scholarly journals Fast Immobilization of Human Carbonic Anhydrase II on Ni-Based Metal-Organic Framework Nanorods with High Catalytic Performance

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 401
Author(s):  
Mengzhao Jiao ◽  
Jie He ◽  
Shanshan Sun ◽  
Frank Vriesekoop ◽  
Qipeng Yuan ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
High Efficiency ◽  
Specific Binding ◽  
Metal Organic Framework ◽  
Immobilized Enzymes ◽  
Catalytic Performance ◽  
Carbonic Anhydrase Ii ◽  
One Pot ◽  
Original Activity ◽  
Simple Strategy

Carbonic anhydrase (CA) has received considerable attention for its ability to capture carbon dioxide efficiently. This study reports a simple strategy for immobilizing recombinant carbonic anhydrase II from human (hCA II) on Ni-based MOFs (Ni-BTC) nanorods, which was readily achieved in a one-pot immobilization of His-tagged hCA II (His-hCA II). Consequently, His-hCA II from cell lysate could obtain an activity recovery of 99% under optimal conditions. After storing for 10 days, the immobilized His-hCA II maintained 40% activity while the free enzyme lost 91% activity. Furthermore, during the hydrolysis of p-nitrophenyl acetic acid, immobilized His-hCA II exhibited excellent reusability and still retained more than 65% of the original activity after eight cycles. In addition, we also found that Ni-BTC had no fixation effect on proteins without histidine-tag. These results show that the Ni-BTC MOFs have a great potential with high efficiency for and specific binding of immobilized enzymes.

One‐pot, Four‐Component Green Synthesis, Carbonic Anhydrase II Inhibition and Docking Studies of 5‐Arylidenerhodanines

2018 ◽  
Vol 3 (43) ◽  
pp. 12234-12242 ◽  
Author(s):  
Arif Mermer ◽  
Neslihan Demirbas ◽  
Ahmet Colak ◽  
Elif Ayazoglu Demir ◽  
Necla Kulabas ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Green Synthesis ◽  
Docking Studies ◽  
Carbonic Anhydrase Ii ◽  
One Pot

scholarly journals High Catalytic Efficiency of a Layered Coordination Polymer to Remove Simultaneous Sulfur and Nitrogen Compounds from Fuels

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 731
Author(s):  
Fátima Mirante ◽  
Ricardo F. Mendes ◽  
Filipe A. Almeida Paz ◽  
Salete S. Balula
Keyword(s):  
Coordination Polymer ◽  
High Efficiency ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Nitrogen Compounds ◽  
One Pot ◽  
Extraction Solvent ◽  
Desulfurization Process ◽  
Morphological Differences ◽  
Model Diesel

An ionic lamellar coordination polymer based on a flexible triphosphonic acid linker, [Gd(H4nmp)(H2O)2]Cl2 H2O (1) (H6nmp stands for nitrilo(trimethylphosphonic) acid), presents high efficiency to remove sulfur and nitrogen pollutant compounds from model diesel. Its oxidative catalytic performance was investigated using single sulfur (1-BT, DBT, 4-MDBT and 4,6-DMDBT, 2350 ppm of S) and nitrogen (indole and quinolone, 400 ppm of N) model diesels and further, using multicomponent S/N model diesel. Different methodologies of preparation followed (microwave, one-pot, hydrothermal) originated small morphological differences that did not influenced the catalytic performance of catalyst. Complete desulfurization and denitrogenation were achieved after 2 h using single model diesels, an ionic liquid as extraction solvent ([BMIM]PF6) and H2O2 as oxidant. Simultaneous desulfurization and denitrogenation processes revealed that the nitrogen compounds are more easily removed from the diesel phase to the [BMIM]PF6 phase and consequently, faster oxidized than the sulfur compounds. The lamellar catalyst showed a high recycle capacity for desulfurization. The reusability of the diesel/H2O2/[BMIM]PF6 system catalyzed by lamellar catalyst was more efficient for denitrogenation than for desulfurization process using a multicomponent model diesel. This behavior is not associated with the catalyst performance but it is mainly due to the saturation of S/N compounds in the extraction phase.

scholarly journals Synthesis and catalytic properties of nickel salts of Keggin-type heteropolyacids embedded metal-organic framework hybrid nanocatalyst

