γ-ray radiation preparation and characterization of nanocrystalline manganese dioxide

Abstract Nanocrystalline manganese dioxide (MnO 2 ) powders have been prepared by radiating potassium permanganate (KMnO 4 ) aqueous solution with γ-ray at ambient pressure and temperature. The influence of the experimental conditions on the results has been studied in detail. TEM and XRD show that the smallest mean particle size of the product is about 6 nm and the particle size distribution is very narrow.