Large‐Scale Self‐Assembly of MOFs Colloidosomes for Bubble‐Propelled Micromotors and Stirring‐Free Environmental Remediation

Abstract The design of MOF‐based micromotors (MOFtors) is still challenging and with limited approaches, especially for the MOF nanoparticles (NPs). Herein, we report a universal and straightforward strategy to efficiently self‐assembly MOF NPs into robust MOFtors for enhanced organic‐ or heavy‐metal‐ion‐contaminants remediation without mechanical stirring. Based on the transient Pickering emulsion method, Fe 3 O 4 @NH 2 ‐UiO‐66 (Fe‐UiO) NPs are rapidly self‐assembled into Fe 3 O 4 @NH 2 ‐UiO‐66 colloidosomes (Fe‐UiOSomes) on a large scale, and the formation mechanism is systematically studied. The Fe‐UiOSomes‐Pt micromotors through chemical reduction (Micromotor‐C) presented a higher motility of 450±180 μm s −1 in a 5 wt% H 2 O 2 aqueous solution. Finally, the bubble‐propelled Micromotor‐C was employed to efficiently remove dyes and heavy metal ions (94 % for MO and 91 % for Cr VI ).