浙江理工大学应玉龙团队报道了用于无搅拌环境修复的气泡推进微型电机的MOFs胶体体的大规模自组装策略。相关研究成果于2022年9月19日发表于国际一流学术期刊《德国应用化学》。

基于MOF的微电机（MOFtors）的设计仍然具有挑战性，方法有限，尤其是对于MOF纳米颗粒（NPs）。

该文中，研究人员报告了一种可以有效地将MOF NPs自组装成稳健MOFtors的通用而直接的策略，从而在无需机械搅拌的情况下增强有机或重金属离子污染物的修复。基于瞬态Pickering乳液法，Fe₃O₄@NH2-UiO-66（Fe-UiO）NPs快速自组装成Fe₃O₄@NH₂-UiO-66大规模胶体小体（Fe-UiOSomes），并对其形成机制进行了系统研究。通过化学还原的Fe-UiOSomes-Pt微电机（Micromotor-C）在5 wt%H₂O₂水溶液中表现出450±180μm s^-1的较高移动能力。最后，采用气泡推进式Micromotor-C高效去除染料和重金属离子（MO为94%，CrVI为91%）。

该简单制造策略克服了当前的挑战，为无搅拌环境应用的基于小型MOF颗粒的气泡推进MOF的设计铺平了道路。

附：英文原文

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

Author: Hai Huang, Jie Li, Mengge Yuan, Haowei Yang, Yu Zhao, YULONG YING, Sheng Wang

Issue&Volume: 2022-09-19

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-assemble MOF NPs into robust MOFtors for enhanced organic or heavy metal ions contaminants remediation without mechanical stirring. Based on the transient Pickering emulsion method, Fe3O4@NH2-UiO-66 (Fe-UiO) NPs are rapidly self-assembled into Fe3O4@NH2-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 moving ability of 450±180 μm s-1 in a 5 wt% H2O2 aqueous solution. Finally, the bubble-propelled Micromotor-C was employed to efficiently remove dyes and heavy metal ions (94% for MO and 91% for CrVI). Our simple fabrication strategy overcomes the current challenges and paves the way to design bubble-propelled MOFtors based on small-size MOF particles for stirring-free environmental applications.

DOI: 10.1002/anie.202211163

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202211163