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Nanopowder MnO 2 was prepared with two oxidation reduction methods.XRD,SEM,FT IR and surface area measurement techniques were used to investigate properties of the MnO 2 powder.The results showed that the nano MnO 2 with an average diameter in 30～50nm and good dispersity and high catalytic activity for H 2O 2 decomposition,can be synthesized with the two methods.With reduced crystal size of the powder,the infrared absorption peak of Mn O bond was blue shifted and fissioned,one shifted 61 19cm -1 and the other shifted 11 15cm -1 ,and the characteristic vibration bands of adsorption water were also blue shifted.
Nanopowder MnO 2 was prepared with two oxidation reduction methods. XRD, SEM, FT IR and surface area measurement techniques were used to investigate properties of the MnO 2 powder. The results showed that the nano-MnO 2 with an average diameter in 30-50 nm and good dispersity and high catalytic activity for H 2O 2 decomposition, can be synthesized with the two methods. Reduced crystal size of the powder, the infrared absorption peak of Mn O bond was blue shifted and fissioned, one shifted 61 19 cm -1 and the other shifted 11 15cm -1, and the characteristic vibration bands of adsorption water were also blue shifted.