Morphology and optical absorption of Bi_2Fe_4O_9 crystals via mineralizer-assisted hydrothermal synthesis  

作　　者：Yi Liu Ruzhong Zuo 

机构地区：[1]Institute of Electro Ceramics & Devices,School of Materials Science and Engineering,Hefei University of Technology

出　　处：《Particuology》2013年第5期581-587,共7页颗粒学报（英文版）

基　　金：supported by funding from the Natural Science Foundation of Anhui Province(1108085J14);the National Natural Science Foundation of China(50972035 and 51272060)

摘　　要：Submicron-sized Bi2Fe409 crystals were successfully synthesized via the hydrothermal method, while micron-sized Bi2Fe409 crystals with rod-like morphologies were obtained in the presence of the miner- alizer KN03. 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 con- cluded 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 Bi2Fe409 crystals was measured using an UV-vis spec- trophotometer, indicating that Bi2Fe409 powders can be used as effective photocatalysts under visible light.Submicron-sized Bi2Fe409 crystals were successfully synthesized via the hydrothermal method, while micron-sized Bi2Fe409 crystals with rod-like morphologies were obtained in the presence of the miner- alizer KN03. 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 con- cluded 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 Bi2Fe409 crystals was measured using an UV-vis spec- trophotometer, indicating that Bi2Fe409 powders can be used as effective photocatalysts under visible light.

关 键 词：Hydrothermal synthesisCrystal growthBi2Fe409 crystals 

分 类 号：O611.4[理学—无机化学]