文摘
The birnessite-type layered manganese oxide nanoplates with good dispersity and regular hexagonal morphology were obtained by topochemical oxidizing precursor Mn(OH)2 in NaClO solution for 24 h at room temperature, and its formation process was systematically investigated on the basis of the XRD pattern, FESEM and TEM images, XPS, Raman spectra, and TG-DTA analysis. The research results showed that the obtained birnessite-type layered manganese oxide nanoplates inherited the layered structure and regular hexagonal morphology from their Mn(OH)2 precursor. The regular hexagonal nanoplates were about 150 nm in each lateral edge with a thickness of 120 nm, which were self-assembled from MnO2 particles. The dispersity and regular morphology of the obtained materials were affected by the precursor Mn(OH)2 and the oxidation reaction times. This intermediate-mediated topochemical oxidation method could contribute to the design of new kinds of metal oxide materials with novel morphology and potential application.