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RESEARCH PRODUCT
γ-Fe2O3 nanoparticle in NaY-zeolite matrix: Preparation, characterization, and heterogeneous catalytic epoxidation of olefins
Ashis BhattacharjeePhilipp GütlichBuddhadeb DuttaSreyashi JanaSubratanath KonerSeiichiro Iijimasubject
OxideIron oxideMaghemiteEpoxideengineering.materialPhotochemistryCatalysislaw.inventionStyreneInorganic Chemistrychemistry.chemical_compoundchemistrylawPolymer chemistryMaterials ChemistryengineeringCalcinationPhysical and Theoretical ChemistryZeolitedescription
Abstract Nano-sized crystals of maghemite iron oxide (γ-Fe 2 O 3 ) were synthesized onto the surface of NaY-zeolite crystals by immobilizing a polynuclear iron complex [Fe 4 O 2 (O 2 CCH 3 ) 7 (bpy) 2 ](ClO 4 ) (bpy = 2,2′-bipyridine) and subsequent calcination of the material in oxygen. Superparamagnetic γ-Fe 2 O 3 particles with sizes ∼5 nm were formed on the surface of the zeolite matrix. The nano-composite, γ-Fe 2 O 3 @NaY has been subsequently subjected for thorough characterization with several spectroscopic techniques as well as magnetic and transmission electron microscopic measurements. This confirms the formation of maghemite nanoparticles on a NaY-zeolite surface. γ-Fe 2 O 3 @NaY shows a remarkable catalytic efficiency in epoxidation reactions with various olefins using tert -BuOOH as oxidant. Notably, styrene shows a remarkable high conversion (90%) as well as epoxide selectivity (95%) while trans -stilbene is completely converted to its oxide with tert -BuOOH over a γ-Fe 2 O 3 @NaY catalyst.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-03-01 | Inorganica Chimica Acta |