Oct 1, 2023 · In this work, we reported the encapsulation of copper oxide into the Fe-MFI zeolite to synthesize CuO@Fe-MFI through one-step hydrothermal synthesis and its excellent catalytic activity as well as re-usability in tetracycline degradation in comparison to CuO/Fe-MFI zeolite.

Jan 24, 2017 · The catalytic performance of the nano-sized Fe-MFI in methanol to olefin (MTO) reactions was investigated. The Fe-MFI catalysts showed higher propylene to ethylene (P/E) ratios and lower light paraffin yields compared with MFI type aluminosilicate zeolites (Al-MFI) for both the synthesis methods.

May 1, 2022 · We report Fe-demetallation of Fe-MFI framework. Above 800 °C framework Fe 3+ is reduced to Fe 0 forming nanoparticles. Second metal is introduced by copper ion exchange. Reduction of ion-exchanged Cu/Fe-MFI yields bimetallic nanoparticles. Resulted Fe@MFI and CuFe@MFI are active in p-nitrotoluene hydrogenation.

Jan 11, 2021 · Hierarchical Fe-MFI were synthesized by post-treatment with TPAOH and applied as catalysts in liquid phase dehydration of 1-phenylethanol. The catalysts were characterized by XRD, TEM and N2 physisorption et al. After treatment, more ferric ions occupied zeolite framework sites, leading to increase in Brønsted acid sites content.

Jun 16, 2020 · Fe single atomic sites in the MFI framework have been imaged for the first time. The approach presented here, combining image analysis, electron diffraction, and DFT calculations, can provide essential structural keys for tuning catalytically active sites …

Mar 19, 2025 · The Fe-MFI zeolites not only show high TOF (2.00 ~ 3.80 min-1) but also improves the selectivity of 3-pentanone and stability relative to Al-MFI with strong BAS. These results demonstrate a strategy of weakening the strength of BAS of zeolite to reduce the activity of the secondary and tertiary reactions and therefore to improve selectivity and ...

Jul 31, 2021 · Here, we successfully synthesized the hollow Fe-silicate-1 encapsulated ultra-small Fe2O3 nanoparticles (2.5 nm) with higher yield (85.2%) by mother liquid than traditional dissolution-recrystallization for the first time, which was achieved by precisely regulating the number and distribution of defects in zeolite and cleverly utilizing the ...

Dec 27, 2017 · This work focuses on the preparation of Fe-MFI zeolites by a one-step method with different iron concentrations and their characterization by different methods such as X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), nitrogen sorption measurements at 77 K, scanning and transmission electron microscopy (SEM and ...

Dec 20, 2022 · In this work, highly dispersed copper oxide on the hollow Fe-MFI zeolite CuO/FeS-1 was synthesized via an impregnation procedure and applied as heterogeneous catalyst for the tetracycline degradation.

Jul 19, 2013 · Fe- and Cu-containing zeolites have recently been shown to be efficient catalysts for the one-step selective transformation of methane into methanol in an aqueous medium at only 50 °C, using H as green oxidant. Previously, we have observed that Fe species alone are capable of catalyzing this highly selective transformation.