A facile approach to pure-phase Bi2Fe4O9 nanoparticles sensitive to visible light

作者：Wang X^*; Zhang M; Tian P; Chin W S; Zhang C M

来源：Applied Surface Science, 2014, 321: 144-149.

DOI：10.1016/j.apsusc.2014.09.166

• Multiferroic material
• Photocatalytic
• Bi2Fe4O9
• Sol-gel

Pure-phase Bi2Fe4O9 nanoparticles with mullite-type structure were successfully fabricated through a facile and environmentally benign sol-gel process. According to the UV-Vis diffuse reflection spectrum, the multiband structure and the band edge position of the nanoparticles were confirmed, indicating the prominent absorption in the expanded visible-light region. As compared to the bulk, the visible-light-driven photocatalytic activity of the obtained nanoparticles was improved by 30-fold. The much improved photocatalytic efficiency of the sample mainly owed to the small crystal size and the multiband characteristic as well as the adding of H2O2 as electron scavenger and a source of hydroxide free radicals instead of Fenton-like reaction, leading to a low recombination of the photogenerated e(-)/h(+) pairs.

• 出版日期2014-12-1
• 单位南京大学