TY - JOUR
T1 - Investigation of nanocrystalline zinc chromite obtained by two soft chemical routes
AU - Moreno Pineda, Eufemio
AU - Gingasu, Dana
AU - Mindru, Ioana
AU - Culita, Daniela C.
AU - Patron, Luminita
AU - Calderon-Moreno, Jose Maria
AU - Preda, Silviu
AU - Oprea, Ovidiu
AU - Osiceanu, Petre
AU - Morena Pineda, Eufemio
PY - 2014
Y1 - 2014
N2 - Zinc chromite (ZnCr2O4) nanocrystalline powders were obtained by two different chemical routes: the precursor method and the solution combustion method involving glycine-nitrates. The complex compound precursors, [ZnCr2(NH2CH2COO)8]·9H 2O and [ZnCr2(NH2CH2COOH) 4.5]·(NO3)8·6H2O, 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 ZnCr2O 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 TN ∼ 17.5/18 K. © 2013 Elsevier Ltd. All rights reserved.
AB - Zinc chromite (ZnCr2O4) nanocrystalline powders were obtained by two different chemical routes: the precursor method and the solution combustion method involving glycine-nitrates. The complex compound precursors, [ZnCr2(NH2CH2COO)8]·9H 2O and [ZnCr2(NH2CH2COOH) 4.5]·(NO3)8·6H2O, 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 ZnCr2O 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 TN ∼ 17.5/18 K. © 2013 Elsevier Ltd. All rights reserved.
KW - A. Oxides
KW - B. Chemical synthesis
KW - C. Photoelectron spectroscopy
KW - C. X-ray diffraction
KW - D. Magnetic properties
U2 - 10.1016/j.materresbull.2013.08.062
DO - 10.1016/j.materresbull.2013.08.062
M3 - Article
SN - 0025-5408
VL - 49
SP - 151
EP - 159
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 1
ER -