Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2020-04-27 , DOI: 10.1016/j.apcatb.2020.119047
Haibo Lin , Qile Fang , Wen Wang , Guiliang Li , Jianmin Guan , Yi Shen , Jianrong Ye , Fu Liu
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Catalytic membranes as heterogeneous advanced oxidation microreactors are appealing for persistent organic pollutants (Pops) treatment. Constructing a robust catalytic membrane with highly active sites for instantaneous and standing mineralization of flowing Pops are challenging in its practical application. Herein, we enable in-situ growth and firm enchasing of Prussian blue (PB) micro-crystals in the micro-clusters of Polyvinylidene fluoride (PVDF) membrane, where active sites are fully exposed for oxidant reagent and target contaminants. The designed PB@PVDF catalytic membrane demonstrates exceptional efficiency for instantaneous degradation of recalcitrant organic molecules e.g. bisphenol A, methylene blue, rhodamine B as well as humic acid. The membrane maintains high removal efficiency above 99% for MB with a constant flux of 300 L m−2 h−1 during a long-term (24 h) cross-flow test. Both the enrichment of radials and pollutants in confined tortuous micro-pores and prompt flowing away of degraded products lead to the superior catalytic activity of heterogeneous Fenton reactors.
中文翻译:
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普鲁士蓝/ PVDF催化膜具有出色且稳定的Fenton氧化性能,可去除有机污染物
催化膜作为异质高级氧化微反应器吸引了持久性有机污染物(Pops)处理。构建具有高活性位点的坚固的催化膜,以对流动的持久性有机污染物进行瞬时和静置矿化,在其实际应用中具有挑战性。在这里,我们就地启用聚偏二氟乙烯(PVDF)膜的微簇中的普鲁士蓝(PB)微晶体的生长和牢固附魔,其中活性位完全暴露于氧化剂和目标污染物。设计的PB @ PVDF催化膜对难降解有机分子(例如双酚A,亚甲基蓝,若丹明B和腐殖酸)的瞬间降解表现出卓越的效率。在长期(24 h)错流测试中,膜以300 L m -2 h -1的恒定通量保持MB的高去除效率超过99%。受限的曲折微孔中径向物质和污染物的富集以及降解产物的迅速流走均导致非均相Fenton反应器的优异催化活性。