PL EN


Preferences help
enabled [disable] Abstract
Number of results
Journal
2015 | 60 | 3 | 423-428
Article title

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

Content
Title variants
Languages of publication
EN
Abstracts
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.
Publisher
Journal
Year
Volume
60
Issue
3
Pages
423-428
Physical description
Dates
published
1 - 7 - 2015
accepted
30 - 1 - 2015
online
6 - 8 - 2015
received
9 - 10 - 2014
References
  • 1. Fierro, G., Morpurgo, S., Lo Jacono, M., Inversi, M., & Pettiti, I. (1998). Preparation, characterisation and catalytic activity of Cu-Zn-based manganites obtained from carbonate precursors. Appl. Catal. A-Gen., 166(2), 407–417. DOI: 10.1016/S0926-860X(97)00283-4.[Crossref]
  • 2. Fei, J. H., Yang, M. X., Hou, Z. Y., & Zheng, X. M. (2004). Effect of the addition of manganese and zinc on the properties of copper-based catalyst for the synthesis of syngas to dimethyl ether. Energy Fuels, 18(5), 1584–1587. DOI: 10.1021/ef049961f.[Crossref]
  • 3. Fei, J. H., Hou, Z. Y., Zhu, B., Lou, H., & Zheng, X. M. (2006). Synthesis of dimethyl ether (DME) on modified HY zeolite and modified HY zeolite-supported Cu-Mn-Zn catalysts. Appl. Catal. A-Gen., 304, 49–54. DOI: 10.1016/j.apcata.2006.02.019.[Crossref]
  • 4. Padlyak, B. V., Wojtowicz, W., Adamiv, V. T., Burak, Ya. V., & Teslyuk, I. M. (2010). EPR spectroscopy of the Mn2+ and Cu2+ centres on lithium and potassium-lithium tetraborate glasses. Acta Phys. Pol. A, 117(1), 122–125.
  • 5. Guskos, N., Glenis, S., Typek, J., Żołnierkiewicz, G., Berczyński, P., Wardal, K., Guskos, A., Sibera, D., Moszyński, D., Łojkowski, W., & Narkiewicz, U. (2012). Magnetic properties of ZnFe2O4 nanoparticles. Cent. Eur. J. Phys. 10(2), 470–477. DOI: 10.2478/s11534-012-0013-3.[Crossref]
  • 6. Zapotoczny, B., Dudek, M. R., Guskos, N., Kozioł, J. J., Padlyak, B. V., Kośmider, M., & Rysiakiewicz-Pasek, E. (2012). FMR study of the porous silicate glasses with Fe3O4 magnetic nanoparticles fillers. J. Nanomater., 2012, article ID 341073(7pp.). DOI: 10.1155/2012/341073.[Crossref][WoS]
  • 7. Jiang, M., & Karge, H. G. (1995). FTIR study of the kinetics of solid-state ion exchange in zeolites using pyridine as a probe. J. Chem. Soc. Faraday Trans., 91(12), 1845–1851. DOI: 10.1039/ft9959101845.[Crossref]
  • 8. Karge, H. G., Hunger, M., & Beyer, H. K. (1999). Characterization of zeolites – infrared and nuclear magnetic resonance spectroscopy and X-ray diffraction. In J. Weitkamp & L. Puppe (Eds.), Catalysis and zeolites: Fundamentals and applications (pp. 198–326). Berlin: Springer-Verlag.
  • 9. Goslar, J., & Więckowski, A. B. (1985). Migration and structure of aqueous Cu2+ complexes in Faujasite. J. Solid State Chem., 56(1), 101–115. DOI: 10.1016/0022-4596(85)90257-9.[Crossref]
  • 10. Bleaney, B., & Rubins, R. S. (1961). Explanation of some ‘forbidden’ transitions in paramagnetic resonance. Proc. Phys. Soc., 77(1), 103–112. DOI: 10.1088/0370-1328/77/1/312.[Crossref]
  • 11. Lender, Z., Goldfarb, D., & Batista, J. (1993). Magnetic resonance studies of SAPO-44 and MnAPSO-44. J. Am. Chem. Soc., 115(3), 1106–1114. DOI: 10.1021/ja00056a040.[Crossref]
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.-psjd-doi-10_1515_nuka-2015-0075
Identifiers
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.