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Novel three-dimensional (3D) snowflake-like α-MnO2@δ-MnO2 (3D-MnO2), with hierarchical core-shell nanostructures, was synthesized by a facile hydrothermal route and chemical bath deposition method. The 3D-MnO2 can improve the defects of single-phase MnO2 as electrode materials. The microstructure and chemical composition of as-prepared samples were characterized by a series of means, such as XRD,...
Hierarchical NiS was synthesized under different vulcanizing time via a facial sacrificial template method with Ni(OH)2 microflowers as precursors. The as-prepared samples were characterized by XRD, BET, XPS, SEM and TEM. The results show that the NiS microstructure changes from microflower to microspheres gradually with the increase of vulcanizing time. Impressively, with the reaction time extending...
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