Highly regenerable mussel-inspired Fe₃O₄@polydopamine-Ag core-shell microspheres as catalyst and adsorbent for methylene blue removal.
We report a facile method to synthesize Fe3O4@polydopamine (PDA)-Ag core-shell microspheres. Ag nanoparticles (NPs) are deposited on PDA surfaces via in situ reduction by mussel-inspired PDA layers. High catalytic activity and fast adsorption of a model dye methylene blue (MB) at different pH values are achieved mainly due to the presence of monodisperse Ag NPs and electrostatic interactions between PDA and MB. The as-prepared Fe3O4@PDA-Ag microspheres also show high cyclic stability (>27 cycles), good acid stability, and fast regeneration ability, which can be achieved efficiently within several minutes by using NaBH4 as the desorption agent, showing great potentials in a wide range of applications.
Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 2V4, Canada.
Yijun
Y
Xie
Bin
B
Yan
Haolan
H
Xu
Jian
J
Chen
Qingxia
Q
Liu
Yonghong
Y
Deng
Hongbo
H
Zeng