title: Amorphous Fe²⁺-rich FeOx loaded in mesoporous silica as a highly efficient heterogeneous Fenton catalyst.
abstract: A simple physical-vapor-infiltration (PVI) method using ferrocene as the iron source, has been developed to load FeOx into the pore channels of mesoporous silica SBA-15. The obtained FeOx/SBA-15 composite has a high loading amount of FeOx (e.g. 26.64 wt% Fe content obtained at PVI duration 17 h and calcination temperature 450 °C) but unblocked pore channels thanks to the unique preparation strategy. The FeOx species are amorphous, rich of Fe(2+) and have been highly dispersed as a nanocoating onto the pore channel surface. The FeOx/SBA-15 composite was used as a heterogeneous Fenton catalyst to degrade Acid orange 7 (AO7). It showed a high catalytic activity and degradation efficiency, which was attributed to the high proportion of Fe(2+) in the amorphous FeOx and their favorable adsorption capability for the dye. The influences of the PVI duration, the calcination temperature and the Fenton reaction conditions (FeOx/SBA-15 dosages, H2O2 dosages and initial pH value) on the catalytic activity were investigated in detail.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, PR China. jlshi@mail.sic.ac.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.forename: Zhu
authors.initials: Z
authors.lastname: Shu
authors.forename: Lingxia
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiangqian
authors.initials: X
authors.lastname: Fan
authors.forename: Guiju
authors.initials: G
authors.lastname: Tao
authors.forename: Yongxia
authors.initials: Y
authors.lastname: Wang
authors.forename: Lisong
authors.initials: L
authors.lastname: Chen
authors.forename: Meiying
authors.initials: M
authors.lastname: Wu
authors.forename: Jianlin
authors.initials: J
authors.lastname: Shi