Rapid synthesis, structure and photocatalysis of pure bismuth A-site perovskite of Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3)

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 43; no. 24; pp. 9255 - 9259
• Main Authors: Zhang, Wenjuan, Chen, Jun, An, Xiaoxin, Wang, Qi, Fan, Longlong, Wang, Fangfang, Deng, Jinxia, Yu, Ranbo, Xing, Xianran
• Format: Journal Article
• Language: English
• Published: 01.05.2014
• Subjects: Decoloring; Ferroelectric materials; Ferroelectricity; Heating; Perovskites; Photocatalysis; Reflectance; Synthesis
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c3dt53621a

Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3), a member of a small group of pure Bi super(3+) A site perovskites, exhibiting a high ferroelectric Curie point (T sub(c)), was rapidly synthesized by a sample method of molten salt synthesis. The purity of Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3) samples is directly affected by the reaction conditions such as the soaking temperature, and the heating and cooling rates. The as-prepared Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3) particles are well-formed, cube-shaped single-crystals with sizes ranging from 200-300 nm. The chemical states of Bi and Fe ions are Bi super(3+) and Fe super(3+) in Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3). UV-vis diffuse reflectance spectra and preliminary photocatalytic experiments indicate that the pure Bi super(3+) A site perovskite of Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3) has a suitable energy bandgap (1.86 eV) and shows obvious photocatalytic activity for the decolorization of methyl blue under visible-light irradiation. The present work suggests potential future applications of Bi(Mg sub(3/8)Fe sub(2/8)Ti sub(3/8))O sub(3) in photocatalysis and ferroelectric photovoltaic effects.