College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China.
Chemosphere. 2022 Feb;288(Pt 1):132490. doi: 10.1016/j.chemosphere.2021.132490. Epub 2021 Oct 5.
It is of great significance to develop novel membranes with dual-function of simultaneously separating oil/water emulsion and degrading the contained water-miscible toxic organic components. To meet this requirement, a dual-functional Ni nanoparticles (NPs)@Ag/C-carbon nanotubes (CNTs) composite membrane was fabricated via electroless nickel plating strategy in this study. The as-prepared composite membrane possessed superhydrophilicity with water contact angle of 0° and splendid underwater oleophobic property with oil contact angle of 142°. When the membrane was applied for separation of surfactant stabilized oil-in-water emulsion, high permeate flux (about 97 L m·h under gravity), oil rejection (about 98.8%) and antifouling property were achieved. Benefitting from the NiNPs@Ag/C-CNTs layer on membrane surface, the composite membrane exhibited high catalytic degradation activity for water-miscible toxic organic pollutant (4-nitrophenol) with addition of NaBH in a flow-through mode. Meanwhile, the NiNPs@Ag/C-CNTs composite membrane possessed excellent durability, which was verified by the good structural integrity even under ultrasonic treatment. The cost-efficiency, high separation and degradation performance of the prepared membrane suggested its great potential for treatment of oily wastewater.
开发同时具有分离油/水乳液和降解所含水溶性有毒有机成分双重功能的新型膜具有重要意义。为了满足这一要求，本研究通过化学镀镍策略制备了一种双功能 Ni 纳米颗粒 (NPs)@Ag/C-碳纳米管 (CNTs) 复合膜。所制备的复合膜具有超亲水性，水接触角为 0°，水下疏油性极好，油接触角为 142°。当该膜用于分离表面活性剂稳定的油包水乳液时，可实现高渗透通量（重力作用下约 97 L·m·h）、高截留率（约 98.8%）和良好的抗污染性能。得益于膜表面的 NiNPs@Ag/C-CNTs 层，在添加 NaBH 的情况下，复合膜在流动模式下对水溶性有毒有机污染物（4-硝基苯酚）表现出高催化降解活性。同时，NiNPs@Ag/C-CNTs 复合膜具有优异的耐久性，即使在超声处理下，其结构完整性也很好。所制备的膜具有成本效益、高分离和降解性能，表明其在处理含油废水方面具有巨大的应用潜力。
