Formation of Na0.44MnO2 nanowires via stress-induced splitting of birnessite nanosheets
Birnessite, manganese oxide, nanowire, nanosheet, stress, conversion
High aspect ratio Na MnO nanowires with a complex one-dimensional (1 D) tunnel structure have been 0.44 2 synthesized. We found that the reaction went through layered birnessite nanosheet intermediates, and that their conversion to the ? nal product involved splitting of the nanosheets into nanowires. Based on our observations, a stress-induced splitting mechanism for conversion of birnessite nanosheets to Na MnO nanowires is 0.44 2 020 proposed. The ? nal and intermediate phases show topotaxy with 001 or 110 where f represents // f b b the ? nal Na MnO phase and b the intermediate birnessite phase. As a result of their high surface areas, the 0.44 2 nanowires are ef? cient catalysts for the oxidation of pinacyanol chloride dye.
Tsinghua University Press
Yanguang Li, Yiying Wu. Formation of Na0.44MnO2 nanowires via stress-induced splitting of birnessite nanosheets. Nano Res. 2009, 2: 54-60.