Liquid phase oxidation of cyclohexane over mesoporous cobalt silicates molecular sieves synthesized in strong acidic media by assembly of preformed CoS-1 precursors with triblock copolymer

Ziouèche, A.; Chérif-Aouali, L.; Bengueddach, Abdelkader

doi:10.1007/s10934-018-0659-3

Cited by 7 publications

(5 citation statements)

References 48 publications

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“…to con rm the absence of any oxidation products. To obtain a 1:3 molar ratio of cyclohexane to anhydrous TBHP system, a solution of TBHP in cyclohexane was prepared according to the previously reported procedure [22].…”

Section: Methodsmentioning

confidence: 99%

Coherent design of chromium oxide nanoparticles immobilized on layered double hydroxide as competent nanocatalyst for the oxidation of cyclohexane to KA oil

Kirar

2024

Preprint

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Transition metals are commonly used in the oxidation of cyclohexane, but their robust reaction conditions and lack of efficiency make further use challenging. This work aimed to improve the efficiency of the reaction further, a heterogeneous catalyst for the oxidation of cyclohexane was developed using chromium oxide nanoparticles immobilized on layered double hydroxide (Cr2O3/LDH). Various spectroscopy methods were used to identify the synthesized catalysts. The synthesized Cr2O3/LDH nanocatalyst was used for the selective oxidation of cyclohexane in the liquid phase without solvent. The structural characterization showed that the Cr2O3-NPs were well anchored on the LDH layers, resulting in a fine dispersion. The Cr2O3/LDH hybrid significantly increased conversion and selectivity, achieving a maximum conversion of 34.73% cyclohexane and 97.85% selectivity to K/A oil. The leaching experiment revealed that the Cr2O3/LDH exhibited the properties of a heterogeneous nanocatalyst, which could be reused for at least six cycles without affecting its catalytic efficiency.

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Section: Methodsmentioning

confidence: 99%

Coherent design of chromium oxide nanoparticles immobilized on layered double hydroxide as competent nanocatalyst for the oxidation of cyclohexane to KA oil

Kirar

2024

Preprint

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“…Over the past two decades, the development of mesoporous materials has been a popular area of research due to their large surface area, high pore volume, and welldefined pore sizes [3,4] and ease of chemical modification [5,6]. The catalytic properties have been explored after doping transition metals [7][8][9][10][11][12][13] in silica frameworks to obtain metal silicates. The insertion of alkaline earth metals, including magnesium, into a silica framework can increase the surface basicity of the framework, opening up many applications for the material.…”

Section: Introductionmentioning

confidence: 99%

One‐pot green synthesis, study of fluorescence properties, and biological activity of pyrano[3,2‐c]chromenes derivatives via mesoporous materials MgO/SBA‐15

Chelihi,

Hassaine,

Nachat

et al. 2023

Journal of Heterocyclic Chem

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This current work describes the preparation of MgO‐SBA‐15 catalysts by ultrasonic method, and it is characterized by the different analysis techniques of XRD, BET, SEM, and IRTF. In order to find out an application for this mesoporous material, MgO/SBA‐15 was used as a heterogeneous catalyst in the one‐pot synthesis of pyrano[3,2‐c]chromenes derivatives isolated at room temperature reaction according to green chemistry criteria. To enhance these derivatives, a spectroscopic study of molecular fluorescence properties was carried out as well as an identification analysis by nuclear magnetic resonance and FTIR was used. Furthermore, biological activity experiment is also carried out, from where the obtained test results were satisfactory for AC09, AC05, and AC10 compounds and they are checked after computation by molecular modeling.

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“…The results show that when water-free TBHP is employed, the catalysts become more active. 13 Particle size plays a key role in catalytic reactions because the catalytic reaction takes place on the metal surface of the catalyst, and it is reasonable to assume that smaller metal particles have more surface area and hence more activity. The immobilization of nanoparticles on the surface of insoluble inorganic supports has attracted a lot of interest.…”

Section: Introductionmentioning

confidence: 99%

“…Heterogeneous catalysts have evident benefits in terms of easier catalyst separation from the reactant, recycling, and better at meeting the demands of sustainable chemistry. ,, Therefore, several researchers have worked hard to design a suitable heterogeneous catalytic system for the oxidation of cyclohexane. Several catalytic systems have lately been investigated, with transition metal catalysts getting the most attention. − Han et al described the fabrication of transition metal oxide/graphene composites as heterogeneous catalysts for cyclohexane oxidation. Under optimal conditions, a maximum of 34.4% conversion of cyclohexane with 74.4% selectivity of KA oil was achieved after 6 h over the CoO/graphene catalyst .…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and Characterization of Cu Nanoparticles Dispersed on ZnAl-Layered Double Hydroxide Nanocatalysts for the Oxidation of Cyclohexane

Kirar¹,

Gupta²,

Chandra

et al. 2022

ACS Omega

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In the chemical industry, designing high-performance catalysts for the oxidation of cyclohexane into value-added products such as cyclohexanol and cyclohexanone (the combination is known as KA oil) is critical. The catalytic activity of copper nanoparticles supported on layered double hydroxide (LDH) for the liquid phase oxidation of cyclohexane was examined in this study. In this work, we have developed Cu nanoparticles supported on layered double hydroxide nanocatalysts, abbreviated as CuNPs@LDH, by the chemical reduction approach. Various physical methods were used to characterize the resulting material, including ICP-AES, XRD, FTIR, SEM, EDX, HRTEM, and BET surface area. The catalytic activity of copper nanoparticles supported on LDH was examined for the liquid phase oxidation of cyclohexane with tert-butyl hydroperoxide. CuNPs@ LDH nanocatalysts with an excellent 52.3% conversion of cyclohexane with 97.2% selectivity of KA oil was obtained after 6 h at 353 K. The hot filtration test further indicated that CuNPs@LDH was a heterogeneous catalyst that could be recycled at least six times without suffering a substantial reduction in its catalytic activity.

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Liquid phase oxidation of cyclohexane over mesoporous cobalt silicates molecular sieves synthesized in strong acidic media by assembly of preformed CoS-1 precursors with triblock copolymer

Cited by 7 publications

References 48 publications

Coherent design of chromium oxide nanoparticles immobilized on layered double hydroxide as competent nanocatalyst for the oxidation of cyclohexane to KA oil

Coherent design of chromium oxide nanoparticles immobilized on layered double hydroxide as competent nanocatalyst for the oxidation of cyclohexane to KA oil

One‐pot green synthesis, study of fluorescence properties, and biological activity of pyrano[3,2‐c]chromenes derivatives via mesoporous materials MgO/SBA‐15

Fabrication and Characterization of Cu Nanoparticles Dispersed on ZnAl-Layered Double Hydroxide Nanocatalysts for the Oxidation of Cyclohexane

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