scholarly journals Application of Various Metal-Organic Frameworks (MOFs) as Catalysts for Air and Water Pollution Environmental Remediation

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 195 ◽  
Author(s):  
Sanha Jang ◽  
Sehwan Song ◽  
Ji Hwan Lim ◽  
Han Seong Kim ◽  
Bach Thang Phan ◽  
...  
Keyword(s):  
Water Pollution ◽  
Catalytic Activity ◽  
Environmental Pollution ◽  
Environmental Remediation ◽  
Metal Organic Framework ◽  
Rapid Development ◽  
Metal Organic Frameworks ◽  
Present Problem ◽  
Metal Organic ◽  
Near Future

The use of metal-organic frameworks (MOFs) to solve problems, like environmental pollution, disease, and toxicity, has received more attention and led to the rapid development of nanotechnology. In this review, we discuss the basis of the metal-organic framework as well as its application by suggesting an alternative of the present problem as catalysts. In the case of filtration, we have developed a method for preparing the membrane by electrospinning while using an eco-friendly polymer. The MOFs were usable in the environmental part of catalytic activity and may provide a great material as a catalyst to other areas in the near future.

Colloidal-sized zirconium porphyrin metal–organic frameworks with improved peroxidase-mimicking catalytic activity, stability and dispersity

The Analyst ◽  
2020 ◽  
Vol 145 (8) ◽  
pp. 3002-3008 ◽  
Author(s):  
Junning Wang ◽  
Tianxiang Wei ◽  
Yichen Liu ◽  
Mengyuan Bao ◽  
Rui Feng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Metal Organic ◽  
Organic Framework

A new and facile method was developed to synthesize a sub-100 nm zirconium porphyrin metal–organic framework with improved peroxidase-mimicking catalytic activity, stability and dispersity.

Engineering Metal-Organic Framework-Based Nanozymes for Enhanced Biosensing

2021 ◽  
Vol 17 ◽  
Author(s):  
Weiqing Xu ◽  
Yu Wu ◽  
Lei Jiao ◽  
Wenling Gu ◽  
Dan Du ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Design Strategy ◽  
Good Stability ◽  
Coordination Structure ◽  
Research Directions ◽  
Recent Advances ◽  
Metal Organic ◽  
Catalytic Mechanisms

Background: Nanozymes are a kind of emerging nanomaterials that can mimic the catalytic activity of natural enzymes with good stability. Objective: Benefited by the unique coordination structure and constitution, metal-organic frameworks (MOFs) have been widely exploited as novel nanozymes. Importantly, various MOFs engineered with fascinating functions provide great opportunities to enhance their enzyme-like activity and improve their applied performance, achieving the goal of vividly mimicking natural enzymes. Conclusion: This review summarized recent advances in the fabrication of the MOFs-based nanozymes and their applications in biosensing. First, MOFs-based nanomaterials containing pristine MOFs, functionalized MOFs, MOFs-based composites and MOFs derivatives are introduced, where the design strategy, enzyme-like activity and the catalytic mechanisms are highlighted systematically. Then, their applications in various target assays are summarized. Finally, the challenges and possible research directions for the development and application of MOFs-based nanozymes are provided.

The use of reduced copper metal–organic frameworks to facilitate CuAAC click chemistry

2016 ◽  
Vol 52 (82) ◽  
pp. 12226-12229 ◽  
Author(s):  
Q. Fu ◽  
K. Xie ◽  
S. Tan ◽  
J. M. Ren ◽  
Q. Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Click Chemistry ◽  
Structural Stability ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Copper Metal ◽  
Copper Halide ◽  
Click Reactions ◽  
Metal Organic ◽  
Organic Framework

A reduced copper metal–organic framework (rCu-MOF) containing CuI ions was prepared and employed as a catalyst for ‘Click’ reactions. The rCu-MOF presents higher catalytic activity, good structural stability as well as facile recyclability compared to traditional copper halide catalysts.

