Catalytic Activity of Functionalized Spinels

Kalluri, V.S. Ranganath; Shaikh, Melad; Sahu, Aanchal; Gaddipati, Sarvani

doi:10.2174/1385272821666170517144231

Cited by 11 publications

(12 citation statements)

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“…Recently, ferrites of inverse spinels and normal spinels have been extensively used in the catalysis of many important reactions including water gas shift reactions, oxidation of methanol, and several organic transformations. [50] These spinels on carbon materials have been decorated for electronics and catalysis, particularly on carbon nanotubes and graphene oxide. [49] Inverse spinels, such as CoFe 2 O 4 , Fe 3 O 4 , and normal spinels, such as ZnFe 2 O 4 , have been decorated on MWCNT, and the corresponding nanocomposite material was employed in the dehydration of fructose for the synthesis of 5‐hydroxymethyl furfural (5‐HMF).…”

Section: Transition Metal Complexes and Metal Oxides On Cntsmentioning

confidence: 99%

Recyclable catalysts for the synthesis of heterocyclic compounds using carbon materials

Rai

Ranganath

2020

Journal of Heterocyclic Chem

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Heterogeneous catalytic reactions play a major role in the industry to produce a number of compounds that are essential in our daily life. Synthesis of heterocyclic compounds using heterogeneous catalysis is one of the rapidly growing research areas. Inherent ability to produce high selectivity and potentiality to recycle, the catalyst makes the heterogeneous systems more attractive, especially on the industrial scale. Various recyclable catalytic systems have been extensively developed for the synthesis of heterocyclic compounds via dehydration, partial oxidations, three‐component couplings, dehydrogenations, and others. Different supports like polymers, metal oxides, and quite recently carbon supports like carbon nanotubes (CNTs), graphene oxide (GO), graphitic nitride (GCN), and nitrogenous carbon materials (NGr) have been widely used to synthesize diverse heterocycles. The use of GO in the synthesis of heterocyclic compounds has been reviewed recently, hence we did not focus on GO in this review. The aim of this review article is to explore the emerging areas of carbon‐based heterogeneous materials such as CNTs, GCN, and NGr in the synthesis of heterocycles. This review also focused on the most recent examples, their preparation, and recycling studies of highly excited catalytic systems used for the heterocycles.

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Section: Transition Metal Complexes and Metal Oxides On Cntsmentioning

confidence: 99%

Recyclable catalysts for the synthesis of heterocyclic compounds using carbon materials

Rai

Ranganath

2020

Journal of Heterocyclic Chem

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“…[1][2][3] ). This enables precise fine tuning of the desired functional behavior, such as the magnetic, [4][5][6] (photo-)catalytic, [7][8][9][10][11][12][13][14] or electrical [15][16][17] properties. Microscopically, such functional behavior originates from the crystal structure of metal spinel ferrites.…”

Section: Introductionmentioning

confidence: 99%

Impact of inversion and non-stoichiometry on the transport properties of mixed zinc-cobalt ferrites

et al. 2022

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“…Some advantages of this method are the relative simplicity of the process, the absence of organic solvents and the possibility of obtaining new (metastable) phases with different properties to those of the conventionally prepared materials. Due to their magnetic properties, ferrite-based materials have drawn interest for different applications, including gas sensors and catalysts [15,16] and microwave absorbers [17,18]. Amongst all the spinel ferrites, NiFe 2 O 4 has an inverse spinel structure and it is a well-known soft magnetic material, with relatively high values of saturation magnetization and low coercivity.…”

Section: Introductionmentioning

confidence: 99%

Direct Amide Synthesis over Composite Magnetic Catalysts in a Continuous Flow Reactor

Liu

Rebrov

2021

Catalysts

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Composite magnetic catalysts containing different amounts of sulfated titania (33–50 wt %) have been prepared by means of high energy ball-milling between TiO2 and NiFe2O4. The catalysts have been characterized with N2 adsorption/desorption isotherms, XRD, temperature programmed oxidation (TPO) and vibrating sample magnetometer (VSM). The catalytic activity was measured in the reaction of aniline and 4-phenylbutyric acid in the continuous mode under conventional and inductive heating. The effect of catalyst loading in the reactor on reaction and deactivation has been studied, indicating the catalyst containing 50 wt % titania gave the highest reaction rate and least deactivation. The operation in a flow reactor under inductive heating increased the amide yield by 25% as compared to conventional heating. The initial reaction rate decreased by 30% after a period of 15 h on stream. The catalyst activity was fully restored after a treatment with an air flow at 400 °C.

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Catalytic Activity of Functionalized Spinels

Cited by 11 publications

References 0 publications

Recyclable catalysts for the synthesis of heterocyclic compounds using carbon materials

Recyclable catalysts for the synthesis of heterocyclic compounds using carbon materials

Impact of inversion and non-stoichiometry on the transport properties of mixed zinc-cobalt ferrites

Direct Amide Synthesis over Composite Magnetic Catalysts in a Continuous Flow Reactor

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