A Zr metal–organic framework based on tetrakis(4-carboxyphenyl) silane and factors affecting the hydrothermal stability of Zr-MOFs

2015 ◽  
Vol 44 (17) ◽  
pp. 8049-8061 ◽  
Author(s):  
Shufen Wang ◽  
Jingjing Wang ◽  
Weiwei Cheng ◽  
Xiaowei Yang ◽  
Zaiyong Zhang ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Hydrothermal Stability ◽  
Factors Affecting ◽  
Metal Organic ◽  
Organic Framework

A new Zr-MOF based on tetrakis(4-carboxyphenyl) silane was synthesized, and factors affecting the hydrothermal stabilities of Zr-MOFs are discussed.

scholarly journals Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 774
Author(s):  
Abdelfattah Amari ◽  
Fatimah Mohammed Alzahrani ◽  
Norah Salem Alsaiari ◽  
Khadijah Mohammedsaleh Katubi ◽  
Faouzi Ben Rebah ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Covalent Binding ◽  
Residual Activity ◽  
Reactive Black 5 ◽  
Optimum Conditions ◽  
Alizarin Red ◽  
Immobilized Laccase ◽  
Factors Affecting ◽  
Metal Organic ◽  
Organic Framework

The laccase enzyme was successfully immobilized over a magnetic amino-functionalized metal–organic framework Fe3O4-NH2@MIL-101(Cr). Different techniques were used for the characterization of the synthesized materials. The Fe3O4-NH2@MIL-101(Cr) laccase showed excellent resistance to high temperatures and low pH levels with a high immobilization capacity and large activity recovery, due to the combination of covalent binding and adsorption advantages. The long-term storage of immobilized laccase for 28 days indicated a retention of 88% of its initial activity, due to the high stability of the immobilized system. Furthermore, a residual activity of 49% was observed at 85 °C. The immobilized laccase was effectively used for the biodegradation of Reactive Black 5 (RB) and Alizarin Red S (AR) dyes in water. The factors affecting the RB and AR degradation using the immobilized laccase (dye concentration, temperature and pH) were investigated to determine the optimum treatment conditions. The optimum conditions for dye removal were a 5 mg/L dye concentration, temperature of 25 °C, and a pH of 4. At the optimum conditions, the biodegradation and sorption-synergistic mechanism of the Fe3O4-NH2@MIL-101(Cr) laccase system caused the total removal of AR and 81% of the RB. Interestingly, the reusability study of this immobilized enzyme up to five cycles indicated the ability to reuse it several times for water treatment.

Evaluation of the highly stable metal–organic framework MIL-53(Al)-TDC (TDC = 2,5-thiophenedicarboxylate) as a new and promising adsorbent for heat transformation applications

2018 ◽  
Vol 6 (36) ◽  
pp. 17706-17712 ◽  
Author(s):  
Niels Tannert ◽  
Sebastian-Johannes Ernst ◽  
Christian Jansen ◽  
Hans-Jörg Bart ◽  
Stefan K. Henninger ◽  
...  
Keyword(s):  
Water Sorption ◽  
Metal Organic Framework ◽  
Hydrothermal Stability ◽  
Sorption Properties ◽  
Metal Organic ◽  
Water Sorption Properties ◽  
Heat Transformation ◽  
Organic Framework

MIL-53(Al)-TDC shows good hydrothermal stability and desirable water sorption properties for heat transformation applications.

A Twofold Interpenetrating Porous Metal−Organic Framework with High Hydrothermal Stability: Structure and Gas Sorption Behavior

2009 ◽  
Vol 48 (24) ◽  
pp. 11507-11509 ◽  
Author(s):  
Xinfang Liu ◽  
Mira Park ◽  
Seunghee Hong ◽  
Minhak Oh ◽  
Ji Woong Yoon ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Hydrothermal Stability ◽  
Sorption Behavior ◽  
Gas Sorption ◽  
Stability Structure ◽  
Metal Organic ◽  
Organic Framework

scholarly journals A review on metal-organic framework: synthesis, properties and application

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Sanju Soni 1 ◽  
Parmendra Kumar Bajpai 2 ◽  
Charu Arora 2
Keyword(s):  
Metal Organic Framework ◽  
Hybrid Network ◽  
Current Status ◽  
Factors Affecting ◽  
New Directions ◽  
Synthesis Properties ◽  
Methods Of Synthesis ◽  
Metal Organic ◽  
Structural Aspects ◽  
Organic Framework

 Metal organic framework is a class of hybrid network of supramolecular solid materials comprised of a large number of inorganic and organic linkers all bounded to metal ions in a well organised fashion. This type of compounds possess a greater surface area with an advantage of changing pore sizes, diversified and beautiful structure which withdrew an intense interest in this field. In the present review article structural aspects; classification; methods of synthesis; various factors affecting the synthesis and stability; properties and applications have been discussed. Recent advances in the field and new directions to explore the future scope and applications of MOFs have been incorporated to provide current status of the field.

Multifunctional metal–organic framework heterostructures for enhanced cancer therapy

2021 ◽  
Author(s):  
Jintong Liu ◽  
Jing Huang ◽  
Lei Zhang ◽  
Jianping Lei
Keyword(s):  
Cancer Therapy ◽  
General Principle ◽  
Biomedical Applications ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Functional Modulation ◽  
Organic Framework

We review the general principle of the design and functional modulation of nanoscaled MOF heterostructures, and biomedical applications in enhanced therapy.

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>

Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Mesoporous Metal-Organic Framework MAF-6

2019 ◽  
Author(s):  
Timothée Stassin ◽  
Ivo Stassen ◽  
Joao Marreiros ◽  
Alexander John Cruz ◽  
Rhea Verbeke ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Chemical Vapor ◽  
Uptake Capacity ◽  
Powder Synthesis ◽  
Crystalline Films ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time ◽  
Organic Framework

A simple solvent- and catalyst-free method is presented for the synthesis of the mesoporous metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, mesoporous crystalline films could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of the mesoporous MAF-6 in comparison to the microporous ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

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