Visible light triggered exfoliation of COF micro/nanomotors for efficient photocatalysis  

作　　者：Kai Feng Liang Zhang Jiang Gong Jinping Qu Ran Niu 

机构地区：[1]Key Laboratory of Material Chemistry for Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,Hubei Engineering Research Center for Biomaterials and Medical Protective Materials,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan,430074,China [2]The State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei-MOST)&Key Laboratory of Oral Biomedicine Ministry of Education,School and Hospital of Stomatology,Wuhan University,Wuhan 430079,China [3]National Engineering Research Center of Novel Equipment for Polymer Processing,Key Laboratory of Polymer Processing Engineering,Ministry of Education,Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing,School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou,510641,China

出　　处：《Green Energy & Environment》2023年第2期567-578,共12页绿色能源与环境（英文版）

基　　金：supported by Huazhong University of Science and Technology(No.2021XXJS036,3004013134);National Natural Science Foundation of China(No.51903099,82002879,22102059);the Innovation and Talent Recruitment Base of New Energy Chemistry and Device(No.B21003);China Postdoctoral Science Foundation(2021M692475,2021T140524,XJ2021037);support from the 100 Talents Program of the Hubei Provincial Government。

摘　　要：We report a new facile light-induced strategy to disperse micron-sized aggregated bulk covalent organic frameworks(COFs)into isolated COFs nanoparticles.This was achieved by a series of metal-coordinated COFs,namely COF-909-Cu,-Co or-Fe,where for the first time the diffusio-phoretic propulsion was utilized to design COF-based micro/nanomotors.The mechanism studies revealed that the metal ions decorated in the COF-909 backbone could promote the separation of electron and holes and trigger the production of sufficient ionic and reactive oxygen species under visible light irradiation.In this way,strong light-induced self-diffusiophoretic effect is achieved,resulting in good dispersion of COFs.Among them,COF-909-Fe showed the highest dispersion performance,along with a drastic decrease in particle size from 5μm to500 nm,within only 30 min light irradiation,which is inaccessible by using traditional magnetic stirring or ultrasonication methods.More importantly,benefiting from the outstanding dispersion efficiency,COF-909-Fe micro/nanomotors were demonstrated to be efficient in photocatalytic degradation of tetracycline,about 8 times faster than using traditional magnetic stirring method.This work opens up a new avenue to prepare isolated nanosized COFs in a high-fast,simple,and green manner.

关 键 词：Micro/nanomotor COFs EXFOLIATION NANOCATALYST PHOTOCATALYSIS 

分 类 号：TM30[电气工程—电机]