Designed synthesis of multifunctional Fe 3 O 4 @SiO 2 –NH 2 @CS–Co(II) towards efficient oxidation of ethylbenzene

Li, Shi; Zhai, Shangru; An, Qingda; Li, Minghui; Song, Yu; Song, Xiaowei

doi:10.1016/j.materresbull.2014.09.042

Cited by 17 publications

(3 citation statements)

References 40 publications

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“…By contrast, the lower saturation magnetization of MS-(AgC), and MS-(AgC)/Cu were related to the coating of beads with nonmagnetic compounds, which is due to a lower percentage (17.4%) of MSNPs in MS-(AgC)/Cu and surface order/disorder interaction of the magnetic spin moment. 23,24 The coercive fields are only ∼38.3 Oe for MS-(AgC)/Cu, which confirms that there is no hysteresis and also the coerecivity is close to zero. Therefore, MS-(AgC)/Cu can be separated using a permanent magnet.…”

Section: Resultsmentioning

confidence: 73%

Enhanced PMS/O₂ activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

2023

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Section: Resultsmentioning

confidence: 73%

Enhanced PMS/O₂ activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

2023

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“…Jermy et al [142] obtained 53.9% conversion and 81.3% selectivity to AP on the catalyst of highly ordered three-dimensional V-SBA-16 and a plausible reaction mechanism is shown in Figure 17. To our delight, the big breakthrough towards the oxidation of ethylbenzene using a magnetism-responsive Fe 3 O 4 @SiO 2 -NH 2 @CS-Co(II) has been reached by Zhai et al [143]. An 82.5% conversion with a relatively high selectivity of 80.4% to AP was observed in the H 2 O 2 oxidation system.…”

Section: Ethylbenzene Oxidationmentioning

confidence: 99%

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

et al. 2018

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Ordered mesoporous silicas (OMSs) attract considerable attention due to their advanced structural properties. However, for the pristine silica materials, the inert property greatly inhibits their catalytic applications. Thus, to contribute to the versatile surface of OMSs, different metal active sites, including acidic/basic sites and redox sites, have been introduced into specific locations (mesoporous channels and framework) of OMSs and the metal-functionalized ordered mesoporous silicas (MOMSs) show great potential in the catalytic applications. In this review, we first present the categories of metal active sites. Then, the synthesized processes of MOMSs are thoroughly discussed, in which the metal active sites would be introduced with the assistance of organic groups into the specific locations of OMSs. In addition, the structural morphologies of OMSs are elaborated and the catalytic applications of MOMSs in the oxidation of aromatic compounds are illustrated in detail. Finally, the prospects for the future development in this field are proposed.

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“…The magnetic separation is considered quick, simple, eco-friendly, and more effective than the traditional separation methods. This approach, of designing magnetic hybrid materials, especially core@shell structure microspheres, is widely explored in many research specializations including catalysis. − In the oxidation of EB to acetophenone, Li et al reported the coating of magnetic Fe 3 O 4 cores with amines by treatment with TEOS and APTMS. The amines group was further increased by coating of chitosan onto pro-prepared Fe 3 O 4 @SiO 2 –NH 2 .…”

Section: Eb Oxidation In Heterogeneously Catalyzed Systemsmentioning

confidence: 99%

Selective Catalytic Oxidation of Ethylbenzene to Acetophenone: A Review of Catalyst Systems and Reaction Mechanisms

Azeez,

Nafiu,

Olarewaju

et al. 2023

Ind. Eng. Chem. Res.

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Acetophenone is an important chemical intermediate often employed in the production chain of many pharmaceuticals, agrochemicals, food, and cosmetic products. It is industrially produced as a byproduct of the Hock process. However, a growing demand for acetophenone has necessitated consideration of alternative production routes. The oxidation of ethylbenzene to acetophenone (OEB-A) is one of the most considered alternatives due to the low cost and availability of ethylbenzene (EB). The EB is one of the products of refinery downstream processes that is obtained from the xylene/EB isomerization unit. Although the OEB-A reaction is considered inexpensive, it has not been of great interest due to the inert behavior of C−H bond, relatively low acetophenone selectivity, and cumbersome separation strategies for extracting acetophenone from other reaction byproducts. In this Review, we discuss the recent advances in the OEB-A reaction covering both homogeneous and heterogeneous systems. Advances in catalyst design and development including ligand design and coordination strategies and tuning of support properties have, over the years, proven to be effective in increasing acetophenone selectivity during the OEB-A process. Exploring a single-atom catalyst's definitive active centers and high atom efficiency in the OEB-A reaction has demonstrated high-throughput results, even though not well harnessed due to the challenges of controlled synthesis of single-atom metal catalyst. Solvent-free, the OEB-A reaction has demonstrated to be attractive due to its ease of product collection and environmental friendliness. Green synthesis strategies such as metal-free OEB-A reaction and CO 2 -assisted OEB-A reaction have been reviewed. The CO 2 assisted OEB-A reaction has not received the desired attention, even though considerable improvement in catalytic performance was reported. Considering the importance of carbon circular economy and the ready availability of CO 2 , the CO 2 assisted OEB-A reaction could be an interesting research focus in the near future.

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Designed synthesis of multifunctional Fe 3 O 4 @SiO 2 –NH 2 @CS–Co(II) towards efficient oxidation of ethylbenzene

Cited by 17 publications

References 40 publications

Enhanced PMS/O₂ activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

Enhanced PMS/O₂ activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

Selective Catalytic Oxidation of Ethylbenzene to Acetophenone: A Review of Catalyst Systems and Reaction Mechanisms

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Designed synthesis of multifunctional Fe 3 O 4 @SiO 2 –NH 2 @CS–Co(II) towards efficient oxidation of ethylbenzene

Cited by 17 publications

References 40 publications

Enhanced PMS/O2 activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

Enhanced PMS/O2 activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

Selective Catalytic Oxidation of Ethylbenzene to Acetophenone: A Review of Catalyst Systems and Reaction Mechanisms

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Enhanced PMS/O₂ activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene

Enhanced PMS/O₂ activation by self-crosslinked amine-gluteraldehyde/chitosan-Cu biocomposites for efficient degradation of HEPES as biological pollutants and selective allylic oxidation of cyclohexene