催化作用
化学
水溶液
静电纺丝
锌
化学工程
纳米纤维
膜
可重用性
金属有机骨架
降级(电信)
无机化学
有机化学
聚合物
吸附
工程类
电信
生物化学
程序设计语言
计算机科学
软件
作者
Mengjie Pu,Daqi Ye,Jinquan Wan,Bentuo Xu,Wei Sun,Wei Li
标识
DOI:10.1016/j.seppur.2022.121716
摘要
A novel peroxymonosulfate (PMS) catalyst, zinc-based metal–organic framework electrospinning (ES) nanofibers membrane (short for ZIF-65/PAN) was firstly fabricated and used for the degradation of aqueous ciprofloxacin (CIP). Physicochemical properties, catalytic performance, stability, reusability, and the regeneration of ZIF-65/PAN was observed and conducted. Influence of various parameters including ZIF-65 loading content, reaction temperature, initial pH, and competitive organic molecules on CIP degradation was investigated. Reactive active species and degradation intermediates that involved in ZIF-65/PAN/PMS/CIP process were identified. Corresponding reaction mechanisms were speculated. The results indicate that the easy-separation ZIF-65/PAN nanofibers exhibit high efficiency for PMS activation, 89.2 % of CIP was degraded within 60 min, with up to 87.5 % of PMS utilization efficiency. ZIF-65/PAN was renewable through simple layer-by-layer self-assembly, thus shows good prospect in future applications. 26.4 % of surface Zn2+ of ZIF-65/PAN exists in the form of + III oxidation state after activation, indicating the role of zinc catalytic site. Through activation, oxidative active species SO4·−, ·OH, and 1O2 was generated, CIP was thus degraded through mainly-three pathways. This study provides novel ideas for the application of MOF-based membrane on PMS based advanced oxidation processes.
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