Enhancing sensitivity and selectivity in gas sensors: A novel approach using metal oxide-conducting polymer composites

IF 5.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Inorganic Chemistry Communications Pub Date : 2025-02-01 Epub Date: 2024-12-09 DOI:10.1016/j.inoche.2024.113726

A. Al Ojeery , M.A. Farea

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Abstract

The growing need for effective gas detection technologies has led to significant advancements in the development of gas sensors. This study introduces a novel Poly(o-toluidine) (POT)/Titanium dioxide (TiO₂) nanocomposite sensor for sulfur dioxide (SO₂) detection, demonstrating remarkable improvements in sensitivity, selectivity, and response/recovery times. The POT/TiO₂ nanocomposite sensor exhibits a threefold enhancement in sensitivity compared to pure POT, achieving a response of 186 at 50 ppm SO₂ at room temperature, a significant improvement over previous high-temperature-based SO₂ sensors. Additionally, the sensor demonstrates excellent repeatability and stability over 35 days, making it a promising candidate for industrial and environmental monitoring. The synergistic interaction between POT and TiO₂ enhances charge transfer and gas adsorption, resulting in faster and more reliable SO₂ detection and presenting an innovative solution for practical gas sensing applications.

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提高气体传感器的灵敏度和选择性：一种使用金属氧化物导电聚合物复合材料的新方法

对有效气体检测技术的需求日益增长，导致气体传感器的发展取得了重大进展。本研究介绍了一种新型的聚邻甲苯胺(POT)/二氧化钛（TiO2）纳米复合传感器，用于二氧化硫（SO2）检测，在灵敏度、选择性和响应/恢复时间上都有显著提高。与纯POT相比，POT/TiO2纳米复合传感器的灵敏度提高了三倍，在室温下对50 ppm SO2的响应达到186，比以前基于高温的SO2传感器有了显着提高。此外，该传感器在35天内表现出出色的可重复性和稳定性，使其成为工业和环境监测的有希望的候选者。POT和TiO2之间的协同作用增强了电荷转移和气体吸附，从而实现更快、更可靠的SO2检测，为实际气敏应用提供了创新的解决方案。

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来源期刊

Inorganic Chemistry Communications 化学-无机化学与核化学

CiteScore

5.50

自引率

7.90%

发文量

1013

审稿时长

53 days

期刊介绍： Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.