title: Magnetic photocatalysts with a p-n junction: Fe3O4 nanoparticle and FeWO4 nanowire heterostructures.
abstract: Magnetic n-type semiconductor Fe3O4 nanoparticle and p-type semiconductor FeWO4 nanowire heterostructures were successfully synthesized without any surfactants or templates via a facile one-step hydrothermal process at 160 °C. The heterojunction structure and morphology were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Magnetic measurements indicated the coexistence of ferrimagnetic behavior of Fe3O4 and weak antiferromagnetic behavior of FeWO4. The degradation of methylene blue (MB) under UV-Visible light irradiation was studied as a model experiment to evaluate the catalytic activity of the Fe3O4/FeWO4 heterostructure p-n junctions. The decomposition efficiency was 97.1% after one hour UV-Visible irradiation. This magnetic photocatalyst can be easily recovered from the solution using a permanent magnet and redispersed by removing the magnet.
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China. panggs@jlu.edu.cn.
authors.forename: Xuan
authors.initials: X
authors.lastname: Cao
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.forename: Shihui
authors.initials: S
authors.lastname: Jiao
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Fang
authors.forename: Man
authors.initials: M
authors.lastname: Xu
authors.forename: Xu
authors.initials: X
authors.lastname: Liu
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.forename: Guangsheng
authors.initials: G
authors.lastname: Pang
authors.forename: Shouhua
authors.initials: S
authors.lastname: Feng