Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/5002
Title: Synthesis of active goethite and maghemite from scrap iron sources
Authors: Nayak, Rangadhar
Rao, J Rajagopala
Keywords: Goethite
Maghemite
Scrap iron
Thermal analysis
XRD
Issue Date: Jan-2005
Publisher: CSIR
Series/Report no.: G 01 N 25/02
Abstract: Investigations have been carried out on the oxidative hydrolysis of iron(II) chloride using<b style=""> </b>Na<sub>2</sub>CO<sub>3</sub> or<sub> </sub>NaOH. The products were subjected to hydrothermal agitation before being filtered and dried at 110<sup>o</sup>C. The samples were characterised by chemical analysis, surface area by nitrogen adsorption, thermal analysis and XRD. The studies indicate that samples prepared by different procedures and at different temperatures result in the formation of mixtures of goethite (<img src='/image/spc_char/alpha.gif'> -FeOOH), maghemite (<img src='/image/spc_char/gamma2.gif'>-Fe<sub>2</sub>O<sub>3</sub>), <img src='/image/spc_char/italics_e.gif'>-Fe<sub>2</sub>O<sub>3 </sub>and Fe<sub>3</sub>O<sub>4</sub> in varying compositions. All the samples, when heated to 400<sup>0</sup>C or above, are converted to <img src='/image/spc_char/alpha.gif'> -Fe<sub>2</sub>O<sub>3</sub>.
Description: 35-40
URI: http://hdl.handle.net/123456789/5002
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.64(01) [January 2005]

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