Visible light driven recyclable micromotors for on-the-fly water remediation

Organic pollutant, originating from both industry and domestic waste, has been greatly threatening the waters all over the world. Micromotors, integrated with photocatalysis, provide a promising solution to this critical challenge. In this work, by taking advantage of the positive motion of the micromotors and visible light response of photocatalysis, we fabricated BiOI microspheres based micromotors and applied them into organic pollutant removal in water. The motion characterization and dye degradation tests demonstrate that on-the-fly water remediation is realized under visible light irradiation. What's more, with the iron oxide nanoparticles embedded, the micromotors are recycled using magnet and reused in organic pollutant degradation. (C) 2019 Elsevier B.V. All rights reserved.