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Preparation of highly stable ZnO/MOFs/polypropylene non-woven catalytic thin films by chitosan modification for organic wastewater treatment
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2024-09-06 , DOI: 10.1016/j.jallcom.2024.176374
Ziyang Zhang , Haoshuo Li , Jianguo Yuan , Shouwu Yu , Shujuan Xiao

The catalyst loading onto polymer films by pump-filtration can effectively solve the problem of catalyst separation and recycling, as well as expose more catalytically active sites. However, this method suffers from the disadvantage of poor catalyst attachment stability, which reduces the ability to catalyze the degradation of pollutants. In this paper, the high adhesion and film-forming properties of chitosan (CS) were utilized to modify the ZnO/NH2-MIL-88B (ZM) catalyst-loaded polypropylene non-woven (PP) composite membranes obtained by filtration, and CS/[ZM@PP] catalytic membranes with excellent catalyst adhesion stability and catalytic degradation performance were prepared. The results showed that the prepared CS/[ZM@PP]-X catalytic membranes significantly improved the recovery of the catalysts and possessed good catalytic performance, and the best-performed CS/[ZM@PP]-3 membrane could degrade more than 96.8 % of methylene blue (100 mL, 20 mg/L) within 60 min. In this paper, the effects of different factors on the catalyst recovery on the catalytic membrane were systematically investigated, and the prepared CS/[ZM@PP]-3 membrane can adapt to the complex aqueous environment, has excellent cycling stability, and still has more than 90 % degradation effect after 6 times of recycling, which has good potential for practical application.

中文翻译:


壳聚糖改性制备高稳定性ZnO/MOFs/聚丙烯无纺布催化薄膜用于有机废水处理



通过泵过滤将催化剂负载到聚合物膜上可以有效解决催化剂分离和回收问题,并暴露更多的催化活性位点。但该方法存在催化剂附着稳定性较差的缺点,降低了催化污染物降解的能力。本文利用壳聚糖(CS)的高附着力和成膜特性,对过滤所得的ZnO/NH2-MIL-88B(ZM)负载催化剂的聚丙烯无纺布(PP)复合膜进行改性,并得到CS制备了具有优异催化剂粘附稳定性和催化降解性能的/[ZM@PP]催化膜。结果表明,所制备的CS/[ZM@PP]-X催化膜显着提高了催化剂的回收率,并具有良好的催化性能,其中性能最好的CS/[ZM@PP]-3膜可降解96.8以上60 分钟内亚甲基蓝 (100 mL, 20 mg/L) 的百分比。本文系统研究了不同因素对催化膜催化剂回收率的影响,制备的CS/[ZM@PP]-3膜能够适应复杂的水环境,具有优异的循环稳定性,并且仍然具有循环使用6次后降解效果达90%以上,具有良好的实际应用潜力。
更新日期:2024-09-06
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