Super-Wetting Porous g-C3N4 Nanosheets Coated PVDF Membrane for Emulsified Oil/Water Separation and Aqueous Organic Pollutant Elimination,Advanced Materials Interfaces

当前位置： X-MOL 学术 › Adv. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Super-Wetting Porous g-C3N4 Nanosheets Coated PVDF Membrane for Emulsified Oil/Water Separation and Aqueous Organic Pollutant Elimination
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2021-09-14 , DOI: 10.1002/admi.202100962
Jinjuan Xue _{1,

2} , Jiamin Gao ₁ , Minjing Xu ₁ , Yuqing Zong ₁ , Mingxin Wang _{1,

2} , Shuaishuai Ma _{2,

3}

Affiliation

Super-wetting multifunctional membranes are highly attractive in the current decade in the environmental remediation of wastewater containing water-insoluble emulsified oils and water-soluble hazardous organic pollutants. Herein, hydroxyl modified porous g-C₃N₄ nanosheets (CNNS) coated polyvinylidene fluoride (PVDF) membrane is fabricated by a facile vacuum pumping process. Hydroxyl modified porous g-C₃N₄ nanosheets are firmly immobilized on flexible PVDF substrate via sodium alginate (SA) adhesive to create a stable surface micro/nanohierarchical structure. The fabricated CNNS/SA/PVDF membrane achieves the desired surface wettability of superhydrophilicity/underwater superoleophobicity with an anti-oil-fouling property. The functionalized membrane exhibits above 99% emulsified oil rejection rate with excellent stability and recyclability when separating oil-in-water emulsions. Besides, visible-light-response CNNS endow the as-prepared membrane with excellent photocatalytic activity. The resulted CNNS/SA/PVDF membrane can eliminate organic dye both in static and dynamic water with high flux recovery ratio and renewability, which conducted the procedures of photodegradation of organic dye adsorbed on the membrane surface after filtering the contaminative flowing aqueous solution, and directly the photodegradation of organic dye in stationary aqueous solution, respectively. This facile-fabrication and high-performance CNNS/SA/PVDF membrane provides a promising practical application toward oily and organic wastewater treatment. It also promotes the utilization of surface wettability modified g-C₃N₄ nanomaterial in the construction of multifunctional interface membrane for environmental purification.

中文翻译：

用于乳化油/水分离和水性有机污染物消除的超润湿多孔 g-C3N4 纳米片涂层 PVDF 膜

超润湿多功能膜在近十年来在含有水不溶性乳化油和水溶性有害有机污染物的废水的环境修复中极具吸引力。在此，羟基改性多孔gC ₃ N ₄纳米片（CNNS）涂覆的聚偏二氟乙烯（PVDF）膜是通过简单的真空泵工艺制造的。羟基改性多孔 gC ₃ N ₄纳米片通过海藻酸钠 (SA) 粘合剂牢固地固定在柔性 PVDF 基材上，以形成稳定的表面微/纳米分层结构。所制备的 CNNS/SA/PVDF 膜实现了所需的超亲水性/水下超疏油性的表面润湿性，并具有抗油污性能。在分离水包油乳液时，功能化膜表现出高于 99% 的乳化油截留率，以及出色的稳定性和可回收性。此外，可见光响应 CNNS 赋予所制备的膜优异的光催化活性。得到的 CNNS/SA/PVDF 膜可以去除静态和动态水中的有机染料，具有高通量回收率和可再生性，分别对污染的流动水溶液进行过滤后，对吸附在膜表面的有机染料进行光降解，对固定水溶液中的有机染料进行直接光降解。这种易于制造且高性能的 CNNS/SA/PVDF 膜为含油和有机废水处理提供了有前景的实际应用。它还促进了表面润湿性改性gC的利用₃ N ₄纳米材料在构建环境净化多功能界面膜中的应用。

更新日期：2021-10-08

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11