Facile one-pot phytosynthesis of magnetic nanoparticles using potato extract and their catalytic activity

2016 ◽  
Vol 68 (7-8) ◽  
pp. 796-804 ◽  
Author(s):  
Foad Buazar ◽  
Mina H. Baghlani-Nejazd ◽  
Mohamad Badri ◽  
Mehdi Kashisaz ◽  
Ali Khaledi-Nasab ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
One Pot ◽  
Potato Extract

scholarly journals Immobilized antimony species on magnetite: a novel and highly efficient magnetically reusable nanocatalyst for direct and gram-scale reductive-coupling of nitroarenes to azoarenes

RSC Advances ◽  
2019 ◽  
Vol 9 (23) ◽  
pp. 13112-13121 ◽  
Author(s):  
Behzad Zeynizadeh ◽  
Fariba Faraji
Keyword(s):  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
Nitro Compounds ◽  
Reductive Coupling ◽  
One Pot ◽  
Highly Efficient ◽  
Aromatic Nitro Compounds ◽  
Aromatic Nitro

In this study, magnetic nanoparticles of Fe3O4@SbFx were synthesized. Then, the catalytic activity of Fe3O4@SbFx MNPs was highlighted by one-pot reductive-coupling of aromatic nitro compounds to the corresponding azoarene materials with NaBH4.

Magnetically Responsive Horseradish peroxidase@ZIF-8 for Biocatalysts

2019 ◽  
Author(s):  
Raffaele Ricco ◽  
Heinz Amenitsch ◽  
paolo falcaro
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Horseradish Peroxidase ◽  
Zinc Acetate ◽  
One Pot ◽  
Guest Species ◽  
Catalytically Active ◽  
Iron Oxide Magnetic Nanoparticles ◽  
Kinetics Of

<div>Here, we studied a catalytically active and magnetically responsive porous bio-composite obtained from the synthesis of ZIF-8 in presence of iron oxide magnetic nanoparticles and horseradish peroxidase (HRP) enzyme as guest species. Using a one-pot approach in water the precursors of ZIF-8 (zinc acetate and 2-methylimidazole) spontaneously self-assembles around the guest species. We characterized the composite by means of XRD, SEM, FTIR, AFM, and CLSM. SAXS investigation of the kinetics of crystallization showed how the presence of the guest species can act as nucleation seeds. Moreover, we found that the bio-catalytic activity of the HRP/MNP@ZIF-8 biocomposite is 5 times higher than the analoguous composite without MNPs.</div>

Magnetically Responsive Horseradish peroxidase@ZIF-8 for Biocatalysts

2019 ◽  
Author(s):  
Raffaele Ricco ◽  
Heinz Amenitsch ◽  
paolo falcaro
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Horseradish Peroxidase ◽  
Zinc Acetate ◽  
One Pot ◽  
Guest Species ◽  
Catalytically Active ◽  
Iron Oxide Magnetic Nanoparticles ◽  
Kinetics Of

<div>Here, we studied a catalytically active and magnetically responsive porous bio-composite obtained from the synthesis of ZIF-8 in presence of iron oxide magnetic nanoparticles and horseradish peroxidase (HRP) enzyme as guest species. Using a one-pot approach in water the precursors of ZIF-8 (zinc acetate and 2-methylimidazole) spontaneously self-assembles around the guest species. We characterized the composite by means of XRD, SEM, FTIR, AFM, and CLSM. SAXS investigation of the kinetics of crystallization showed how the presence of the guest species can act as nucleation seeds. Moreover, we found that the bio-catalytic activity of the HRP/MNP@ZIF-8 biocomposite is 5 times higher than the analoguous composite without MNPs.</div>

scholarly journals Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Hossein Abdollahi-Basir ◽  
Boshra Mirhosseini-Eshkevari ◽  
Farzad Zamani ◽  
Mohammad Ali Ghasemzadeh
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Metal Organic Framework ◽  
One Pot ◽  
Short Reaction Time ◽  
Three Component Reaction ◽  
Metal Organic ◽  
Ft Ir ◽  
Novel Catalyst

AbstractA one-pot three component reaction of benzaldehydes, 1H-tetrazole-5-amine, and 3-cyanoacetyl indole in the presence of a new hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework as a recyclable catalyst was explored. This novel catalyst, which was fully characterized by XRD, FE-SEM, EDX, FT-IR, TGA, BET, and TEM exhibited outstanding catalytic activity for the preparation of a range of pharmaceutically important tetrazolo[1,5-a]pyrimidine-6-carbonitriles with good to excellent yields in short reaction time.

scholarly journals Highly Sensitive Fluorescent Detection of Acetylcholine Based on the Enhanced Peroxidase-Like Activity of Histidine Coated Magnetic Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1207
Author(s):  
Hong Jae Cheon ◽  
Quynh Huong Nguyen ◽  
Moon Il Kim
Keyword(s):  
Magnetic Nanoparticles ◽  
High Sensitivity ◽  
High Specificity ◽  
Choline Oxidase ◽  
Fluorescent Detection ◽  
One Pot ◽  
Site Structure ◽  
Specificity And Sensitivity ◽  
Highly Sensitive ◽  
Peroxidase Mimics

Inspired by the active site structure of natural horseradish peroxidase having iron as a pivotal element with coordinated histidine residues, we have developed histidine coated magnetic nanoparticles (His@MNPs) with relatively uniform and small sizes (less than 10 nm) through one-pot heat treatment. In comparison to pristine MNPs and other amino acid coated MNPs, His@MNPs exhibited a considerably enhanced peroxidase-imitating activity, approaching 10-fold higher in catalytic reactions. With the high activity, His@MNPs then were exploited to detect the important neurotransmitter acetylcholine. By coupling choline oxidase and acetylcholine esterase with His@MNPs as peroxidase mimics, target choline and acetylcholine were successfully detected via fluorescent mode with high specificity and sensitivity with the limits of detection down to 200 and 100 nM, respectively. The diagnostic capability of the method is demonstrated by analyzing acetylcholine in human blood serum. This study thus demonstrates the potential of utilizing His@MNPs as peroxidase-mimicking nanozymes for detecting important biological and clinical targets with high sensitivity and reliability.

scholarly journals Magnetization of graphene oxide nanosheets using nickel magnetic nanoparticles as a novel support for the fabrication of copper as a practical, selective, and reusable nanocatalyst in C–C and C–O coupling reactions

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 25867-25879
Author(s):  
Parisa Moradi ◽  
Maryam Hajjami
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
Coupling Reactions ◽  
Graphene Oxide Nanosheets ◽  
Magnetic Graphene Oxide ◽  
Diaryl Ethers ◽  
Magnetic Graphene

Catalytic activity of supported copper on magnetic graphene oxide was investigated as a selective and reusable nanocatalyst in the synthesis of diaryl ethers and biphenyls.

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