Solid state synthesis and catalytic performance of pyrochlore Er2Ti2O7 in epoxidation of cyclooctene

Document Type : Original Article

Authors

Faculty of chemistry, Semnan University, Semnan, Iran

Abstract

Er2Ti2O7 pyrochlore structure was successfully prepared by solid-state method. The prepared microstructure mixed-metal oxide was characterized by XRD, SEM, EDX, FT-IR and BET. X-ray powder diffraction revealed a Cubic crystal system with Fd-3m space group for Er2Ti2O7. The morphology and mean particle size of the sample was characterized by the scanning electron microscope. The elemental analysis or chemical characterization of the sample was determined by Energy Dispersive X-ray microanalysis. The absorption bands between the A and B sites in the pyrochlore structure were confirmed by Fourier transmission infrared spectra in (400–4000 cm-1) range. The specific surface area and the pore size distributions of the sample were calculated using Brunauer–Emmett–Teller (BET) method and Barrett–Joyner–Halenda (BJH) method respectively. The complex has been used as a catalyst for epoxidation of cyclooctene with TBHP (tert-butyl hydroperoxide). Various parameters including catalyst amount, solvent type and amount, oxidant/substrate ratio and time have been optimized and almost. Considerable catalytic activity and high epoxide selectivity has been found.

Keywords

References

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Applied Chemistry Today
Volume 15, Issue 57
December 2020
Pages 11-20

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