Huiling Tai
材料科学技术（英）
Polyaniline (PANI), polyaniline/titanium dioxide (PANI/TiO2), polyaniline/tin oxide (PANI/SnO2) and polyaniline/indium oxide (PANI/In2O3) thin films were developed by using an in-situ self-assembly method at -10°C. Chemical structure, optical property and morphology of all the thin films were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, UV-Vis absorption spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). NH3 gas-sensing properties of PANI and PANI nanocomposite thin films were examined at ambient temperature. The results showed that all the sensors composed of PANI nanocomposite thin films had faster response/recovery rate with better reproducibility, selectivity and long-term stability to NH3 than PANI thin film sensor, and PANI/TiO2 nanocomposite thin film sensor showed optimum NH3 gas-sensing characteristics. The effect of humidity on the responses of all the sensors was also investigated.
关键词:
PANI/TiO2
,
聚苯胺/二氧化锡
,
聚苯胺/氧化铟
,
薄膜
,
氨气
