Metal-Oxide-Based Microjets for the Simultaneous Removal of Organic Pollutants and Heavy Metals

ACS Applied Materials & Interfaces
Katherine VillaSamuel Sánchez

Abstract

Water contamination from industrial and anthropogenic activities is nowadays a major issue in many countries worldwide. To address this problem, efficient water treatment technologies are required. Recent efforts have focused on the development of self-propelled micromotors that provide enhanced micromixing and mass transfer by the transportation of reactive species, resulting in higher decontamination rates. However, a real application of these micromotors is still limited due to the high cost associated to their fabrication process. Here, we present Fe2O3-decorated SiO2/MnO2 microjets for the simultaneous removal of industrial organic pollutants and heavy metals present in wastewater. These microjets were synthesized by low-cost and scalable methods. They exhibit an average speed of 485 ± 32 μm s-1 (∼28 body length per s) at 7% H2O2, which is the highest reported for MnO2-based tubular micromotors. Furthermore, the photocatalytic and adsorbent properties of the microjets enable the efficient degradation of organic pollutants, such as tetracycline and rhodamine B under visible light irradiation, as well as the removal of heavy metal ions, such as Cd2+ and Pb2+.

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Citations

Oct 12, 2018·Chemistry : a European Journal·Yulong Ying, Martin Pumera
Apr 17, 2019·Chemistry, an Asian Journal·Xiaocong ChangTianlong Li
Aug 10, 2019·Angewandte Chemie·Seyyed Mohsen Beladi-MousaviMartin Pumera
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