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With MnSO 4 , NaOH and K 2 S 2 O 8 as the raw materials, the amorphous and δ-type manganese dioxide (MnO 2 ) is separately prepared by using different chemical precipitation-oxidation methods. The results of charge–discharge and electrochemical impedance spectroscopy (EIS) tests show that (i) the specific capacitance of the amorphous MnO 2 reaches to...
The bimodal porous structured silica materials consisting of macropores with the diameter of 5–20μm and framework-like mesopores with the diameter of 4.7–6.0nm were prepared using natural Manchurian ash and mango linin as macropored hard templates and P123 as mesopore soft templates, respectively. The macroporous structures of Manchurian ash and mango linin were replicated with the walls containing...
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