Multifunctional micro/nanomotors that can sensitively detect and rapidly remove pollutants have gained growing concern in environmental monitoring and remediation. Herein, we present a bioinspired hierarchical ZrO2/MnFe2O4/FeZr-MOF tubular magnetomotor with peroxidase-like activity as an active and smart platform for simultaneously colorimetric detection and specific purification of trace hazardous glyphosate under neutral conditions from complex environmental matrices. The well-designed Zr-containing micromotors were composed of ZrO2 microtubes acting as a support and MnFe2O4 nanosheets functioning as a catalyst and magnetic guidance as well as FeZr-MOF octahedron with intrinsic peroxidase-like activity, constructing a unique hierarchical architecture with abundant exposed reactive sites. The chemically-powered microrobots could autonomously move in a circle-like motion pattern by O2 bubbles generated from the MnFe2O4-catalyzed decomposition of H2O2 with a velocity of 101.6 ± 10.2 μm·s-1 in 5% H2O2. Benefiting from the combination of autonomous motion with the powerful affinity between Zr-O clusters and phosphate groups as well as the robust peroxidase-like activity, the resulting dynamic Zr-based micromotors render such specific capture and adsorption of glyphosate with LOD of 0.05 mg·mL-1 and the maximum adsorption capacity of 313.5 mg·g-1. Particularly, the microdevices enabled the colorimetric detection toward glyphosate under neutral pH, which may be ascribed to the acidic microenvironment generated from the oxygen-containing groups in the micromotors. This study provides a promising pathway for the rational construction of multifunctional microcleaners for simultaneous determination and removal of organic pollutants from wastewater.

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