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In this paper, composite film based on polyvinylpyrrolidone(PVP)/graphene oxide(GO) was fabricated by spray method on AT-cut 9.986 MHz quartz crystal microbalance(QCM) for NH_3 sensing. The thin films were characterized by scanning electron microscope(SEM), Fourier transform infrared spectroscopy(FTIR) and ultraviolet-visible spectroscopy(UV-VIS) to investigate the morphologies and the composition contents, respectively. The experimental results reveal that PVP/GO based sensor holds higher sensitivity, larger responsiveness and smaller baseline drift than those based on pure PVP at room temperature. Besides, the prepared sensor exhibits greater response to NH_3 than other gases such as CO, CO_2 and NO_2 at the same concentration. The good linearity, reproducibility and stability demonstrate the practicability of PVP/GO hybrid film in detecting NH_3.
In this paper, composite film based on polyvinylpyrrolidone (PVP) / graphene oxide (GO) was fabricated by spray method on AT-cut 9.986 MHz quartz crystal microbalance (QCM) for NH3 sensing. The thin films were characterized by scanning electron microscope ), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible spectroscopy (UV-VIS) to investigate the morphologies and the composition contents, respectively. The experimental results reveal that PVP / GO based sensor holds higher sensitivity, larger responsiveness and smaller baseline drift than those based on pure PVP at room temperature. Besides, the prepared sensor exhibits greater response to NH 3 than other gases such as CO, CO 2 and NO 2 at the same concentration. The good linearity, reproducibility and stability demonstrate the practicability of PVP / GO hybrid film in detecting NH_3.