Yang Haibo, Dai Jingjing, Wang Lei, Lin Ying, Wang Fen, Kang Pan
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
Sci Rep. 2017 Apr 10;7(1):768. doi: 10.1038/s41598-017-00831-3.
A novel two-step approach consisting of hydrothermal process and subsequently selective etching has been developed to prepare flower-like three-dimensional porous BiFeO spheres with good uniformity and highly photocatalytic performance. XRD patterns and SEM images reveal that the BiFeO phase does not exhibit any changes after the etching process, and the crystal morphology evolves from micro-platelets to flower-like three-dimensional porous BiFeO spheres by controlling the experiment parameters. The change of morphology will lead to the significant increase of specific surface area, which would be beneficial to the enhancement of photocatalytic performance owing to prominent absorption in the ultraviolet and visible light region. As compared to BiFeO microplatelets, flower-like three-dimensional porous BiFeO spheres exhibit excellent photocatalytic degration rate of methyl orange (MO).
已开发出一种新颖的两步法，该方法由水热过程和随后的选择性蚀刻组成，用于制备具有良好均匀性和高光催化性能的花状三维多孔BiFeO球体。XRD图谱和SEM图像表明，蚀刻过程后BiFeO相未表现出任何变化，并且通过控制实验参数，晶体形态从微片状演变为花状三维多孔BiFeO球体。形态的变化将导致比表面积显著增加，由于在紫外和可见光区域有显著吸收，这将有利于光催化性能的提高。与BiFeO微片相比，花状三维多孔BiFeO球体表现出优异的甲基橙（MO）光催化降解率。
