کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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611840 | 880686 | 2008 | 6 صفحه PDF | دانلود رایگان |
Mesoporous MnO2 has been synthesized by means of a novel, facile, and template-free method by virtue of a soft interface between CCl4 and H2O without any surfactants or organometallic precursors or ligands. X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy analysis, scanning electron microscopy, and an ASAP2010 autoadsorption analyzer were applied to investigate the composition and microstructure of the as-synthesized MnO2. The structure characterizations indicated a good mesoporous structure for as-prepared MnO2 with an adsorption average pore diameter of 9.7 nm, mesoporous volume of 0.58 cm3 g−1, and Brunauer–Emmett–Teller specific surface area of 239 m2 g−1. Electrochemical properties of the mesoporous MnO2 were elucidated by cyclic voltammograms, galvanostatic charge–discharge, and electrochemical impedance spectroscopy in 1 M Na2SO4 electrolyte. Electrochemical data analysis demonstrated that as-synthesized MnO2 had good capacitive behavior due to its unique mesoporous structure. A specific capacitance of ca. 220 F g−1 could still be delivered for the mesoporous MnO2 even at a scan rate of 100 mV s−1.
Mesoporous MnO2 with good electrochemical performance has been synthesized by means of a facile and template-free method by virtue of soft interface between CCl4 and H2O.Figure optionsDownload as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 322, Issue 2, 15 June 2008, Pages 545–550