2023年10月1日 · 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 …

2023年2月1日 · Herein, a novel strategy for the synthesis of hierarchical ZSM-5 zeolite with fixed extra-small Fe-oxide nanoparticles is reported. We intimately bring together redox oxide and acid functions, by creating a composite and adding functionalized (compatibilized) Fe 3 O 4 nanoparticles early on in the synthesis of zeolite.

2017年1月24日 · 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.

2022年5月1日 · 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.

5 天之前 · 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 ...

2020年6月16日 · 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 …

2021年1月11日 · 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.

2013年7月2日 · 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 2 O 2 as green oxidant. Previously, we have observed that Fe species alone are capable of catalyzing this highly selective transformation.

2021年7月31日 · 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 ...

2013年7月19日 · 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.