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用γ-射线辐射方法制备了MnO2、Mn2O3和Mn3O43种纳晶锰的氧化物，它们的平均粒径分别为10、20和22nm。通过与常规晶粒的相应粉末对比研究发现，纳晶粉末对CO的氧化反应的催化活性远远高于常规晶粒。经过一次催化实验之后，纳晶锰的氧化物的平均颗粒尺寸虽然有一定程度的增加，但仍保持在纳米范围内，这说明纳晶锰的氧化物作为CO氧化反应的催化剂是相对稳定的，因此，可以作为廉价和易得的清除CO的催化剂。
The nanocrystalline MnO2, Mn2O3 and Mn3O4 oxides were prepared by γ-ray irradiation. Their average particle sizes were 10, 20 and 22 nm, respectively. By comparing with the conventional powder, it is found that the catalytic activity of the nanocrystalline powder for the oxidation of CO is much higher than that of the conventional crystal. After a catalysis experiment, the average grain size of nanocrystalline manganese oxides increased to a certain extent, but remained within the range of nanometers, indicating that the nanocrystalline manganese oxide as a catalyst for CO oxidation reaction is relatively stable, Therefore, it can be used as a cheap and easy to remove CO catalyst.