Magnetic and Photocatalytic Behaviors of Ca Mn Co-Doped BiFeO₃ Nanofibres

Yannan Feng, Huanchun Wang, Yang Shen, Yuanhua Lin, Cewen Nan

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.

DOI: 10.4236/mrc.2013.23A001                

Abstract

Ca and Mn co-doped BiFeO₃ ultrafine nanofibres were prepared with the purpose of improving magnetic and photocatalytic performances of the one-dimensional multiferroic material. Impurity phase introduced by both Bi fluctuation and Mn substitution can be suppressed by Ca doping and a space group transition from R3c to C222 can also be triggered by Bi-site doping. With co-substitution of Mn into iron site, the Ca_0.15Bi_0.85Mn_0.05Fe_0.95O₃ nanofibres presented a larger saturation magnetization than the singly Ca doping samples, possibly due to the increased double exchange interation of Fe³⁺-O-Fe²⁺, strengthened by Ca and Mn. Photocatalytic degradation test witnessed a similar drop-and-rise performance with the magnetism.

Keywords

Bismuth Ferrite; Nanofibre; Magnetic; Photocatalytic

Conflicts of Interest

The authors declare no conflicts of interest.

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