Pore Tuning of Metal‐Organic Framework Membrane Anchored on Graphene‐Oxide Nanoribbon

Choi, Eunji; Kim, Yong Jae; Choi, Seung Eun; Choi, Yunkyu; Kim, Ji Hoon; Kang, Junhyeok; Kwon, Ohchan; Eum, Kiwon; Han, Byungchan; Kim, Dae Woo

doi:10.1002/adfm.202011146

Cited by 36 publications

(34 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3D is a model representation depicting the influence of the ZIF-8 fillers on the transport pathway of the 6FDA-DAM polymeric membrane. The sieving properties of ZIF-8 arise because of the varying transport resistance of the gases, where fast-passage propylene molecules are permitted through the crystals, while propane permeation is hindered because of the 4 Å aperture size, which is smaller than the kinetic diameter of propane (4.3 Å) ( 24 , 51 , 52 ). Therefore, ZIF-8–containing MMMs show better separation performance than pristine 6FDA-DAM membranes.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 1A provides a schematic of ZIF-8 nanoplate synthesis. Among the various MOF crystals, ZIF-8 was selected owing to its effective aperture size of approximately 4 Å, which is ideal for separating propylene/propane molecules and is the most widely studied MOF for gas separation (24)(25)(26). The ZIF-8 nanoplates are developed by first synthesizing a high-aspect ratio Zn template in the form of Zn 5 (NO 3 ) 2 (OH) 8 .…”

Section: Synthesis Of Zif-8 Nanoplate Via Conversion Methodsmentioning

confidence: 99%

See 1 more Smart Citation

High–aspect ratio zeolitic imidazolate framework (ZIF) nanoplates for hydrocarbon separation membranes

et al. 2022

Self Cite

View full text Add to dashboard Cite

Metal-organic frameworks with high aspect ratios have the potential to yield high-performance gas separation membranes. We demonstrate the scalable synthesis of high-aspect ratio zeolitic imidazolate framework (ZIF)-8 nanoplates via a direct template conversion method in which high aspect ratio-layered Zn hydroxide sheets [Zn 5 (NO 3 ) 2 (OH) 8 ] were used as the sacrificial precursor. Successful phase conversion occurs as a result of the collaboration of low template stability and delayed delivery of 2-methylimidazole in weakly interacting solvents, particularly using acetone. When the ZIF-8 nanoplates with an average aspect ratio of 20 were shear aligned in the 6FDA-DAM polymer matrix by bar coating, the separation performance for propylene/propane far surpassed that of the previously reported mixed matrix and polymeric membranes, showing a propylene permeability of 164 Barrer and selectivity of 33.4 at 40 weight % loadings.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Zif-8 Nanoplate Via Conversion Methodsmentioning

confidence: 99%

High–aspect ratio zeolitic imidazolate framework (ZIF) nanoplates for hydrocarbon separation membranes

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Based upon data from synchrotron X-ray scattering, density-functional theory (DFT) and molecular dynamics simulations, and other techniques, it is generally accepted that ZIF formation involves a sequence of events starting from the formation of small (~1 nm) metastable prenucleation clusters, which evolve through aggregation followed by intraaggregate ZIF nucleation and growth. Recent studies on surface-directed MOF growth [38][39][40][41][42][43][44][45][46] indicate that the diffusion of MOF precursors in the vicinity of the 2D material, and the MOF-2D material interactions, are key to regulate the crystallinity of the MOF film and the ability to maintain in-plane/horizontal growth (desired for ultrathin films) versus out-of-plane/vertical (undesired) growth.…”

Section: Main Textmentioning

confidence: 99%

Nanometer-thick crystalline and amorphous zeolitic imidazolate framework films for membrane and patterning applications

Liu

Miao

Villalobos

et al. 2023

Preprint

View full text Add to dashboard Cite

Zeolitic imidazolate frameworks (ZIFs) are a subset of metal-organic frameworks (MOFs) with more than 200 characterized crystalline and amorphous networks made of divalent transition metal centers (e.g., Zn2+ and Co2+) linked by imidazolate linkers. ZIF thin films have been pursued intensively motivated by the desire to prepare membranes for selective gas and liquid separations. To achieve membranes with high throughput, as in Å-scale biological channels with nanometer-scale pathlengths, ZIF films with the minimum possible thickness, down to just one unit cell, are highly desired. Control of ZIF film thickness at the 10-nm-scale may also enable emerging, MOF-inspired, applications including patterned crystalline MOF films, and amorphous organic-inorganic resists for high-resolution electron-beam (e-beam) and extreme UV (EUV) lithography. However, the state-of-the-art methods yield ZIF films with thicknesses exceeding 40 nanometers. Here, we report a deposition method from ultra-dilute precursor mixtures that within minutes yields uniform ZIF deposits with nm-scale thickness control. On crystalline substrate such as graphene, two-dimensional crystalline ZIF (2DZIF) film with thickness of a unit-cell could be achieved, which composed of a six-membered zincimidazolate coordination ring enabling record-high H2 permselective separation performance. Deposition under identical conditions on amorphous substrates yields macroscopically smooth amorphous ZIF (aZIF) films, which can be used as negative- and positive-tone resists yielding pattern features down to 20 nm. The method reported here will likely accelerate the development of 2D crystalline and ultrathin amorphous MOF films for applications ranging from separation membranes to sensors and patterning for microelectronic applications.

