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 value...

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Published in:ACS applied materials & interfaces 2014-06, Vol.6 (11), p.8845-8852
Main Authors: Xie, Yijun, Yan, Bin, Xu, Haolan, Chen, Jian, Liu, Qingxia, Deng, Yonghong, Zeng, Hongbo
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container_issue 11
container_start_page 8845
container_title ACS applied materials & interfaces
container_volume 6
creator Xie, Yijun
Yan, Bin
Xu, Haolan
Chen, Jian
Liu, Qingxia
Deng, Yonghong
Zeng, Hongbo
description 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.
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title Highly Regenerable Mussel-Inspired Fe3O4@Polydopamine-Ag Core–Shell Microspheres as Catalyst and Adsorbent for Methylene Blue Removal
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