Controlled Sensor Derived from COF Materials for the Effective Detection of N-Methylpyrrolidone

IF 8.2 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2024-11-12 DOI:10.1021/acssensors.4c01399

Shiwei Liu, Weiyu Zhang, Guojie Zhang, Jun Sun, Ning Tian, Qihua Sun, Zhaofeng Wu

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Abstract

N-methylpyrrolidone (NMP) is an excellent advanced solvent that can be easily absorbed by the human body and has the characteristics of flammability and explosion. To reduce the risk, the environmental concentrations of NMP need to be measured. A series of covalent organic frameworks (COF) connected by an imine bond have been successfully prepared at room temperature by changing the synthesis time catalyzed by scandium(III) trifluoromethanesulfonate (Sc(OTf)₃). The effect of the synthesis time on the sample properties was compared by XRD, FT-IR, XPS, SEM, TEM, and BET. The results showed that synthesis time had almost no effect on the morphology, specific surface area, and functional groups of the COF samples but had a significant impact on the pore size distribution, residual bonds, and other defects, which in turn affected the gas sensing performance. The sensor results showed that all samples had good sensing performance for NMP, among which the sample synthesized for 48 h had the best sensing performance, with a limit of detection of 692 ppb and good stability and repeatability. The excellent performance of the COF samples benefits from the large specific surface area, hydrogen bonding interactions, electrostatic attraction, and high defects. This study provides an effective method for NMP detection and expands the application range of the COF materials.

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有效检测 N-甲基吡咯烷酮的 COF 材料可控传感器

N 甲基吡咯烷酮（NMP）是一种极易被人体吸收的高级溶剂，具有易燃易爆的特点。为了降低风险，需要对 NMP 的环境浓度进行测量。在三氟甲磺酸钪（III）（Sc(OTf)3）的催化下，通过改变合成时间，在室温下成功制备了一系列以亚胺键连接的共价有机框架（COF）。通过 XRD、FT-IR、XPS、SEM、TEM 和 BET 比较了合成时间对样品性质的影响。结果表明，合成时间对 COF 样品的形貌、比表面积和官能团几乎没有影响，但对孔径分布、残余键和其他缺陷有显著影响，进而影响气体传感性能。传感器结果表明，所有样品对 NMP 都具有良好的传感性能，其中合成时间为 48 小时的样品传感性能最好，检出限为 692 ppb，并且具有良好的稳定性和重复性。COF 样品的优异性能得益于其巨大的比表面积、氢键相互作用、静电吸引和高缺陷。这项研究为 NMP 检测提供了一种有效的方法，并扩大了 COF 材料的应用范围。

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来源期刊

ACS Sensors Chemical Engineering-Bioengineering

CiteScore

14.50

自引率

3.40%

发文量

372

期刊介绍： ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.