Twofold Interpenetrated 2D MOF Nanosheets Generated by an Instant In Situ Exfoliation Method: Morphology Control and Fluorescent Sensing,Advanced Materials Interfaces

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Twofold Interpenetrated 2D MOF Nanosheets Generated by an Instant In Situ Exfoliation Method: Morphology Control and Fluorescent Sensing
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-06-17 , DOI: 10.1002/admi.202000813
Qiang Liu _{1,

2} , Xiaofang Li ₁ , Yuehong Wen ₁ , Qingdou Xu _{1,

2} , Xin‐Tao Wu ₁ , Qi‐Long Zhu ₁

Affiliation

Metal–organic framework (MOF) nanosheets, an emerging family of 2D materials, have gained significant attention due to their thin thickness, large surface areas, abundant exposed accessible active sites, etc. However, it is still a big challenge to fabricate high‐quality 2D MOF nanosheets in high yields. Herein, a novel and facile synthetic strategy, named as instant in situ exfoliation method, is developed to prepare 2D MOF nanosheets with large lateral dimension, which combines the characteristics and advantages of the popular top‐down and bottom‐up approaches. Employing such methodology, the large MOF nanosheets with twofold interpenetrated 2D structure and unique fluorescent properties are massively obtained from the precursors in a high overall yield of 67%, of which the minimum thickness is ≈14.0 nm. Owing to their unique interpenetrated structure, lamellar morphology, and high fluorescent emission, the resultant MOF nanosheets are capable of functioning as an efficient fluorescent sensor to selectively and sensitively detect the Fe³⁺ and Al³⁺ ions, exhibiting much better detection limitation compared with the corresponding bulk MOF.

中文翻译：

即时原位剥落方法生成的双重互穿的2D MOF纳米片：形态控制和荧光传感

金属有机框架（MOF）纳米片是一种新兴的2D材料家族，由于其厚度薄，表面积大，暴露的可接触活性位点等而受到了广泛关注。然而，制造高密度的金属片仍然是一个巨大的挑战高品质的2D MOF纳米片。在本文中，开发了一种新颖，简便的合成策略，称为即时原位剥落方法，以制备具有较大横向尺寸的二维MOF纳米片，它结合了流行的自上而下和自下而上的方法的特点和优点。采用这种方法，可以从前体中大规模获得具有双重互穿2D结构和独特荧光性质的大型MOF纳米片，总产率高达67％，其中最小厚度为≈14.0nm。³⁺和Al ³⁺离子，与相应的体相MOF相比，表现出更好的检测限制。

更新日期：2020-06-17

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