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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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.