Preparation of High Stability Graphene Oxide/Zinc Oxide Composite Membrane via Vacuum Filtration for Separation of Methylene Blue from Aqueous Solution,ChemistrySelect

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Preparation of High Stability Graphene Oxide/Zinc Oxide Composite Membrane via Vacuum Filtration for Separation of Methylene Blue from Aqueous Solution
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-09-15 , DOI: 10.1002/slct.202002725
Hongwei Liu ₁ , Qinya Huang _{2,

3} , Qiaoe Wang ₂ , Jun Li ₁ , Zhanchao Liu ₄ , Yan Liu _{2,

3}

Affiliation

In the present work, an excellent stable low graphene oxide/zinc oxide (LGO‐ZnO) composite membrane based on LGO nanosheets and ZnO nanonods has been successfully synthesized by vacuum filtration. The resultant graphene oxide nanosheet with a low degree of oxidation (LGO) was successfully prepared with the C/O ratio of 4.8 after stripped and oxidized. Importantly, the characterization results also demonstrated that ZnO nanorods were successfully intercalated into adjacent LGO nanosheets, rendering enlarged mass transfer channels, elevating hydration capacity and creating hierarchical nanostructures of membrane surfaces. Meanwhile, the stability of LGO‐ZnO composite membrane was enhanced obviously due to intercalation of ZnO nanorods, which was much more stable than that of LGO in aqueous solution. And it also exhibited outstanding permeation and separation performance for the water and various dyes solution system (with different concentration, volume or dye species), respectively. Accordingly, the permeate fluxes exhibited a drastic increase from 73 L/m²/h for LGO membrane to 1313 L/m²/h for LGO‐ZnO membrane. All the above results suggested that LGO‐ZnO membrane with high stability, high water permeability and favorable separation efficiency could be used as the great prospects membrane materials in separation of dyes from aqueous solution.

中文翻译：

真空过滤制备高稳定性氧化石墨烯/氧化锌复合膜以分离亚甲基蓝

在目前的工作中，已经通过真空过滤成功地合成了基于LGO纳米片和ZnO纳米结的优异稳定的低氧化石墨烯/氧化锌（LGO-ZnO）复合膜。汽提和氧化后，以4.8的C / O比成功制备了具有低氧化度（LGO）的所得氧化石墨烯纳米片。重要的是，表征结果还表明，ZnO纳米棒已成功插入相邻的LGO纳米片中，从而扩大了传质通道，提高了水合作用能力并创建了膜表面的分层纳米结构。同时，由于ZnO纳米棒的插层，LGO-ZnO复合膜的稳定性明显增强，其稳定性比LGO的水溶液稳定得多。而且，它对水和各种染料溶液系统（具有不同的浓度，体积或染料种类）也分别具有出色的渗透和分离性能。因此，渗透通量从73 L / m急剧增加²为LGO膜/ h至1313升/米² /对于LGO的ZnO系膜小时。以上所有结果表明，具有高稳定性，高透水性和良好分离效率的LGO-ZnO膜可作为从水溶液中分离染料的广阔前景。

更新日期：2020-09-15

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