2020 ◽  
Vol 9 (1) ◽  
pp. 131-138 ◽  
Author(s):  
Qiuyun Zhang ◽  
Dan Ling ◽  
Dandan Lei ◽  
Taoli Deng ◽  
Yutao Zhang ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
High Specific Surface Area ◽  
Esterification Reaction ◽  
One Pot ◽  
Tem Analysis ◽  
Keggin Type ◽  
Metal Organic ◽  
Catalytic Transfer

AbstractNickel salts of Keggin-type heteropolyacid on Zr(IV)-based metal-organic frameworks (UiO-66) has been synthesized via ion-exchange followed by a facile one-pot hydrothermal method. The synthesized catalysts underwent FT-IR, N2 adsorption-desorption, powder XRD, SEM and TEM analysis. The NiHSiW/UiO-66 catalyst was used as a new and effective solid acid in the catalytic transfer free fatty acid to biodiesel with an optimum conversion of 86.7%. The excellent activity of the NiHSiW/UiO-66 nanocatalyst was closely related to its high specific surface area, nano-sized catalyst, and the synergistic effects of NiHSiW salts and UiO-66 matrix. Importantly, a relatively stable catalytic performance was achieved for 8 repeated cycles. Finally, kinetics of the esterification reaction have been assumed to be of pseudo first order.

Enzyme Immobilization on Metal-Organic Framework (MOF): Effects on Thermostability and Function

2019 ◽  
Vol 26 (9) ◽  
pp. 636-647
Author(s):  
Hassan Sher ◽  
Hazrat Ali ◽  
Muhammad H. Rashid ◽  
Fariha Iftikhar ◽  
Saif-ur-Rehman ◽  
...  
Keyword(s):  
Enzyme Immobilization ◽  
Metal Organic Framework ◽  
Immobilized Enzymes ◽  
Catalytic Performance ◽  
Metalorganic Frameworks ◽  
Chemical Catalysis ◽  
Diverse Field ◽  
Metal Organic ◽  
And Function ◽  
Soluble Enzymes

MOFs are porous materials with adjustable porosity ensuing a tenable surface area and stability. MOFs consist of metal containing joint where organic ligands are linked with coordination bonding rendering a unique architecture favouring the diverse applications in attachment of enzymes, Chemical catalysis, Gases storage and separation, biomedicals. In the past few years immobilization of soluble enzymes on/in MOF has been the topic of interest for scientists working in diverse field. The activity of enzyme, reusability, storage, chemical and thermal stability, affinity with substrate can be greatly improved by immobilizing of enzyme on MOFs. Along with improvement in enzymes properties, the high loading of enzyme is also observed while using MOFs as immobilization support. In this review a detail study of immobilization on/in Metalorganic Frameworks (MOFs) have been described. Furthermore, strategies for the enzyme immobilization on MOFs and resulting in improved catalytic performance of immobilized enzymes have been reported.

A new cobalt metal–organic framework as a substrate for Pd nanoparticles applied in high-efficiency nitro phenol degradation and cinnamaldehyde hydrogenation

2020 ◽  
Vol 49 (4) ◽  
pp. 1191-1199 ◽  
Author(s):  
Zhida Liu ◽  
Liangmin Ning ◽  
Kaiyuan Wang ◽  
Lixi Feng ◽  
Wen Gu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Metal Organic Framework ◽  
Phenol Degradation ◽  
Pd Nanoparticles ◽  
Research Direction ◽  
Catalytic Performance ◽  
Cobalt Metal ◽  
Cinnamaldehyde Hydrogenation ◽  
Metal Organic ◽  
Metal Materials

In recent years, attributed to the excellent catalytic performance of precious metal materials, metal nanoparticles@MOF catalyst has been a popular research direction.

scholarly journals A Novel Non-Enzymatic Electrochemical Hydrogen Peroxide Sensor Based on a Metal-Organic Framework/Carbon Nanofiber Composite

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2552 ◽  
Author(s):  
Yijun Fu ◽  
Jiamu Dai ◽  
Yan Ge ◽  
Yu Zhang ◽  
Huizhen Ke ◽  
...  
Keyword(s):  
High Efficiency ◽  
Carbon Nanofiber ◽  
Synergistic Effects ◽  
Metal Organic Framework ◽  
Synthesis Method ◽  
One Pot ◽  
Zeolitic Imidazolate Framework ◽  
X Ray ◽  
Metal Organic ◽  
Organic Framework

