Study on Structural, Multiferroic, Optical and Photocatalytic Properties of Ferroelectromagnetic Nanoparticles: Bi_0.9Ba_0.1Fe_0.8Ti_0.2O₃

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• 作者：Manpreet Kaur ; Poonam Uniyal
• 关键词：Nanoparticles ; Multiferroic properties ; Impedance analysis ; Optical property ; Photocatalytic activity
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：30
• 期：2
• 页码：431-439
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

Ferroelectromagnetic nanoparticles (Bi_0.9Ba_0.1Fe_0.8Ti_0.2O₃) have been successfully fabricated for multifunctional applications and photocatalytic degradation of an industrial dye. X-ray diffraction of Bi_0.9Ba_0.1Fe_0.8Ti_0.2O₃ nanoparticles suggested the pure phase formation with tetragonal structure. The average particle size was found to vary in the range of 10–15 nm. An anomaly in dielectric constant was observed in the vicinity of antiferromagnetic transition temperature. Also, impedance spectroscopy measurements clearly indicated a non-Debye-type relaxation phenomenon in Bi_0.9Ba_0.1Fe_0.8Ti_0.2O₃ ceramic. The resistivity of the Bi_0.9Ba_0.1Fe_0.8Ti_0.2O₃ ceramic was of the order of 107Ω and was found to decrease with an increase in temperature. The remnant polarization (P_r) value of 9.77 μ C/cm 2 and weak ferromagnetic properties with a magnetization value of 0.025 emu/g were induced. The appropriate energy bandgap of nanoparticles (E_g = 2.161 eV) makes it suitable for the degradation of azo-dye in the visible region. The absorption peak intensity of azo-dye gradually decreased with the addition of Bi_0.9Ba_0.1Fe_0.8Ti_0.2O₃ nanoparticles. Finally, the nanoparticles degrade the azo-dye at approximately 94 % after 80 min in acidic medium.