Highly selective epoxidation of olefins using vanadium (IV) schiff base- amine-tagged graphene oxide composite

Hassan, Hassan M.A.; Betiha, Mohamed A.; El-Sharkawy, E.A.; Elshaarawy, Reda F.M.; El-Assy, N. B.; Essawy, Amr A.; Tolba, Ahmed M.; Rabie, Abdelrahman M.

doi:10.1016/j.colsurfa.2020.124520

Cited by 47 publications

(22 citation statements)

References 55 publications

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“…The crystalline nature of prepared GO and Pd(II) Schiff-base/GO complex was investigated through the powder XRD technique. In our previous work [48], the diffraction pattern of GO showed the characteristic peak at 2θ = 11.13° with d-spacing of 0.782 nm with reference to the distinctive peak of bulk graphite at about 26° with corresponding to interlayer spacing of 0.343 nm. These results confirmed worthy exfoliation of graphite sheets and successful insertion of oxygenated functional groups between GO layers.…”

Section: Fig 2 Raman Spectra Of Go and Pd(ii) Schiff-base/go Complexmentioning

confidence: 80%

GO supported Schiff base/palladium complex: a superior catalyst for the hydrogenation of nitroarenes

Hassan

Tolba

El-Sharkawyb

2020

Frontiers in Scientific Research and Technology

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Reducing nitroarenes to the appropriate amines is a major chemical reaction in all industrial and environmental perspectives. In this work, a novel palladium (II) Schiff/base complex supported on graphene oxide (GO) was synthesized via a coordination interaction as an efficient heterogeneous catalyst. GO was functionalized with 3-aminopropyltriethoxysilane (3-APTES) by the condensation reaction, and then the imidazolium Schiff base ligand was fabricated from the reaction of 5-(1methylimidazolium)-vanillyl chloride. The synthesized materials were characterized by various techniques including Raman spectroscopy, FTIR, XRD, elementary analysis, TGA, SEM, and TEM. The as-prepared heterogeneous catalyst was applied in the catalytic reduction of nitrobenzene using NaBH4 in aqueous media. The results exhibited excellent catalytic performance and the reaction kinetics followed a pseudofirst-order with rate constant equals to 0.321 min-1. The catalyst was recovered and recycled with high durability even for four catalytic cycles. GO-supported Pd(II) Schiff / base complex is potentially appealing to heterogeneous catalysts for the hydrogenation process.

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Section: Fig 2 Raman Spectra Of Go and Pd(ii) Schiff-base/go Complexmentioning

confidence: 80%

GO supported Schiff base/palladium complex: a superior catalyst for the hydrogenation of nitroarenes

Hassan

Tolba

El-Sharkawyb

2020

Frontiers in Scientific Research and Technology

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“…Numerous studies were carried out in recent times to understand and optimize the degradation of phenol and phenolic compounds. Accordingly, Hassan et al (2020) [80] report an efficiency of 90% upon degrading phenol using acetylacetonate, rather than graphene nanocomposites, as the photocatalyst, assisted by visible light irradiation. Likewise, Tang et al (2021) [81] report 100% removal of phenol from different water sources, including sewage wastewaters, upon using a bismuth-doped TiO 2 -based photocatalyst.…”

Section: Removal Of Phenol and Phenolic Compoundsmentioning

confidence: 99%

Current Developments in the Effective Removal of Environmental Pollutants through Photocatalytic Degradation Using Nanomaterials

et al. 2022

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Photocatalysis plays a prominent role in the protection of the environment from recalcitrant pollutants by reducing hazardous wastes. Among the different methods of choice, photocatalysis mediated through nanomaterials is the most widely used and economical method for removing pollutants from wastewater. Recently, worldwide researchers focused their research on eco-friendly and sustainable environmental aspects. Wastewater contamination is one of the major threats coming from industrial processes, compared to other environmental issues. Much research is concerned with the advanced development of technology for treating wastewater discharged from various industries. Water treatment using photocatalysis is prominent because of its degradation capacity to convert pollutants into non-toxic biodegradable products. Photocatalysts are cheap, and are now emerging slowly in the research field. This review paper elaborates in detail on the metal oxides used as a nano photocatalysts in the various type of pollutant degradation. The progress of research into metal oxide nanoparticles, and their application as photocatalysts in organic pollutant degradation, were highlighted. As a final consideration, the challenges and future perspectives of photocatalysts were analyzed. The application of nano-based materials can be a new horizon in the use of photocatalysts in the near future for organic pollutant degradation.

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“…Vanadium complexes, in fact, have shown a great catalytic ability towards several selective oxidation reactions, among which are the epoxidation of alkenes [76], the oxidation of sulfides [77], the oxidative amination [78], the oxidation of alcohols to aldehydes and ketones [79], C-C bond forming reactions [80] and carboxylation [81].…”

Section: Structure and Biological Significance Of Acylpyrazolones Andmentioning

confidence: 99%

On the Capability of Oxidovanadium(IV) Derivatives to Act as All-Around Catalytic Promoters Since the Prebiotic World

Campitelli

Crucianelli

2020

Molecules

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For a long time the biological role of vanadium was not known, while now the possibility of using its derivatives as potential therapeutic agents has given rise to investigations on their probable side effects. Vanadium compounds may inhibit different biochemical processes and lead to a variety of toxic effects and serious diseases. But, on the other hand, vanadium is an essential element for life. In recent years, increasing evidence has been acquired on the possible roles of vanadium in the higher forms of life. Despite several biochemical and physiological functions that have been suggested for vanadium and notwithstanding the amount of the knowledge so far accumulated, it still does not have a clearly defined role in the higher forms of life. What functions could vanadium or its very stable oxidovanadium(IV) derivatives have had in the prebiotic world and in the origins of life? In this review, we have briefly tried to highlight the most useful aspects that can be taken into consideration to give an answer to this still unresolved question and to show the high versatility of the oxidovanadium(IV) group to act as promoter of several oxidation reactions when coordinated with a variety of ligands, including diketones like acylpyrazolones.

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Highly selective epoxidation of olefins using vanadium (IV) schiff base- amine-tagged graphene oxide composite

Cited by 47 publications

References 55 publications

GO supported Schiff base/palladium complex: a superior catalyst for the hydrogenation of nitroarenes

GO supported Schiff base/palladium complex: a superior catalyst for the hydrogenation of nitroarenes

Current Developments in the Effective Removal of Environmental Pollutants through Photocatalytic Degradation Using Nanomaterials

On the Capability of Oxidovanadium(IV) Derivatives to Act as All-Around Catalytic Promoters Since the Prebiotic World

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