A co-based porous metal-organic framework (MOF) of zeolitic imidazolate framework-67 (ZIF-67) and carbon nanofibers (CNFs) was utilized to prepare a ZIF-67/CNFs composite via a one-pot synthesis method. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) were employed to investigate the morphology, structure, and composition of the resulting composite. A novel high-performance non-enzymatic electrochemical sensor was constructed based on the ZIF-67/CNFs composite. The ZIF-67/CNFs based sensor exhibited enhanced electrocatalytic activity towards H2O2 compared to a pure ZIF-67-based sensor, due to the synergistic effects of ZIF-67 and CNFs. Meanwhile, chronoamperometry was utilized to explore the detection performance of the sensor. Results showed the sensor displayed high-efficiency electrocatalysis towards H2O2 with a detection limit of 0.62 μM (S/N = 3), a sensitivity of 323 µA mM−1 cm−2, a linear range from 0.0025 to 0.19 mM, as well as satisfactory selectivity and long-term stability. Furthermore, the sensor demonstrated its application potential in the detection of H2O2 in food.

scholarly journals Recyclable Magnetic Cu/CuFe2O4 Nanocomposites for the Rapid Degradation of 4-NP

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1437
Author(s):  
Hui Zheng ◽  
Jie Huang ◽  
Tianxiang Zhou ◽  
Yumeng Jiang ◽  
Yuhong Jiang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Catalytic Reduction ◽  
Magnetic Measurements ◽  
Catalytic Performance ◽  
Magnetic Saturation ◽  
One Pot ◽  
Synthetic Process ◽  
Catalytic Activities ◽  
Molar Ratios ◽  
The One

Magnetic Cu/CuFe2O4 nanocomposites were prepared by the one-pot thermal decomposition of acetylacetone compounds. Adjusting the molar ratios of Fe to Cu was used to control the content of Cu in the synthetic process. XRD, TEM, XPS and UV-Vis were employed to reveal detailed structural and catalytic activities of Cu/CuFe2O4 nanocomposites. Magnetic measurements demonstrated that Cu/CuFe2O4 nanocomposites possessed a considerable magnetic saturation. Cu/CuFe2O4 nanocomposites showed superb efficiency in the degradation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). 4-NP could be reduced by Cu/CuFe2O4 nanocomposites within 40 s in the attendance of NaBH4. Cu nanocrystals played an indispensable rose in the enhancement of catalytic performance. The synergistic effect of Cu and CuFe2O4 nanocrystals achieved the high-efficiency catalytic reduction for 4-NP. After six recycling experiments, the efficiency of Cu/CuFe2O4 nanocomposites was almost stable. Our work advances a straightforward strategy to synthesize efficient and recoverable Cu/CuFe2O4 nanocomposites, which has promising utilizations in the purifying of nitrophenolic contamination.

Chlorosulfonic Acid Supported Piperidine-4-carboxylic Acid (PPCA) Functionalized Fe3O4 Nanoparticles (Fe3O4-PPCA): The Efficient, Green and Reusable Nanocatalyst for the Synthesis of Pyrazolyl Coumarin Derivatives under Solvent-Free Conditions

2019 ◽  
Vol 22 (2) ◽  
pp. 123-128
Author(s):  
Setareh Habibzadeh ◽  
Hassan Ghasemnejad-Bosra ◽  
Mina Haghdadi ◽  
Soheila Heydari-Parastar
Keyword(s):  
Carboxylic Acid ◽  
Fe3o4 Nanoparticles ◽  
High Efficiency ◽  
Reaction Times ◽  
Chlorosulfonic Acid ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Magnetic Nanocatalyst ◽  
One Pot ◽  
Solvent Free Conditions

Background: In this study, we developed a convenient methodology for the synthesis of coumarin linked to pyrazolines and pyrano [2,3-h] coumarins linked to 3-(1,5-diphenyl-4,5- dihydro-1H-pyrazol-3-yl)-chromen-2-one derivatives using Chlorosulfonic acid supported Piperidine-4-carboxylic acid (PPCA) functionalized Fe3O4 nanoparticles (Fe3O4-PPCA) catalyst. Materials and Methods:: Fe3O4-PPCA was investigated as an efficient and magnetically recoverable Nanocatalyst for the one-pot synthesis of substituted coumarins from the reaction of coumarin with a variety of aromatic aldehydes in high to excellent yield at room temperature under solvent-free conditions. The magnetic nanocatalyst can be easily recovered by applying an external magnet device and reused for at least 10 reaction runs without considerable loss of reactivity. Results and Conclusion: The advantages of this protocol are the use of commercially available materials, simple and an inexpensive procedure, easy separation, and an eco-friendly procedure, and it shows good reaction times, good to high yields, inexpensive and practicability procedure, and high efficiency.

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