One body, two hands: Photocatalytic Function and Fenton Effect Integrated Light Driven Micromotors for Pollutant Degradation
Threats of water pollution represent a serious global concern and require rapid and efficient neutralization methods. Herein, we report a novel two-in-one light-driven micromotors, i.e., light-driven TiO2-Fe Janus micromotors with both photocatalysis and photo-Fenton process, for efficiently degrading organic pollutants in contaminative water. The TiO2-Fe micromotors moved rapidly by utilizing the photocatalytic H2O2 decomposition over TiO2 under UV irradiation, as well as generate highly reactive oxygen species responsible for the in-situ degradation of the organic pollutants into nonharmful products. Notably, such coupling of photocatalysis generated on the TiO2 sides and photo-Fenton process generated on the Fe sides, along with the rapid movement of these catalytic Janus micromotors, result in a synergetic effect which can greatly enhance the degradation of organic pollutants. The degradation efficiency of the TiO2-Fe micromotors is 52 times over that of only Fenton effects, and it is further improved by 40% compare to photocatalytic degradation alone. Considering the excellent advantages of the high efficiency, simple structure, reusability and as well as the bubble-driven property, the new “on-the-fly” TiO2-Fe micromotors-based method have a promising potential for future water cleaning and waste-water treatments.