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Izvorni znanstveni članak
https://doi.org/10.5562/cca2611

Preparation and Spectroscopic Characterization of Iron Doped Mullite

Iva Buljan ; Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
Károly Lázár ; Centre for Energy Research, P.O.B. 49, H-1525 Budapest, Hungary
Cleo Kosanović ; Meteorological and Hydrological Service, Grič 3, 10000 Zagreb, Croatia

Puni tekst: engleski, pdf (15 MB) str. 171-178 preuzimanja: 599* citiraj
APA 6th Edition
Buljan, I., Lázár, K. i Kosanović, C. (2015). Preparation and Spectroscopic Characterization of Iron Doped Mullite. Croatica Chemica Acta, 88 (2), 171-178. https://doi.org/10.5562/cca2611
MLA 8th Edition
Buljan, Iva, et al. "Preparation and Spectroscopic Characterization of Iron Doped Mullite." Croatica Chemica Acta, vol. 88, br. 2, 2015, str. 171-178. https://doi.org/10.5562/cca2611. Citirano 28.03.2020.
Chicago 17th Edition
Buljan, Iva, Károly Lázár i Cleo Kosanović. "Preparation and Spectroscopic Characterization of Iron Doped Mullite." Croatica Chemica Acta 88, br. 2 (2015): 171-178. https://doi.org/10.5562/cca2611
Harvard
Buljan, I., Lázár, K., i Kosanović, C. (2015). 'Preparation and Spectroscopic Characterization of Iron Doped Mullite', Croatica Chemica Acta, 88(2), str. 171-178. https://doi.org/10.5562/cca2611
Vancouver
Buljan I, Lázár K, Kosanović C. Preparation and Spectroscopic Characterization of Iron Doped Mullite. Croatica Chemica Acta [Internet]. 2015 [pristupljeno 28.03.2020.];88(2):171-178. https://doi.org/10.5562/cca2611
IEEE
I. Buljan, K. Lázár i C. Kosanović, "Preparation and Spectroscopic Characterization of Iron Doped Mullite", Croatica Chemica Acta, vol.88, br. 2, str. 171-178, 2015. [Online]. https://doi.org/10.5562/cca2611

Sažetak
A novel method for preparation of Fe2+/Fe3+ substituted mullite is described. Aluminosilicate gels are applied as precursors instead of crystalline aluminosilicates as used in other common syntheses. The process is composed of three stages. First, iron is introduced into a homogeneous aluminosilicate gel by ion exchange. The gel is converted to a mixture of mullite and amorphous silica in a 1263 K 3 h isothermal calcination in the the second stage. Finally, in order to obtain the nano-scale pure mullite phase the formed amorphous silica is removed by a dissolution in alkaline media. The components formed in various stages of the process are characterized by 57Fe Mössbauer and Fourier transform infra red spectroscopies, X-ray diffraction method and scanning electron microscopy. Spectroscopic and diffraction methods helped the identification of the mullite phase. Mössbauer measurements revealed the presence of both Fe2+ and Fe3+ states providing a chance for perspective catalytic application of the obtained Fe-mullite.

Ključne riječi
iron doped mullite; SEM; 57Fe Mössbauer spectroscopy; FT-IR; XRD

Hrčak ID: 141990

URI
https://hrcak.srce.hr/141990

Posjeta: 840 *