Hydrothermal Synthesis, Physico-Chemical Characterization and Electrochemical Behavior of β-MnO2 Nanorods
Afef Bayoudh,
Noureddine Etteyeb,
Faouzi Sediri
Issue:
Volume 2, Issue 1, March 2016
Pages:
1-7
Received:
30 August 2016
Accepted:
7 October 2016
Published:
17 October 2016
DOI:
10.11648/j.ajn.20160201.11
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Abstract: A simple hydrothermal method was developed for the synthesis ofpyrolosite β-MnO2 nanorods, using potassium permanganate (KMnO4), manganese sulfate (MnSO4.H2O) and oxalic acid (H2C2O4). The effects of the reaction time, the hydrothermal temperature and the amount of H2C2O4 on the structure and the morphology of the final products were studied. The β-MnO2 nanorods are up to several micrometers in length and about 37 nm in average diameter. The samples were analyzed through X-ray diffraction (DRX), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy. Electrochemical measurements of thin film of β-MnO2 nanorods have revealed reversible redox behavior with charge-discharge cycling processes corresponding to reversible cations intercalation/deintercalation into the crystal lattice. This process is easier for the small Li+ to the larger Na+ one and to the largest K+ cation.
Abstract: A simple hydrothermal method was developed for the synthesis ofpyrolosite β-MnO2 nanorods, using potassium permanganate (KMnO4), manganese sulfate (MnSO4.H2O) and oxalic acid (H2C2O4). The effects of the reaction time, the hydrothermal temperature and the amount of H2C2O4 on the structure and the morphology of the final products were studied. The β...
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