Copper-manganese-zinc spinels in zeolites : study of EMR spectra

• Autorzy: Decyk P. , Więckowski A. B. , Najder-Kozdrowska L. , Bilkova I.

Identyfikatory

DOI

10.1515/nuka-2015-0075

• Konferencja: III Electron Magnetic Resonance Forum EMR-PL (3 ; 23-25.05.2014 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

The aim of this study is the application of electron magnetic resonance (EMR) spectroscopy to determine the interactions between NaY and HY zeolites and Cu-Mn-Zn spinels loaded onto the zeolite surfaces. The materials were characterized using XRD and IR spectroscopies. Four types of EMR lines were observed for Cu-Mn-Zn/NaY, Cu-Mn-Zn/HY samples. The difference between the EMR spectra recorded at 77 and 293 K has been shown. The spectra recorded at 77 K allowed us to distinguish between the species formed on NaY and HY zeolites. The EMR spectrum of Cu-Mn-Zn/NaY recorded at 77 K showed only one line attributed to antiferromagnetic spinels Cu1.4Mn1.6O4 and ZnMn2O4 or/and Cu0.5Zn0.5Mn2O4. The spinels appeared to be more stable (more strongly attached) on HY zeolite than on NaY one. It was proved that different strength of interactions between the zeolites and Cu-Mn-Zn spinels was caused by differences in the acidity of NaY and HY zeolites.

Słowa kluczowe

EN

Cu-Mn-Zn spinels; electron magnetic resonance; paramagnetic complexes; Y zeolites

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2015
• Tom: Vol. 60, No. 3, part 1
• Strony: 423--428
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Decyk P.

• Faculty of Chemistry, Adam Mickiewicz University, 6 Grunwaldzka Str., 60-780 Poznań, Poland

autor

Więckowski A. B.

• Institute of Physics, Faculty of Physics and Astronomy, University of Zielona Góra, 4a Szafrana Str., 65-516 Zielona Góra, Poland
• Institute of Molecular Physics of the Polish Academy of Sciences, 17 Smoluchowskiego Str., 60-179 Poznań, Poland, Tel.: [phone]

autor

Najder-Kozdrowska L.

• Institute of Physics, Faculty of Physics and Astronomy, University of Zielona Góra, 4a Szafrana Str., 65-516 Zielona Góra, Poland

autor

Bilkova I.

• Faculty of Chemistry, Adam Mickiewicz University, 6 Grunwaldzka Str., 60-780 Poznań, Poland

Bibliografia

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