Green and highly efficient approach for the reductive coupling of nitroarenes to azoxyarenes using the new mesoporous Fe3O4@SiO2@Co–Zr–Sb catalyst

Zeynizadeh, Behzad; Gilanizadeh, Masumeh

doi:10.1007/s11164-020-04126-7

Cited by 15 publications

(10 citation statements)

References 53 publications

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“…Further these Fe 3 O 4 particles sphere size slightly increased about 34-38 nm after silica coating on the surface of the Fe 3 O 4 particles (Fig. 4b) which was comparable with previous study 26,36,37 . There was no signi cant change in the physical appearance of the nanoparticles occurred following modi cation with 16-PHDA and α-trasglucosidase enzyme.…”

Section: Fesem Characterizationsupporting

confidence: 92%

Immobilization of α-transglucosidase on silica-coated magnetic nanoparticles and its application for production of isomaltooligosaccharide from the potato peel

Maurya

Ali

Kaul

et al. 2023

Preprint

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In this study production of isomaltooligosaccharide from potato peels starch was carried out in three steps such as liquefaction, saccharification, and transglycosylation. Further, cloning α-transglucosidase gene from Aspergillus niger (GH31 family), transforming into E. coli BL21 (DE3), overexpressing and purifying the resulting protein for the production of α-transglucosidase. For improved reusability, the generated α-transglucosidase was then bound with magnetic nanoparticles (6 cycles). All the modifications were characterized using the following methods: Fourier transform infra-red (FT-IR) analysis, Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX) spectroscopy, X-Ray Diffraction Spectroscopy (XRD), and Thermogravimetric Analysis (TGA). Further The optimum conditions for transglycosylation were determined by RSM as follows: enzyme to substrate ratio 6.9 U/g, reaction time 9 h, temperature 45°C, and pH 5.5 with yield of 70 g/l (±2.1). MALDI-TOF-MS analysis showed DP of the IMOs in ranges of 2-10. The detailed structural characterization of isomaltooligosaccharide by GC-MS and NMR suggested the α-(1→4) and α-(1→6)-D-Glcp residues as major constituents along with minor α-(1→2) and α-(1→3)-D-Glcp residues.

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Section: Fesem Characterizationsupporting

confidence: 92%

Immobilization of α-transglucosidase on silica-coated magnetic nanoparticles and its application for production of isomaltooligosaccharide from the potato peel

Maurya

Ali

Kaul

et al. 2023

Preprint

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“…It is important to mention that core/shell magnetic structures are developed to combine the advantages of the two layers; the magnetic one is responsible for the magnetic properties, while the shell ensures greater stability and can also bring new features. Besides the benefits of the core/shell nanostructures, more complex nanostructures with two or more shells are developed [73][74][75].…”

Section: Synthesis Of Magnetite-silica Core/shell Structuresmentioning

confidence: 99%

“…Table 1 describes various core@shell nanoparticles, their synthesis methods, and their application. A three-step method was applied involving the synthesis of magnetite, followed by coating with mesoporous silica, and finally, Co-Zr-Sb trimetallic growth on the surface -These core@shell@shell structures are exploited as a catalyst in the reduction of nitroarenes to azoxy arenes [74] Fe 3 O 4 @SiO 2 @Au@ Porous SiO 2 Structure Magnetite NPs SiO 2 @Au@porous SiO 2 Fe 3 O 4 @SiO 2 @Au@porous SiO 2 can be obtained by a step-by-step approach, starting from magnetite, followed by coating with a SiO 2 layer and adsorbing Au onto the surface. After an Au adsorption, an additional 20 nm SiO 2 layer is deposited and etched to control the degradation of SiO 2 in NaOH.…”

Section: Synthesis Of Magnetite-silica Core/shell Structuresmentioning

confidence: 99%

Magnetite-Silica Core/Shell Nanostructures: From Surface Functionalization towards Biomedical Applications—A Review

et al. 2021

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The interconnection of nanotechnology and medicine could lead to improved materials, offering a better quality of life and new opportunities for biomedical applications, moving from research to clinical applications. Magnetite nanoparticles are interesting magnetic nanomaterials because of the property-depending methods chosen for their synthesis. Magnetite nanoparticles can be coated with various materials, resulting in “core/shell” magnetic structures with tunable properties. To synthesize promising materials with promising implications for biomedical applications, the researchers functionalized magnetite nanoparticles with silica and, thanks to the presence of silanol groups, the functionality, biocompatibility, and hydrophilicity were improved. This review highlights the most important synthesis methods for silica-coated with magnetite nanoparticles. From the presented methods, the most used was the Stöber method; there are also other syntheses presented in the review, such as co-precipitation, sol-gel, thermal decomposition, and the hydrothermal method. The second part of the review presents the main applications of magnetite-silica core/shell nanostructures. Magnetite-silica core/shell nanostructures have promising biomedical applications in magnetic resonance imaging (MRI) as a contrast agent, hyperthermia, drug delivery systems, and selective cancer therapy but also in developing magnetic micro devices.

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“…A recyclable nanocatalyst, Fe 3 O 4 @SiO 2 @Co-Zr-Sb, was employed in an efficient, facile, and environmentally friendly method for the direct reduction of nitroaromatics to the corresponding azoaromatics [ 64 ]. The chemical selective hydrogenation of nitrobenzene was carried out in refluxing water to obtain ethoxybenzene (approximately 2–10 min with high yield).…”

Section: Applications Of Trimetallic Npsmentioning

confidence: 99%

“…In addition, the catalyst was employed continuously four times with no significant activity failure. Some notable features comprise short reaction time, elevated yields, no harmful organic solvents, mild reaction conditions, with the utilization of recyclable nano-magnetic catalysts and deployment of water as a green solvent [ 64 ].…”

Section: Applications Of Trimetallic Npsmentioning

confidence: 99%

Trimetallic Nanoparticles: Greener Synthesis and Their Applications

et al. 2020

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Nanoparticles (NPs) and multifunctional nano-sized materials have significant applications in diverse fields, namely catalysis, sensors, optics, solar energy conversion, cancer therapy/diagnosis, and bioimaging. Trimetallic NPs have found unique catalytic, active food packaging, biomedical, antimicrobial, and sensing applications; they preserve an ever-superior level of catalytic activities and selectivity compared to monometallic and bimetallic nanomaterials. Due to these important applications, a variety of preparation routes, including hydrothermal, microemulsion, selective catalytic reduction, co-precipitation, and microwave-assisted methodologies have been reported for the syntheses of these nanomaterials. As the fabrication of nanomaterials using physicochemical methods often have hazardous and toxic impacts on the environment, there is a vital need to design innovative and well-organized eco-friendly, sustainable, and greener synthetic protocols for their assembly, by applying safer, renewable, and inexpensive materials. In this review, noteworthy recent advancements relating to the applications of trimetallic NPs and nanocomposites comprising these NPs are underscored as well as their eco-friendly and sustainable synthetic preparative options.

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Green and highly efficient approach for the reductive coupling of nitroarenes to azoxyarenes using the new mesoporous Fe3O4@SiO2@Co–Zr–Sb catalyst

Cited by 15 publications

References 53 publications

Immobilization of α-transglucosidase on silica-coated magnetic nanoparticles and its application for production of isomaltooligosaccharide from the potato peel

Immobilization of α-transglucosidase on silica-coated magnetic nanoparticles and its application for production of isomaltooligosaccharide from the potato peel

Magnetite-Silica Core/Shell Nanostructures: From Surface Functionalization towards Biomedical Applications—A Review

Trimetallic Nanoparticles: Greener Synthesis and Their Applications

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