One-pot Preparation of Superparamagnetic Attapulgite/Fe_3O_4/polydopamine Nanocomposites for Adsorption of Methylene Blue

摘要

Superparamagnetic attapulgite/Fe_3O_4/polydopamine nanocomposites have been facilely prepared by a one-pot process without the nitrogen protection, in which Fe(III) was served as both of the oxidant for dopamine and the precursor of Fe_3O_4 in the presence of attapulgite. The introduction of attapulgite can effectively induce the uniform encapsulation of polydopamine and Fe_3O_4 nanoparticles on the surface of attapulgite, preventing from the formation of the free aggregates of Fe_3O_4 nanoparticles. The as-prepared APT/Fe_3O_4/PANI nanocomposites can be used as an adsorbent for the removal of methylene blue, and the adsorption ratio toward 100 ppm of methylene blue could reach 95.8%.