Abstract
Metal-phenolic particles (MPPs) have received increasing attention due to their excellent physicochemical properties (e.g., high porosity, high stability, versatile coordination chemistry) for molecular adsorption. Herein, we constructed NIR light-propelled Janus MPPs@Au (JMPPs@Au) micromotors by depositing Au nanoparticles (NPs) onto the half surface of MPPs, to achieve the active molecular adsorption. Due to excellent photothermal conversion efficiency of Au half nanoshells and its asymmetrical Janus distribution, JMPPs@Au micromotors can make directional movement under the NIR-light irradiation. The translational diffusion coefficient of JMPPs@Au is 5.0 μm2/s and their velocity can reach 8.5 μm/s under NIR laser irradiation (808 nm, 3 W/cm2). Noteworthily, JMPPs@Au micromotors show the enhanced removal efficiency of 10.2 % for methylene blue (MB) dye under NIR light irradiation.
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