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Photocatalytic GO/M88A “interceptor plate” assembled nanofibrous membrane with photo-Fenton self-cleaning performance for oil/water emulsion separation
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2021-06-23 , DOI: 10.1016/j.cej.2021.130948
Liyun Zhang , Yi He , Pingya Luo , Lan Ma , Shuangshuang Li , Yiling Nie , Fei Zhong , Yuqi Wang , Li Chen

Developing the high-efficient and robust antifouling membranes for oily emulsions to achieve the purpose of prolonging the service life of the membrane shows great demand because of the restriction of hydration anti-fouling mechanism strategy to against pollution. Herein, a hydrophilic photo-Fenton-like catalyst – GO/Fe-MOF assembled stabilized polyacrylonitrile (SPAN) nanofibrous membrane with underwater superoleophobicity, robust mechanical strength and photo-Fenton self-cleaning performance was firstly designed and fabricated via ultrasonic assistance, mussel-inspired fixation and low temperature hydrothermal synthesis methods. In this work, benefiting by the regulable amounts of GO nanosheets on the SPAN@GO/M88A membrane surface, the obtained membrane possessed sub-micrometer skin layer, which guarantees the balance of fast permeation flux (920–7083 ± 47 L m−2 h−1) and separation efficiency (>99.2%) for diesel/water emulsion with small emulsified oils. Moreover, introduced hydrophilic Metal-organic frame nanoparticles (MIL-88A (Fe)) into modified membrane endowed underwater anti-oil-fouling and photo-Fenton catalytic degradation performance for organic contaminants. Meanwhile, the charged GO/M88A heterostructure can assist to achieve demulsification for separation of surfactant-stabilized emulsions by strong electrostatic force. More importantly, attached and irremovable contaminants on the membrane can be quickly removed by photo-Fenton self-cleaning method, and achieved over 96% of recovery flux recovery ratio, which effectively prolonged the service life of the membrane. We believe the newly designed SPAN@GO/M88A membrane with hydration antifouling and photo-Fenton self-cleaning properties can stimulate more studies on revivable separation membranes for multifunctional applications.



中文翻译:

具有光芬顿自清洁性能的光催化GO/M88A“拦截板”组装纳米纤维膜用于油水乳液分离

由于水化防污机理策略对污染的限制,开发高效、坚固的油性乳液防污膜以达到延长膜使用寿命的目的显示出很大的需求。在此,首次通过超声波辅助设计和制造了一种亲水性光芬顿类催化剂——GO/Fe-MOF 组装的稳定聚丙烯腈 (SPAN) 纳米纤维膜,具有水下超疏油性、强大的机械强度和光芬顿自清洁性能。启发固定和低温水热合成方法。在这项工作中,受益于 SPAN@GO/M88A 膜表面上可调节数量的 GO 纳米片,获得的膜具有亚微米表层,−2小时−1) 和分离效率 (>99.2%) 的柴油/水乳液与小乳化油。此外,将亲水性金属有机框架纳米粒子(MIL-88A(Fe))引入改性膜中,赋予了水下抗油污和光芬顿催化降解有机污染物的性能。同时,带电的 GO/M88A 异质结构可以通过强静电力辅助实现表面活性剂稳定乳液分离的破乳。更重要的是,膜上附着的、不可去除的污染物可以通过光芬顿自洁法快速去除,达到96%以上的回收通量回收率,有效延长了膜的使用寿命。

更新日期:2021-06-25
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