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Synthesis of LaFeO3 nanopowders by glycine–nitrate process without using any solvent: effect of temperature

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Abstract

Nano-sized LaFeO3 powders were prepared first time by glycine–nitrate combustion process at different temperatures without using water or any other solvent for the preparation of precursor solution and thus avoids impurities caused by water completely. The structures of phases, calcined at different temperatures, were refined in the space group Pbnm with orthorhombic setting and a good agreement was obtained between the observed and calculated XRD patterns. The crystallite size and specific surface area during the decomposition process were monitored up to 1200 °C. A pure nano-sized LaFeO3 powder with high specific surface area of 18.30 m2/g and a crystallite size of 49.35 nm was obtained after calcination at 400 °C, while TEM investigations reveal a porous powder with particles in the range of 46–69 nm. Calcinations to 1200 °C result in crystallite sizes up to 82.35 nm. Magnetic measurements reveal that LaFeO3 powders are anti-ferromagnetic. Both magnetic susceptibility and effective magnetic moments of the samples increase with decreasing particle size because of an increasing fraction of atoms lie at or near the surface.

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Acknowledgments

Authors are thankful to University Grants Commission, New Delhi for financial support under the UGC Major Research Project (F.No. 41-284/2012SR; dated 13.07.2012). Authors are also thankful to Dr. Harpreet Singh, Central Research Facility Section, Indian Institute of Technology Ropar, for recording XRD. Thanks are also due to Prof. Ramesh Chandra, Institute Instrumentation Centre, Indian Institute of Technology, Roorkee, for recording EDX, SEM and TEM.

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  1. Department of Chemistry, University of Jammu, Jammu, 180 006, India

    Suram Singh & Devinder Singh

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  1. Suram Singh
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  2. Devinder Singh
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Correspondence to Devinder Singh.

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Singh, S., Singh, D. Synthesis of LaFeO3 nanopowders by glycine–nitrate process without using any solvent: effect of temperature. Monatsh Chem 148, 879–886 (2017). https://doi.org/10.1007/s00706-016-1818-3

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  • DOI: https://doi.org/10.1007/s00706-016-1818-3

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