Effect of calcination and structural additives on EPR spectra of nanocrystalline cobalt oxides

• Autorzy: Guskos N. , Typek J. , Maryniak M. , Żołnierkiewicz G. , Podsiadły M. , Arabczyk W. , Lendzion-Bieluń Z. , Narkiewicz U.
• Konferencja: 8th International Conference on Intermolecular and Magnetic Interaction in Matter, Nałeczów 8-10 September 2005
• Języki publikacji: EN

Abstrakty

EN

Samples of nanocrystalline Co3O4 were prepared at various calcination temperatures and with various amounts of structural additives (CaO and Al2O3). The samples were characterized by X-ray diffraction. The average size and size distribution of nanoparticles have been calculated. Electron paramagnetic resonance (EPR) spectra of the samples were recorded at room temperature. The spectra have been attributed to divalent cobalt ions. Samples calcinated at higher temperatures showed an almost symmetrical, intensive EPR line. Temperature of calcination determined the character of the EPR spectra. The intensities of EPR spectra depended on the presence of CaO and Al2O3 additives

Słowa kluczowe

EN

EPR; cobalt oxide

PL

elektronowy rezonans paramagnetyczny; tlenek kobaltu

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 4
• Strony: 1095--1102
• Opis fizyczny: Bibliogr. 27 poz.

Twórcy

autor

Guskos N.

autor

Typek J.

autor

Maryniak M.

autor

Żołnierkiewicz G.

autor

Podsiadły M.

autor

Arabczyk W.

autor

Lendzion-Bieluń Z.

autor

Narkiewicz U.

• Solid State Physics, Department of Physics, University of Athens, Panepistimiopolis, 157 84 Zografos, Greece,

Bibliografia

• [1] JANSSON J., PALMQVIST A.E.C., FRIDELL E., SKOGLUNDH M., OSTERLUND L., THORMAHLEN P., LANGER V., J. Catal., 211 (2002), 387.
• [2] QINGWEN L., GUOAN L., YOUQIN S., Anal. Chim. Acta, 409 (2000), 137.
• [3] YANG H., HU Y., ZHANG X., QIU G., Mater. Lett., 58 (2004), 387.
• [4] HAYASHI E., IWAMATSU E., BISWAS M.E., SANADA Y., AHMED S., HAMID H., YONEDA T., Appl. Catal. A, 179 (1999), 203.
• [5] MORALES U., CAMPERO A., SOLORZA-FERIA O., J. New Mat. Electr. Systems, 2 (1999), 89.
• [6] MAKHLOUF S.A., J. Magn. Magn. Mater., 246 (2002), 184.
• [7] SVEGL F., OREL B., GRABEC-SVEGL I., KAUCIC V., Electrochim. Acta, 45 (2000), 4359.
• [8] BARRERA E.C., VIVEROS T.G., MORALES U., Renew. Energy, 9 (1996), 736.
• [9] NI Y., GE X., ZHANG Z., LIU H., ZHU Z., YE Q., Mat. Res. Bull., 36 (2001), 2383.
• [10] ARDIZZONE S., SPINOLO G., TRASATTI S., Electrochim. Acta, 40 (1995), 2683.
• [11] FURLANETTO G., FORMARO L., J. Colloid Interface Sci., 170 (1995), 169.
• [12] SATO M., HARA H., KURITANI H., NISHIDE T., Sol. Energy Mater. Sol. Cells, 45 (1997), 43.
• [13] VERELST M., ELY T.O., AMIENS C., SNOECK E.,. LECANTE E., MOSSET A., RESPAUD M., BROTO J.M., CHAUDRET B., Chem. Mater., 11 (1999), 2702.
• [14] GAUTIER J.L., RIOS E., GRACIA M., MARCO J.F., GANCEDO J.R., Thin Solid Films, 311 (1997), 51.
• [15] VIJAYA KUMAR R., DIAMANT Y., GEDANKEN A., Chem. Mater., 12 (2000), 2301.
• [16] KOSHIZAKI N., NARAZAKI A., SASAKI T., Scripta Mater., 44 (2001), 1925.
• [17] WILL G., MASCIONANI N., PARRISH W., HART M., J. Appl. Cryst., 20 (1987), 394.
• [18] SMITH W.L., HOBSON A.D., Acta Cryst. B, 29 (1973), 362.
• [19] MARCUS-SAUBAT B., BEAUFILS J.P., BARBAUX Y., J. Chim. Phys., 83 (1986), 317.
• [20] BELOVA J.D., ZAV’YALOV S.A., ROGINSKAYA Y.E., Russian J. Phys. Chem., 60 (1986), 140.
• [21] STOYANOVA R., ZHECHEVA E., ANGELOV S., Mat. Chem. Phys., 26 (1990), 239.
• [22] ANGELOV S., ZHECHEVA E., STOYANOVA R., ATANASOV M., J. Phys. Chem., Solids, 51 (1990), 1157.
• [23] BRABERS V.A.M., BROEMME A.D.D, J. Magn. Magn. Mater., 104–107 (1992), 405.
• [24] PIELASZEK R., J. Alloys Comp., 382 (2004), 128.
• [25] PIELASZEK R., Ph. D. thesis, Faculty of Physics, Warsaw University, 2003.
• [26] VAN VLECK J.H., Phys. Rev., 74 (1948), 1168.
• [27] ANDERSON P.W., WEISS P.R., Rev. Mod. Phys., 25 (1953), 269.