Large-scale preparation of 3D self-assembled iron hydroxide and oxide hierarchical nanostructures and their applications for water treatment

Large-scale urchin-like iron hydroxide and oxide nanostructures were self-assembled through a low-temperature hydrothermal process assisted by two-way phase transition under sonication. The as-obtained iron hydroxide and oxide nanomaterials were used as adsorbents in waste-water treatment, and showed very good ability to remove organic pollutants.