show abstract

“…The key component of an electrochemical sensor is the electrode material, so this material must be carefully designed to achieve enhanced sensing performance. In this context, it has been previously reported that electrode materials possessing large surface areas, abundant active sites, and specific responses toward HMIs are of particular interest. − From this perspective, the emergence of metal–organic frameworks (MOFs), which are assembled with structure-directing organic ligands and metal centers, has received attention for the preparation of promising electrode materials because of their open metal sites, tunable structures, and large surface areas. − Thiacalix[4]arene-based derivatives, which possess large inner cavities and functionalized upper and lower edges, are good organic ligands for use in the preparation of metal–organic assemblies. − In these systems, the introduced functional groups, such as −SH, −NH 2 , and −COOH groups, can interact with HMIs using Lewis acid–base attractions. − Furthermore, thiacalix[4]arene-based complexes contain abundant phenyl rings, which promote binding to HMIs through cation···π interactions. In addition, their self-assembled pore structures can accelerate the adsorption response toward HMIs, which is beneficial for the preconcentration process of HMIs. , For instance, Wang et al designed a new sulfur-containing MOF sensor that was formed by the self-assembly of calix[4]resorcinarenes, Co(II) cations, and 1,4-benzenedicarboxylic acid, and this sensor exhibited an excellent capture and detection performance toward HMIs .…”

Section: Introductionmentioning

confidence: 99%

Sulfur-Bridged Co(II)-Thiacalix[4]arene Metal–Organic Framework as an Electrochemical Sensor for the Determination of Toxic Heavy Metals

Guo¹,

Cao²,

An³

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

A novel sulfur-bridged metal–organic framework (MOF) [Co(TIC4R-I) 0.25 Cl 2 ]·3CH 3 OH (Co-TIC4R-I) based on thiacalix[4]arene derivatives was successfully obtained using a solvothermal method. Remarkably, adjacent TIC4R-I ligands were linked via Co(II) cations to form a three-dimensional (3D) microporous architecture. Subsequently, Co-TIC4R-I was modified on a glassy carbon electrode (Co-TIC4R-I/GCE) to produce an electrochemical sensor for the detection of heavy-metal ions (HMIs), namely, Cd2+, Pb2+, Cu2+, and Hg2+, in aqueous solutions. It was found that Co-TIC4R-I/GCE exhibited wide linear detection ranges of 0.10–17.00, 0.05–16.00, 0.05–10.00, and 0.80–15.00 μM for Cd2+, Pb2+, Cu2+, and Hg2+, respectively, in addition to low limit of detection (LOD) values of 0.017, 0.008, 0.016, and 0.007 μM. Moreover, the fabricated sensor employed for the simultaneous detection of these metals has achieved LOD values of 0.0067, 0.0027, 0.0064, and 0.0037 μM for Cd2+, Pb2+, Cu2+, and Hg2+, respectively. The sensor also exhibited satisfactory selectivity, reproducibility, and stability. Furthermore, the relative standard deviation (RSD) values of Cd2+, Pb2+, Cu2+, and Hg2+ were 3.29, 3.73, 3.11, and 1.97%, respectively. Moreover, the fabricated sensor could sensitively detect HMIs in various environmental samples. The high performance of the sensor was attributed to its sulfur adsorption sites and abundant phenyl rings. Overall, the sensor described herein provides an efficient method for the determination of extremely low concentrations of HMIs in aqueous samples.

show abstract

Pore Tuning of Metal‐Organic Framework Membrane Anchored on Graphene‐Oxide Nanoribbon

Cited by 36 publications

References 68 publications

High–aspect ratio zeolitic imidazolate framework (ZIF) nanoplates for hydrocarbon separation membranes

High–aspect ratio zeolitic imidazolate framework (ZIF) nanoplates for hydrocarbon separation membranes

Nanometer-thick crystalline and amorphous zeolitic imidazolate framework films for membrane and patterning applications

Sulfur-Bridged Co(II)-Thiacalix[4]arene Metal–Organic Framework as an Electrochemical Sensor for the Determination of Toxic Heavy Metals

Contact Info

Product

Resources

About