Characterization of Fe-Oxide Species Prepared onto ZSM-5 Zeolites and Their Role in the Photocatalytic Decomposition of N2O into N2 and O2

Investigations on the effect of the local structures on Fe-ZSM-5 zeolites by means of ESR, UV–Vis absorption and XRD measurements have shown that Fe-ZSM-5 with low Si/Al ratios includes highly dispersed Fe-oxides with tetrahedral and distorted tetrahedral coordinations, while the latter species coul...

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Bibliographic Details
Published in:Chemistry letters 2000-10, Vol.29 (10), p.1160-1161
Main Authors: Higashimoto, Shinya, Nishimoto, Kazuhiko, Ono, Takehiko, Anpo, Masakazu
Format: Article
Language:English
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Summary:Investigations on the effect of the local structures on Fe-ZSM-5 zeolites by means of ESR, UV–Vis absorption and XRD measurements have shown that Fe-ZSM-5 with low Si/Al ratios includes highly dispersed Fe-oxides with tetrahedral and distorted tetrahedral coordinations, while the latter species could not be observed in Fe-ZSM-5 with high Si/Al ratios. Moreover, the photocatalytic decomposition of N2O into N2 and O2 was found to proceed on Fe-ZSM-5 having low Si/Al ratios with a good linearity against the UV-irradiation time and a good stoichiometry. It was also observed that the photocatalytic efficiency decreased when the Si/Al ratio was increased. These results clearly suggest that a highly dispersed distorted tetrahedrally coordinated Fe-oxide species plays a significant role in the photocatalytic decomposition of N2O into N2 and O2.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2000.1160