Nanoarchitectonics on Oxygen-Rich Vacancy C/OVs-Ni-Cu-LDHs@MnO₂ Tubular Micromotors for Sensitive Detection and Efficient Catalytic Degradation

C/OVs-Ni-Cu-LDHs@MnO₂ tubular micromotors with enzyme-like activity and abundant oxygen vacancies (OVs) were synthesized hydrothermally using kapok as a biotemplate. MnO₂ acted as the micromotor's "driving engine", catalyzing the generation of H₂O₂ bubbles to provide driving force for the motor, enabling efficient motion (144.45 ± 3.97 μm/s in 5% H₂O₂). The micromotors also exhibited enzyme-like activity, oxidizing 3,3',5,5'-tetramethylbenzidine (TMB) via reactive radicals. A sensor for the colorimetric detection of GLY (lowest detection limit 0.63 μM) was developed by utilizing the enzyme inhibition induced by Cu²⁺-glyphosate (<i>N</i>-(phosphonomethyl)glycine, GLY) chelation. Meanwhile, the micromotor catalyzes H₂O₂ and activates peroxymonosulfate (PMS), efficiently generating hydroxyl radicals (^•OH), superoxide radicals (O₂^•-), and single-linear oxygen (¹O₂). Under the synergistic effect of self-driven propulsion and efficient catalysis, achieving 93.71% GLY degradation in 40 min. This study provides an intelligent strategy for developing dynamic sensors with dual functions of simultaneous detection and degradation of GLY.