Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-04-15

Journal: JOURNAL OF APPLIED PHYSICS

Included Journals: EI、SCIE

Volume: 111

Issue: 8

ISSN: 0021-8979

Abstract: Hollow microstructures assembled of tetragonal MnO2 nano-columns have been synthesized through a facile hydrothermal method with the introduction of iron ions. The obtained samples were characterized by XRD, SEM, and vector network analysis. Results reveal that the presence of Fe3+ ions leads to transformation of phase structure from alpha-MnO2 to a mixture of epsilon-MnO2 and alpha-MnO2, and it is essential to include Fe3+ ions for the formation of the hollow MnO2 microstructures. The formation mechanism was investigated and proposed in detail. Fe-doped MnO2 exhibits decreased dielectric loss, but increased magnetic loss compared with the pure one. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705516]