RuO2 sensitized metal organic framework derived In2O3 hollow nanotubes for ultra-sensitive and high-humidity trimethylamine detection

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-04-07 DOI:10.1016/j.jallcom.2025.180255

Shaobin Yang, Huilin Sun, Zhen Sun, Haichao Wang, Xueli Yang

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引用次数: 0

Abstract

In₂O₃ as a promising sensing material has attracted much attention in the field of gas sensitive research. Chemoresistive gas sensors based on In₂O₃ sensing materials have always suffered from poor humidity resistance and low sensitivity. In this work, RuO₂ was used to surface functionalize metal organic framework derived In₂O₃ hollow nanotubes via simple hydrothermal method. Gas sensing test results show that RuO₂ surface modification largely improves the gas sensing properties of pristine In₂O₃. Especially, 1.5 wt% RuO₂-In₂O₃ exhibits the highest response value (R_a/R_g = 338) to 100 ppm TMA at 200 ℃, which is 33 times higher than the pristine In₂O₃ (R_a/R_g = 10.3). The sensor also has a fast response time of only 3 s and a low detection limit (50 ppb, 1.3). In addition, the sensor also demonstrated good selectivity, repeatability and cross-sensitivity characteristics. The enhanced sensing mechanism is mainly attributed to the chemical and electrical sensitization of RuO₂ as well as the unique hollow nanotube structures of the sensing material. This work provides a promising direction for the development of highly sensitive and highly humidity resistance trimethylamine (TMA) sensors.

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RuO2敏化金属有机框架衍生的In2O3空心纳米管用于超灵敏高湿三甲胺检测

In2O3作为一种很有前途的传感材料，在气敏研究领域受到了广泛的关注。基于In2O3传感材料的化学电阻式气体传感器一直存在耐湿性差、灵敏度低的问题。在这项工作中，利用RuO2通过简单的水热法对金属有机骨架衍生的In2O3空心纳米管进行表面功能化。气敏试验结果表明，若o2表面改性能显著提高原始In2O3的气敏性能。特别是在200℃下，1.5 wt%的RuO2-In2O3对100 ppm TMA的响应值最高（Ra/Rg = 338），是原始In2O3 （Ra/Rg = 10.3）的33倍。该传感器还具有仅3秒的快速响应时间和低检测限（50 ppb, 1.3）。此外，该传感器还具有良好的选择性、重复性和交叉灵敏度特性。增强的传感机制主要归因于RuO2的化学和电敏化以及传感材料独特的空心纳米管结构。本研究为高灵敏、高耐湿三甲胺（TMA）传感器的开发提供了一个有希望的方向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.