Interfacial photo-reduction of graphene oxide on defective WO3−x for multifunctional applications in sensor, catalyst and supercapacitor
Interfacial composite with improved carrier separation is promising to achieve multifunctionality and thus contribute to the carbon neutrality and sustainability of our society. Herein, we demonstrate a facile defect-assisted photo-reduction strategy to rationally design interfacial rGO/WO 3−x composites with versatile properties. Under light irradiation, the accumulated electrons in oxygen-defective WO 3−x endow partial restoration of the π network within GO nanosheets. The in-situ formed rGO/WO 3−x not only broadens optical absorption but also accelerates carrier migration, enabling superior gas-sensing, photocatalytic and energy storage applications. When used as sensing material of smart sensors, the resultant rGO/WO 3−x exhibits high response (8.4), low detection limit (92 ppb), good selectivity, fast response, and long-term stability (7 weeks) to ppm-level triethylamine. As an efficient photocatalyst, the photocatalytic kinetic of rGO/WO 3−x towards visible-light-driven RhB degradation is promoted about 7 times as compared with that of pristine WO 3−x . The synergism of suitable components endows the rGO/WO 3−x supercapacitor with high capacity (380F/g) over prolonged cycling. This work provided a successful approach for in-situ formation of interfacial composites and thus broadens the material’s versatility for advanced nanotechnology.
危险品化学品经营许可证（带存储）