School of Material Science and Engineering, University of Jinan, Jinan, China.
School of Material Science and Engineering, University of Jinan, Jinan, China.
J Colloid Interface Sci. 2019 Nov 1;555:234-244. doi: 10.1016/j.jcis.2019.07.059. Epub 2019 Jul 23.
This paper reports the first proof-of-concept of using bioinspired ZIF-8 based micromotors for efficient water remediation. Natural kapok fibers have unique hollow structure that contains cellulose and lignin, inspiring the design and fabrication of bubble-driving tubular micromotors as an active self-propelled micromachine for the removal of organic pollutants from water. The outer dense ZIF-8 layer can adsorb organic pollutants on the micromotors, and the inner catalyst acts as the engine decomposing fuel HO for providing bubble propulsion. The magnetic γ-FeO enables the external magnetic control movement and recovery of micromotors. The maximum adsorption capacity of ZIF-8-based magnetic micromotors toward Congo red and doxycycline were high as 394 and 242 mg g, respectively, mainly due to the enhanced micromotor-pollutant contacts by their autonomous motion and the resulting mixing associated effect. This novel ZIF-8 micromotor also showed outstanding stability and reusability in aqueous solution, indicating that their great potential for future application in water treatment.
本文首次证明了使用仿生 ZIF-8 基微马达进行高效水修复的概念验证。天然木棉纤维具有独特的中空结构，包含纤维素和木质素，启发了设计和制造气泡驱动管状微马达作为一种主动自推进微机器，用于从水中去除有机污染物。外层致密的 ZIF-8 层可以吸附微马达上的有机污染物，而内部催化剂则作为发动机分解燃料 HO 以提供气泡推进。磁性 γ-FeO 使微马达能够进行外部磁场控制运动和回收。基于 ZIF-8 的磁性微马达对刚果红和强力霉素的最大吸附容量分别高达 394 和 242mg/g，这主要是由于其自主运动增强了微马达-污染物的接触，并产生了混合相关效应。这种新型 ZIF-8 微马达在水溶液中也表现出出色的稳定性和可重复使用性，表明它们在水处理领域具有巨大的应用潜力。
