Highly Sensitive Ethylene Glycol Gas Sensor Based on MIL-68(In)@ZIF-8 Derivative

IF 8.2 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2024-12-05 DOI:10.1021/acssensors.4c02087

Huirong Kou, Tingting Shao, Juntang Dong, Fuchun Zhang, Shuwei Tian, Xiaoyang Wang

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Abstract

Ethylene glycol, as a colorless and tasteless organic compound, is an important industrial raw material but can be hazardous to the environment and human health. Thus, the development of high-performance sensing materials is required for the monitoring of ethylene glycol. In this paper, a method to synthesize In₂O₃@ZnO using MIL-68(In)@ZIF-8 to serve as a sacrificial template is proposed for testing ethylene glycol sensing capabilities. For verifying an effective improvement in gas-sensitive performance by bimetallic organic skeleton (MOF) synthesized heterojunctions, we performed gas-sensitive tests on In₂O₃, ZnO, and In₂O₃@ZnO. In₂O₃@ZnO has the best sensitivity to ethylene glycol, including ultrahigh response value (20 ppm-200.12), moderate response/recovery time (53/50 s), and excellent selectivity. The construction of heterojunction is the main reason for enhancing the ethylene glycol response of the sensor. On this basis, the gas-sensitive enhancement mechanism of composites is analyzed. The results show that the design method of synthesizing heterojunctions using bis-MOFs proposes a new approach that enhances the properties of ethylene glycol.

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基于MIL-68(In)@ZIF-8衍生物的高灵敏度乙二醇气体传感器

乙二醇是一种无色无味的有机化合物，是重要的工业原料，但对环境和人体健康有危害。因此，开发高性能传感材料是监测乙二醇的必要条件。本文提出了一种以MIL-68(In)@ZIF-8作为牺牲模板合成In2O3@ZnO的方法，用于测试乙二醇传感能力。为了验证双金属有机骨架（MOF）合成异质结对气敏性能的有效改善，我们对In2O3、ZnO和In2O3@ZnO进行了气敏测试。In2O3@ZnO对乙二醇的灵敏度最高，具有超高的响应值（20 ppm-200.12）、中等的响应/恢复时间（53/50 s）和优异的选择性。异质结的结构是提高传感器对乙二醇响应的主要原因。在此基础上，分析了复合材料的气敏增强机理。结果表明，利用双mof合成异质结的设计方法为提高乙二醇的性能提供了一条新的途径。

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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.