Tuning the aspect ratio of NH<sub>2</sub>-MIL-53(Al) microneedles and nanorodsvia coordination modulation

Chin, Jia Min; Chen, Eric Yu; Menon, Ajay Govinda; Tan, Han Yang; Hor, T. S. Andy; Schreyer, Martin; Xu, Jianwei

doi:10.1039/c2ce26586a

Cited by 88 publications

(67 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, Xu et al [274] observed that the synthesis of NH 2 -MIL-53 in the presence of NaOH yielded nanoparticles of this MOF with a narrow size distribution (see Figure 35). They reasoned that upon increasing the pH of the reaction medium, more carboxylic linkers are in their deprotonated form, thus providing numerous nucleation sites, which usually yields smaller particles.…”

Section: Non-coordinating Modulatorsmentioning

confidence: 97%

“…Experiments with only TEA and with TEA/AcOH mixtures further confirm that the combination of deprotonation rate and coordination competition was responsible for the crystal engineering. Indeed, using acetic acid in its protonated or deprotonated form also had a clear effect in the formation of NH 2 -MIL-53(Al) crystallites, which formed either as microneedles or nanorods, respectively [274].…”

Section: Two Modulation Mechanisms In Tandemmentioning

confidence: 99%

See 1 more Smart Citation

Multi-scale crystal engineering of metal organic frameworks

Seoane

Castellanos

Dikhtiarenko

et al. 2016

Coordination Chemistry Reviews

268

163

View full text Add to dashboard Cite

Section: Non-coordinating Modulatorsmentioning

confidence: 97%

Section: Two Modulation Mechanisms In Tandemmentioning

confidence: 99%

Multi-scale crystal engineering of metal organic frameworks

Seoane

Castellanos

Dikhtiarenko

et al. 2016

Coordination Chemistry Reviews

268

163

View full text Add to dashboard Cite

“…These structures were made with Diamond 3.2. using the corresponding cif files. [9][10][11] The co-polyimide P84 has been reported to be stable in organic solvents including polar aprotic solvents such as dichloromethane (DCM), tetrahydrofuran (THF), Nmethylpyrrolidone (NMP) and dimethylformamide (DMF) after chemical crosslinking. 4 When this polyimide is crosslinked and used as a support for TFC membranes, it permits the post-treatment of the TFC membranes with aggressive polar aprotic solvents (DMF or dimethyl sulfoxide) which modify the surface, removing small molecular fragments and generating a more open structure thus enhancing permeation fluxes without sacrificing rejection.…”

Section: Introductionmentioning

confidence: 99%

High Flux Thin Film Nanocomposite Membranes Based on Metal–Organic Frameworks for Organic Solvent Nanofiltration

et al. 2013

View full text Add to dashboard Cite

Thin-film nanocomposite membranes containing a range of 50-150 nm metal-organic framework (MOF) nanoparticles [ZIF-8, MIL-53(Al), NH2-MIL-53(Al) and MIL-101(Cr)] in a polyamide (PA) thin film layer were synthesized via in situ interfacial polymerization on top of cross-linked polyimide porous supports. MOF nanoparticles were homogeneously dispersed in the organic phase containing trimesoyl chloride prior to the interfacial reaction, and their subsequent presence in the PA layer formed was inferred by a combination of contact angle measurements, FT-IR spectroscopy, SEM, EDX, XPS, and TEM. Membrane performance in organic solvent nanofiltration was evaluated on the basis of methanol (MeOH) and tetrahydrofuran (THF) permeances and rejection of styrene oligomers (PS). The effect of different post-treatments and MOF loadings on the membrane performance was also investigated. MeOH and THF permeance increased when MOFs were embedded into the PA layer, whereas the rejection remained higher than 90% (molecular weight cutoff of less than 232 and 295 g·mol(-1) for MeOH and THF, respectively) in all membranes. Moreover, permeance enhancement increased with increasing pore size and porosity of the MOF used as filler. The incorporation of nanosized MIL-101(Cr), with the largest pore size of 3.4 nm, led to an exceptional increase in permeance, from 1.5 to 3.9 and from 1.7 to 11.1 L·m(-2)·h(-1)·bar(-1) for MeOH/PS and THF/PS, respectively.

show abstract

“…In addition, its Al element on the substrate surface could be used as the active sites for MOF growth. Consequently, intergrown MIL-53(Al) crystals would be formed, which not only eliminates the delamination issue but also allows the synthesis of nano-and hierarchical roughness by controlling the aspect ratio of MIL-53(Al) [28]. NH 2 -MIL-53(Al) is an amino derivative of MIL-53(Al), which utilizes 2-amino terephthalic acid as the organic linker.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Zuo

Chung

2016

Water

View full text Add to dashboard Cite

Nature-mimetic hydrophobic membranes with high wetting resistance have been designed for seawater desalination via vacuum membrane distillation (VMD) in this study. This is achieved through molecular engineering of metal-organic framework (MOF)-functionalized alumina surfaces. A two-step synthetic strategy was invented to design the hydrophobic membranes: (1) to intergrow MOF crystals on the alumina tube substrate and (2) to introduce perfluoro molecules onto the MOF functionalized membrane surface. With the first step, the surface morphology, especially the hierarchical roughness, can be controlled by tuning the MOF crystal structure. After the second step, the perfluoro molecules function as an ultrathin layer of hydrophobic floss, which lowers the surface energy. Therefore, the resultant membranes do not only possess the intrinsic advantages of alumina supports such as high stability and high water permeability, but also have a hydrophobic surface formed by MOF functionalization. The membrane prepared under an optimum condition achieved a good VMD flux of 32.3 L/m 2 -h at 60 • C. This study may open up a totally new approach for design of next-generation high performance membrane distillation membranes for seawater desalination.

show abstract

Tuning the aspect ratio of NH₂-MIL-53(Al) microneedles and nanorodsvia coordination modulation

Cited by 88 publications

References 30 publications

Multi-scale crystal engineering of metal organic frameworks

Multi-scale crystal engineering of metal organic frameworks

High Flux Thin Film Nanocomposite Membranes Based on Metal–Organic Frameworks for Organic Solvent Nanofiltration

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Contact Info

Product

Resources

About

Tuning the aspect ratio of NH2-MIL-53(Al) microneedles and nanorodsvia coordination modulation

Cited by 88 publications

References 30 publications

Multi-scale crystal engineering of metal organic frameworks

Multi-scale crystal engineering of metal organic frameworks

High Flux Thin Film Nanocomposite Membranes Based on Metal–Organic Frameworks for Organic Solvent Nanofiltration

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Contact Info

Product

Resources

About

Tuning the aspect ratio of NH₂-MIL-53(Al) microneedles and nanorodsvia coordination modulation