Investigation of nanocrystalline zinc chromite obtained by two soft chemical routes

Journal Article · Wed Jan 01 00:00:00 EST 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.08.062· OSTI ID:22341828

Gingasu, Dana ^[1]; Mindru, Ioana ^[1]; Culita, Daniela C.; Patron, Luminita; Calderon-Moreno, Jose Maria; Preda, Silviu ^[1]; Oprea, Ovidiu ^[2]; Osiceanu, Petre ^[1]; Morena Pineda, Eufemio ^[3]

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1. Ilie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, Bucharest 060021 (Romania)
2. “Politehnica” University of Bucharest, Faculty of Chemistry, Polizu Street 1-7, Bucharest (Romania)
3. School of Chemistry, University of Manchester, Oxford Road, M 13 9PL Manchester (United Kingdom)

Graphical abstract: - Highlights: • Two soft chemical routes to synthesize zinc chromites are described. • Glycine is used as chelating agent (precursor method) and fuel (solution combustion method). • The synthesized chromites have crystallite size in the range of 18–27 nm. • An antiferromagnetic (AFM) transition is observed at about T{sub N} ∼ 18 K. - Abstract: Zinc chromite (ZnCr{sub 2}O{sub 4}) nanocrystalline powders were obtained by two different chemical routes: the precursor method and the solution combustion method involving glycine-nitrates. The complex compound precursors, [ZnCr{sub 2}(NH{sub 2}CH{sub 2}COO){sub 8}]·9H{sub 2}O and [ZnCr{sub 2}(NH{sub 2}CH{sub 2}COOH){sub 4.5}]·(NO{sub 3}){sub 8}·6H{sub 2}O, were characterized by chemical analysis, infrared spectroscopy (IR), ultraviolet–visible spectroscopy (UV–vis) and thermal analysis. The structure, morphology, surface chemistry and magnetic properties of ZnCr{sub 2}O{sub 4} powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), infrared and Raman spectroscopy (RS), ultraviolet–visible spectroscopy (UV–vis) and magnetic measurements. X-ray diffraction patterns indicated the chromite spinel phase with good crystallinity and an average crystallite size of approximately 18–27 nm. The band gap values ranged between 3.31 and 3.33 eV. The magnetic measurements indicated an antiferromagnetic transition at T{sub N} ∼ 17.5/18 K.

• OSTI ID: 22341828
• Journal Information: Materials Research Bulletin, Vol. 49; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTROSCOPY
ANTIFERROMAGNETISM
ATOMIC FORCE MICROSCOPY
CHELATING AGENTS
CHEMICAL ANALYSIS
CRYSTALS
FUEL SOLUTIONS
GLYCINE
INFRARED SPECTRA
MAGNETIC PROPERTIES
NANOSTRUCTURES
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SPINELS
SYNTHESIS
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
ZINC