction (HT-XRD) and thermogravimetric analysis coupled with differential scanning calorimetry (TGA-DSC) revealed that these MOFs undergo thermal amorphization prior to ligand combustion. Thermal stabilities of Al-BTC MOFs follow the increasing order MIL-110 < MIL-96 < MIL-100, based on estimated amorphization temperatures. Their thermodynamic stabilities were directly measured by high-temperature drop combustion calorimetry. Normalized (per mole of Al) enthalpies of formation (ΔH* f ) of MIL-96, MIL-100, and MIL-110 from Al 2 O 3, H 3 BTC, and H 2 O (only Al 2 O 3 and H 3 BTC for MIL-100) were determined to be −56.9 ± 13.7, −36.2 ± 17.9, and 62.8 ± 11.6 kJ/mol•Al, respectively. Our results demonstrate that MIL-96 and MIL-100 are thermodynamically favorable, while MIL-110 is metastable, in agreement with thermal and hydrothermal stability trends. The enthalpic preferences of MIL-96 and MIL-100 may be attributed to their shared trinuclear μ 3 -oxo-bridged (Al 3 (μ 3 -O)) secondary building units (SBUs) promoting stabilization of Al polyhedra by the ligands within these frameworks, in comparison to the sterically strained Al 8 octamer cluster cores formed in MIL-110. Furthermore, similar ΔH* f of MIL-96 and MIL-100 explain their concurrent formation as physical mixtures often encountered during synthesis, implying the importance of kinetic factors that may facilitate the formation of Al-BTC framework isomers. More importantly, the normalized formation enthalpies of Al-BTC MOF isomers follow a negative correlation with the ratio of charged coordinated substituents to linkers (normalized per mole of Al within the MOF formula unit), with enthalpic preference given to systems with smaller (O 2− + OH − )/ligand ratios. This trend has been successfully extended to the previously measured ΔH* f of several Zn 4 O-based frameworks (e.g., MOF-5, MOF-5(DEF), MOF-177, UMCM-1), all of which have been found to be metastable with respect to their dense phases (ZnO, H 2 O, and ligands). The result suggests that carboxylate MOFs with higher metal coordination environments attain more enthalpic stabilization from the coordinated ligands. Thus, the formation of some lanthanide/actinide, transition metal, and main group carboxylate frameworks may be energetically more favored, which, however, requires further studies.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Energetic Systematics of Metal–Organic Frameworks: A Case Study of Al(III)-Trimesate MOF Isomers

Goncharov

Strzelecki

et al. 2022

Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…[10] For example, we synthesize and employ the truncated hexagonal bipyramidal particles, each having a top and a bottom hexagonal facet, the (0002) planes, and twelve trapezoidal side facets, the (21 ̄1̄3 ) planes (Figure 1b). [11] Although the particles are homogeneous in composition, their facets are crystallographically unidentical, which is the basis for anisotropic surface modifications (as we discuss later).…”

Section: Resultsmentioning

confidence: 99%

“…The MIL‐96 crystallites can be prepared as uniform, micrometer‐sized particles by solvothermal synthesis, adopting various shapes characteristic of the hexagonal crystal family (Figure S1, Supporting Information) [10] . For example, we synthesize and employ the truncated hexagonal bipyramidal particles, each having a top and a bottom hexagonal facet, the (0002) planes, and twelve trapezoidal side facets, the (2

\overset{1}{true}

\overset{1}{true}

3) planes (Figure 1b) [11] . Although the particles are homogeneous in composition, their facets are crystallographically unidentical, which is the basis for anisotropic surface modifications (as we discuss later).…”

Section: Resultsmentioning

confidence: 99%

Low‐Symmetry MOF‐Based Patchy Colloids and Their Precise Linking via Site‐Selective Liquid Bridging to Form Supra‐Colloidal and Supra‐Framework Architectures