Metal Organic Framework Based Catalytic Nanoreactors (CatNRs): Synthetic Challenges and Applications

2021 ◽  
Author(s):  
Soumen Dutta ◽  
In Su Lee
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Protective Shell ◽  
Metal Organic ◽  
The Stability ◽  
Organic Framework

Catalytic nanoreactors have become hugely important in the field of heterogeneous catalysis due to their intriguing catalytic activity and the stability of the nanocatalysts inside the protective shell. Metal-organic frameworks...

scholarly journals Synthesis of Stable Hierarchical MIL-101(Cr) with Enhanced Catalytic Activity in the Oxidation of Indene

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 394 ◽  
Author(s):  
Tian Zhao ◽  
Ming Dong ◽  
Ling Yang ◽  
Yuejun Liu
Keyword(s):  
Catalytic Activity ◽  
Hierarchical Structure ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Structural Defects ◽  
Controllable Synthesis ◽  
Phenylphosphonic Acid ◽  
Practical Applications ◽  
Metal Organic ◽  
Dye Molecule

Nowadays, the controllable synthesis of stable hierarchical metal–organic frameworks (MOFs) is very important for practical applications, especially in catalysis. Herein, a well-known chromium–benzenedicarboxylate metal–organic framework, MIL-101(Cr), with a stable hierarchical structure, was produced by using phenylphosphonic acid (PPOA) as a modulator via the hydrothermal method. The presence of phenylphosphonic acid could create structural defects and generate larger mesopores. The synthesized hierarchical MIL-101(Cr) possesses relatively good porosity, and the larger mesopores had widths of 4–10 nm. The hierarchical MIL-101(Cr) showed significant improvement for catalytic activity in the oxidation of indene. Further, the presence of a hierarchical structure could largely enhance large dye molecule uptake properties by impregnating.

Phenanthroline-based metal–organic frameworks for Fe-catalyzed Csp3–H amination

2017 ◽  
Vol 201 ◽  
pp. 303-315 ◽  
Author(s):  
Nathan C. Thacker ◽  
Pengfei Ji ◽  
Zekai Lin ◽  
Ania Urban ◽  
Wenbin Lin
Keyword(s):  
Catalytic Activity ◽  
Active Catalyst ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Organic Transformations ◽  
Organic Azides ◽  
Highly Active ◽  
Earth Abundant ◽  
Metal Organic ◽  
Highly Porous

We report here the synthesis of a robust and highly porous Fe-phenanthroline-based metal–organic framework (MOF) and its application in catalyzing challenging inter- and intramolecular C–H amination reactions. For the intermolecular amination reactions, a FeBr2-metalated MOF selectively functionalized secondary benzylic and allylic C–H bonds. The intramolecular amination reactions utilizing organic azides as the nitrene source required the reduction of the FeBr2-metalated MOF with NaBHEt3 to generate the active catalyst. For both reactions, Fe or Zr leaching was less than 0.1%, and MOFs could be recycled and reused with no loss in catalytic activity. Furthermore, MOF catalysts were significantly more active than the corresponding homogeneous analogs. This work demonstrates the great potential of MOFs in generating highly active, recyclable, and reusable earth abundant metal catalysts for challenging organic transformations.

Triple-shelled CuO/CeO2 hollow nanospheres derived from metal–organic frameworks as highly efficient catalysts for CO oxidation

2019 ◽  
Vol 43 (40) ◽  
pp. 16096-16102 ◽  
Author(s):  
Xue-Zhi Song ◽  
Qiao-Feng Su ◽  
Shao-Jie Li ◽  
Si-Hang Liu ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Cyclic Stability ◽  
Hollow Nanospheres ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Through a metal–organic framework engaged strategy, triple-shelled CuO/CeO2-8% hollow nanospheres are fabricated as superior nanocatalysts for CO oxidation with excellent catalytic activity and cyclic stability.

Magnetic Ordering via Itinerant Ferromagnetism in a Metal-Organic Framework

2020 ◽  
Author(s):  
Jesse Park ◽  
Brianna Collins ◽  
Lucy Darago ◽  
Tomce Runcevski ◽  
Michael Aubrey ◽  
...  
Keyword(s):  
Charge Transport ◽  
Magnetic Order ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Itinerant Ferromagnetism ◽  
Organic Solids ◽  
Metal Organic ◽  
Organic Framework

