Abstract:
In this study, polypyrrole nanotubes (PPy NTs) as H2S gas sensors were fabricated at room temperature, and report the effect of oxidant- to- monomer (O/M) molar ratio and (Ag nanoparticles, Ag-NiO nanocomposite) adding on the H
2
S gas sensing behavior, where the nanoparticles covered the nanotubes and some agglomeration was observed. The structure of the nanotubes was proved using field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS) showed the compositions of all materials that exist in the prepared nanostructures. H
2
S gas sensing of PPy NTs for each molar ratio tested. It was found that the H
2
S gas sensing enhanced with an increase in the oxidant concentration. The response of H
2
S gas of the PPy NTs changed by (Ag) and (Ag-NiO) nanocomposite adding. It was observed that the largest response of H
2
S gas was 30.57 at 25 °C operating temperature, the response time and recovery time were 48.7 seconds and 10.7 seconds.
Keywords:
Conducting polymer, Polypyrrole nanotube, H
2
S gas sensor.
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