Cyclodextrin‐Functionalized Light‐Driven Cu 2 O Micromotors for Simultaneous Capture and Degradation of Bisphenol A

Résumé fourni par la source

Light‐driven micromotors capable of autonomous motion and pollutant removal offer promising strategies for active water remediation. Here, we introduce fuel‐free Cu 2 O‐based photocatalytic micromotors functionalized with β‐cyclodextrin (β‐CD) for the simultaneous capture and degradation of bisphenol A. Truncated‐octahedral Cu 2 O particles were decorated with Au nanoparticles to enable immobilization of thiolated β‐CD, forming Cu 2 O@Au@SH‐β‐CD micromotors. Under 475 nm illumination, β‐CD functionalization increases propulsion velocities in water to approximately 2.5–3 times in comparison with nonfunctionalized micromotors. In parallel, supramolecular β‐CD cavities promote bisphenol A capture, increasing local pollutant concentration at the photocatalyst surface. As a result, Cu 2 O@Au@SH‐β‐CD micromotors achieve 91% bisphenol A removal under light irradiation, with an apparent rate constant k app ≈ 0.021 min −1 , outperforming bare Cu 2 O and Cu 2 O@Au systems. These results demonstrate that supramolecular surface engineering can couple enhanced autonomous motion with selective capture and photocatalytic degradation in light‐driven micromotors.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.