期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 10, 页码 6343-6355出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.01.141
关键词
In-situ polymerization; TiO2/PANI composite; Chemiresistor sensor; H-2 gas sensing; Transmission electron microscopy (TEM); Scanning electron microscopy (SEM)
The Polyaniline (PANI) and Titanium dioxide (TiO2)/PANI composite thin film based chemiresistor type gas sensors for hydrogen (H-2) gas sensing application are presented in this paper. Pure PANI and TiO2/PANI composites with different wt% of TiO2 were synthesized by chemical oxidative polymerization of aniline using ammonium persulfate in acidic medium at 0-5 degrees C. Thin films of PANI and TiO2/PANI composites were deposited on copper (Cu) interdigited electrodes (IDE) by spin coating method to prepare the chemiresistor sensor. Finally, the response of these chemiresistor sensors for H-2 gas was evaluated by monitoring the change in electrical resistance at room temperature. It was observed that the TiO2/PANI composite thin film based chemiresistor sensors show a higher response as compared to pure PANI sensor. The structural and optical properties of these composite films have been characterized by X-ray diffraction (XRD) and UV-Visible (UV-Vis) spectroscopy respectively. morphological and structural properties of these composites have also been characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) respectively. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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