Abstract: Isolated Mn2O3 nanotubes/fibers were prepared at a large scale with liquid-phase catalysis method. Mn2O3 nanotubes had the dimensions of exterior diameter 30~50 nm and length 0.2~1.0 mm approximately. Mn2O3 nanofibers possessed the dimensions of diameter 10~30 nm and length 0.4~2.0 mm approximately. Nano-Mn2O3 with different microstructures including nanotubes, nanofibers and nanoparticles could be synthesized by controlling the contents and proportions of KMnO4 and Fe(NO3)3. Fe(NO3)3 was a ideal catalyst for the preparation of Mn2O3 nanotubes/fibers. When Co(NO3)2 or Ni(NO3)2 was used to catalyze the reaction, only amorphous nano-Mn2O3 was synthesized. XRD result showed that Mn2O3 nanotubes owned crystalline structure different from o-Mn2O3, t-Mn2O3, h-Mn2O3 and g-Mn2O3.

Key words: manganic oxide, nanotube, nanofiber, ferric nitrate, synthesis

摘要： 采用简单的液相催化法实现了完全离散的Mn2O3纳米管/纤维的大规模制备. TEM电镜观察表明，Mn2O3纳米管外径约30~50 nm，长度约0.2~1.0 mm， Mn2O3纳米纤维直径约10~30 nm，长度约0.4~2.0 mm. 通过控制KMnO4和Fe(NO3)3的用量和比例可以分别得到管状、纤维状和颗粒状等不同微观形态的纳米Mn2O3. Fe(NO3)3是制备Mn2O3纳米管/纤维的理想催化剂，以Co(NO3)2和Ni(NO3)2作催化剂只能制得无定形颗粒. XRD分析表明，Mn2O3纳米管具有不同于已知的o-Mn2O3, t-Mn2O3, h-Mn2O3和g-Mn2O3的晶体结构.

关键词: Mn2O3, 纳米管, 纳米纤维, Fe(NO3)3, 制备