Morphology and optical absorption of Bi2Fe4O9 crystals via mineralizer-assisted hydrothermal synthesis

作者：Liu, Yi; Zuo, Ruzhong^*

来源：Particuology, 2013, 11(5): 581-587.

DOI：10.1016/j.partic.2012.11.002

• Hydrothermal synthesis
• Crystal growth
• Bi2Fe4O9 crystals

Submicron-sized Bi2Fe4O9 crystals were successfully synthesized via the hydrothermal method, while micron-sized Bi2Fe4O9 crystals with rod-like morphologies were obtained in the presence of the mineralizer KNO3. X-ray diffraction, scanning electron microscopy and transmission electron microscopy were employed to characterize the products. According to a series of time-dependent experiments, it was concluded that the likeliest formation mechanism for the microrods was the Ostwald ripening process. It was proposed that the blocking effect of NO3- contributed to the formation of the rod-like powders. Moreover, the optical absorption of the prepared Bi2Fe4O9 crystals was measured using an UV-vis spectrophotometer, indicating that Bi2Fe4O9 powders can be used as effective photocatalysts under visible light.

• 出版日期2013-10
• 单位合肥工业大学