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.

scholarly journals Comparison of Catalytic Activity of Chromium–Benzenedicarboxylate Metal–Organic Framework Based on Various Synthetic Approach

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 318 ◽  
Author(s):  
Tian Zhao ◽  
Hexin Zhu ◽  
Ming Dong
Keyword(s):  
Catalytic Activity ◽  
Hierarchical Structure ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Synthetic Approach ◽  
Phenylphosphonic Acid ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
Organic Framework

MIL-101(Cr), as a prototypical mesoporous metal–organic framework (MOF), can be facially prepared by involving different modulators to fit various demands. In this paper, a range of MIL-101(Cr) products were prepared under similar conditions. It was found that one of the additives, phenylphosphonic acid (PPOA), could give a stable hierarchical structure material. Compared to other MIL-101(Cr)s, though hierarchical MIL-101(Cr) showed less porosity, it gave a better catalytic performance in the oxidation of indene and 1-dodecene.

Binder-Free mechanochemical metal-organic framework nanocrystal coatings

Nanoscale ◽  
2022 ◽  
Author(s):  
Rijia Lin ◽  
Yuqi Yao ◽  
Muhammad Yazid Bin Zulkifli ◽  
Xuemei Li ◽  
Shuai Gao ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Practical Applications ◽  
Metal Organic ◽  
Binder Free ◽  
Organic Framework

The practical applications of metal-organic frameworks (MOFs) usually require their assembly into mechanically robust structures, usually achieved via coating onto various types of substrates. This paper describes a simple, scalable,...

Controllable synthesis of urchin-like hierarchical superstructure MOFs with high catalytic activity and stability

2021 ◽  
Author(s):  
Zhanke Wang ◽  
Lei Ge ◽  
Guangxu Zhang ◽  
Rongrong Gao ◽  
Hao Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Metal Organic Frameworks ◽  
High Catalytic Activity ◽  
Controllable Synthesis ◽  
Metal Organic ◽  
Self Assembled

A novel dissolution-crystallization strategy was developed to synthesize urchin-like superstructure metal-organic frameworks (MOFs) with self-assembled 1D nanorods. The superstructure MOFs not only inherit the high activity of nano-sized MOFs but...

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.

High Hydrogen Release Catalytic Activity by Quasi-MOF Prepared via Post-Synthetic Pore Engineering

2021 ◽  
Author(s):  
Minoo Bagheri ◽  
Mohammad Yaser Mohammad Yaser Masoomi ◽  
Esther Dominguez ◽  
Hermenegildo Garcia
Keyword(s):  
Catalytic Activity ◽  
Metal Organic Framework ◽  
Hydrogen Release ◽  
Structural Defects ◽  
High Hydrogen ◽  
Metal Organic ◽  
Organic Framework

The catalytic activity of metal-organic framewroks (MOFs) depends largely on the presence of structural defects. In the present stuyd, cobalt based metal-organic framework TMU-10, [Co6(oba)5(OH)2(H2O)2(DMF)4]n·2DMF has been submitted under controlled...

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...

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.

Gold nanoparticles decorated rGO-encapsulated metal-organic frameworks composite sensor for the detection of dopamine

2020 ◽  
Author(s):  
Shaoming Yang ◽  
Jian Zhang ◽  
Chaopeng Bai ◽  
Kaiqiang Deng
Keyword(s):  
Gold Nanoparticles ◽  
Modified Electrode ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
High Catalytic Activity ◽  
Practical Applications ◽  
Reduced Graphene ◽  
Morphology And Structure ◽  
Metal Organic ◽  
Composite Sensor

In this study by way of encapsulation of reduced graphene oxide (rGO) into Ni-based metal-organic framework (Ni-MOFs) structure, the composite rGO@Ni-MOFs was first prepared. Then gold nanoparticles (AuNPs) decorated rGO@Ni-MOFs (rGO@Ni-MOFs/AuNPs) was obtained through the electrodeposition. The morphology and structure of rGO@Ni-MOFs/AuNPs were characterized by SEM, FTIR and XRD. The rGO@Ni-MOFs/AuNPs modified electrode was used for the detection of dopamine (DA). The combining the catalysis from Ni-MOFs and AuNPs with the conductivity of rGO endowed rGO@Ni-MOFs/AuNPs with synergetic high catalytic activity to the electrochemical oxidation of DA. The developed modified electrode had a good linear relationship with DA in the concentration range of 0.5 μM～120 μM, and the detection limit was 0.33 μM (S/N=3). Additionally, the potential interferents, electrode stability, reproducibility and practical applications were also studied and satisfactory results were obtained.

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