Enhanced detection of ammonia (NH3) using a TiO2/PANI/GO composite for real-time environmental monitoring

IF 2.8 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2025-03-14 DOI:10.1016/j.cplett.2025.142044

H.M. Ragab , N.S. Diab , Ghadah Mohammad Aleid , Rosilah Ab Aziz , M.O. Farea , N. Yusof , Maamon A. Farea

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Abstract

Developing robust, effective, and sensitive gas sensors is essential for industrial and environmental monitoring. In this study, we report a nanocomposite-based gas sensor comprising TiO₂, polyaniline (PANI), and graphene oxide (GO), which exhibits exceptional NH₃ sensing performance. Incorporating TiO₂ and GO into the PANI matrix greatly improved the sensor's sensitivity, response/recovery times, and selectivity at room temperature. Morphological and structural analyses using FESEM, XRD, Raman, and FTIR confirmed the successful integration of these materials, highlighting their synergistic effects. The TiO₂/PANI/GO composite achieved a remarkable sensitivity of 96 % at 100 ppm NH₃ with response and recovery times of 124 s and 102 s, respectively, outperforming previously reported NH_3₃ sensors. Moreover, the composite demonstrated excellent stability over 50 days and high selectivity toward NH₃ against interfering gases, including NO₂, SO₂, H₂S, and CO. These results underscore the potential of TiO₂/PANI/GO as a robust candidate for real-time gas sensing applications.

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利用TiO2/PANI/GO复合材料增强氨（NH3）的实时环境监测

开发坚固、有效、灵敏的气体传感器对于工业和环境监测至关重要。在这项研究中，我们报道了一种由TiO2、聚苯胺（PANI）和氧化石墨烯（GO）组成的纳米复合材料气体传感器，该传感器具有优异的NH3传感性能。将二氧化钛和氧化石墨烯加入聚苯胺基体中，大大提高了传感器在室温下的灵敏度、响应/恢复时间和选择性。利用FESEM， XRD， Raman和FTIR进行的形态和结构分析证实了这些材料的成功集成，突出了它们的协同效应。TiO2/PANI/GO复合材料在100 ppm NH3下实现了96%的灵敏度，响应时间和恢复时间分别为124秒和102秒，优于之前报道的NH3₃传感器。此外，该复合材料在50天内表现出了出色的稳定性，并且对NH3有很高的选择性，可以抵抗NO2、SO2、H2S和CO等干扰气体。这些结果表明，TiO2/PANI/GO具有作为实时气体传感应用的强大候选材料的潜力。

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

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.