Chemical reduction of hematite with starch

被引：37

作者：

M. S. Ellid

Y. S. Murayed

M. S. Zoto

S. Musić

S. Popović

机构：

[1] Department of Physics, Tajura Nuclear Research Center, Tripoli

[2] Division of Materials Chemistry, Ruder Boskovic Institute, HR-10002 Zagreb

[3] Department of Physics, Faculty of Science, University of Zagreb, HR-10002 Zagreb

来源：

Journal of Radioanalytical and Nuclear Chemistry | 2003年 / 258卷 / 2期

关键词：

Oxide; Spectroscopy; Starch; Inorganic Chemistry; Magnetite;

D O I：

10.1023/A:1026285721065

中图分类号：

学科分类号：

摘要：

Chemical reduction of hematite with starch in air at elevated temperature was investigated using X-ray powder diffraction, FT-IR and 57Fe Mössbauer spectroscopies. On heating the starting mixture for 0.5 and 2 hours at 300 °C, magnetite and a small fraction of hematite were identified by XRD. With the heating time prolonged up to 24 hours, magnetite reoxidized and hematite was obtained again. The formation of magnetite was observed even at 580 °C. However, the magnetite formed at this temperature was substoichiometric, as shown by XRD and Mössbauer spectroscopy. Characteristic IR bands of oxide phases were monitored by FT-IR spectroscopy. Chemical reduction of hematite with starch into a Fe0 state was not observed in any sample.

引用

页码：299 / 305

页数：6

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