<b>Materials that combine magnetic order with other desirable physical attributes offer to revolutionize our energy landscape. Indeed, such materials could find transformative applications in spintronics, quantum sensing, low-density magnets, and gas separations. As a result, efforts to design multifunctional magnetic materials have recently moved beyond traditional solid-state materials to metal–organic solids. Among these, metal–organic frameworks in particular bear structures that offer intrinsic porosity, vast chemical and structural programmability, and tunability of electronic properties. Nevertheless, magnetic order within metal–organic frameworks has generally been limited to low temperatures, owing largely to challenges in creating strong magnetic exchange in extended metal–organic solids. Here, we employ the phenomenon of itinerant ferromagnetism to realize magnetic ordering at <i>T</i><sub>C</sub> = 225 K in a mixed-valence chromium(II/III) triazolate compound, representing the highest ferromagnetic ordering temperature yet observed in a metal–organic framework. The itinerant ferromagnetism is shown to proceed via a double-exchange mechanism, the first such observation in any metal–organic material. Critically, this mechanism results in variable-temperature conductivity with barrierless charge transport below <i>T</i><sub>C</sub> and a large negative magnetoresistance of 23% at 5 K. These observations suggest applications for double-exchange-based coordination solids in the emergent fields of magnetoelectrics and spintronics. Taken together, the insights gleaned from these results are expected to provide a blueprint for the design and synthesis of porous materials with synergistic high-temperature magnetic and charge transport properties. </b>

Engineering Porosity Through Defects in a Giant Pore Metal–Organic Framework

2020 ◽  
Author(s):  
Adam Sapnik ◽  
Duncan Johnstone ◽  
Sean M. Collins ◽  
Giorgio Divitini ◽  
Alice Bumstead ◽  
...  
Keyword(s):  
Distribution Function ◽  
Ball Milling ◽  
Local Structure ◽  
Pair Distribution Function ◽  
Function Analysis ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Defect Engineering ◽  
Metal Organic ◽  
Unsaturated Metal Sites

<p>Defect engineering is a powerful tool that can be used to tailor the properties of metal–organic frameworks (MOFs). Here, we incorporate defects through ball milling to systematically vary the porosity of the giant pore MOF, MIL-100 (Fe). We show that milling leads to the breaking of metal–linker bonds, generating more coordinatively unsaturated metal sites, and ultimately causes amorphisation. Pair distribution function analysis shows the hierarchical local structure is partially</p><p>retained, even in the amorphised material. We find that the solvent toluene stabilises the MIL-100 (Fe) framework against collapse and leads to a substantial rentention of porosity over the non-stabilised material.</p>

Metal-Organic Frameworks vs. Buffers: Case Study of UiO-66 Stability

2020 ◽  
Author(s):  
Daniel Bůžek ◽  
Slavomír Adamec ◽  
Kamil Lang ◽  
Jan Demel
Keyword(s):  
Inductively Coupled Plasma ◽  
Buffer Capacity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Analytical Techniques ◽  
Aqueous Dispersions ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Metal Organic

<div><p>UiO-66 is a zirconium-based metal-organic framework (MOF) that has numerous applications. Our group recently determined that UiO-66 is not as inert in aqueous dispersions as previously reported in the literature. The present work therefore assessed the behaviour of UiO-66 in buffers: 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS), 4-(2-hydroxyethyl)piperazine-1-ethane sulfonic acid (HEPES), N-ethylmorpholine (NEM) and phosphate buffer (PB), all of which are commonly used in many UiO-66 applications. High pressure liquid chromatography and inductively coupled plasma mass spectrometry were used to monitor degradation of the MOF. In each buffer, the terephthalate linker was released to some extent, with a more pronounced leaching effect in the saline forms of these buffers. The HEPES buffer was found to be the most benign, whereas NEM and PB should be avoided at any concentration as they were shown to rapidly degrade the UiO-66 framework. Low concentration TRIS buffers are also recommended, although these offer minimal buffer capacity to adjust pH. Regardless of the buffer used, rapid terephthalate release was observed, indicating that the UiO-66 was attacked immediately after mixing with the buffer. In addition, the dissolution of zirconium, observed in some cases, intensified the UiO-66 decomposition process. These results demonstrate that sensitive analytical techniques have to be used to monitor the release of MOF components so as to quantify the stabilities of these materials in liquid environments.</p></div>

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