Building porphyrin-based MOFs on MXenes for ppb-level NO sensing,Journal of Materials Chemistry A

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Building porphyrin-based MOFs on MXenes for ppb-level NO sensing
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-02-20 , DOI: 10.1039/d3ta00072a
Yanwei Chang _{1,

2} , Minyi Chen _{1,

2} , Zijing Fu _{1,

2} , Ruofei Lu _{1,

2} , Yixun Gao _{1,

2} , Fengjia Chen _{3,

4} , Hao Li _{1,

2} , Nicolaas Frans de Rooij ₂ , Yi-Kuen Lee _{5,

6} , Yao Wang _{1,

2} , Guofu Zhou _{1,

2}

Affiliation

Fractional exhaled nitric oxide (FeNO) is a significant biological signaling molecule. However, the detection of ppb-level nitric oxide (NO) still faces great challenges. Herein, we designed and prepared a porphyrin-based MOF (Co-TCPP(Fe)) with rod-like morphology which was assembled with MXene (Ti₃C₂T_x) through hydrogen bonding to offer a kind of chemiresistive NO sensing hybrid (Co-TCPP(Fe)/Ti₃C₂T_x). The Co-TCPP(Fe)/Ti₃C₂T_x-20 based sensor showed superior NO sensing performance at room temperature including high response (R_a/R_g = 2.0, 10 ppm), reliable repeatability, high selectivity, low practical limit of detection (pLOD, 200 ppb), and fast room temperature NO sensing response/recovery speed (95 s/15 s, 10 ppm). The study of the gas sensing mechanism demonstrated that reviving more unoccupied Fe–N₄ units to sense NO by forming a rod-like MOF architecture and facilitating charge transfer by constructing a Schottky junction of Co-TCPP(Fe)/Ti₃C₂T_x jointly contribute to the superior performance of the obtained Co-TCPP(Fe)/Ti₃C₂T_x based NO sensor. This work not only paves an avenue for fabricating bimetallic porphyrin-based rod-like MOFs, but also proposes a facile strategy of constructing Schottky junctions between MOFs and MXenes for high-performance chemiresistive gas sensors, which acts as a guide for fabricating MOF-based hybrid sensing materials in the future.

中文翻译：

在 MXenes 上构建基于卟啉的 MOF 以实现 ppb 级 NO 传感

呼出气一氧化氮 (FeNO) 是一种重要的生物信号分子。然而，ppb级一氧化氮（NO）的检测仍然面临着巨大的挑战。在此，我们设计并制备了一种具有棒状形态的卟啉基 MOF (Co-TCPP(Fe))，它通过氢键与 MXene (Ti 3 C 2 T x ) 组装在一起，提供一种化学抗性_NO传感_杂化_物( Co-TCPP(Fe)/Ti ₃ C ₂ T _x )。基于 Co-TCPP(Fe)/Ti ₃ C ₂ T _x -20 的传感器在室温下表现出优异的 NO 传感性能，包括高响应 ( R _a / R _g= 2.0，10 ppm），可靠的重复性、高选择性、低实际检测限（pLOD，200 ppb）和快速的室温 NO 传感响应/恢复速度（95 s/15 s，10 ppm）。气体传感机制的研究表明，通过形成棒状 MOF 结构和通过构建 Co-TCPP(Fe)/Ti ₃ C ₂ T的肖特基结促进电荷转移，使更多未被占据的 Fe-N _{4单元复活以传感 NO}_x_{共同有助于获得的Co-TCPP(Fe)/Ti 3} C ₂ T _x的优异性能基于 NO 传感器。这项工作不仅为制造基于卟啉的双金属棒状 MOF 铺平了道路，而且还提出了一种在 MOF 和 MXenes 之间构建肖特基结的简便策略，用于高性能化学电阻气体传感器，作为制造基于 MOF 的指南未来的混合传感材料。

更新日期：2023-02-20

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