Free-Standing Janus Nanosheets: Ultrafast Self-Assembly and Versatile Biphase-Application,Advanced Functional Materials

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Free-Standing Janus Nanosheets: Ultrafast Self-Assembly and Versatile Biphase-Application
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-02-26 , DOI: 10.1002/adfm.202309966
Shuqi Li _{1,

2} , Xinming Jiang ₁ , Zhen Wang ₂ , Shuang Song ₁ , Zongwei Cai ₃ , Ken Cham‐Fai Leung ₃ , Tao Zeng _{1,

3,

4}

Affiliation

The development of stable Janus architectures suitable for biphasic applications holds significant importance. A novel approach is introduced for interfacial supramolecular self-assembly, resulting in 2D Janus nanosheets (OA-TA/Fe) exhibiting an amphiphilic nature. These nanosheets consist of hydrophilic coordination complexes of ferric ions (Fe³⁺) and tannic acid (TA) on one side of both surfaces and hydrophobic alkyl chains on the other side of both surfaces. The synthesis of these 2D Janus nanosheets involves a simple, ultrafast, and environmentally benign process, eliminating the need for time-consuming multistep procedures and harsh synthetic conditions typically associated with Janus architecture formation. By exploiting the inherent singular anisotropic wettability inherent in OA-TA/Fe-2, the efficacy of these innovative Janus nanosheets in the efficient separation of various organic liquid-in-water and water-in-organic liquid emulsions is elucidated. Subsequent post-modification of OA-TA/Fe has facilitated the highly efficient remediation of contaminated oily wastewater, serving as a model biphasic catalysis reaction, wherein the Janus nanosheets function simultaneously as emulsifiers and catalysts within biphasic mixtures. The methodology establishes a rapid self-assembly approach for the creation of amphiphilic free-standing Janus nanosheets, offering compelling prospects for their application in diverse fields, as exemplified by, but not limited to, the case studies presented herein.

中文翻译：

独立式 Janus 纳米片：超快自组装和多功能双相应用

开发适合双相应用的稳定 Janus 架构具有重要意义。引入了一种界面超分子自组装的新方法，产生具有两亲性的二维 Janus 纳米片 (OA-TA/Fe)。这些纳米片由两个表面一侧的铁离子 (Fe ³⁺ ) 和单宁酸 (TA) 的亲水性配位络合物和两个表面的另一侧的疏水性烷基链组成。这些 2D Janus 纳米片的合成涉及简单、超快且环保的过程，无需耗时的多步骤程序和通常与 Janus 结构形成相关的恶劣合成条件。通过利用 OA-TA/Fe-2 固有的奇异各向异性润湿性，阐明了这些创新的 Janus 纳米片在有效分离各种有机水包有机液体和有机液体包水乳液中的功效。随后的 OA-TA/Fe 后改性促进了受污染含油废水的高效修复，作为双相催化反应模型，其中 Janus 纳米片在双相混合物中同时充当乳化剂和催化剂。该方法建立了一种快速自组装方法，用于创建两亲性独立式 Janus 纳米片，为其在不同领域的应用提供了令人信服的前景，如但不限于本文介绍的案例研究所例证。

更新日期：2024-02-26

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