Superhydrophobic magnetic core–shell mesoporous organosilica nanoparticles with dendritic architecture for oil–water separation,Materials Chemistry Frontiers

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Superhydrophobic magnetic core–shell mesoporous organosilica nanoparticles with dendritic architecture for oil–water separation
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-06-08 , DOI: 10.1039/d0qm00246a
Baixian Wang _{1,

2,

3,

4,

5} , Yingzhen Wei _{1,

2,

3,

4,

5} , Qifei Wang _{1,

2,

3,

4,

5} , Jiancheng Di _{1,

2,

3,

4,

5} , Shiding Miao _{3,

4,

5,

6} , Jihong Yu _{1,

2,

3,

4,

5}

Affiliation

The effective removal of oil contaminants from wastewater, especially dispersed tiny oil droplets, is an emerging technology, yet remains challenging. Core–shell structured nanoparticles with magnetic cores and hydrophobic shells have been explored for oil removal, but the adsorption capacity is unsatisfactory due to the low surface area and smooth surface. Herein, superhydrophobic magnetic core–shell mesoporous organosilica nanoparticles with dendritic architecture (Fe₃O₄@DMONs) were fabricated in a step-by-step condensation process, which could realize the rapid and efficient separation of dispersed tiny oil droplets from oil-in-water emulsions, giving a separation efficiency of higher than 98.1%. Meanwhile, thanks to the magnetically responsive property, the dispersed Fe₃O₄@DMONs could be collected simply by applying a magnetic field. In addition, the mesoporous structure as well as the dendritic architecture afforded Fe₃O₄@DMONs large adsorption capacities for various oils, ranging from 1.37 to 2.04 g g⁻¹. Fe₃O₄@DMONs showed good reusability with the remaining separation efficiency of 97.9% during five separation cycles for a cyclohexane-in-water emulsion. Furthermore, Fe₃O₄@DMONs could also adsorb a water-soluble dye in an oil-in-water emulsion with an adsorption efficiency up to 89.4%. Therefore, Fe₃O₄@DMONs hold promising potential as candidates for the practical purification of industrial wastewater.

中文翻译：

具有树突结构的超疏水磁性核-壳介孔有机硅纳米颗粒，用于油水分离

有效去除废水中的油污，特别是分散的微小油滴，是一项新兴技术，但仍具有挑战性。已经开发了具有磁性核和疏水壳的核-壳结构纳米颗粒用于除油，但是由于表面积小和表面光滑，因此吸附能力不令人满意。本文通过分步缩合工艺制备了具有树状结构的超疏水磁性核-壳介孔有机硅纳米颗粒（Fe ₃ O ₄ @DMONs），可以实现快速，有效地从油中分离出分散的微小油滴。 -水乳液，分离效率高于98.1％。同时，由于磁响应特性，分散的铁只需施加磁场即可收集₃ O₄ @DMON。另外，介孔结构以及树状结构为Fe₃ O₄ @DMONs提供了对各种油的大吸附能力，范围为1.37至2.04 gg^-1。Fe₃ O₄ @DMONs具有良好的可重复使用性，在五个分离循环中，水-环己烷乳液的剩余分离效率为97.9％。此外，Fe₃ O₄ @DMONs还可以以高达89.4％的吸附效率吸附水包油乳液中的水溶性染料。因此，Fe₃ O₄@DMON具有潜在的潜力，可作为实际净化工业废水的候选者。

更新日期：2020-07-02

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