| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1242033 | Talanta | 2015 | 8 Pages |
•Reduction of GO and conversion of WO3 nanoparticles were produced, simultaneously.•New conductive path was formed by the embedded RGO in RGO/WO3, nanocomposite film.•RGO/WO3 film exhibited high response for NO2 gas at room-temperature.
One-pot polyol process was combined with the metal organic decomposition (MOD) method to fabricate a room-temperature NO2 gas sensor based on tungsten oxide and reduced graphene oxide (RGO/WO3) nanocomposite films. Fourier Transform infrared spectrometer (FTIR), X-ray diffractometry (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to analyze the microstructure and morphology of the fabricated films. The electrical and NO2 gas-sensing properties of WO3 to which various amounts of RGO were added were measured in detail as a function of concentration of NO2 gas at room temperature, to elucidate the contribution of RGO to the NO2 gas-sensing capacity. The NO2 gas-sensing mechanism of the RGO/WO3 nanocomposite films were explained by considering their composition and microstructures. The sensor that was based on a nanocomposite film of RGO/WO3 exhibited a strong response to low concentrations of NO2 gas at room temperature, satisfactory linearity and favorable long-term stability.
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