Abstract
An aqueous solution reaction method is described for preparing nanofibrous MnO 2-base materials. A critical step in the synthesis is an extended period of refluxing of the reactive constituents, which enables the gradual transformation of an initial nanoparticle agglomerated mass into a random-weave nanofibrous structure. Partial transformation of the material realizes a novel bimodal morphology, which combines a high density of chemically active sites with an enhanced fluid permeability rate. High resolution TEM observations reveal that the nanoscale fibers are b-axis oriented single crystals, which contain lattice defects in the form of dislocation dipoles, molecular pores, and nanoscale holes.
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