Junlong Huang, G. Xie, Yong Zhou, Tao Xie, Guangjin Yang
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NO2 gas sensor based on polyvinylpyrrolidone/reduced graphene oxide nanocomposite
Pure polyvinylpyrrolidone (PVP) film, reduced graphene oxide (RGO) film and PVP/RGO composite film were coated on quartz crystal microbalance (QCM) for nitrogen oxide (NO2) sensing at room temperature. These films were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), respectively. Because only a few RGO were deposited on QCM, the sensor based on RGO almost had no response to NO2. In addition, compared with the response of pure PVP film, an increase in the response of PVP/RGO composite film may be caused by the more absorption area for NO2 molecule adsorption.
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