TY - JOUR
T1 - The role of dysprosium levels in the formation of mixed oxidation states within spinel MnCo2−xDyxO4 nanocrystalline powders
AU - Ramachandran, Tholkappiyan
AU - Natarajan, Selvi
AU - Hamed, Fathalla
N1 - Funding Information:
This research was supported by the UAE University under grant 31R164 -Research Center- ECHR-7-2018, UAE University, Al Ain- 15551 , United Arab Emirates. The authors thank Mr. S. Venkatesh for XPS measurement at MNCF, Centre for Nano Science and Engineering (CeNSE), IISc Bangalore, India.
Funding Information:
This research was supported by the UAE University under grant 31R164-Research Center- ECHR-7-2018, UAE University, Al Ain-15551, United Arab Emirates. The authors thank Mr. S. Venkatesh for XPS measurement at MNCF, Centre for Nano Science and Engineering (CeNSE), IISc Bangalore, India.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/7
Y1 - 2020/7
N2 - In this work, glycine-aided combustion synthesis of spinel-type MnCo2−xDyxO4 (x = 0.02, 0.04 and 0.06 %) nanocrystalline powders is presented. The mechanism involved in the chemical synthesis is briefly discussed. The integrity of the synthesized nanocrystalline powders was investigated and evaluated in correlation with dysprosium levels. Powder X-ray diffraction and Fourier-transform infrared spectroscopy studies confirmed the formation of pure spinel phase with cubic crystal structure. Scanning electron microscopy examinations revealed different agglomerated porous spongy morphologies that varied with different dysprosium levels. The analyses of X-ray photoelectron spectroscopy spectra showed different mixed oxidation states and cationic distributions among the octahedral and tetrahedral sites within the spinel structure as a function of dysprosium levels. It is suggested that MnCo2−xDyxO4 nanocrystalline powders with different morphologies and mixed oxidation states can be tailored via facile synthesis route.
AB - In this work, glycine-aided combustion synthesis of spinel-type MnCo2−xDyxO4 (x = 0.02, 0.04 and 0.06 %) nanocrystalline powders is presented. The mechanism involved in the chemical synthesis is briefly discussed. The integrity of the synthesized nanocrystalline powders was investigated and evaluated in correlation with dysprosium levels. Powder X-ray diffraction and Fourier-transform infrared spectroscopy studies confirmed the formation of pure spinel phase with cubic crystal structure. Scanning electron microscopy examinations revealed different agglomerated porous spongy morphologies that varied with different dysprosium levels. The analyses of X-ray photoelectron spectroscopy spectra showed different mixed oxidation states and cationic distributions among the octahedral and tetrahedral sites within the spinel structure as a function of dysprosium levels. It is suggested that MnCo2−xDyxO4 nanocrystalline powders with different morphologies and mixed oxidation states can be tailored via facile synthesis route.
KW - Glycine-aided combustion
KW - Manganese cobaltite
KW - Mixed oxidation states
KW - Nanocrystalline powders
KW - Spinel
KW - X-ray photoelectron spectroscopy
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U2 - 10.1016/j.elspec.2020.146952
DO - 10.1016/j.elspec.2020.146952
M3 - Article
AN - SCOPUS:85085474479
SN - 0368-2048
VL - 242
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
M1 - 146952
ER -