Sulfate radical (SO4•−)-based advanced oxidation processes (SR-AOPs) have recently attracted much attention due to their potential in degrading organic pollutants. Metal-organic frameworks (MOFs) have been reported as effective materials to generate SO4•−. However, it is challenging to separate and recover the dispersed MOF particles from the reaction solution when MOFs are used alone. We used cellulose nanofibers (CNFs) as a porous filter template to immobilize Zn-based MOF, zeolitic imidazolate framework-8 (ZIF-8), and obtained a catalytic composite membrane having peroxymonosulfate (PMS) activating function to produce SO4•−. The CNF was effective in holding ZIF-8 nanoparticle and making a durable porous filter. The activated PMS-produced •OH and SO4•− radicals from ZIF-8 play an important role in the catalytic reaction. More than 90% of methylene blue and rhodamine B was degraded by ZIF-8/CNFs composite membrane in the PMS environment within 60 min. The ZIF-8/CNFs catalytic filters can be used several times without performance reduction for organic dye degradation. The results show that ZIF-8/CNFs catalytic membrane can be separated from organic pollution system quickly and used for the efficient separation and recovery of MOF particle-based catalytic materials. Therefore, this study provides a new perspective for fabricating the MOFs particles-immobilized catalytic filter by biomass nanocellulose-based materials for water purification. This method can be used for facile fabrication of the cellulose-based porous functional filter and open diverse applications.
|Publication status||Published - 2022 Apr 1|
Bibliographical noteFunding Information:
This work was supported by the Yonsei University Research Fund of 2021 ( 2021-22-0034 ) and the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIT ) (No. 2020R1C1C1004459 ). W. Zhu thanks to the suppot by the Natural Science Foundation of Jiangsu Province of China ( BK20201072 ), the National Natural Science Foundation of China ( 32071687 , 22108091 ), the National First-class Disciplines (PNFD) , the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) , the Postgraduate Research & Practice Innovation Program of Jiangsu Province ( KYCX20_0868 ), and the Self-made Experimental Teaching Instrument Project of Nanjing Forestry University of 2021 ( nlzzyq202113 ).
© 2021 Elsevier Inc.
All Science Journal Classification (ASJC) codes
- Environmental Science(all)