Abstract
A simple self-sacrificed template method was used to prepare a polypyrrole (PPy) nanotubes sensor for the detection of ammonia (NH3). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to analyse the morphology of the fabricated membrane. The results show that pyrrole was uniformly polymerised around the sodium vanadate (Na5V12O32) nanowires, and the Na5V12O32 nanowires along with Ti foil were subsequently dissolved thoroughly with citric acid (0.5 M) and hydrofluoric acid (10%, v/v) to obtain a freestanding flexible PPy nanotube membrane. The resulting PPy membrane was sensitive to NH3 and exhibited rapid and reproducible response at room temperature.
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