Michael Addition of 1,3-Dicarbonyl Derivatives in the Presence of Zeolite Y as an Heterogeneous Catalyst

Mekki, Amel; Benmaati, Aouicha; Mokhtar, Adel; Hachemaoui, Mohammed; Zaoui, Farouk; Zahmani, Hadjira Habib; Sassi, Mohamed; Hacini, Salih; Boukoussa, Bouhadjar

doi:10.1007/s10904-019-01424-5

Cited by 29 publications

(5 citation statements)

References 55 publications

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“…For this, a nitrogen adsorption study was carried out where pore size distribution was estimated using the DFT method, which is shown in the inset of Figure S4 . It is evident that nanozeolites preserved their porous structure and exhibited pore distribution and adsorption isotherm matching with the previous reports [ 36 , 49 , 50 ]. Finally, to identify any crystal changes during nanozeolite formation, XRD patterns were also compared with the parent zeolite, as shown in Figure S4 .…”

Section: Resultssupporting

confidence: 89%

Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance

et al. 2022

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Thin-film composite (TFC) structure has been widely employed in polymeric membrane fabrication to achieve superior performance for desalination and water treatment. In particular, TFC membranes with a thin active polyamide (PA) selective layer are proven to offer improved permeability without compromising salt rejection. Several modifications to TFCs have been proposed over the years to enhance their performance by altering the selective, intermediate, or support layer. This study proposes the modification of the membrane support using nanozeolites prepared by a unique ball milling technique for tailoring the nanofiltration performance. TFC membranes were fabricated by the interfacial polymerization of Piperazine (PIP) and 1,3,5-Benzenetricarbonyl trichloride (TMC) on Polysulfone (PSf) supports modified with nanozeolites. The nanozeolite concentration in the casting solution varied from 0 to 0.2%. Supports prepared with different nanozeolite concentrations resulted in varied hydrophilicity, porosity, and permeability. Results showed that optimum membrane performance was obtained for supports modified with 0.1% nanozeolites where pure water permeance of 17.1 ± 2.1 Lm−2 h−1 bar−1 was observed with a salt rejection of 11.47%, 33.84%, 94%, and 95.1% for NaCl, MgCl2, MgSO4, and Na2SO4 respectively.

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Section: Resultssupporting

confidence: 89%

Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance

et al. 2022

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“…Apart from the peaks of Ni(OH) 2 and SnO 2 , all other crystalline peaks were from the zeolite-Y support. For example, the sharp signals at 2θ of 15.5, 18.6, 20.35, and 23.62° were for the (331), (333), (440), and (533) crystalline planes of zeolite-Y, respectively, Figure a,b . In the Fourier transform infrared (FTIR) spectrum of SnO 2 -Ni(OH) 2 -Y and SnO 2 -Ni(OH) 2 -Y/rGO, the peaks for zeolite-Y were well retained with the slight change around 3443 cm –1 .…”

Section: Resultsmentioning

confidence: 99%

Ni(OH)₂-SnO₂ at the Hybrid Interface of Zeolite-Y and rGO for Electrochemical Oxidation of Methanol and Ethanol

et al. 2023

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Nickel hydroxide (Ni(OH)2) decorated in the framework of zeolite-Y and combined with SnO2, SnO2-Ni(OH)2-Y, was conceived as a cost-effective electrocatalyst for electrochemical oxidation of methanol and ethanol (MOR and EOR). Significant enhancement in the current density was observed in both the electrochemical oxidation processes on combining the SnO2-Ni(OH)2-Y with reduced graphene oxide (rGO). The maximum current density in the case of the MOR was found to be 2.2 Amg–1, while the same in the case of the EOR was found to be 2.0 Amg–1. The prepared electrocatalyst SnO2-Ni(OH)2-Y/rGO was found to be superior in terms of stability compared to SnO2-Ni(OH)2-Y. The current density did not drop abruptly up to 1000 cycles, implying the high stability of the material under alkaline conditions. This was further evident from the chronoamperometry measurement. The linear relationship between the current density and the square root of the scan rate also suggested that both the MOR and EOR followed the diffusion-controlled mechanism. The catalyst SnO2-Ni(OH)2-Y/rGO also exhibited good methanol and ethanol tolerance up to a maximum concentration of 6 M.

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“…The characteristics of the zeolite absorption band were observed in the area of 973.17 cm −1 (Si–O–Al), making it different from M1. 42 A silanol group (Si–OH) in the zeolite causes a shift in the FTIR spectra of the M1 membrane toward a higher wave number (Fig. 4a).…”

Section: Resultsmentioning

confidence: 99%

Low-cost membrane from polyethylene terephthalate bottle waste for water purification and chromium removal: modification and application

et al. 2023

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Michael Addition of 1,3-Dicarbonyl Derivatives in the Presence of Zeolite Y as an Heterogeneous Catalyst

Cited by 29 publications

References 55 publications

Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance

Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance

Ni(OH)₂-SnO₂ at the Hybrid Interface of Zeolite-Y and rGO for Electrochemical Oxidation of Methanol and Ethanol

Low-cost membrane from polyethylene terephthalate bottle waste for water purification and chromium removal: modification and application

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Michael Addition of 1,3-Dicarbonyl Derivatives in the Presence of Zeolite Y as an Heterogeneous Catalyst

Cited by 29 publications

References 55 publications

Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance

Fabrication of Thin Film Composite Membranes on Nanozeolite Modified Support Layer for Tailored Nanofiltration Performance

Ni(OH)2-SnO2 at the Hybrid Interface of Zeolite-Y and rGO for Electrochemical Oxidation of Methanol and Ethanol

Low-cost membrane from polyethylene terephthalate bottle waste for water purification and chromium removal: modification and application

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Product

Resources

About

Ni(OH)₂-SnO₂ at the Hybrid Interface of Zeolite-Y and rGO for Electrochemical Oxidation of Methanol and Ethanol