Controlled synthesis of Bi25FeO40with different morphologies: growth mechanism and enhanced photo-Fenton catalytic properties.
Bi25FeO40microtetrahedra, microcubes and microspheres were successfully synthesized by a simple hydrothermal process and by adding different additive agents. The formation mechanism of Bi25FeO40microcrystals was proposed; the additive agents had important influences on the morphology and facet exposure of the products. The catalytic activity of these materials was evaluated by the degradation of RhB in a heterogeneous photo-Fenton process. The Bi25FeO40microcubes showed enhanced photo-Fenton catalytic activity, which can be attributed to an exposed {001} facet with the active O atoms. The hydroxyl radicals are the main active group in the heterogeneous photo-Fenton catalytic degradation. This study may provide a new method to design and synthesize novel nanoscale and microscope functional materials.
Hubei Provincial Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, P.R. China. gkzhang@whut.edu.cn.
Wenda
W
Ji
Mingmeng
M
Li
Gaoke
G
Zhang
Pei
P
Wang