Lyu

Wang

2021

Angew Chem Int Ed

View full text Add to dashboard Cite

Colloids with surface patches (or patchy particles) can bind and assemble with directionality. However, the bonding between the usually high-symmetry, dome-shaped patches is not precise, as it cannot lock the exact position and orientation of the relevant particles. This issue prevents the assembly of well-defined colloidal superstructures by design. Herein, we introduce low-symmetry, metal-organic framework (MOF)-based patchy colloids, which feature a polyhedral matrix and flat hexagonal patches, along with anisotropic surfaces and compositions. Guided by the encoded shape/ chemical information and mediated by a site-selective liquidbridging interaction, the distinct patchy particles self-assemble into supra-colloidal (or supra-framework) structures with unprecedented precision. In this case, the valence, position, and orientation of the particles within assemblies are fully coordinated and precisely aligned. The dynamic nature of the liquid bridges also allows us to investigate the unique assembly kinetics. Our strategy not only defines new modes of colloidal bonding, but also provides a powerful means toward creating hierarchical and multi-component MOF materials.

show abstract

“…This adsorption capacity is comparable to that of MOFs with a surface area exceeding 1000 m 2 /g for PFASs. 80 Usually, the pore size of MOFs should be within or surpass the molecular dynamics diameter range of PFASs to facilitate efficient diffusion into the pores. 80 For instance, the diameter of the PFOS molecule is 0.65 nm, while the pore size of UiO-66 ranges from 0.37 to 0.92 nm (Figure 4).…”

Section: Performance Of Mofs For Pfassmentioning

confidence: 99%

Metal–Organic Framework-Based Composites for the Adsorption Removal of Per- and Polyfluoroalkyl Substances from Water

Li,

Ma,

Cheng

et al. 2024

Langmuir

View full text Add to dashboard Cite

The increasing health risks posed by per-and polyfluoroalkyl substances (PFASs) in the environment highlight the importance of implementing effective removal techniques. Conventional wastewater treatment processes are inadequate for removing persistent organic pollutants. Recent studies have increasingly demonstrated that metal−organic frameworks (MOFs) are capable of removing PFASs from water through adsorption techniques. However, there is still constructive discussion on the potential of MOFs in adsorbing and removing PFASs for large-scale engineering applications. This review systematically investigates the use of MOFs as adsorbents for the removal of PFAS in water treatment. This primarily involved a comprehensive analysis of existing literature to understand the adsorption mechanisms of MOFs and to identify factors that enhance their efficiency in removing PFASs. We also explore the critical aspects of regeneration and stability of MOFs, assessing their reusability and long-term performance, which are essential for large-scale water treatment applications. Finally, our study highlights the challenges of removing PFASs using MOFs. Especially, the efficient removal of short-chain PFASs with hydrophilicity is a major challenge, while medium-to long-chain PFASs are frequently susceptible to being captured from water by MOFs through multiple synergistic effects. The ion-exchange force may be the key to solving this difficulty, but its susceptibility to ion interference in water needs to be addressed in practical applications. We hope that this review can provide valuable insights into the effective removal and adsorption mechanisms of PFASs as well as advance the sustainable utilization of MOFs in the field of water treatment, thereby presenting a novel perspective.

show abstract

Polymer-assisted modification of metal-organic framework MIL-96 (Al): influence of HPAM concentration on particle size, crystal morphology and removal of harmful environmental pollutant PFOA

Cited by 39 publications

References 74 publications

Energetic Systematics of Metal–Organic Frameworks: A Case Study of Al(III)-Trimesate MOF Isomers

Energetic Systematics of Metal–Organic Frameworks: A Case Study of Al(III)-Trimesate MOF Isomers

Low‐Symmetry MOF‐Based Patchy Colloids and Their Precise Linking via Site‐Selective Liquid Bridging to Form Supra‐Colloidal and Supra‐Framework Architectures

Metal–Organic Framework-Based Composites for the Adsorption Removal of Per- and Polyfluoroalkyl Substances from Water

Contact Info

Product

Resources

About